whoa - so much - new features (UPC,etc) - Sentry for app logging! so much more !

2026-01-11 19:05:43 -08:00
parent f6c0c082bc
commit 11aeac5edd
82 changed files with 23503 additions and 110 deletions
--- a/.env.example
+++ b/.env.example
@@ -83,3 +83,22 @@ CLEANUP_WORKER_CONCURRENCY=10

 # Worker lock duration in milliseconds (default: 2 minutes)
 WORKER_LOCK_DURATION=120000
+
+# ===================
+# Error Tracking (ADR-015)
+# ===================
+# Sentry-compatible error tracking via Bugsink (self-hosted)
+# DSNs are created in Bugsink UI at http://localhost:8000 (dev) or your production URL
+# Backend DSN - for Express/Node.js errors
+SENTRY_DSN=
+# Frontend DSN - for React/browser errors (uses VITE_ prefix)
+VITE_SENTRY_DSN=
+# Environment name for error grouping (defaults to NODE_ENV)
+SENTRY_ENVIRONMENT=development
+VITE_SENTRY_ENVIRONMENT=development
+# Enable/disable error tracking (default: true)
+SENTRY_ENABLED=true
+VITE_SENTRY_ENABLED=true
+# Enable debug mode for SDK troubleshooting (default: false)
+SENTRY_DEBUG=false
+VITE_SENTRY_DEBUG=false
--- a/.nycrc.json
+++ b/.nycrc.json
@@ -0,0 +1,5 @@
+{
+  "text": {
+    "maxCols": 200
+  }
+}
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -194,18 +194,61 @@ cb(null, `${file.fieldname}-${uniqueSuffix}-${sanitizedOriginalName}`);

 The following MCP servers are configured for this project:

-| Server              | Purpose                                  |
-| ------------------- | ---------------------------------------- |
-| gitea-projectium    | Gitea API for gitea.projectium.com       |
-| gitea-torbonium     | Gitea API for gitea.torbonium.com        |
-| podman              | Container management                     |
-| filesystem          | File system access                       |
-| fetch               | Web fetching                             |
-| markitdown          | Convert documents to markdown            |
-| sequential-thinking | Step-by-step reasoning                   |
-| memory              | Knowledge graph persistence              |
-| postgres            | Direct database queries (localhost:5432) |
-| playwright          | Browser automation and testing           |
-| redis               | Redis cache inspection (localhost:6379)  |
+| Server                | Purpose                                     |
+| --------------------- | ------------------------------------------- |
+| gitea-projectium      | Gitea API for gitea.projectium.com          |
+| gitea-torbonium       | Gitea API for gitea.torbonium.com           |
+| podman                | Container management                        |
+| filesystem            | File system access                          |
+| fetch                 | Web fetching                                |
+| markitdown            | Convert documents to markdown               |
+| sequential-thinking   | Step-by-step reasoning                      |
+| memory                | Knowledge graph persistence                 |
+| postgres              | Direct database queries (localhost:5432)    |
+| playwright            | Browser automation and testing              |
+| redis                 | Redis cache inspection (localhost:6379)     |
+| sentry-selfhosted-mcp | Error tracking via Bugsink (localhost:8000) |

 **Note:** MCP servers are currently only available in **Claude CLI**. Due to a bug in Claude VS Code extension, MCP servers do not work there yet.
+
+### Sentry/Bugsink MCP Server Setup (ADR-015)
+
+To enable Claude Code to query and analyze application errors from Bugsink:
+
+1. **Install the MCP server**:
+
+   ```bash
+   # Clone the sentry-selfhosted-mcp repository
+   git clone https://github.com/ddfourtwo/sentry-selfhosted-mcp.git
+   cd sentry-selfhosted-mcp
+   npm install
+   ```
+
+2. **Configure Claude Code** (add to `.claude/mcp.json`):
+
+   ```json
+   {
+     "sentry-selfhosted-mcp": {
+       "command": "node",
+       "args": ["/path/to/sentry-selfhosted-mcp/dist/index.js"],
+       "env": {
+         "SENTRY_URL": "http://localhost:8000",
+         "SENTRY_AUTH_TOKEN": "<get-from-bugsink-ui>",
+         "SENTRY_ORG_SLUG": "flyer-crawler"
+       }
+     }
+   }
+   ```
+
+3. **Get the auth token**:
+   - Navigate to Bugsink UI at `http://localhost:8000`
+   - Log in with admin credentials
+   - Go to Settings > API Keys
+   - Create a new API key with read access
+
+4. **Available capabilities**:
+   - List projects and issues
+   - View detailed error events
+   - Search by error message or stack trace
+   - Update issue status (resolve, ignore)
+   - Add comments to issues
--- a/DEPLOYMENT.md
+++ b/DEPLOYMENT.md
@@ -204,8 +204,68 @@ pm2 restart flyer-crawler-api

 ---

+## Error Tracking with Bugsink (ADR-015)
+
+Bugsink is a self-hosted Sentry-compatible error tracking system. See [docs/adr/0015-application-performance-monitoring-and-error-tracking.md](docs/adr/0015-application-performance-monitoring-and-error-tracking.md) for the full architecture decision.
+
+### Creating Bugsink Projects and DSNs
+
+After Bugsink is installed and running, you need to create projects and obtain DSNs:
+
+1. **Access Bugsink UI**: Navigate to `http://localhost:8000`
+
+2. **Log in** with your admin credentials
+
+3. **Create Backend Project**:
+   - Click "Create Project"
+   - Name: `flyer-crawler-backend`
+   - Platform: Node.js
+   - Copy the generated DSN (format: `http://<key>@localhost:8000/<project_id>`)
+
+4. **Create Frontend Project**:
+   - Click "Create Project"
+   - Name: `flyer-crawler-frontend`
+   - Platform: React
+   - Copy the generated DSN
+
+5. **Configure Environment Variables**:
+
+   ```bash
+   # Backend (server-side)
+   export SENTRY_DSN=http://<backend-key>@localhost:8000/<backend-project-id>
+
+   # Frontend (client-side, exposed to browser)
+   export VITE_SENTRY_DSN=http://<frontend-key>@localhost:8000/<frontend-project-id>
+
+   # Shared settings
+   export SENTRY_ENVIRONMENT=production
+   export VITE_SENTRY_ENVIRONMENT=production
+   export SENTRY_ENABLED=true
+   export VITE_SENTRY_ENABLED=true
+   ```
+
+### Testing Error Tracking
+
+Verify Bugsink is receiving events:
+
+```bash
+npx tsx scripts/test-bugsink.ts
+```
+
+This sends test error and info events. Check the Bugsink UI for:
+
+- `BugsinkTestError` in the backend project
+- Info message "Test info message from test-bugsink.ts"
+
+### Sentry SDK v10+ HTTP DSN Limitation
+
+The Sentry SDK v10+ enforces HTTPS-only DSNs by default. Since Bugsink runs locally over HTTP, our implementation uses the Sentry Store API directly instead of the SDK's built-in transport. This is handled transparently by the `sentry.server.ts` and `sentry.client.ts` modules.
+
+---
+
 ## Related Documentation

 - [Database Setup](DATABASE.md) - PostgreSQL and PostGIS configuration
 - [Authentication Setup](AUTHENTICATION.md) - OAuth provider configuration
 - [Installation Guide](INSTALL.md) - Local development setup
+- [Bare-Metal Server Setup](docs/BARE-METAL-SETUP.md) - Manual server installation guide
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -65,8 +65,67 @@ RUN python3 -m venv /opt/bugsink \
    && /opt/bugsink/bin/pip install --upgrade pip \
    && /opt/bugsink/bin/pip install bugsink gunicorn psycopg2-binary

-# Create Bugsink directories
-RUN mkdir -p /var/log/bugsink /var/lib/bugsink
+# Create Bugsink directories and configuration
+RUN mkdir -p /var/log/bugsink /var/lib/bugsink /opt/bugsink/conf
+
+# Create Bugsink configuration file (Django settings module)
+# This file is imported by bugsink-manage via DJANGO_SETTINGS_MODULE
+# Based on bugsink/conf_templates/docker.py.template but customized for our setup
+RUN echo 'import os\n\
+from urllib.parse import urlparse\n\
+\n\
+from bugsink.settings.default import *\n\
+from bugsink.settings.default import DATABASES, SILENCED_SYSTEM_CHECKS\n\
+from bugsink.conf_utils import deduce_allowed_hosts, deduce_script_name\n\
+\n\
+IS_DOCKER = True\n\
+\n\
+# Security settings\n\
+SECRET_KEY = os.getenv("SECRET_KEY")\n\
+DEBUG = os.getenv("DEBUG", "False").lower() in ("true", "1", "yes")\n\
+\n\
+# Silence cookie security warnings for dev (no HTTPS)\n\
+SILENCED_SYSTEM_CHECKS += ["security.W012", "security.W016"]\n\
+\n\
+# Database configuration from DATABASE_URL environment variable\n\
+if os.getenv("DATABASE_URL"):\n\
+    DATABASE_URL = os.getenv("DATABASE_URL")\n\
+    parsed = urlparse(DATABASE_URL)\n\
+    \n\
+    if parsed.scheme in ["postgres", "postgresql"]:\n\
+        DATABASES["default"] = {\n\
+            "ENGINE": "django.db.backends.postgresql",\n\
+            "NAME": parsed.path.lstrip("/"),\n\
+            "USER": parsed.username,\n\
+            "PASSWORD": parsed.password,\n\
+            "HOST": parsed.hostname,\n\
+            "PORT": parsed.port or "5432",\n\
+        }\n\
+\n\
+# Snappea (background task runner) settings\n\
+SNAPPEA = {\n\
+    "TASK_ALWAYS_EAGER": False,\n\
+    "WORKAHOLIC": True,\n\
+    "NUM_WORKERS": 2,\n\
+    "PID_FILE": None,\n\
+}\n\
+DATABASES["snappea"]["NAME"] = "/tmp/snappea.sqlite3"\n\
+\n\
+# Site settings\n\
+_PORT = os.getenv("PORT", "8000")\n\
+BUGSINK = {\n\
+    "BASE_URL": os.getenv("BASE_URL", f"http://localhost:{_PORT}"),\n\
+    "SITE_TITLE": os.getenv("SITE_TITLE", "Flyer Crawler Error Tracking"),\n\
+    "SINGLE_USER": os.getenv("SINGLE_USER", "True").lower() in ("true", "1", "yes"),\n\
+    "SINGLE_TEAM": os.getenv("SINGLE_TEAM", "True").lower() in ("true", "1", "yes"),\n\
+    "PHONEHOME": False,\n\
+}\n\
+\n\
+ALLOWED_HOSTS = deduce_allowed_hosts(BUGSINK["BASE_URL"])\n\
+\n\
+# Console email backend for dev\n\
+EMAIL_BACKEND = "bugsink.email_backends.QuietConsoleEmailBackend"\n\
+' > /opt/bugsink/conf/bugsink_conf.py

 # Create Bugsink startup script
 # Uses DATABASE_URL environment variable (standard Docker approach per docs)
@@ -78,6 +137,11 @@ export DATABASE_URL="postgresql://${BUGSINK_DB_USER:-bugsink}:${BUGSINK_DB_PASSW
 # SECRET_KEY is required by Bugsink/Django\n\
 export SECRET_KEY="${BUGSINK_SECRET_KEY:-dev-bugsink-secret-key-minimum-50-characters-for-security}"\n\
 \n\
+# Create superuser if not exists (for dev convenience)\n\
+if [ -n "$BUGSINK_ADMIN_EMAIL" ] && [ -n "$BUGSINK_ADMIN_PASSWORD" ]; then\n\
+    export CREATE_SUPERUSER="${BUGSINK_ADMIN_EMAIL}:${BUGSINK_ADMIN_PASSWORD}"\n\
+fi\n\
+\n\
 # Wait for PostgreSQL to be ready\n\
 until pg_isready -h ${BUGSINK_DB_HOST:-postgres} -p ${BUGSINK_DB_PORT:-5432} -U ${BUGSINK_DB_USER:-bugsink}; do\n\
    echo "Waiting for PostgreSQL..."\n\
@@ -87,13 +151,25 @@ done\n\
 echo "PostgreSQL is ready. Starting Bugsink..."\n\
 echo "DATABASE_URL: postgresql://${BUGSINK_DB_USER}:***@${BUGSINK_DB_HOST}:${BUGSINK_DB_PORT}/${BUGSINK_DB_NAME}"\n\
 \n\
+# Change to config directory so bugsink_conf.py can be found\n\
+cd /opt/bugsink/conf\n\
+\n\
 # Run migrations\n\
+echo "Running database migrations..."\n\
 /opt/bugsink/bin/bugsink-manage migrate --noinput\n\
 \n\
-# Create superuser if not exists (for dev convenience)\n\
-if [ -n "$BUGSINK_ADMIN_EMAIL" ] && [ -n "$BUGSINK_ADMIN_PASSWORD" ]; then\n\
-    export CREATE_SUPERUSER="${BUGSINK_ADMIN_EMAIL}:${BUGSINK_ADMIN_PASSWORD}"\n\
-    echo "Superuser configured: ${BUGSINK_ADMIN_EMAIL}"\n\
+# Create superuser if CREATE_SUPERUSER is set (format: email:password)\n\
+if [ -n "$CREATE_SUPERUSER" ]; then\n\
+    IFS=":" read -r ADMIN_EMAIL ADMIN_PASS <<< "$CREATE_SUPERUSER"\n\
+    /opt/bugsink/bin/bugsink-manage shell -c "\n\
+from django.contrib.auth import get_user_model\n\
+User = get_user_model()\n\
+if not User.objects.filter(email='"'"'$ADMIN_EMAIL'"'"').exists():\n\
+    User.objects.create_superuser('"'"'$ADMIN_EMAIL'"'"', '"'"'$ADMIN_PASS'"'"')\n\
+    print('"'"'Superuser created'"'"')\n\
+else:\n\
+    print('"'"'Superuser already exists'"'"')\n\
+" || true\n\
 fi\n\
 \n\
 # Start Bugsink with Gunicorn\n\
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -103,6 +103,7 @@ You are now inside the Ubuntu container's shell.
   ```

 4. **Install Project Dependencies**:
+
   ```bash
   npm install
   ```
--- a/compose.dev.yml
+++ b/compose.dev.yml
@@ -78,6 +78,15 @@ services:
      - BUGSINK_ADMIN_EMAIL=admin@localhost
      - BUGSINK_ADMIN_PASSWORD=admin
      - BUGSINK_SECRET_KEY=dev-bugsink-secret-key-minimum-50-characters-for-security
+      # Sentry SDK configuration (points to local Bugsink)
+      - SENTRY_DSN=http://59a58583-e869-7697-f94a-cfa0337676a8@localhost:8000/1
+      - VITE_SENTRY_DSN=http://d5fc5221-4266-ff2f-9af8-5689696072f3@localhost:8000/2
+      - SENTRY_ENVIRONMENT=development
+      - VITE_SENTRY_ENVIRONMENT=development
+      - SENTRY_ENABLED=true
+      - VITE_SENTRY_ENABLED=true
+      - SENTRY_DEBUG=true
+      - VITE_SENTRY_DEBUG=true
    depends_on:
      postgres:
        condition: service_healthy
--- a/docs/BARE-METAL-SETUP.md
+++ b/docs/BARE-METAL-SETUP.md
@@ -0,0 +1,637 @@
+# Bare-Metal Server Setup Guide
+
+This guide covers the manual installation of Flyer Crawler and its dependencies on a bare-metal Ubuntu server (e.g., a colocation server). This is the definitive reference for setting up a production environment without containers.
+
+**Target Environment**: Ubuntu 22.04 LTS (or newer)
+
+---
+
+## Table of Contents
+
+1. [System Prerequisites](#system-prerequisites)
+2. [PostgreSQL Setup](#postgresql-setup)
+3. [Redis Setup](#redis-setup)
+4. [Node.js and Application Setup](#nodejs-and-application-setup)
+5. [PM2 Process Manager](#pm2-process-manager)
+6. [NGINX Reverse Proxy](#nginx-reverse-proxy)
+7. [Bugsink Error Tracking](#bugsink-error-tracking)
+8. [Logstash Log Aggregation](#logstash-log-aggregation)
+9. [SSL/TLS with Let's Encrypt](#ssltls-with-lets-encrypt)
+10. [Firewall Configuration](#firewall-configuration)
+11. [Maintenance Commands](#maintenance-commands)
+
+---
+
+## System Prerequisites
+
+Update the system and install essential packages:
+
+```bash
+sudo apt update && sudo apt upgrade -y
+sudo apt install -y curl git build-essential python3 python3-pip python3-venv
+```
+
+---
+
+## PostgreSQL Setup
+
+### Install PostgreSQL 14+ with PostGIS
+
+```bash
+# Add PostgreSQL APT repository
+sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+sudo apt update
+
+# Install PostgreSQL and PostGIS
+sudo apt install -y postgresql-14 postgresql-14-postgis-3
+```
+
+### Create Application Database and User
+
+```bash
+sudo -u postgres psql
+```
+
+```sql
+-- Create application user and database
+CREATE USER flyer_crawler WITH PASSWORD 'YOUR_SECURE_PASSWORD';
+CREATE DATABASE flyer_crawler OWNER flyer_crawler;
+
+-- Connect to the database and enable extensions
+\c flyer_crawler
+
+CREATE EXTENSION IF NOT EXISTS postgis;
+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+
+-- Grant privileges
+GRANT ALL PRIVILEGES ON DATABASE flyer_crawler TO flyer_crawler;
+
+\q
+```
+
+### Create Bugsink Database (for error tracking)
+
+```bash
+sudo -u postgres psql
+```
+
+```sql
+-- Create dedicated Bugsink user and database
+CREATE USER bugsink WITH PASSWORD 'BUGSINK_SECURE_PASSWORD';
+CREATE DATABASE bugsink OWNER bugsink;
+GRANT ALL PRIVILEGES ON DATABASE bugsink TO bugsink;
+
+\q
+```
+
+### Configure PostgreSQL for Remote Access (if needed)
+
+Edit `/etc/postgresql/14/main/postgresql.conf`:
+
+```conf
+listen_addresses = 'localhost'  # Change to '*' for remote access
+```
+
+Edit `/etc/postgresql/14/main/pg_hba.conf` to add allowed hosts:
+
+```conf
+# Local connections
+local   all   all   peer
+host    all   all   127.0.0.1/32   scram-sha-256
+```
+
+Restart PostgreSQL:
+
+```bash
+sudo systemctl restart postgresql
+```
+
+---
+
+## Redis Setup
+
+### Install Redis
+
+```bash
+sudo apt install -y redis-server
+```
+
+### Configure Redis Password
+
+Edit `/etc/redis/redis.conf`:
+
+```conf
+requirepass YOUR_REDIS_PASSWORD
+```
+
+Restart Redis:
+
+```bash
+sudo systemctl restart redis-server
+sudo systemctl enable redis-server
+```
+
+### Test Redis Connection
+
+```bash
+redis-cli -a YOUR_REDIS_PASSWORD ping
+# Should output: PONG
+```
+
+---
+
+## Node.js and Application Setup
+
+### Install Node.js 20.x
+
+```bash
+curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
+sudo apt install -y nodejs
+```
+
+Verify installation:
+
+```bash
+node --version  # Should output v20.x.x
+npm --version
+```
+
+### Install System Dependencies for PDF Processing
+
+```bash
+sudo apt install -y poppler-utils  # For pdftocairo
+```
+
+### Clone and Install Application
+
+```bash
+# Create application directory
+sudo mkdir -p /opt/flyer-crawler
+sudo chown $USER:$USER /opt/flyer-crawler
+
+# Clone repository
+cd /opt/flyer-crawler
+git clone https://gitea.projectium.com/flyer-crawler/flyer-crawler.projectium.com.git .
+
+# Install dependencies
+npm install
+
+# Build for production
+npm run build
+```
+
+### Configure Environment Variables
+
+Create a systemd environment file at `/etc/flyer-crawler/environment`:
+
+```bash
+sudo mkdir -p /etc/flyer-crawler
+sudo nano /etc/flyer-crawler/environment
+```
+
+Add the following (replace with actual values):
+
+```bash
+# Database
+DB_HOST=localhost
+DB_USER=flyer_crawler
+DB_PASSWORD=YOUR_SECURE_PASSWORD
+DB_DATABASE_PROD=flyer_crawler
+
+# Redis
+REDIS_HOST=localhost
+REDIS_PORT=6379
+REDIS_PASSWORD_PROD=YOUR_REDIS_PASSWORD
+
+# Authentication
+JWT_SECRET=YOUR_LONG_RANDOM_JWT_SECRET
+
+# Google APIs
+VITE_GOOGLE_GENAI_API_KEY=YOUR_GEMINI_API_KEY
+GOOGLE_MAPS_API_KEY=YOUR_MAPS_API_KEY
+
+# Sentry/Bugsink Error Tracking (ADR-015)
+SENTRY_DSN=http://BACKEND_KEY@localhost:8000/1
+VITE_SENTRY_DSN=http://FRONTEND_KEY@localhost:8000/2
+SENTRY_ENVIRONMENT=production
+VITE_SENTRY_ENVIRONMENT=production
+SENTRY_ENABLED=true
+VITE_SENTRY_ENABLED=true
+SENTRY_DEBUG=false
+VITE_SENTRY_DEBUG=false
+
+# Application
+NODE_ENV=production
+PORT=3001
+```
+
+Secure the file:
+
+```bash
+sudo chmod 600 /etc/flyer-crawler/environment
+```
+
+---
+
+## PM2 Process Manager
+
+### Install PM2 Globally
+
+```bash
+sudo npm install -g pm2
+```
+
+### Start Application with PM2
+
+```bash
+cd /opt/flyer-crawler
+npm run start:prod
+```
+
+This starts three processes:
+
+- `flyer-crawler-api` - Main API server (port 3001)
+- `flyer-crawler-worker` - Background job worker
+- `flyer-crawler-analytics-worker` - Analytics processing worker
+
+### Configure PM2 Startup
+
+```bash
+pm2 startup systemd
+# Follow the command output to enable PM2 on boot
+
+pm2 save
+```
+
+### PM2 Log Rotation
+
+```bash
+pm2 install pm2-logrotate
+pm2 set pm2-logrotate:max_size 10M
+pm2 set pm2-logrotate:retain 14
+pm2 set pm2-logrotate:compress true
+```
+
+---
+
+## NGINX Reverse Proxy
+
+### Install NGINX
+
+```bash
+sudo apt install -y nginx
+```
+
+### Create Site Configuration
+
+Create `/etc/nginx/sites-available/flyer-crawler.projectium.com`:
+
+```nginx
+server {
+    listen 80;
+    server_name flyer-crawler.projectium.com;
+
+    # Redirect HTTP to HTTPS (uncomment after SSL setup)
+    # return 301 https://$server_name$request_uri;
+
+    location / {
+        proxy_pass http://localhost:5173;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade;
+    }
+
+    location /api {
+        proxy_pass http://localhost:3001;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade;
+
+        # File upload size limit
+        client_max_body_size 50M;
+    }
+
+    # MIME type fix for .mjs files
+    types {
+        application/javascript js mjs;
+    }
+}
+```
+
+### Enable the Site
+
+```bash
+sudo ln -s /etc/nginx/sites-available/flyer-crawler.projectium.com /etc/nginx/sites-enabled/
+sudo nginx -t
+sudo systemctl reload nginx
+sudo systemctl enable nginx
+```
+
+---
+
+## Bugsink Error Tracking
+
+Bugsink is a lightweight, self-hosted Sentry-compatible error tracking system. See [ADR-015](adr/0015-application-performance-monitoring-and-error-tracking.md) for architecture details.
+
+### Install Bugsink
+
+```bash
+# Create virtual environment
+sudo mkdir -p /opt/bugsink
+sudo python3 -m venv /opt/bugsink/venv
+
+# Activate and install
+source /opt/bugsink/venv/bin/activate
+pip install bugsink
+
+# Create wrapper scripts
+sudo tee /opt/bugsink/bin/bugsink-manage << 'EOF'
+#!/bin/bash
+source /opt/bugsink/venv/bin/activate
+exec python -m bugsink.manage "$@"
+EOF
+
+sudo tee /opt/bugsink/bin/bugsink-runserver << 'EOF'
+#!/bin/bash
+source /opt/bugsink/venv/bin/activate
+exec python -m bugsink.runserver "$@"
+EOF
+
+sudo chmod +x /opt/bugsink/bin/bugsink-manage /opt/bugsink/bin/bugsink-runserver
+```
+
+### Configure Bugsink
+
+Create `/etc/bugsink/environment`:
+
+```bash
+sudo mkdir -p /etc/bugsink
+sudo nano /etc/bugsink/environment
+```
+
+```bash
+SECRET_KEY=YOUR_RANDOM_50_CHAR_SECRET_KEY
+DATABASE_URL=postgresql://bugsink:BUGSINK_SECURE_PASSWORD@localhost:5432/bugsink
+BASE_URL=http://localhost:8000
+PORT=8000
+```
+
+```bash
+sudo chmod 600 /etc/bugsink/environment
+```
+
+### Initialize Bugsink Database
+
+```bash
+source /etc/bugsink/environment
+/opt/bugsink/bin/bugsink-manage migrate
+/opt/bugsink/bin/bugsink-manage migrate --database=snappea
+```
+
+### Create Bugsink Admin User
+
+```bash
+/opt/bugsink/bin/bugsink-manage createsuperuser
+```
+
+### Create Systemd Service
+
+Create `/etc/systemd/system/bugsink.service`:
+
+```ini
+[Unit]
+Description=Bugsink Error Tracking
+After=network.target postgresql.service
+
+[Service]
+Type=simple
+User=www-data
+Group=www-data
+EnvironmentFile=/etc/bugsink/environment
+ExecStart=/opt/bugsink/bin/bugsink-runserver 0.0.0.0:8000
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+```
+
+```bash
+sudo systemctl daemon-reload
+sudo systemctl enable bugsink
+sudo systemctl start bugsink
+```
+
+### Create Bugsink Projects and Get DSNs
+
+1. Access Bugsink UI at `http://localhost:8000`
+2. Log in with admin credentials
+3. Create projects:
+   - **flyer-crawler-backend** (Platform: Node.js)
+   - **flyer-crawler-frontend** (Platform: React)
+4. Copy the DSNs from each project's settings
+5. Update `/etc/flyer-crawler/environment` with the DSNs
+
+### Test Error Tracking
+
+```bash
+cd /opt/flyer-crawler
+npx tsx scripts/test-bugsink.ts
+```
+
+Check Bugsink UI for test events.
+
+---
+
+## Logstash Log Aggregation
+
+Logstash aggregates logs from the application and infrastructure, forwarding errors to Bugsink.
+
+### Install Logstash
+
+```bash
+# Add Elastic APT repository
+wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elastic-keyring.gpg
+echo "deb [signed-by=/usr/share/keyrings/elastic-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list
+
+sudo apt update
+sudo apt install -y logstash
+```
+
+### Configure Logstash Pipeline
+
+Create `/etc/logstash/conf.d/bugsink.conf`:
+
+```conf
+input {
+  # Pino application logs
+  file {
+    path => "/opt/flyer-crawler/logs/*.log"
+    codec => json
+    type => "pino"
+    tags => ["app"]
+  }
+
+  # Redis logs
+  file {
+    path => "/var/log/redis/*.log"
+    type => "redis"
+    tags => ["redis"]
+  }
+}
+
+filter {
+  # Pino error detection (level 50 = error, 60 = fatal)
+  if [type] == "pino" and [level] >= 50 {
+    mutate { add_tag => ["error"] }
+  }
+
+  # Redis error detection
+  if [type] == "redis" {
+    grok {
+      match => { "message" => "%{POSINT:pid}:%{WORD:role} %{MONTHDAY} %{MONTH} %{TIME} %{WORD:loglevel} %{GREEDYDATA:redis_message}" }
+    }
+    if [loglevel] in ["WARNING", "ERROR"] {
+      mutate { add_tag => ["error"] }
+    }
+  }
+}
+
+output {
+  if "error" in [tags] {
+    http {
+      url => "http://localhost:8000/api/1/store/"
+      http_method => "post"
+      format => "json"
+      headers => {
+        "X-Sentry-Auth" => "Sentry sentry_version=7, sentry_client=logstash/1.0, sentry_key=YOUR_BACKEND_DSN_KEY"
+      }
+    }
+  }
+}
+```
+
+Replace `YOUR_BACKEND_DSN_KEY` with the key from your backend project DSN.
+
+### Start Logstash
+
+```bash
+sudo systemctl enable logstash
+sudo systemctl start logstash
+```
+
+---
+
+## SSL/TLS with Let's Encrypt
+
+### Install Certbot
+
+```bash
+sudo apt install -y certbot python3-certbot-nginx
+```
+
+### Obtain Certificate
+
+```bash
+sudo certbot --nginx -d flyer-crawler.projectium.com
+```
+
+Certbot will automatically configure NGINX for HTTPS.
+
+### Auto-Renewal
+
+Certbot installs a systemd timer for automatic renewal. Verify:
+
+```bash
+sudo systemctl status certbot.timer
+```
+
+---
+
+## Firewall Configuration
+
+### Configure UFW
+
+```bash
+sudo ufw default deny incoming
+sudo ufw default allow outgoing
+
+# Allow SSH
+sudo ufw allow ssh
+
+# Allow HTTP and HTTPS
+sudo ufw allow 80/tcp
+sudo ufw allow 443/tcp
+
+# Enable firewall
+sudo ufw enable
+```
+
+**Important**: Bugsink (port 8000) should NOT be exposed externally. It listens on localhost only.
+
+---
+
+## Maintenance Commands
+
+### Application Management
+
+| Task                  | Command                                                                                |
+| --------------------- | -------------------------------------------------------------------------------------- |
+| View PM2 status       | `pm2 status`                                                                           |
+| View application logs | `pm2 logs`                                                                             |
+| Restart all processes | `pm2 restart all`                                                                      |
+| Restart specific app  | `pm2 restart flyer-crawler-api`                                                        |
+| Update application    | `cd /opt/flyer-crawler && git pull && npm install && npm run build && pm2 restart all` |
+
+### Service Management
+
+| Service    | Start                               | Stop                               | Status                               |
+| ---------- | ----------------------------------- | ---------------------------------- | ------------------------------------ |
+| PostgreSQL | `sudo systemctl start postgresql`   | `sudo systemctl stop postgresql`   | `sudo systemctl status postgresql`   |
+| Redis      | `sudo systemctl start redis-server` | `sudo systemctl stop redis-server` | `sudo systemctl status redis-server` |
+| NGINX      | `sudo systemctl start nginx`        | `sudo systemctl stop nginx`        | `sudo systemctl status nginx`        |
+| Bugsink    | `sudo systemctl start bugsink`      | `sudo systemctl stop bugsink`      | `sudo systemctl status bugsink`      |
+| Logstash   | `sudo systemctl start logstash`     | `sudo systemctl stop logstash`     | `sudo systemctl status logstash`     |
+
+### Database Backup
+
+```bash
+# Backup application database
+pg_dump -U flyer_crawler -h localhost flyer_crawler > backup_$(date +%Y%m%d).sql
+
+# Backup Bugsink database
+pg_dump -U bugsink -h localhost bugsink > bugsink_backup_$(date +%Y%m%d).sql
+```
+
+### Log Locations
+
+| Log               | Location                    |
+| ----------------- | --------------------------- |
+| Application (PM2) | `~/.pm2/logs/`              |
+| NGINX access      | `/var/log/nginx/access.log` |
+| NGINX error       | `/var/log/nginx/error.log`  |
+| PostgreSQL        | `/var/log/postgresql/`      |
+| Redis             | `/var/log/redis/`           |
+| Bugsink           | `journalctl -u bugsink`     |
+| Logstash          | `/var/log/logstash/`        |
+
+---
+
+## Related Documentation
+
+- [DEPLOYMENT.md](../DEPLOYMENT.md) - Container-based deployment
+- [DATABASE.md](../DATABASE.md) - Database schema and extensions
+- [AUTHENTICATION.md](../AUTHENTICATION.md) - OAuth provider setup
+- [ADR-015](adr/0015-application-performance-monitoring-and-error-tracking.md) - Error tracking architecture
--- a/docs/adr/0015-application-performance-monitoring-and-error-tracking.md
+++ b/docs/adr/0015-application-performance-monitoring-and-error-tracking.md
@@ -54,6 +54,7 @@ The React frontend will integrate `@sentry/react` SDK to:
 - Capture unhandled JavaScript errors
 - Report errors with component stack traces
 - Track user session context
+- **Frontend Error Correlation**: The global API client (Axios/Fetch wrapper) MUST intercept 4xx/5xx responses. It MUST extract the `x-request-id` header (if present) and attach it to the Sentry scope as a tag `api_request_id` before re-throwing the error. This allows developers to copy the ID from Sentry and search for it in backend logs.

 ### 4. Log Aggregation: Logstash

--- a/docs/adr/0051-asynchronous-context-propagation.md
+++ b/docs/adr/0051-asynchronous-context-propagation.md
@@ -0,0 +1,54 @@
+# ADR-051: Asynchronous Context Propagation
+
+**Date**: 2026-01-11
+
+**Status**: Accepted (Implemented)
+
+## Context
+
+Debugging asynchronous workflows is difficult because the `request_id` generated at the API layer is lost when a task is handed off to a background queue (BullMQ). Logs from the worker appear disconnected from the user action that triggered them.
+
+## Decision
+
+We will implement a context propagation pattern for all background jobs:
+
+1. **Job Data Payload**: All job data interfaces MUST include a `meta` object containing `requestId`, `userId`, and `origin`.
+2. **Worker Logger Initialization**: All BullMQ workers MUST initialize a child logger immediately upon processing a job, using the metadata passed in the payload.
+3. **Correlation**: The worker's logger must use the _same_ `request_id` as the initiating API request.
+
+## Implementation
+
+```typescript
+// 1. Enqueueing (API Layer)
+await queue.add('process-flyer', {
+  ...data,
+  meta: {
+    requestId: req.log.bindings().request_id, // Propagate ID
+    userId: req.user.id,
+  },
+});
+
+// 2. Processing (Worker Layer)
+const worker = new Worker('queue', async (job) => {
+  const { requestId, userId } = job.data.meta || {};
+
+  // Create context-aware logger for this specific job execution
+  const jobLogger = logger.child({
+    request_id: requestId || uuidv4(), // Use propagated ID or generate new
+    user_id: userId,
+    job_id: job.id,
+    service: 'worker',
+  });
+
+  try {
+    await processJob(job.data, jobLogger); // Pass logger down
+  } catch (err) {
+    jobLogger.error({ err }, 'Job failed');
+    throw err;
+  }
+});
+```
+
+## Consequences
+
+**Positive**: Complete traceability from API request -> Queue -> Worker execution. Drastically reduces time to find "what happened" to a specific user request.
--- a/docs/adr/0052-granular-debug-logging-strategy.md
+++ b/docs/adr/0052-granular-debug-logging-strategy.md
@@ -0,0 +1,42 @@
+# ADR-052: Granular Debug Logging Strategy
+
+**Date**: 2026-01-11
+
+**Status**: Proposed
+
+## Context
+
+Global log levels (INFO vs DEBUG) are too coarse. Developers need to inspect detailed debug information for specific subsystems (e.g., `ai-service`, `db-pool`) without being flooded by logs from the entire application.
+
+## Decision
+
+We will adopt a namespace-based debug filter pattern, similar to the `debug` npm package, but integrated into our Pino logger.
+
+1. **Logger Namespaces**: Every service/module logger must be initialized with a `module` property (e.g., `logger.child({ module: 'ai-service' })`).
+2. **Environment Filter**: We will support a `DEBUG_MODULES` environment variable that overrides the log level for matching modules.
+
+## Implementation
+
+In `src/services/logger.server.ts`:
+
+```typescript
+const debugModules = (process.env.DEBUG_MODULES || '').split(',').map((s) => s.trim());
+
+export const createScopedLogger = (moduleName: string) => {
+  // If DEBUG_MODULES contains "ai-service" or "*", force level to 'debug'
+  const isDebugEnabled = debugModules.includes('*') || debugModules.includes(moduleName);
+
+  return logger.child({
+    module: moduleName,
+    level: isDebugEnabled ? 'debug' : logger.level,
+  });
+};
+```
+
+## Usage
+
+To debug only AI and Database interactions:
+
+```bash
+DEBUG_MODULES=ai-service,db-repo npm run dev
+```
--- a/docs/adr/0053-worker-health-checks.md
+++ b/docs/adr/0053-worker-health-checks.md
@@ -0,0 +1,62 @@
+# ADR-053: Worker Health Checks and Stalled Job Monitoring
+
+**Date**: 2026-01-11
+
+**Status**: Proposed
+
+## Context
+
+Our application relies heavily on background workers (BullMQ) for flyer processing, analytics, and emails. If a worker process crashes (e.g., Out of Memory) or hangs, jobs may remain in the 'active' state indefinitely ("stalled") until BullMQ's fail-safe triggers.
+
+Currently, we lack:
+
+1. Visibility into queue depths and worker status via HTTP endpoints (for uptime monitors).
+2. A mechanism to detect if the worker process itself is alive, beyond just queue statistics.
+3. Explicit configuration to ensure stalled jobs are recovered quickly.
+
+## Decision
+
+We will implement a multi-layered health check strategy for background workers:
+
+1. **Queue Metrics Endpoint**: Expose a protected endpoint `GET /health/queues` that returns the counts (waiting, active, failed) for all critical queues.
+2. **Stalled Job Configuration**: Explicitly configure BullMQ workers with aggressive stall detection settings to recover quickly from crashes.
+3. **Worker Heartbeats**: Workers will periodically update a "heartbeat" key in Redis. The health endpoint will check if this timestamp is recent.
+
+## Implementation
+
+### 1. BullMQ Worker Settings
+
+Workers must be initialized with specific options to handle stalls:
+
+```typescript
+const workerOptions = {
+  // Check for stalled jobs every 30 seconds
+  stalledInterval: 30000,
+  // Fail job after 3 stalls (prevents infinite loops causing infinite retries)
+  maxStalledCount: 3,
+  // Duration of the lock for the job in milliseconds.
+  // If the worker doesn't renew this (e.g. crash), the job stalls.
+  lockDuration: 30000,
+};
+```
+
+### 2. Health Endpoint Logic
+
+The `/health/queues` endpoint will:
+
+1. Iterate through all defined queues (`flyerQueue`, `emailQueue`, etc.).
+2. Fetch job counts (`waiting`, `active`, `failed`, `delayed`).
+3. Return a 200 OK if queues are accessible, or 503 if Redis is unreachable.
+4. (Future) Return 500 if the `waiting` count exceeds a critical threshold for too long.
+
+## Consequences
+
+**Positive**:
+
+- Early detection of stuck processing pipelines.
+- Automatic recovery of stalled jobs via BullMQ configuration.
+- Metrics available for external monitoring tools (e.g., UptimeRobot, Datadog).
+
+**Negative**:
+
+- Requires configuring external monitoring to poll the new endpoint.
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,8 @@
        "@bull-board/api": "^6.14.2",
        "@bull-board/express": "^6.14.2",
        "@google/genai": "^1.30.0",
+        "@sentry/node": "^10.32.1",
+        "@sentry/react": "^10.32.1",
        "@tanstack/react-query": "^5.90.12",
        "@types/connect-timeout": "^1.9.0",
        "bcrypt": "^5.1.1",
@@ -49,7 +51,8 @@
        "swagger-ui-express": "^5.0.1",
        "tsx": "^4.20.6",
        "zod": "^4.2.1",
-        "zxcvbn": "^4.4.2"
+        "zxcvbn": "^4.4.2",
+        "zxing-wasm": "^2.2.4"
      },
      "devDependencies": {
        "@tailwindcss/postcss": "4.1.17",
@@ -187,6 +190,23 @@
        "openapi-types": ">=7"
      }
    },
+    "node_modules/@apm-js-collab/code-transformer": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/@apm-js-collab/code-transformer/-/code-transformer-0.8.2.tgz",
+      "integrity": "sha512-YRjJjNq5KFSjDUoqu5pFUWrrsvGOxl6c3bu+uMFc9HNNptZ2rNU/TI2nLw4jnhQNtka972Ee2m3uqbvDQtPeCA==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@apm-js-collab/tracing-hooks": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@apm-js-collab/tracing-hooks/-/tracing-hooks-0.3.1.tgz",
+      "integrity": "sha512-Vu1CbmPURlN5fTboVuKMoJjbO5qcq9fA5YXpskx3dXe/zTBvjODFoerw+69rVBlRLrJpwPqSDqEuJDEKIrTldw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@apm-js-collab/code-transformer": "^0.8.0",
+        "debug": "^4.4.1",
+        "module-details-from-path": "^1.0.4"
+      }
+    },
    "node_modules/@asamuzakjp/css-color": {
      "version": "4.1.1",
      "resolved": "https://registry.npmjs.org/@asamuzakjp/css-color/-/css-color-4.1.1.tgz",
@@ -3569,6 +3589,524 @@
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      "license": "MIT"
    },
+    "node_modules/@opentelemetry/api": {
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
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+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=8.0.0"
+      }
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+    "node_modules/@opentelemetry/api-logs": {
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+      "resolved": "https://registry.npmjs.org/@opentelemetry/api-logs/-/api-logs-0.208.0.tgz",
+      "integrity": "sha512-CjruKY9V6NMssL/T1kAFgzosF1v9o6oeN+aX5JB/C/xPNtmgIJqcXHG7fA82Ou1zCpWGl4lROQUKwUNE1pMCyg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@opentelemetry/api": "^1.3.0"
+      },
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+    "node_modules/@opentelemetry/context-async-hooks": {
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+      "resolved": "https://registry.npmjs.org/@opentelemetry/context-async-hooks/-/context-async-hooks-2.3.0.tgz",
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@@ -5402,6 +6139,15 @@
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@@ -5531,6 +6276,15 @@
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@@ -5695,6 +6449,15 @@
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@@ -6172,6 +6934,15 @@
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@@ -7391,6 +8162,12 @@
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@@ -9721,6 +10498,12 @@
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@@ -10468,6 +11251,21 @@
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@@ -10648,6 +11446,18 @@
        "url": "https://github.com/sponsors/sindresorhus"
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@@ -12704,6 +13514,12 @@
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@@ -14926,6 +15742,19 @@
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+      "license": "MIT",
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  }
 }
--- a/package.json
+++ b/package.json
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+    "@sentry/node": "^10.32.1",
+    "@sentry/react": "^10.32.1",
    "@tanstack/react-query": "^5.90.12",
    "@types/connect-timeout": "^1.9.0",
    "bcrypt": "^5.1.1",
@@ -69,7 +71,8 @@
    "swagger-ui-express": "^5.0.1",
    "tsx": "^4.20.6",
    "zod": "^4.2.1",
-    "zxcvbn": "^4.4.2"
+    "zxcvbn": "^4.4.2",
+    "zxing-wasm": "^2.2.4"
  },
  "devDependencies": {
    "@tailwindcss/postcss": "4.1.17",
--- a/scripts/test-bugsink.ts
+++ b/scripts/test-bugsink.ts
@@ -0,0 +1,164 @@
+#!/usr/bin/env npx tsx
+/**
+ * Test script to verify Bugsink error tracking is working.
+ *
+ * This script sends test events directly to Bugsink using the Sentry store API.
+ * We use curl/fetch instead of the Sentry SDK because SDK v8+ has strict DSN
+ * validation that rejects HTTP URLs (Bugsink uses HTTP locally).
+ *
+ * Usage:
+ *   npx tsx scripts/test-bugsink.ts
+ *
+ * Or with environment override:
+ *   SENTRY_DSN=http://...@localhost:8000/1 npx tsx scripts/test-bugsink.ts
+ */
+
+// Configuration - parse DSN to extract components
+const DSN =
+  process.env.SENTRY_DSN || 'http://59a58583-e869-7697-f94a-cfa0337676a8@localhost:8000/1';
+const ENVIRONMENT = process.env.SENTRY_ENVIRONMENT || 'test';
+
+// Parse DSN: http://<key>@<host>/<project_id>
+function parseDsn(dsn: string) {
+  const match = dsn.match(/^(https?):\/\/([^@]+)@([^/]+)\/(.+)$/);
+  if (!match) {
+    throw new Error(`Invalid DSN format: ${dsn}`);
+  }
+  return {
+    protocol: match[1],
+    publicKey: match[2],
+    host: match[3],
+    projectId: match[4],
+  };
+}
+
+const dsnParts = parseDsn(DSN);
+const STORE_URL = `${dsnParts.protocol}://${dsnParts.host}/api/${dsnParts.projectId}/store/`;
+
+console.log('='.repeat(60));
+console.log('Bugsink/Sentry Test Script');
+console.log('='.repeat(60));
+console.log(`DSN: ${DSN}`);
+console.log(`Store URL: ${STORE_URL}`);
+console.log(`Public Key: ${dsnParts.publicKey}`);
+console.log(`Environment: ${ENVIRONMENT}`);
+console.log('');
+
+// Generate a UUID for event_id
+function generateEventId(): string {
+  return 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'.replace(/x/g, () =>
+    Math.floor(Math.random() * 16).toString(16),
+  );
+}
+
+// Send an event to Bugsink via the Sentry store API
+async function sendEvent(
+  event: Record<string, unknown>,
+): Promise<{ success: boolean; status: number }> {
+  const response = await fetch(STORE_URL, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      'X-Sentry-Auth': `Sentry sentry_version=7, sentry_client=test-bugsink/1.0, sentry_key=${dsnParts.publicKey}`,
+    },
+    body: JSON.stringify(event),
+  });
+
+  return {
+    success: response.ok,
+    status: response.status,
+  };
+}
+
+async function main() {
+  console.log('[Test] Sending test events to Bugsink...\n');
+
+  try {
+    // Test 1: Send an error event
+    const errorEventId = generateEventId();
+    console.log(`[Test 1] Sending error event (ID: ${errorEventId})...`);
+    const errorEvent = {
+      event_id: errorEventId,
+      timestamp: new Date().toISOString(),
+      platform: 'node',
+      level: 'error',
+      logger: 'test-bugsink.ts',
+      environment: ENVIRONMENT,
+      server_name: 'flyer-crawler-dev',
+      message: 'BugsinkTestError: This is a test error from test-bugsink.ts script',
+      exception: {
+        values: [
+          {
+            type: 'BugsinkTestError',
+            value: 'This is a test error from test-bugsink.ts script',
+            stacktrace: {
+              frames: [
+                {
+                  filename: 'scripts/test-bugsink.ts',
+                  function: 'main',
+                  lineno: 42,
+                  colno: 10,
+                  in_app: true,
+                },
+              ],
+            },
+          },
+        ],
+      },
+      tags: {
+        test: 'true',
+        source: 'test-bugsink.ts',
+      },
+    };
+
+    const errorResult = await sendEvent(errorEvent);
+    console.log(
+      `    Result: ${errorResult.success ? 'SUCCESS' : 'FAILED'} (HTTP ${errorResult.status})`,
+    );
+
+    // Test 2: Send an info message
+    const messageEventId = generateEventId();
+    console.log(`[Test 2] Sending info message (ID: ${messageEventId})...`);
+    const messageEvent = {
+      event_id: messageEventId,
+      timestamp: new Date().toISOString(),
+      platform: 'node',
+      level: 'info',
+      logger: 'test-bugsink.ts',
+      environment: ENVIRONMENT,
+      server_name: 'flyer-crawler-dev',
+      message: 'Test info message from test-bugsink.ts - Bugsink is working!',
+      tags: {
+        test: 'true',
+        source: 'test-bugsink.ts',
+      },
+    };
+
+    const messageResult = await sendEvent(messageEvent);
+    console.log(
+      `    Result: ${messageResult.success ? 'SUCCESS' : 'FAILED'} (HTTP ${messageResult.status})`,
+    );
+
+    // Summary
+    console.log('');
+    console.log('='.repeat(60));
+    if (errorResult.success && messageResult.success) {
+      console.log('SUCCESS! Both test events were accepted by Bugsink.');
+      console.log('');
+      console.log('Check Bugsink UI at http://localhost:8000');
+      console.log('Look for:');
+      console.log('  - BugsinkTestError: "This is a test error..."');
+      console.log('  - Info message: "Test info message from test-bugsink.ts"');
+    } else {
+      console.log('WARNING: Some events may not have been accepted.');
+      console.log('Check that Bugsink is running and the DSN is correct.');
+      process.exit(1);
+    }
+    console.log('='.repeat(60));
+  } catch (error) {
+    console.error('[Test] Failed to send events:', error);
+    process.exit(1);
+  }
+}
+
+main();
--- a/server.ts
+++ b/server.ts
@@ -1,4 +1,12 @@
 // server.ts
+/**
+ * IMPORTANT: Sentry initialization MUST happen before any other imports
+ * to ensure all errors are captured, including those in imported modules.
+ * See ADR-015: Application Performance Monitoring and Error Tracking.
+ */
+import { initSentry, getSentryMiddleware } from './src/services/sentry.server';
+initSentry();
+
 import express, { Request, Response, NextFunction } from 'express';
 import { randomUUID } from 'crypto';
 import helmet from 'helmet';
@@ -7,7 +15,7 @@ import cookieParser from 'cookie-parser';
 import listEndpoints from 'express-list-endpoints';
 import { getPool } from './src/services/db/connection.db';

-import passport from './src/routes/passport.routes';
+import passport from './src/config/passport';
 import { logger } from './src/services/logger.server';

 // Import routers
@@ -24,6 +32,9 @@ import statsRouter from './src/routes/stats.routes';
 import gamificationRouter from './src/routes/gamification.routes';
 import systemRouter from './src/routes/system.routes';
 import healthRouter from './src/routes/health.routes';
+import upcRouter from './src/routes/upc.routes';
+import inventoryRouter from './src/routes/inventory.routes';
+import receiptRouter from './src/routes/receipt.routes';
 import { errorHandler } from './src/middleware/errorHandler';
 import { backgroundJobService, startBackgroundJobs } from './src/services/backgroundJobService';
 import type { UserProfile } from './src/types';
@@ -37,6 +48,7 @@ import {
  gracefulShutdown,
  tokenCleanupQueue,
 } from './src/services/queueService.server';
+import { monitoringService } from './src/services/monitoringService.server';

 // --- START DEBUG LOGGING ---
 // Log the database connection details as seen by the SERVER PROCESS.
@@ -108,9 +120,14 @@ app.use(express.urlencoded({ limit: '100mb', extended: true }));
 app.use(cookieParser()); // Middleware to parse cookies
 app.use(passport.initialize()); // Initialize Passport

+// --- Sentry Request Handler (ADR-015) ---
+// Must be the first middleware after body parsers to capture request data for errors.
+const sentryMiddleware = getSentryMiddleware();
+app.use(sentryMiddleware.requestHandler);
+
 // --- MOCK AUTH FOR TESTING ---
 // This MUST come after passport.initialize() and BEFORE any of the API routes.
-import { mockAuth } from './src/routes/passport.routes';
+import { mockAuth } from './src/config/passport';
 app.use(mockAuth);

 // Add a request timeout middleware. This will help prevent requests from hanging indefinitely.
@@ -215,6 +232,18 @@ if (process.env.NODE_ENV !== 'production') {

 // --- API Routes ---

+// ADR-053: Worker Health Checks
+// Expose queue metrics for monitoring.
+app.get('/api/health/queues', async (req, res) => {
+  try {
+    const statuses = await monitoringService.getQueueStatuses();
+    res.json(statuses);
+  } catch (error) {
+    logger.error({ err: error }, 'Failed to fetch queue statuses');
+    res.status(503).json({ error: 'Failed to fetch queue statuses' });
+  }
+});
+
 // The order of route registration is critical.
 // More specific routes should be registered before more general ones.
 // 1. Authentication routes for login, registration, etc.
@@ -243,9 +272,19 @@ app.use('/api/personalization', personalizationRouter);
 app.use('/api/price-history', priceRouter);
 // 10. Public statistics routes.
 app.use('/api/stats', statsRouter);
+// 11. UPC barcode scanning routes.
+app.use('/api/upc', upcRouter);
+// 12. Inventory and expiry tracking routes.
+app.use('/api/inventory', inventoryRouter);
+// 13. Receipt scanning routes.
+app.use('/api/receipts', receiptRouter);

 // --- Error Handling and Server Startup ---

+// Sentry Error Handler (ADR-015) - captures errors and sends to Bugsink.
+// Must come BEFORE the custom error handler but AFTER all routes.
+app.use(sentryMiddleware.errorHandler);
+
 // Global error handling middleware. This must be the last `app.use()` call.
 app.use(errorHandler);

--- a/sql/initial_schema.sql
+++ b/sql/initial_schema.sql
@@ -1012,3 +1012,232 @@ CREATE INDEX IF NOT EXISTS idx_user_achievements_user_id ON public.user_achievem
 CREATE INDEX IF NOT EXISTS idx_user_achievements_achievement_id ON public.user_achievements(achievement_id);


+-- ============================================================================
+-- UPC SCANNING FEATURE TABLES (59-60)
+-- ============================================================================
+
+-- 59. UPC Scan History - tracks all UPC scans performed by users
+-- This table provides an audit trail and allows users to see their scan history
+CREATE TABLE IF NOT EXISTS public.upc_scan_history (
+    scan_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    upc_code TEXT NOT NULL,
+    product_id BIGINT REFERENCES public.products(product_id) ON DELETE SET NULL,
+    scan_source TEXT NOT NULL,
+    scan_confidence NUMERIC(5,4),
+    raw_image_path TEXT,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT upc_scan_history_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    CONSTRAINT upc_scan_history_scan_source_check CHECK (scan_source IN ('image_upload', 'manual_entry', 'phone_app', 'camera_scan')),
+    CONSTRAINT upc_scan_history_scan_confidence_check CHECK (scan_confidence IS NULL OR (scan_confidence >= 0 AND scan_confidence <= 1))
+);
+COMMENT ON TABLE public.upc_scan_history IS 'Audit trail of all UPC barcode scans performed by users, tracking scan source and results.';
+COMMENT ON COLUMN public.upc_scan_history.upc_code IS 'The scanned UPC/EAN barcode (8-14 digits).';
+COMMENT ON COLUMN public.upc_scan_history.product_id IS 'Reference to the matched product, if found in our database.';
+COMMENT ON COLUMN public.upc_scan_history.scan_source IS 'How the scan was performed: image_upload, manual_entry, phone_app, or camera_scan.';
+COMMENT ON COLUMN public.upc_scan_history.scan_confidence IS 'Confidence score from barcode detection (0.0-1.0), null for manual entry.';
+COMMENT ON COLUMN public.upc_scan_history.raw_image_path IS 'Path to the uploaded barcode image, if applicable.';
+COMMENT ON COLUMN public.upc_scan_history.lookup_successful IS 'Whether the UPC was successfully matched to a product (internal or external).';
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_user_id ON public.upc_scan_history(user_id);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_upc_code ON public.upc_scan_history(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_created_at ON public.upc_scan_history(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_product_id ON public.upc_scan_history(product_id) WHERE product_id IS NOT NULL;
+
+-- 60. UPC External Lookups - cache for external UPC database API responses
+CREATE TABLE IF NOT EXISTS public.upc_external_lookups (
+    lookup_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    upc_code TEXT NOT NULL UNIQUE,
+    product_name TEXT,
+    brand_name TEXT,
+    category TEXT,
+    description TEXT,
+    image_url TEXT,
+    external_source TEXT NOT NULL,
+    lookup_data JSONB,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT upc_external_lookups_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    CONSTRAINT upc_external_lookups_external_source_check CHECK (external_source IN ('openfoodfacts', 'upcitemdb', 'manual', 'unknown')),
+    CONSTRAINT upc_external_lookups_name_check CHECK (NOT lookup_successful OR product_name IS NOT NULL)
+);
+COMMENT ON TABLE public.upc_external_lookups IS 'Cache for external UPC database API responses to reduce API calls and improve lookup speed.';
+COMMENT ON COLUMN public.upc_external_lookups.upc_code IS 'The UPC/EAN barcode that was looked up.';
+COMMENT ON COLUMN public.upc_external_lookups.product_name IS 'Product name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.brand_name IS 'Brand name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.category IS 'Product category returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.description IS 'Product description returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.image_url IS 'Product image URL returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.external_source IS 'Which external API provided this data: openfoodfacts, upcitemdb, manual, unknown.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_data IS 'Full raw JSON response from the external API for reference.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_successful IS 'Whether the external lookup found product information.';
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_upc_code ON public.upc_external_lookups(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_external_source ON public.upc_external_lookups(external_source);
+
+-- Add index to existing products.upc_code for faster lookups
+CREATE INDEX IF NOT EXISTS idx_products_upc_code ON public.products(upc_code) WHERE upc_code IS NOT NULL;
+
+
+-- ============================================================================
+-- EXPIRY DATE TRACKING FEATURE TABLES (61-63)
+-- ============================================================================
+
+-- 61. Expiry Date Ranges - reference table for typical shelf life
+CREATE TABLE IF NOT EXISTS public.expiry_date_ranges (
+    expiry_range_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    master_item_id BIGINT REFERENCES public.master_grocery_items(master_grocery_item_id) ON DELETE CASCADE,
+    category_id BIGINT REFERENCES public.categories(category_id) ON DELETE CASCADE,
+    item_pattern TEXT,
+    storage_location TEXT NOT NULL,
+    min_days INTEGER NOT NULL,
+    max_days INTEGER NOT NULL,
+    typical_days INTEGER NOT NULL,
+    notes TEXT,
+    source TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_date_ranges_storage_location_check CHECK (storage_location IN ('fridge', 'freezer', 'pantry', 'room_temp')),
+    CONSTRAINT expiry_date_ranges_min_days_check CHECK (min_days >= 0),
+    CONSTRAINT expiry_date_ranges_max_days_check CHECK (max_days >= min_days),
+    CONSTRAINT expiry_date_ranges_typical_days_check CHECK (typical_days >= min_days AND typical_days <= max_days),
+    CONSTRAINT expiry_date_ranges_identifier_check CHECK (
+        master_item_id IS NOT NULL OR category_id IS NOT NULL OR item_pattern IS NOT NULL
+    ),
+    CONSTRAINT expiry_date_ranges_source_check CHECK (source IS NULL OR source IN ('usda', 'fda', 'manual', 'community'))
+);
+COMMENT ON TABLE public.expiry_date_ranges IS 'Reference table storing typical shelf life for grocery items based on storage location.';
+COMMENT ON COLUMN public.expiry_date_ranges.master_item_id IS 'Specific item this range applies to (most specific).';
+COMMENT ON COLUMN public.expiry_date_ranges.category_id IS 'Category this range applies to (fallback if no item match).';
+COMMENT ON COLUMN public.expiry_date_ranges.item_pattern IS 'Regex pattern to match item names (fallback if no item/category match).';
+COMMENT ON COLUMN public.expiry_date_ranges.storage_location IS 'Where the item is stored: fridge, freezer, pantry, or room_temp.';
+COMMENT ON COLUMN public.expiry_date_ranges.min_days IS 'Minimum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.max_days IS 'Maximum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.typical_days IS 'Most common/recommended shelf life in days.';
+COMMENT ON COLUMN public.expiry_date_ranges.notes IS 'Additional storage tips or warnings.';
+COMMENT ON COLUMN public.expiry_date_ranges.source IS 'Data source: usda, fda, manual, or community.';
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_master_item_id ON public.expiry_date_ranges(master_item_id) WHERE master_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_category_id ON public.expiry_date_ranges(category_id) WHERE category_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_storage_location ON public.expiry_date_ranges(storage_location);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_item_location
+    ON public.expiry_date_ranges(master_item_id, storage_location)
+    WHERE master_item_id IS NOT NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_category_location
+    ON public.expiry_date_ranges(category_id, storage_location)
+    WHERE category_id IS NOT NULL AND master_item_id IS NULL;
+
+-- 62. Expiry Alerts - user notification preferences for expiry warnings
+CREATE TABLE IF NOT EXISTS public.expiry_alerts (
+    expiry_alert_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    days_before_expiry INTEGER NOT NULL DEFAULT 3,
+    alert_method TEXT NOT NULL,
+    is_enabled BOOLEAN DEFAULT TRUE NOT NULL,
+    last_alert_sent_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_alerts_days_before_check CHECK (days_before_expiry >= 0 AND days_before_expiry <= 30),
+    CONSTRAINT expiry_alerts_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    UNIQUE(user_id, alert_method)
+);
+COMMENT ON TABLE public.expiry_alerts IS 'User preferences for expiry date notifications and alerts.';
+COMMENT ON COLUMN public.expiry_alerts.days_before_expiry IS 'How many days before expiry to send alert (0-30).';
+COMMENT ON COLUMN public.expiry_alerts.alert_method IS 'How to notify: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alerts.is_enabled IS 'Whether this alert type is currently enabled.';
+COMMENT ON COLUMN public.expiry_alerts.last_alert_sent_at IS 'Timestamp of the last alert sent to prevent duplicate notifications.';
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_user_id ON public.expiry_alerts(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_enabled ON public.expiry_alerts(user_id, is_enabled) WHERE is_enabled = TRUE;
+
+-- 63. Expiry Alert Log - tracks sent notifications
+CREATE TABLE IF NOT EXISTS public.expiry_alert_log (
+    alert_log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    pantry_item_id BIGINT REFERENCES public.pantry_items(pantry_item_id) ON DELETE SET NULL,
+    alert_type TEXT NOT NULL,
+    alert_method TEXT NOT NULL,
+    item_name TEXT NOT NULL,
+    expiry_date DATE,
+    days_until_expiry INTEGER,
+    sent_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_alert_log_type_check CHECK (alert_type IN ('expiring_soon', 'expired', 'expiry_reminder')),
+    CONSTRAINT expiry_alert_log_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    CONSTRAINT expiry_alert_log_item_name_check CHECK (TRIM(item_name) <> '')
+);
+COMMENT ON TABLE public.expiry_alert_log IS 'Log of all expiry notifications sent to users for auditing and duplicate prevention.';
+COMMENT ON COLUMN public.expiry_alert_log.pantry_item_id IS 'The pantry item that triggered the alert (may be null if item deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.alert_type IS 'Type of alert: expiring_soon, expired, or expiry_reminder.';
+COMMENT ON COLUMN public.expiry_alert_log.alert_method IS 'How the alert was sent: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alert_log.item_name IS 'Snapshot of item name at time of alert (in case item is deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.expiry_date IS 'The expiry date that triggered the alert.';
+COMMENT ON COLUMN public.expiry_alert_log.days_until_expiry IS 'Days until expiry at time alert was sent (negative = expired).';
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_user_id ON public.expiry_alert_log(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_pantry_item_id ON public.expiry_alert_log(pantry_item_id) WHERE pantry_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_sent_at ON public.expiry_alert_log(sent_at DESC);
+
+
+-- ============================================================================
+-- RECEIPT SCANNING ENHANCEMENT TABLES (64-65)
+-- ============================================================================
+
+-- 64. Receipt Processing Log - track OCR/AI processing attempts
+CREATE TABLE IF NOT EXISTS public.receipt_processing_log (
+    log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    receipt_id BIGINT NOT NULL REFERENCES public.receipts(receipt_id) ON DELETE CASCADE,
+    processing_step TEXT NOT NULL,
+    status TEXT NOT NULL,
+    provider TEXT,
+    duration_ms INTEGER,
+    tokens_used INTEGER,
+    cost_cents INTEGER,
+    input_data JSONB,
+    output_data JSONB,
+    error_message TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT receipt_processing_log_step_check CHECK (processing_step IN (
+        'upload', 'ocr_extraction', 'text_parsing', 'store_detection',
+        'item_extraction', 'item_matching', 'price_parsing', 'finalization'
+    )),
+    CONSTRAINT receipt_processing_log_status_check CHECK (status IN ('started', 'completed', 'failed', 'skipped')),
+    CONSTRAINT receipt_processing_log_provider_check CHECK (provider IS NULL OR provider IN (
+        'tesseract', 'openai', 'anthropic', 'google_vision', 'aws_textract', 'internal'
+    ))
+);
+COMMENT ON TABLE public.receipt_processing_log IS 'Detailed log of each processing step for receipts, useful for debugging and cost tracking.';
+COMMENT ON COLUMN public.receipt_processing_log.processing_step IS 'Which processing step this log entry is for.';
+COMMENT ON COLUMN public.receipt_processing_log.status IS 'Status of this step: started, completed, failed, skipped.';
+COMMENT ON COLUMN public.receipt_processing_log.provider IS 'External service used: tesseract, openai, anthropic, etc.';
+COMMENT ON COLUMN public.receipt_processing_log.duration_ms IS 'How long this step took in milliseconds.';
+COMMENT ON COLUMN public.receipt_processing_log.tokens_used IS 'Number of API tokens used (for LLM providers).';
+COMMENT ON COLUMN public.receipt_processing_log.cost_cents IS 'Estimated cost in cents for this processing step.';
+COMMENT ON COLUMN public.receipt_processing_log.input_data IS 'Input data sent to the processing step (for debugging).';
+COMMENT ON COLUMN public.receipt_processing_log.output_data IS 'Output data received from the processing step.';
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_receipt_id ON public.receipt_processing_log(receipt_id);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_step_status ON public.receipt_processing_log(processing_step, status);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_created_at ON public.receipt_processing_log(created_at DESC);
+
+-- 65. Store-specific receipt patterns - help identify stores from receipt text
+CREATE TABLE IF NOT EXISTS public.store_receipt_patterns (
+    pattern_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    store_id BIGINT NOT NULL REFERENCES public.stores(store_id) ON DELETE CASCADE,
+    pattern_type TEXT NOT NULL,
+    pattern_value TEXT NOT NULL,
+    priority INTEGER DEFAULT 0,
+    is_active BOOLEAN DEFAULT TRUE,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT store_receipt_patterns_type_check CHECK (pattern_type IN (
+        'header_regex', 'footer_regex', 'phone_number', 'address_fragment', 'store_number_format'
+    )),
+    CONSTRAINT store_receipt_patterns_value_check CHECK (TRIM(pattern_value) <> ''),
+    UNIQUE(store_id, pattern_type, pattern_value)
+);
+COMMENT ON TABLE public.store_receipt_patterns IS 'Patterns to help identify stores from receipt text and format.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_type IS 'Type of pattern: header_regex, footer_regex, phone_number, etc.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_value IS 'The actual pattern (regex or literal text).';
+COMMENT ON COLUMN public.store_receipt_patterns.priority IS 'Higher priority patterns are checked first.';
+COMMENT ON COLUMN public.store_receipt_patterns.is_active IS 'Whether this pattern is currently in use.';
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_store_id ON public.store_receipt_patterns(store_id);
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_active ON public.store_receipt_patterns(pattern_type, is_active, priority DESC)
+    WHERE is_active = TRUE;
+
--- a/sql/master_schema_rollup.sql
+++ b/sql/master_schema_rollup.sql
@@ -1033,6 +1033,235 @@ CREATE INDEX IF NOT EXISTS idx_user_achievements_user_id ON public.user_achievem
 CREATE INDEX IF NOT EXISTS idx_user_achievements_achievement_id ON public.user_achievements(achievement_id);


+-- ============================================================================
+-- UPC SCANNING FEATURE TABLES (59-60)
+-- ============================================================================
+
+-- 59. UPC Scan History - tracks all UPC scans performed by users
+-- This table provides an audit trail and allows users to see their scan history
+CREATE TABLE IF NOT EXISTS public.upc_scan_history (
+    scan_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    upc_code TEXT NOT NULL,
+    product_id BIGINT REFERENCES public.products(product_id) ON DELETE SET NULL,
+    scan_source TEXT NOT NULL,
+    scan_confidence NUMERIC(5,4),
+    raw_image_path TEXT,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT upc_scan_history_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    CONSTRAINT upc_scan_history_scan_source_check CHECK (scan_source IN ('image_upload', 'manual_entry', 'phone_app', 'camera_scan')),
+    CONSTRAINT upc_scan_history_scan_confidence_check CHECK (scan_confidence IS NULL OR (scan_confidence >= 0 AND scan_confidence <= 1))
+);
+COMMENT ON TABLE public.upc_scan_history IS 'Audit trail of all UPC barcode scans performed by users, tracking scan source and results.';
+COMMENT ON COLUMN public.upc_scan_history.upc_code IS 'The scanned UPC/EAN barcode (8-14 digits).';
+COMMENT ON COLUMN public.upc_scan_history.product_id IS 'Reference to the matched product, if found in our database.';
+COMMENT ON COLUMN public.upc_scan_history.scan_source IS 'How the scan was performed: image_upload, manual_entry, phone_app, or camera_scan.';
+COMMENT ON COLUMN public.upc_scan_history.scan_confidence IS 'Confidence score from barcode detection (0.0-1.0), null for manual entry.';
+COMMENT ON COLUMN public.upc_scan_history.raw_image_path IS 'Path to the uploaded barcode image, if applicable.';
+COMMENT ON COLUMN public.upc_scan_history.lookup_successful IS 'Whether the UPC was successfully matched to a product (internal or external).';
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_user_id ON public.upc_scan_history(user_id);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_upc_code ON public.upc_scan_history(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_created_at ON public.upc_scan_history(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_product_id ON public.upc_scan_history(product_id) WHERE product_id IS NOT NULL;
+
+-- 60. UPC External Lookups - cache for external UPC database API responses
+CREATE TABLE IF NOT EXISTS public.upc_external_lookups (
+    lookup_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    upc_code TEXT NOT NULL UNIQUE,
+    product_name TEXT,
+    brand_name TEXT,
+    category TEXT,
+    description TEXT,
+    image_url TEXT,
+    external_source TEXT NOT NULL,
+    lookup_data JSONB,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT upc_external_lookups_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    CONSTRAINT upc_external_lookups_external_source_check CHECK (external_source IN ('openfoodfacts', 'upcitemdb', 'manual', 'unknown')),
+    CONSTRAINT upc_external_lookups_name_check CHECK (NOT lookup_successful OR product_name IS NOT NULL)
+);
+COMMENT ON TABLE public.upc_external_lookups IS 'Cache for external UPC database API responses to reduce API calls and improve lookup speed.';
+COMMENT ON COLUMN public.upc_external_lookups.upc_code IS 'The UPC/EAN barcode that was looked up.';
+COMMENT ON COLUMN public.upc_external_lookups.product_name IS 'Product name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.brand_name IS 'Brand name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.category IS 'Product category returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.description IS 'Product description returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.image_url IS 'Product image URL returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.external_source IS 'Which external API provided this data: openfoodfacts, upcitemdb, manual, unknown.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_data IS 'Full raw JSON response from the external API for reference.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_successful IS 'Whether the external lookup found product information.';
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_upc_code ON public.upc_external_lookups(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_external_source ON public.upc_external_lookups(external_source);
+
+-- Add index to existing products.upc_code for faster lookups
+CREATE INDEX IF NOT EXISTS idx_products_upc_code ON public.products(upc_code) WHERE upc_code IS NOT NULL;
+
+
+-- ============================================================================
+-- EXPIRY DATE TRACKING FEATURE TABLES (61-63)
+-- ============================================================================
+
+-- 61. Expiry Date Ranges - reference table for typical shelf life
+CREATE TABLE IF NOT EXISTS public.expiry_date_ranges (
+    expiry_range_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    master_item_id BIGINT REFERENCES public.master_grocery_items(master_grocery_item_id) ON DELETE CASCADE,
+    category_id BIGINT REFERENCES public.categories(category_id) ON DELETE CASCADE,
+    item_pattern TEXT,
+    storage_location TEXT NOT NULL,
+    min_days INTEGER NOT NULL,
+    max_days INTEGER NOT NULL,
+    typical_days INTEGER NOT NULL,
+    notes TEXT,
+    source TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_date_ranges_storage_location_check CHECK (storage_location IN ('fridge', 'freezer', 'pantry', 'room_temp')),
+    CONSTRAINT expiry_date_ranges_min_days_check CHECK (min_days >= 0),
+    CONSTRAINT expiry_date_ranges_max_days_check CHECK (max_days >= min_days),
+    CONSTRAINT expiry_date_ranges_typical_days_check CHECK (typical_days >= min_days AND typical_days <= max_days),
+    CONSTRAINT expiry_date_ranges_identifier_check CHECK (
+        master_item_id IS NOT NULL OR category_id IS NOT NULL OR item_pattern IS NOT NULL
+    ),
+    CONSTRAINT expiry_date_ranges_source_check CHECK (source IS NULL OR source IN ('usda', 'fda', 'manual', 'community'))
+);
+COMMENT ON TABLE public.expiry_date_ranges IS 'Reference table storing typical shelf life for grocery items based on storage location.';
+COMMENT ON COLUMN public.expiry_date_ranges.master_item_id IS 'Specific item this range applies to (most specific).';
+COMMENT ON COLUMN public.expiry_date_ranges.category_id IS 'Category this range applies to (fallback if no item match).';
+COMMENT ON COLUMN public.expiry_date_ranges.item_pattern IS 'Regex pattern to match item names (fallback if no item/category match).';
+COMMENT ON COLUMN public.expiry_date_ranges.storage_location IS 'Where the item is stored: fridge, freezer, pantry, or room_temp.';
+COMMENT ON COLUMN public.expiry_date_ranges.min_days IS 'Minimum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.max_days IS 'Maximum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.typical_days IS 'Most common/recommended shelf life in days.';
+COMMENT ON COLUMN public.expiry_date_ranges.notes IS 'Additional storage tips or warnings.';
+COMMENT ON COLUMN public.expiry_date_ranges.source IS 'Data source: usda, fda, manual, or community.';
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_master_item_id ON public.expiry_date_ranges(master_item_id) WHERE master_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_category_id ON public.expiry_date_ranges(category_id) WHERE category_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_storage_location ON public.expiry_date_ranges(storage_location);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_item_location
+    ON public.expiry_date_ranges(master_item_id, storage_location)
+    WHERE master_item_id IS NOT NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_category_location
+    ON public.expiry_date_ranges(category_id, storage_location)
+    WHERE category_id IS NOT NULL AND master_item_id IS NULL;
+
+-- 62. Expiry Alerts - user notification preferences for expiry warnings
+CREATE TABLE IF NOT EXISTS public.expiry_alerts (
+    expiry_alert_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    days_before_expiry INTEGER NOT NULL DEFAULT 3,
+    alert_method TEXT NOT NULL,
+    is_enabled BOOLEAN DEFAULT TRUE NOT NULL,
+    last_alert_sent_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_alerts_days_before_check CHECK (days_before_expiry >= 0 AND days_before_expiry <= 30),
+    CONSTRAINT expiry_alerts_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    UNIQUE(user_id, alert_method)
+);
+COMMENT ON TABLE public.expiry_alerts IS 'User preferences for expiry date notifications and alerts.';
+COMMENT ON COLUMN public.expiry_alerts.days_before_expiry IS 'How many days before expiry to send alert (0-30).';
+COMMENT ON COLUMN public.expiry_alerts.alert_method IS 'How to notify: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alerts.is_enabled IS 'Whether this alert type is currently enabled.';
+COMMENT ON COLUMN public.expiry_alerts.last_alert_sent_at IS 'Timestamp of the last alert sent to prevent duplicate notifications.';
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_user_id ON public.expiry_alerts(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_enabled ON public.expiry_alerts(user_id, is_enabled) WHERE is_enabled = TRUE;
+
+-- 63. Expiry Alert Log - tracks sent notifications
+CREATE TABLE IF NOT EXISTS public.expiry_alert_log (
+    alert_log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    pantry_item_id BIGINT REFERENCES public.pantry_items(pantry_item_id) ON DELETE SET NULL,
+    alert_type TEXT NOT NULL,
+    alert_method TEXT NOT NULL,
+    item_name TEXT NOT NULL,
+    expiry_date DATE,
+    days_until_expiry INTEGER,
+    sent_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT expiry_alert_log_type_check CHECK (alert_type IN ('expiring_soon', 'expired', 'expiry_reminder')),
+    CONSTRAINT expiry_alert_log_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    CONSTRAINT expiry_alert_log_item_name_check CHECK (TRIM(item_name) <> '')
+);
+COMMENT ON TABLE public.expiry_alert_log IS 'Log of all expiry notifications sent to users for auditing and duplicate prevention.';
+COMMENT ON COLUMN public.expiry_alert_log.pantry_item_id IS 'The pantry item that triggered the alert (may be null if item deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.alert_type IS 'Type of alert: expiring_soon, expired, or expiry_reminder.';
+COMMENT ON COLUMN public.expiry_alert_log.alert_method IS 'How the alert was sent: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alert_log.item_name IS 'Snapshot of item name at time of alert (in case item is deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.expiry_date IS 'The expiry date that triggered the alert.';
+COMMENT ON COLUMN public.expiry_alert_log.days_until_expiry IS 'Days until expiry at time alert was sent (negative = expired).';
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_user_id ON public.expiry_alert_log(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_pantry_item_id ON public.expiry_alert_log(pantry_item_id) WHERE pantry_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_sent_at ON public.expiry_alert_log(sent_at DESC);
+
+
+-- ============================================================================
+-- RECEIPT SCANNING ENHANCEMENT TABLES (64-65)
+-- ============================================================================
+
+-- 64. Receipt Processing Log - track OCR/AI processing attempts
+CREATE TABLE IF NOT EXISTS public.receipt_processing_log (
+    log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    receipt_id BIGINT NOT NULL REFERENCES public.receipts(receipt_id) ON DELETE CASCADE,
+    processing_step TEXT NOT NULL,
+    status TEXT NOT NULL,
+    provider TEXT,
+    duration_ms INTEGER,
+    tokens_used INTEGER,
+    cost_cents INTEGER,
+    input_data JSONB,
+    output_data JSONB,
+    error_message TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT receipt_processing_log_step_check CHECK (processing_step IN (
+        'upload', 'ocr_extraction', 'text_parsing', 'store_detection',
+        'item_extraction', 'item_matching', 'price_parsing', 'finalization'
+    )),
+    CONSTRAINT receipt_processing_log_status_check CHECK (status IN ('started', 'completed', 'failed', 'skipped')),
+    CONSTRAINT receipt_processing_log_provider_check CHECK (provider IS NULL OR provider IN (
+        'tesseract', 'openai', 'anthropic', 'google_vision', 'aws_textract', 'internal'
+    ))
+);
+COMMENT ON TABLE public.receipt_processing_log IS 'Detailed log of each processing step for receipts, useful for debugging and cost tracking.';
+COMMENT ON COLUMN public.receipt_processing_log.processing_step IS 'Which processing step this log entry is for.';
+COMMENT ON COLUMN public.receipt_processing_log.status IS 'Status of this step: started, completed, failed, skipped.';
+COMMENT ON COLUMN public.receipt_processing_log.provider IS 'External service used: tesseract, openai, anthropic, etc.';
+COMMENT ON COLUMN public.receipt_processing_log.duration_ms IS 'How long this step took in milliseconds.';
+COMMENT ON COLUMN public.receipt_processing_log.tokens_used IS 'Number of API tokens used (for LLM providers).';
+COMMENT ON COLUMN public.receipt_processing_log.cost_cents IS 'Estimated cost in cents for this processing step.';
+COMMENT ON COLUMN public.receipt_processing_log.input_data IS 'Input data sent to the processing step (for debugging).';
+COMMENT ON COLUMN public.receipt_processing_log.output_data IS 'Output data received from the processing step.';
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_receipt_id ON public.receipt_processing_log(receipt_id);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_step_status ON public.receipt_processing_log(processing_step, status);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_created_at ON public.receipt_processing_log(created_at DESC);
+
+-- 65. Store-specific receipt patterns - help identify stores from receipt text
+CREATE TABLE IF NOT EXISTS public.store_receipt_patterns (
+    pattern_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    store_id BIGINT NOT NULL REFERENCES public.stores(store_id) ON DELETE CASCADE,
+    pattern_type TEXT NOT NULL,
+    pattern_value TEXT NOT NULL,
+    priority INTEGER DEFAULT 0,
+    is_active BOOLEAN DEFAULT TRUE,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    CONSTRAINT store_receipt_patterns_type_check CHECK (pattern_type IN (
+        'header_regex', 'footer_regex', 'phone_number', 'address_fragment', 'store_number_format'
+    )),
+    CONSTRAINT store_receipt_patterns_value_check CHECK (TRIM(pattern_value) <> ''),
+    UNIQUE(store_id, pattern_type, pattern_value)
+);
+COMMENT ON TABLE public.store_receipt_patterns IS 'Patterns to help identify stores from receipt text and format.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_type IS 'Type of pattern: header_regex, footer_regex, phone_number, etc.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_value IS 'The actual pattern (regex or literal text).';
+COMMENT ON COLUMN public.store_receipt_patterns.priority IS 'Higher priority patterns are checked first.';
+COMMENT ON COLUMN public.store_receipt_patterns.is_active IS 'Whether this pattern is currently in use.';
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_store_id ON public.store_receipt_patterns(store_id);
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_active ON public.store_receipt_patterns(pattern_type, is_active, priority DESC)
+    WHERE is_active = TRUE;
+

 -- ============================================================================
 -- PART 2: DATA SEEDING
--- a/sql/migrations/001_upc_scanning.sql
+++ b/sql/migrations/001_upc_scanning.sql
@@ -0,0 +1,90 @@
+-- sql/migrations/001_upc_scanning.sql
+-- ============================================================================
+-- UPC SCANNING FEATURE MIGRATION
+-- ============================================================================
+-- Purpose:
+-- This migration adds tables to support UPC barcode scanning functionality:
+-- 1. upc_scan_history - Audit trail of all UPC scans performed by users
+-- 2. upc_external_lookups - Cache for external UPC database API responses
+--
+-- The products.upc_code column already exists in the schema.
+-- These tables extend the functionality to track scans and cache lookups.
+-- ============================================================================
+
+-- 1. UPC Scan History - tracks all UPC scans performed by users
+-- This table provides an audit trail and allows users to see their scan history
+CREATE TABLE IF NOT EXISTS public.upc_scan_history (
+    scan_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    upc_code TEXT NOT NULL,
+    product_id BIGINT REFERENCES public.products(product_id) ON DELETE SET NULL,
+    scan_source TEXT NOT NULL,
+    scan_confidence NUMERIC(5,4),
+    raw_image_path TEXT,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate UPC code format (8-14 digits for UPC-A, UPC-E, EAN-8, EAN-13, etc.)
+    CONSTRAINT upc_scan_history_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    -- Validate scan source is one of the allowed values
+    CONSTRAINT upc_scan_history_scan_source_check CHECK (scan_source IN ('image_upload', 'manual_entry', 'phone_app', 'camera_scan')),
+    -- Confidence score must be between 0 and 1 if provided
+    CONSTRAINT upc_scan_history_scan_confidence_check CHECK (scan_confidence IS NULL OR (scan_confidence >= 0 AND scan_confidence <= 1))
+);
+COMMENT ON TABLE public.upc_scan_history IS 'Audit trail of all UPC barcode scans performed by users, tracking scan source and results.';
+COMMENT ON COLUMN public.upc_scan_history.upc_code IS 'The scanned UPC/EAN barcode (8-14 digits).';
+COMMENT ON COLUMN public.upc_scan_history.product_id IS 'Reference to the matched product, if found in our database.';
+COMMENT ON COLUMN public.upc_scan_history.scan_source IS 'How the scan was performed: image_upload, manual_entry, phone_app, or camera_scan.';
+COMMENT ON COLUMN public.upc_scan_history.scan_confidence IS 'Confidence score from barcode detection (0.0-1.0), null for manual entry.';
+COMMENT ON COLUMN public.upc_scan_history.raw_image_path IS 'Path to the uploaded barcode image, if applicable.';
+COMMENT ON COLUMN public.upc_scan_history.lookup_successful IS 'Whether the UPC was successfully matched to a product (internal or external).';
+
+-- Indexes for upc_scan_history
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_user_id ON public.upc_scan_history(user_id);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_upc_code ON public.upc_scan_history(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_created_at ON public.upc_scan_history(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_upc_scan_history_product_id ON public.upc_scan_history(product_id) WHERE product_id IS NOT NULL;
+
+
+-- 2. UPC External Lookups - cache for external UPC database API responses
+-- This table caches results from external UPC databases (OpenFoodFacts, UPC Item DB, etc.)
+-- to reduce API calls and improve response times for repeated lookups
+CREATE TABLE IF NOT EXISTS public.upc_external_lookups (
+    lookup_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    upc_code TEXT NOT NULL UNIQUE,
+    product_name TEXT,
+    brand_name TEXT,
+    category TEXT,
+    description TEXT,
+    image_url TEXT,
+    external_source TEXT NOT NULL,
+    lookup_data JSONB,
+    lookup_successful BOOLEAN DEFAULT FALSE NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate UPC code format
+    CONSTRAINT upc_external_lookups_upc_code_check CHECK (upc_code ~ '^[0-9]{8,14}$'),
+    -- Validate external source is one of the supported APIs
+    CONSTRAINT upc_external_lookups_external_source_check CHECK (external_source IN ('openfoodfacts', 'upcitemdb', 'manual', 'unknown')),
+    -- If lookup was successful, product_name should be present
+    CONSTRAINT upc_external_lookups_name_check CHECK (NOT lookup_successful OR product_name IS NOT NULL)
+);
+COMMENT ON TABLE public.upc_external_lookups IS 'Cache for external UPC database API responses to reduce API calls and improve lookup speed.';
+COMMENT ON COLUMN public.upc_external_lookups.upc_code IS 'The UPC/EAN barcode that was looked up.';
+COMMENT ON COLUMN public.upc_external_lookups.product_name IS 'Product name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.brand_name IS 'Brand name returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.category IS 'Product category returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.description IS 'Product description returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.image_url IS 'Product image URL returned from external API.';
+COMMENT ON COLUMN public.upc_external_lookups.external_source IS 'Which external API provided this data: openfoodfacts, upcitemdb, manual, unknown.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_data IS 'Full raw JSON response from the external API for reference.';
+COMMENT ON COLUMN public.upc_external_lookups.lookup_successful IS 'Whether the external lookup found product information.';
+
+-- Index for upc_external_lookups
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_upc_code ON public.upc_external_lookups(upc_code);
+CREATE INDEX IF NOT EXISTS idx_upc_external_lookups_external_source ON public.upc_external_lookups(external_source);
+
+
+-- 3. Add index to existing products.upc_code if not exists
+-- This speeds up lookups when matching scanned UPCs to existing products
+CREATE INDEX IF NOT EXISTS idx_products_upc_code ON public.products(upc_code) WHERE upc_code IS NOT NULL;
--- a/sql/migrations/002_expiry_tracking.sql
+++ b/sql/migrations/002_expiry_tracking.sql
@@ -0,0 +1,189 @@
+-- sql/migrations/002_expiry_tracking.sql
+-- ============================================================================
+-- EXPIRY DATE TRACKING FEATURE MIGRATION
+-- ============================================================================
+-- Purpose:
+-- This migration adds tables and enhancements for expiry date tracking:
+-- 1. expiry_date_ranges - Reference table for typical shelf life by item/category
+-- 2. expiry_alerts - User notification preferences for expiry warnings
+-- 3. Enhancements to pantry_items for better expiry tracking
+--
+-- Existing tables used:
+-- - pantry_items (already has best_before_date)
+-- - pantry_locations (already exists for fridge/freezer/pantry)
+-- - receipts and receipt_items (already exist for receipt scanning)
+-- ============================================================================
+
+-- 1. Expiry Date Ranges - reference table for typical shelf life
+-- This table stores expected shelf life for items based on storage location
+-- Used to auto-calculate expiry dates when users add items to inventory
+CREATE TABLE IF NOT EXISTS public.expiry_date_ranges (
+    expiry_range_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    master_item_id BIGINT REFERENCES public.master_grocery_items(master_grocery_item_id) ON DELETE CASCADE,
+    category_id BIGINT REFERENCES public.categories(category_id) ON DELETE CASCADE,
+    item_pattern TEXT,
+    storage_location TEXT NOT NULL,
+    min_days INTEGER NOT NULL,
+    max_days INTEGER NOT NULL,
+    typical_days INTEGER NOT NULL,
+    notes TEXT,
+    source TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate storage location is one of the allowed values
+    CONSTRAINT expiry_date_ranges_storage_location_check CHECK (storage_location IN ('fridge', 'freezer', 'pantry', 'room_temp')),
+    -- Validate day ranges are logical
+    CONSTRAINT expiry_date_ranges_min_days_check CHECK (min_days >= 0),
+    CONSTRAINT expiry_date_ranges_max_days_check CHECK (max_days >= min_days),
+    CONSTRAINT expiry_date_ranges_typical_days_check CHECK (typical_days >= min_days AND typical_days <= max_days),
+    -- At least one identifier must be present
+    CONSTRAINT expiry_date_ranges_identifier_check CHECK (
+        master_item_id IS NOT NULL OR category_id IS NOT NULL OR item_pattern IS NOT NULL
+    ),
+    -- Validate source is one of the known sources
+    CONSTRAINT expiry_date_ranges_source_check CHECK (source IS NULL OR source IN ('usda', 'fda', 'manual', 'community'))
+);
+COMMENT ON TABLE public.expiry_date_ranges IS 'Reference table storing typical shelf life for grocery items based on storage location.';
+COMMENT ON COLUMN public.expiry_date_ranges.master_item_id IS 'Specific item this range applies to (most specific).';
+COMMENT ON COLUMN public.expiry_date_ranges.category_id IS 'Category this range applies to (fallback if no item match).';
+COMMENT ON COLUMN public.expiry_date_ranges.item_pattern IS 'Regex pattern to match item names (fallback if no item/category match).';
+COMMENT ON COLUMN public.expiry_date_ranges.storage_location IS 'Where the item is stored: fridge, freezer, pantry, or room_temp.';
+COMMENT ON COLUMN public.expiry_date_ranges.min_days IS 'Minimum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.max_days IS 'Maximum shelf life in days under proper storage.';
+COMMENT ON COLUMN public.expiry_date_ranges.typical_days IS 'Most common/recommended shelf life in days.';
+COMMENT ON COLUMN public.expiry_date_ranges.notes IS 'Additional storage tips or warnings.';
+COMMENT ON COLUMN public.expiry_date_ranges.source IS 'Data source: usda, fda, manual, or community.';
+
+-- Indexes for expiry_date_ranges
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_master_item_id ON public.expiry_date_ranges(master_item_id) WHERE master_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_category_id ON public.expiry_date_ranges(category_id) WHERE category_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_date_ranges_storage_location ON public.expiry_date_ranges(storage_location);
+
+-- Unique constraint to prevent duplicate entries for same item/location combo
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_item_location
+    ON public.expiry_date_ranges(master_item_id, storage_location)
+    WHERE master_item_id IS NOT NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS idx_expiry_date_ranges_unique_category_location
+    ON public.expiry_date_ranges(category_id, storage_location)
+    WHERE category_id IS NOT NULL AND master_item_id IS NULL;
+
+
+-- 2. Expiry Alerts - user notification preferences for expiry warnings
+-- This table stores user preferences for when and how to receive expiry notifications
+CREATE TABLE IF NOT EXISTS public.expiry_alerts (
+    expiry_alert_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    days_before_expiry INTEGER NOT NULL DEFAULT 3,
+    alert_method TEXT NOT NULL,
+    is_enabled BOOLEAN DEFAULT TRUE NOT NULL,
+    last_alert_sent_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate days before expiry is reasonable
+    CONSTRAINT expiry_alerts_days_before_check CHECK (days_before_expiry >= 0 AND days_before_expiry <= 30),
+    -- Validate alert method is one of the allowed values
+    CONSTRAINT expiry_alerts_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    -- Each user can only have one setting per alert method
+    UNIQUE(user_id, alert_method)
+);
+COMMENT ON TABLE public.expiry_alerts IS 'User preferences for expiry date notifications and alerts.';
+COMMENT ON COLUMN public.expiry_alerts.days_before_expiry IS 'How many days before expiry to send alert (0-30).';
+COMMENT ON COLUMN public.expiry_alerts.alert_method IS 'How to notify: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alerts.is_enabled IS 'Whether this alert type is currently enabled.';
+COMMENT ON COLUMN public.expiry_alerts.last_alert_sent_at IS 'Timestamp of the last alert sent to prevent duplicate notifications.';
+
+-- Indexes for expiry_alerts
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_user_id ON public.expiry_alerts(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alerts_enabled ON public.expiry_alerts(user_id, is_enabled) WHERE is_enabled = TRUE;
+
+
+-- 3. Expiry Alert Log - tracks sent notifications (for auditing and preventing duplicates)
+CREATE TABLE IF NOT EXISTS public.expiry_alert_log (
+    alert_log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    user_id UUID NOT NULL REFERENCES public.users(user_id) ON DELETE CASCADE,
+    pantry_item_id BIGINT REFERENCES public.pantry_items(pantry_item_id) ON DELETE SET NULL,
+    alert_type TEXT NOT NULL,
+    alert_method TEXT NOT NULL,
+    item_name TEXT NOT NULL,
+    expiry_date DATE,
+    days_until_expiry INTEGER,
+    sent_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate alert type
+    CONSTRAINT expiry_alert_log_type_check CHECK (alert_type IN ('expiring_soon', 'expired', 'expiry_reminder')),
+    -- Validate alert method
+    CONSTRAINT expiry_alert_log_method_check CHECK (alert_method IN ('email', 'push', 'in_app')),
+    -- Validate item_name is not empty
+    CONSTRAINT expiry_alert_log_item_name_check CHECK (TRIM(item_name) <> '')
+);
+COMMENT ON TABLE public.expiry_alert_log IS 'Log of all expiry notifications sent to users for auditing and duplicate prevention.';
+COMMENT ON COLUMN public.expiry_alert_log.pantry_item_id IS 'The pantry item that triggered the alert (may be null if item deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.alert_type IS 'Type of alert: expiring_soon, expired, or expiry_reminder.';
+COMMENT ON COLUMN public.expiry_alert_log.alert_method IS 'How the alert was sent: email, push, or in_app.';
+COMMENT ON COLUMN public.expiry_alert_log.item_name IS 'Snapshot of item name at time of alert (in case item is deleted).';
+COMMENT ON COLUMN public.expiry_alert_log.expiry_date IS 'The expiry date that triggered the alert.';
+COMMENT ON COLUMN public.expiry_alert_log.days_until_expiry IS 'Days until expiry at time alert was sent (negative = expired).';
+
+-- Indexes for expiry_alert_log
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_user_id ON public.expiry_alert_log(user_id);
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_pantry_item_id ON public.expiry_alert_log(pantry_item_id) WHERE pantry_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_expiry_alert_log_sent_at ON public.expiry_alert_log(sent_at DESC);
+
+
+-- 4. Enhancements to pantry_items table
+-- Add columns to better support expiry tracking from receipts and UPC scans
+
+-- Add purchase_date column to track when item was bought
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS purchase_date DATE;
+COMMENT ON COLUMN public.pantry_items.purchase_date IS 'Date the item was purchased (from receipt or manual entry).';
+
+-- Add source column to track how item was added
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS source TEXT DEFAULT 'manual';
+-- Note: Cannot add CHECK constraint via ALTER in PostgreSQL, will validate in application
+
+-- Add receipt_item_id to link back to receipt if added from receipt scan
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS receipt_item_id BIGINT REFERENCES public.receipt_items(receipt_item_id) ON DELETE SET NULL;
+COMMENT ON COLUMN public.pantry_items.receipt_item_id IS 'Link to receipt_items if this pantry item was created from a receipt scan.';
+
+-- Add product_id to link to specific product if known from UPC scan
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS product_id BIGINT REFERENCES public.products(product_id) ON DELETE SET NULL;
+COMMENT ON COLUMN public.pantry_items.product_id IS 'Link to products if this pantry item was created from a UPC scan.';
+
+-- Add expiry_source to track how expiry date was determined
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS expiry_source TEXT;
+COMMENT ON COLUMN public.pantry_items.expiry_source IS 'How expiry was determined: manual, calculated, package, receipt.';
+
+-- Add is_consumed column if not exists (check for existing)
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS is_consumed BOOLEAN DEFAULT FALSE;
+COMMENT ON COLUMN public.pantry_items.is_consumed IS 'Whether the item has been fully consumed.';
+
+-- Add consumed_at timestamp
+ALTER TABLE public.pantry_items
+    ADD COLUMN IF NOT EXISTS consumed_at TIMESTAMPTZ;
+COMMENT ON COLUMN public.pantry_items.consumed_at IS 'When the item was marked as consumed.';
+
+-- New indexes for pantry_items expiry queries
+CREATE INDEX IF NOT EXISTS idx_pantry_items_best_before_date ON public.pantry_items(best_before_date)
+    WHERE best_before_date IS NOT NULL AND (is_consumed IS NULL OR is_consumed = FALSE);
+CREATE INDEX IF NOT EXISTS idx_pantry_items_expiring_soon ON public.pantry_items(user_id, best_before_date)
+    WHERE best_before_date IS NOT NULL AND (is_consumed IS NULL OR is_consumed = FALSE);
+CREATE INDEX IF NOT EXISTS idx_pantry_items_receipt_item_id ON public.pantry_items(receipt_item_id)
+    WHERE receipt_item_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_pantry_items_product_id ON public.pantry_items(product_id)
+    WHERE product_id IS NOT NULL;
+
+
+-- 5. Add UPC scan support to receipt_items table
+-- When receipt items are matched via UPC, store the reference
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS upc_code TEXT;
+COMMENT ON COLUMN public.receipt_items.upc_code IS 'UPC code if extracted from receipt or matched during processing.';
+
+-- Add constraint for upc_code format (cannot add via ALTER, will validate in app)
+CREATE INDEX IF NOT EXISTS idx_receipt_items_upc_code ON public.receipt_items(upc_code)
+    WHERE upc_code IS NOT NULL;
--- a/sql/migrations/003_receipt_scanning_enhancements.sql
+++ b/sql/migrations/003_receipt_scanning_enhancements.sql
@@ -0,0 +1,169 @@
+-- sql/migrations/003_receipt_scanning_enhancements.sql
+-- ============================================================================
+-- RECEIPT SCANNING ENHANCEMENTS MIGRATION
+-- ============================================================================
+-- Purpose:
+-- This migration adds enhancements to the existing receipt scanning tables:
+-- 1. Enhancements to receipts table for better OCR processing
+-- 2. Enhancements to receipt_items for better item matching
+-- 3. receipt_processing_log for tracking OCR/AI processing attempts
+--
+-- Existing tables:
+-- - receipts (lines 932-948 in master_schema_rollup.sql)
+-- - receipt_items (lines 951-966 in master_schema_rollup.sql)
+-- ============================================================================
+
+-- 1. Enhancements to receipts table
+
+-- Add store detection confidence
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS store_confidence NUMERIC(5,4);
+COMMENT ON COLUMN public.receipts.store_confidence IS 'Confidence score for store detection (0.0-1.0).';
+
+-- Add OCR provider used
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS ocr_provider TEXT;
+COMMENT ON COLUMN public.receipts.ocr_provider IS 'Which OCR service processed this receipt: tesseract, openai, anthropic.';
+
+-- Add error details for failed processing
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS error_details JSONB;
+COMMENT ON COLUMN public.receipts.error_details IS 'Detailed error information if processing failed.';
+
+-- Add retry count for failed processing
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS retry_count INTEGER DEFAULT 0;
+COMMENT ON COLUMN public.receipts.retry_count IS 'Number of processing retry attempts.';
+
+-- Add extracted text confidence
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS ocr_confidence NUMERIC(5,4);
+COMMENT ON COLUMN public.receipts.ocr_confidence IS 'Overall OCR text extraction confidence score.';
+
+-- Add currency detection
+ALTER TABLE public.receipts
+    ADD COLUMN IF NOT EXISTS currency TEXT DEFAULT 'CAD';
+COMMENT ON COLUMN public.receipts.currency IS 'Detected currency: CAD, USD, etc.';
+
+-- New indexes for receipt processing
+CREATE INDEX IF NOT EXISTS idx_receipts_status_retry ON public.receipts(status, retry_count)
+    WHERE status IN ('pending', 'failed') AND retry_count < 3;
+
+
+-- 2. Enhancements to receipt_items table
+
+-- Add line number from receipt for ordering
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS line_number INTEGER;
+COMMENT ON COLUMN public.receipt_items.line_number IS 'Original line number on the receipt for display ordering.';
+
+-- Add match confidence score
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS match_confidence NUMERIC(5,4);
+COMMENT ON COLUMN public.receipt_items.match_confidence IS 'Confidence score for item matching (0.0-1.0).';
+
+-- Add is_discount flag for discount/coupon lines
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS is_discount BOOLEAN DEFAULT FALSE;
+COMMENT ON COLUMN public.receipt_items.is_discount IS 'Whether this line is a discount/coupon (negative price).';
+
+-- Add unit_price if per-unit pricing detected
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS unit_price_cents INTEGER;
+COMMENT ON COLUMN public.receipt_items.unit_price_cents IS 'Per-unit price if detected (e.g., price per kg).';
+
+-- Add unit type if detected
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS unit_type TEXT;
+COMMENT ON COLUMN public.receipt_items.unit_type IS 'Unit type if detected: kg, lb, each, etc.';
+
+-- Add added_to_pantry flag
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS added_to_pantry BOOLEAN DEFAULT FALSE;
+COMMENT ON COLUMN public.receipt_items.added_to_pantry IS 'Whether this item has been added to user pantry.';
+
+-- Add pantry_item_id link
+ALTER TABLE public.receipt_items
+    ADD COLUMN IF NOT EXISTS pantry_item_id BIGINT REFERENCES public.pantry_items(pantry_item_id) ON DELETE SET NULL;
+COMMENT ON COLUMN public.receipt_items.pantry_item_id IS 'Link to pantry_items if this receipt item was added to pantry.';
+
+-- New indexes for receipt_items
+CREATE INDEX IF NOT EXISTS idx_receipt_items_status ON public.receipt_items(status);
+CREATE INDEX IF NOT EXISTS idx_receipt_items_added_to_pantry ON public.receipt_items(receipt_id, added_to_pantry)
+    WHERE added_to_pantry = FALSE;
+CREATE INDEX IF NOT EXISTS idx_receipt_items_pantry_item_id ON public.receipt_items(pantry_item_id)
+    WHERE pantry_item_id IS NOT NULL;
+
+
+-- 3. Receipt Processing Log - track OCR/AI processing attempts
+-- Useful for debugging, monitoring costs, and improving processing
+CREATE TABLE IF NOT EXISTS public.receipt_processing_log (
+    log_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    receipt_id BIGINT NOT NULL REFERENCES public.receipts(receipt_id) ON DELETE CASCADE,
+    processing_step TEXT NOT NULL,
+    status TEXT NOT NULL,
+    provider TEXT,
+    duration_ms INTEGER,
+    tokens_used INTEGER,
+    cost_cents INTEGER,
+    input_data JSONB,
+    output_data JSONB,
+    error_message TEXT,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate processing step
+    CONSTRAINT receipt_processing_log_step_check CHECK (processing_step IN (
+        'upload', 'ocr_extraction', 'text_parsing', 'store_detection',
+        'item_extraction', 'item_matching', 'price_parsing', 'finalization'
+    )),
+    -- Validate status
+    CONSTRAINT receipt_processing_log_status_check CHECK (status IN ('started', 'completed', 'failed', 'skipped')),
+    -- Validate provider if specified
+    CONSTRAINT receipt_processing_log_provider_check CHECK (provider IS NULL OR provider IN (
+        'tesseract', 'openai', 'anthropic', 'google_vision', 'aws_textract', 'internal'
+    ))
+);
+COMMENT ON TABLE public.receipt_processing_log IS 'Detailed log of each processing step for receipts, useful for debugging and cost tracking.';
+COMMENT ON COLUMN public.receipt_processing_log.processing_step IS 'Which processing step this log entry is for.';
+COMMENT ON COLUMN public.receipt_processing_log.status IS 'Status of this step: started, completed, failed, skipped.';
+COMMENT ON COLUMN public.receipt_processing_log.provider IS 'External service used: tesseract, openai, anthropic, etc.';
+COMMENT ON COLUMN public.receipt_processing_log.duration_ms IS 'How long this step took in milliseconds.';
+COMMENT ON COLUMN public.receipt_processing_log.tokens_used IS 'Number of API tokens used (for LLM providers).';
+COMMENT ON COLUMN public.receipt_processing_log.cost_cents IS 'Estimated cost in cents for this processing step.';
+COMMENT ON COLUMN public.receipt_processing_log.input_data IS 'Input data sent to the processing step (for debugging).';
+COMMENT ON COLUMN public.receipt_processing_log.output_data IS 'Output data received from the processing step.';
+
+-- Indexes for receipt_processing_log
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_receipt_id ON public.receipt_processing_log(receipt_id);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_step_status ON public.receipt_processing_log(processing_step, status);
+CREATE INDEX IF NOT EXISTS idx_receipt_processing_log_created_at ON public.receipt_processing_log(created_at DESC);
+
+
+-- 4. Store-specific receipt patterns - help identify stores from receipt text
+CREATE TABLE IF NOT EXISTS public.store_receipt_patterns (
+    pattern_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    store_id BIGINT NOT NULL REFERENCES public.stores(store_id) ON DELETE CASCADE,
+    pattern_type TEXT NOT NULL,
+    pattern_value TEXT NOT NULL,
+    priority INTEGER DEFAULT 0,
+    is_active BOOLEAN DEFAULT TRUE,
+    created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT now() NOT NULL,
+    -- Validate pattern type
+    CONSTRAINT store_receipt_patterns_type_check CHECK (pattern_type IN (
+        'header_regex', 'footer_regex', 'phone_number', 'address_fragment', 'store_number_format'
+    )),
+    -- Validate pattern is not empty
+    CONSTRAINT store_receipt_patterns_value_check CHECK (TRIM(pattern_value) <> ''),
+    -- Unique constraint per store/type/value
+    UNIQUE(store_id, pattern_type, pattern_value)
+);
+COMMENT ON TABLE public.store_receipt_patterns IS 'Patterns to help identify stores from receipt text and format.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_type IS 'Type of pattern: header_regex, footer_regex, phone_number, etc.';
+COMMENT ON COLUMN public.store_receipt_patterns.pattern_value IS 'The actual pattern (regex or literal text).';
+COMMENT ON COLUMN public.store_receipt_patterns.priority IS 'Higher priority patterns are checked first.';
+COMMENT ON COLUMN public.store_receipt_patterns.is_active IS 'Whether this pattern is currently in use.';
+
+-- Indexes for store_receipt_patterns
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_store_id ON public.store_receipt_patterns(store_id);
+CREATE INDEX IF NOT EXISTS idx_store_receipt_patterns_active ON public.store_receipt_patterns(pattern_type, is_active, priority DESC)
+    WHERE is_active = TRUE;
--- a/src/components/ErrorBoundary.tsx
+++ b/src/components/ErrorBoundary.tsx
@@ -0,0 +1,152 @@
+// src/components/ErrorBoundary.tsx
+/**
+ * React Error Boundary with Sentry integration.
+ * Implements ADR-015: Application Performance Monitoring and Error Tracking.
+ *
+ * This component catches JavaScript errors anywhere in the child component tree,
+ * logs them to Sentry/Bugsink, and displays a fallback UI instead of crashing.
+ */
+import { Component, ReactNode } from 'react';
+import { Sentry, captureException, isSentryConfigured } from '../services/sentry.client';
+
+interface ErrorBoundaryProps {
+  /** Child components to render */
+  children: ReactNode;
+  /** Optional custom fallback UI. If not provided, uses default error message. */
+  fallback?: ReactNode;
+  /** Optional callback when an error is caught */
+  onError?: (error: Error, errorInfo: React.ErrorInfo) => void;
+}
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+  error: Error | null;
+  eventId: string | null;
+}
+
+/**
+ * Error Boundary component that catches React component errors
+ * and reports them to Sentry/Bugsink.
+ *
+ * @example
+ * ```tsx
+ * <ErrorBoundary fallback={<p>Something went wrong.</p>}>
+ *   <MyComponent />
+ * </ErrorBoundary>
+ * ```
+ */
+export class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundaryState> {
+  constructor(props: ErrorBoundaryProps) {
+    super(props);
+    this.state = {
+      hasError: false,
+      error: null,
+      eventId: null,
+    };
+  }
+
+  static getDerivedStateFromError(error: Error): Partial<ErrorBoundaryState> {
+    return { hasError: true, error };
+  }
+
+  componentDidCatch(error: Error, errorInfo: React.ErrorInfo): void {
+    // Log to console in development
+    console.error('ErrorBoundary caught an error:', error, errorInfo);
+
+    // Report to Sentry with component stack
+    const eventId = captureException(error, {
+      componentStack: errorInfo.componentStack,
+    });
+
+    this.setState({ eventId: eventId ?? null });
+
+    // Call optional onError callback
+    this.props.onError?.(error, errorInfo);
+  }
+
+  handleReload = (): void => {
+    window.location.reload();
+  };
+
+  handleReportFeedback = (): void => {
+    if (isSentryConfigured && this.state.eventId) {
+      // Open Sentry feedback dialog if available
+      Sentry.showReportDialog({ eventId: this.state.eventId });
+    }
+  };
+
+  render(): ReactNode {
+    if (this.state.hasError) {
+      // Custom fallback UI if provided
+      if (this.props.fallback) {
+        return this.props.fallback;
+      }
+
+      // Default fallback UI
+      return (
+        <div className="flex min-h-screen items-center justify-center bg-gray-50 dark:bg-gray-900 p-4">
+          <div className="max-w-md w-full bg-white dark:bg-gray-800 rounded-lg shadow-lg p-6 text-center">
+            <div className="text-red-500 dark:text-red-400 mb-4">
+              <svg
+                className="w-16 h-16 mx-auto"
+                fill="none"
+                stroke="currentColor"
+                viewBox="0 0 24 24"
+                aria-hidden="true"
+              >
+                <path
+                  strokeLinecap="round"
+                  strokeLinejoin="round"
+                  strokeWidth={2}
+                  d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"
+                />
+              </svg>
+            </div>
+            <h1 className="text-xl font-semibold text-gray-900 dark:text-white mb-2">
+              Something went wrong
+            </h1>
+            <p className="text-gray-600 dark:text-gray-400 mb-6">
+              We&apos;re sorry, but an unexpected error occurred. Our team has been notified.
+            </p>
+            <div className="flex flex-col sm:flex-row gap-3 justify-center">
+              <button
+                onClick={this.handleReload}
+                className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 transition-colors"
+              >
+                Reload Page
+              </button>
+              {isSentryConfigured && this.state.eventId && (
+                <button
+                  onClick={this.handleReportFeedback}
+                  className="px-4 py-2 bg-gray-200 dark:bg-gray-700 text-gray-800 dark:text-gray-200 rounded-md hover:bg-gray-300 dark:hover:bg-gray-600 transition-colors"
+                >
+                  Report Feedback
+                </button>
+              )}
+            </div>
+            {this.state.error && process.env.NODE_ENV === 'development' && (
+              <details className="mt-6 text-left">
+                <summary className="cursor-pointer text-sm text-gray-500 dark:text-gray-400">
+                  Error Details (Development Only)
+                </summary>
+                <pre className="mt-2 p-3 bg-gray-100 dark:bg-gray-900 rounded text-xs overflow-auto max-h-48 text-red-600 dark:text-red-400">
+                  {this.state.error.message}
+                  {'\n\n'}
+                  {this.state.error.stack}
+                </pre>
+              </details>
+            )}
+          </div>
+        </div>
+      );
+    }
+
+    return this.props.children;
+  }
+}
+
+/**
+ * Pre-configured Sentry ErrorBoundary from @sentry/react.
+ * Use this for simpler integration when you don't need custom UI.
+ */
+export const SentryErrorBoundary = Sentry.ErrorBoundary;
--- a/src/config.ts
+++ b/src/config.ts
@@ -14,6 +14,16 @@ const config = {
  google: {
    mapsEmbedApiKey: import.meta.env.VITE_GOOGLE_MAPS_EMBED_API_KEY,
  },
+  /**
+   * Sentry/Bugsink error tracking configuration (ADR-015).
+   * Uses VITE_ prefix for client-side environment variables.
+   */
+  sentry: {
+    dsn: import.meta.env.VITE_SENTRY_DSN,
+    environment: import.meta.env.VITE_SENTRY_ENVIRONMENT || import.meta.env.MODE,
+    debug: import.meta.env.VITE_SENTRY_DEBUG === 'true',
+    enabled: import.meta.env.VITE_SENTRY_ENABLED !== 'false',
+  },
 };

 export default config;
--- a/src/config/env.ts
+++ b/src/config/env.ts
@@ -94,6 +94,15 @@ const aiSchema = z.object({
  priceQualityThreshold: floatWithDefault(0.5),
 });

+/**
+ * UPC API configuration schema.
+ * External APIs for product lookup by barcode.
+ */
+const upcSchema = z.object({
+  upcItemDbApiKey: z.string().optional(), // UPC Item DB API key (upcitemdb.com)
+  barcodeLookupApiKey: z.string().optional(), // Barcode Lookup API key (barcodelookup.com)
+});
+
 /**
 * Google services configuration schema.
 */
@@ -126,6 +135,17 @@ const serverSchema = z.object({
  storagePath: z.string().default('/var/www/flyer-crawler.projectium.com/flyer-images'),
 });

+/**
+ * Error tracking configuration schema (ADR-015).
+ * Uses Bugsink (Sentry-compatible self-hosted error tracking).
+ */
+const sentrySchema = z.object({
+  dsn: z.string().optional(), // Sentry DSN for backend
+  enabled: booleanString(true),
+  environment: z.string().optional(),
+  debug: booleanString(false),
+});
+
 /**
 * Complete environment configuration schema.
 */
@@ -135,9 +155,11 @@ const envSchema = z.object({
  auth: authSchema,
  smtp: smtpSchema,
  ai: aiSchema,
+  upc: upcSchema,
  google: googleSchema,
  worker: workerSchema,
  server: serverSchema,
+  sentry: sentrySchema,
 });

 export type EnvConfig = z.infer<typeof envSchema>;
@@ -178,6 +200,10 @@ function loadEnvVars(): unknown {
      geminiRpm: process.env.GEMINI_RPM,
      priceQualityThreshold: process.env.AI_PRICE_QUALITY_THRESHOLD,
    },
+    upc: {
+      upcItemDbApiKey: process.env.UPC_ITEM_DB_API_KEY,
+      barcodeLookupApiKey: process.env.BARCODE_LOOKUP_API_KEY,
+    },
    google: {
      mapsApiKey: process.env.GOOGLE_MAPS_API_KEY,
      clientId: process.env.GOOGLE_CLIENT_ID,
@@ -198,6 +224,12 @@ function loadEnvVars(): unknown {
      baseUrl: process.env.BASE_URL,
      storagePath: process.env.STORAGE_PATH,
    },
+    sentry: {
+      dsn: process.env.SENTRY_DSN,
+      enabled: process.env.SENTRY_ENABLED,
+      environment: process.env.SENTRY_ENVIRONMENT || process.env.NODE_ENV,
+      debug: process.env.SENTRY_DEBUG,
+    },
  };
 }

@@ -301,3 +333,18 @@ export const isAiConfigured = !!config.ai.geminiApiKey;
 * Returns true if Google Maps is configured.
 */
 export const isGoogleMapsConfigured = !!config.google.mapsApiKey;
+
+/**
+ * Returns true if Sentry/Bugsink error tracking is configured and enabled.
+ */
+export const isSentryConfigured = !!config.sentry.dsn && config.sentry.enabled;
+
+/**
+ * Returns true if UPC Item DB API is configured.
+ */
+export const isUpcItemDbConfigured = !!config.upc.upcItemDbApiKey;
+
+/**
+ * Returns true if Barcode Lookup API is configured.
+ */
+export const isBarcodeLookupConfigured = !!config.upc.barcodeLookupApiKey;
--- a/src/routes/passport.routes.test.ts
+++ b/src/routes/passport.routes.test.ts
@@ -1,4 +1,4 @@
-// src/routes/passport.routes.test.ts
+// src/config/passport.test.ts
 import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
 import * as bcrypt from 'bcrypt';
 import { Request, Response, NextFunction } from 'express';
@@ -101,7 +101,7 @@ vi.mock('passport', () => {
 });

 // Now, import the passport configuration which will use our mocks
-import passport, { isAdmin, optionalAuth, mockAuth } from './passport.routes';
+import passport, { isAdmin, optionalAuth, mockAuth } from './passport';
 import { logger } from '../services/logger.server';
 import { ForbiddenError } from '../services/db/errors.db';

--- a/src/routes/passport.routes.ts
+++ b/src/routes/passport.routes.ts
@@ -1,4 +1,4 @@
-// src/routes/passport.routes.ts
+// src/config/passport.ts
 import passport from 'passport';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { Strategy as LocalStrategy } from 'passport-local';
--- a/src/config/workerOptions.ts
+++ b/src/config/workerOptions.ts
@@ -0,0 +1,18 @@
+import { WorkerOptions } from 'bullmq';
+
+/**
+ * Standard worker options for stall detection and recovery.
+ * Defined in ADR-053.
+ *
+ * Note: This is a partial configuration that must be spread into a full
+ * WorkerOptions object along with a `connection` property when creating workers.
+ */
+export const defaultWorkerOptions: Omit<WorkerOptions, 'connection'> = {
+  // Check for stalled jobs every 30 seconds
+  stalledInterval: 30000,
+  // Fail job after 3 stalls (prevents infinite loops causing infinite retries)
+  maxStalledCount: 3,
+  // Duration of the lock for the job in milliseconds.
+  // If the worker doesn't renew this (e.g. crash), the job stalls.
+  lockDuration: 30000,
+};
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,4 +1,12 @@
 // src/index.tsx
+/**
+ * IMPORTANT: Sentry initialization MUST happen before any other imports
+ * to ensure all errors are captured, including those in imported modules.
+ * See ADR-015: Application Performance Monitoring and Error Tracking.
+ */
+import { initSentry } from './services/sentry.client';
+initSentry();
+
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import App from './App';
--- a/src/middleware/multer.middleware.ts
+++ b/src/middleware/multer.middleware.ts
@@ -11,12 +11,17 @@ import { logger } from '../services/logger.server';
 export const flyerStoragePath =
  process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
 export const avatarStoragePath = path.join(process.cwd(), 'public', 'uploads', 'avatars');
+export const receiptStoragePath = path.join(
+  process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com',
+  'receipts',
+);

 // Ensure directories exist at startup
 (async () => {
  try {
    await fs.mkdir(flyerStoragePath, { recursive: true });
    await fs.mkdir(avatarStoragePath, { recursive: true });
+    await fs.mkdir(receiptStoragePath, { recursive: true });
    logger.info('Ensured multer storage directories exist.');
  } catch (error) {
    const err = error instanceof Error ? error : new Error(String(error));
@@ -24,7 +29,7 @@ export const avatarStoragePath = path.join(process.cwd(), 'public', 'uploads', '
  }
 })();

-type StorageType = 'flyer' | 'avatar';
+type StorageType = 'flyer' | 'avatar' | 'receipt';

 const getStorageConfig = (type: StorageType) => {
  switch (type) {
@@ -47,6 +52,17 @@ const getStorageConfig = (type: StorageType) => {
          cb(null, uniqueSuffix);
        },
      });
+    case 'receipt':
+      return multer.diskStorage({
+        destination: (req, file, cb) => cb(null, receiptStoragePath),
+        filename: (req, file, cb) => {
+          const user = req.user as UserProfile | undefined;
+          const userId = user?.user.user_id || 'anonymous';
+          const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+          const sanitizedOriginalName = sanitizeFilename(file.originalname);
+          cb(null, `receipt-${userId}-${uniqueSuffix}-${sanitizedOriginalName}`);
+        },
+      });
    case 'flyer':
    default:
      return multer.diskStorage({
--- a/src/providers/AppProviders.tsx
+++ b/src/providers/AppProviders.tsx
@@ -8,6 +8,7 @@ import { FlyersProvider } from './FlyersProvider';
 import { MasterItemsProvider } from './MasterItemsProvider';
 import { ModalProvider } from './ModalProvider';
 import { UserDataProvider } from './UserDataProvider';
+import { ErrorBoundary } from '../components/ErrorBoundary';

 interface AppProvidersProps {
  children: ReactNode;
@@ -18,6 +19,7 @@ interface AppProvidersProps {
 * This cleans up index.tsx and makes the provider hierarchy clear.
 *
 * Provider hierarchy (from outermost to innermost):
+ * 0. ErrorBoundary - Catches React errors and reports to Sentry (ADR-015)
 * 1. QueryClientProvider - TanStack Query for server state management (ADR-0005)
 * 2. ModalProvider - Modal state management
 * 3. AuthProvider - Authentication state
@@ -27,18 +29,20 @@ interface AppProvidersProps {
 */
 export const AppProviders: React.FC<AppProvidersProps> = ({ children }) => {
  return (
-    <QueryClientProvider client={queryClient}>
-      <ModalProvider>
-        <AuthProvider>
-          <FlyersProvider>
-            <MasterItemsProvider>
-              <UserDataProvider>{children}</UserDataProvider>
-            </MasterItemsProvider>
-          </FlyersProvider>
-        </AuthProvider>
-      </ModalProvider>
-      {/* React Query Devtools - only visible in development */}
-      {import.meta.env.DEV && <ReactQueryDevtools initialIsOpen={false} />}
-    </QueryClientProvider>
+    <ErrorBoundary>
+      <QueryClientProvider client={queryClient}>
+        <ModalProvider>
+          <AuthProvider>
+            <FlyersProvider>
+              <MasterItemsProvider>
+                <UserDataProvider>{children}</UserDataProvider>
+              </MasterItemsProvider>
+            </FlyersProvider>
+          </AuthProvider>
+        </ModalProvider>
+        {/* React Query Devtools - only visible in development */}
+        {import.meta.env.DEV && <ReactQueryDevtools initialIsOpen={false} />}
+      </QueryClientProvider>
+    </ErrorBoundary>
  );
 };
--- a/src/routes/admin.routes.ts
+++ b/src/routes/admin.routes.ts
@@ -1,7 +1,6 @@
 // src/routes/admin.routes.ts
 import { Router, NextFunction, Request, Response } from 'express';
-import passport from './passport.routes';
-import { isAdmin } from './passport.routes'; // Correctly imported
+import passport, { isAdmin } from '../config/passport';
 import { z } from 'zod';

 import * as db from '../services/db/index.db';
--- a/src/routes/ai.routes.ts
+++ b/src/routes/ai.routes.ts
@@ -3,9 +3,7 @@
 import { Router, Request, Response, NextFunction } from 'express';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { z } from 'zod';
-import passport from './passport.routes';
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
-import { optionalAuth } from './passport.routes';
+import passport, { optionalAuth } from '../config/passport';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { aiService, DuplicateFlyerError } from '../services/aiService.server';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
@@ -179,8 +177,41 @@ router.use((req: Request, res: Response, next: NextFunction) => {
 });

 /**
- * NEW ENDPOINT: Accepts a single flyer file (PDF or image), enqueues it for
- * background processing, and immediately returns a job ID.
+ * @openapi
+ * /ai/upload-and-process:
+ *   post:
+ *     tags: [AI]
+ *     summary: Upload and process flyer
+ *     description: Accepts a single flyer file (PDF or image), enqueues it for background processing, and immediately returns a job ID.
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - flyerFile
+ *               - checksum
+ *             properties:
+ *               flyerFile:
+ *                 type: string
+ *                 format: binary
+ *                 description: Flyer file (PDF or image)
+ *               checksum:
+ *                 type: string
+ *                 pattern: ^[a-f0-9]{64}$
+ *                 description: SHA-256 checksum of the file
+ *               baseUrl:
+ *                 type: string
+ *                 format: uri
+ *                 description: Optional base URL
+ *     responses:
+ *       202:
+ *         description: Flyer accepted for processing
+ *       400:
+ *         description: Missing file or invalid checksum
+ *       409:
+ *         description: Duplicate flyer detected
 */
 router.post(
  '/upload-and-process',
@@ -245,12 +276,37 @@ router.post(
 );

 /**
- * POST /api/ai/upload-legacy - Process a flyer upload from a legacy client.
- * This is an authenticated route that processes the flyer synchronously.
- * This is used for integration testing the legacy upload flow.
- *
- * @deprecated Use POST /api/ai/upload-and-process instead for async queue-based processing (ADR-0006).
- * This synchronous endpoint is retained only for integration testing purposes.
+ * @openapi
+ * /ai/upload-legacy:
+ *   post:
+ *     tags: [AI]
+ *     summary: Legacy flyer upload (deprecated)
+ *     description: Process a flyer upload synchronously. Deprecated - use /upload-and-process instead.
+ *     deprecated: true
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - flyerFile
+ *             properties:
+ *               flyerFile:
+ *                 type: string
+ *                 format: binary
+ *                 description: Flyer file (PDF or image)
+ *     responses:
+ *       200:
+ *         description: Flyer processed successfully
+ *       400:
+ *         description: No flyer file uploaded
+ *       401:
+ *         description: Unauthorized
+ *       409:
+ *         description: Duplicate flyer detected
 */
 router.post(
  '/upload-legacy',
@@ -282,7 +338,24 @@ router.post(
 );

 /**
- * NEW ENDPOINT: Checks the status of a background job.
+ * @openapi
+ * /ai/jobs/{jobId}/status:
+ *   get:
+ *     tags: [AI]
+ *     summary: Check job status
+ *     description: Checks the status of a background flyer processing job.
+ *     parameters:
+ *       - in: path
+ *         name: jobId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Job ID returned from upload-and-process
+ *     responses:
+ *       200:
+ *         description: Job status information
+ *       404:
+ *         description: Job not found
 */
 router.get(
  '/jobs/:jobId/status',
@@ -304,12 +377,33 @@ router.get(
 );

 /**
- * POST /api/ai/flyers/process - Saves the processed flyer data to the database.
- * This is the final step in the flyer upload workflow after the AI has extracted the data.
- * It uses `optionalAuth` to handle submissions from both anonymous and authenticated users.
- *
- * @deprecated Use POST /api/ai/upload-and-process instead for async queue-based processing (ADR-0006).
- * This synchronous endpoint processes flyers inline and should be migrated to the queue-based approach.
+ * @openapi
+ * /ai/flyers/process:
+ *   post:
+ *     tags: [AI]
+ *     summary: Process flyer data (deprecated)
+ *     description: Saves processed flyer data to the database. Deprecated - use /upload-and-process instead.
+ *     deprecated: true
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - flyerImage
+ *             properties:
+ *               flyerImage:
+ *                 type: string
+ *                 format: binary
+ *                 description: Flyer image file
+ *     responses:
+ *       201:
+ *         description: Flyer processed and saved successfully
+ *       400:
+ *         description: Flyer image file is required
+ *       409:
+ *         description: Duplicate flyer detected
 */
 router.post(
  '/flyers/process',
@@ -348,8 +442,30 @@ router.post(
 );

 /**
- * This endpoint checks if an image is a flyer. It uses `optionalAuth` to allow
- * both authenticated and anonymous users to perform this check.
+ * @openapi
+ * /ai/check-flyer:
+ *   post:
+ *     tags: [AI]
+ *     summary: Check if image is a flyer
+ *     description: Analyzes an image to determine if it's a grocery store flyer.
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - image
+ *             properties:
+ *               image:
+ *                 type: string
+ *                 format: binary
+ *                 description: Image file to check
+ *     responses:
+ *       200:
+ *         description: Flyer check result
+ *       400:
+ *         description: Image file is required
 */
 router.post(
  '/check-flyer',
@@ -371,6 +487,32 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/extract-address:
+ *   post:
+ *     tags: [AI]
+ *     summary: Extract address from image
+ *     description: Extracts store address information from a flyer image.
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - image
+ *             properties:
+ *               image:
+ *                 type: string
+ *                 format: binary
+ *                 description: Image file to extract address from
+ *     responses:
+ *       200:
+ *         description: Extracted address information
+ *       400:
+ *         description: Image file is required
+ */
 router.post(
  '/extract-address',
  aiUploadLimiter,
@@ -391,6 +533,34 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/extract-logo:
+ *   post:
+ *     tags: [AI]
+ *     summary: Extract store logo
+ *     description: Extracts store logo from flyer images.
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - images
+ *             properties:
+ *               images:
+ *                 type: array
+ *                 items:
+ *                   type: string
+ *                   format: binary
+ *                 description: Image files to extract logo from
+ *     responses:
+ *       200:
+ *         description: Extracted logo as base64
+ *       400:
+ *         description: Image files are required
+ */
 router.post(
  '/extract-logo',
  aiUploadLimiter,
@@ -411,6 +581,36 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/quick-insights:
+ *   post:
+ *     tags: [AI]
+ *     summary: Get quick insights
+ *     description: Get AI-generated quick insights about flyer items.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - items
+ *             properties:
+ *               items:
+ *                 type: array
+ *                 items:
+ *                   type: object
+ *                 minItems: 1
+ *                 description: List of flyer items to analyze
+ *     responses:
+ *       200:
+ *         description: AI-generated quick insights
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/quick-insights',
  aiGenerationLimiter,
@@ -426,6 +626,36 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/deep-dive:
+ *   post:
+ *     tags: [AI]
+ *     summary: Get deep dive analysis
+ *     description: Get detailed AI-generated analysis about flyer items.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - items
+ *             properties:
+ *               items:
+ *                 type: array
+ *                 items:
+ *                   type: object
+ *                 minItems: 1
+ *                 description: List of flyer items to analyze
+ *     responses:
+ *       200:
+ *         description: Detailed AI analysis
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/deep-dive',
  aiGenerationLimiter,
@@ -443,6 +673,33 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/search-web:
+ *   post:
+ *     tags: [AI]
+ *     summary: Search web for information
+ *     description: Search the web for product or deal information.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - query
+ *             properties:
+ *               query:
+ *                 type: string
+ *                 description: Search query
+ *     responses:
+ *       200:
+ *         description: Search results with sources
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/search-web',
  aiGenerationLimiter,
@@ -458,6 +715,36 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/compare-prices:
+ *   post:
+ *     tags: [AI]
+ *     summary: Compare prices across stores
+ *     description: Compare prices for items across different stores.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - items
+ *             properties:
+ *               items:
+ *                 type: array
+ *                 items:
+ *                   type: object
+ *                 minItems: 1
+ *                 description: List of items to compare
+ *     responses:
+ *       200:
+ *         description: Price comparison results
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/compare-prices',
  aiGenerationLimiter,
@@ -477,6 +764,59 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/plan-trip:
+ *   post:
+ *     tags: [AI]
+ *     summary: Plan shopping trip
+ *     description: Plan an optimized shopping trip to a store based on items and location.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - items
+ *               - store
+ *               - userLocation
+ *             properties:
+ *               items:
+ *                 type: array
+ *                 items:
+ *                   type: object
+ *                 description: List of items to buy
+ *               store:
+ *                 type: object
+ *                 required:
+ *                   - name
+ *                 properties:
+ *                   name:
+ *                     type: string
+ *                     description: Store name
+ *               userLocation:
+ *                 type: object
+ *                 required:
+ *                   - latitude
+ *                   - longitude
+ *                 properties:
+ *                   latitude:
+ *                     type: number
+ *                     minimum: -90
+ *                     maximum: 90
+ *                   longitude:
+ *                     type: number
+ *                     minimum: -180
+ *                     maximum: 180
+ *     responses:
+ *       200:
+ *         description: Trip plan with directions
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/plan-trip',
  aiGenerationLimiter,
@@ -497,6 +837,33 @@ router.post(

 // --- STUBBED AI Routes for Future Features ---

+/**
+ * @openapi
+ * /ai/generate-image:
+ *   post:
+ *     tags: [AI]
+ *     summary: Generate image (not implemented)
+ *     description: Generate an image from a prompt. Currently not implemented.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - prompt
+ *             properties:
+ *               prompt:
+ *                 type: string
+ *                 description: Image generation prompt
+ *     responses:
+ *       501:
+ *         description: Not implemented
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/generate-image',
  aiGenerationLimiter,
@@ -510,6 +877,33 @@ router.post(
  },
 );

+/**
+ * @openapi
+ * /ai/generate-speech:
+ *   post:
+ *     tags: [AI]
+ *     summary: Generate speech (not implemented)
+ *     description: Generate speech from text. Currently not implemented.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - text
+ *             properties:
+ *               text:
+ *                 type: string
+ *                 description: Text to convert to speech
+ *     responses:
+ *       501:
+ *         description: Not implemented
+ *       401:
+ *         description: Unauthorized
+ */
 router.post(
  '/generate-speech',
  aiGenerationLimiter,
@@ -524,8 +918,43 @@ router.post(
 );

 /**
- * POST /api/ai/rescan-area - Performs a targeted AI scan on a specific area of an image.
- * Requires authentication.
+ * @openapi
+ * /ai/rescan-area:
+ *   post:
+ *     tags: [AI]
+ *     summary: Rescan area of image
+ *     description: Performs a targeted AI scan on a specific area of an image.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - image
+ *               - cropArea
+ *               - extractionType
+ *             properties:
+ *               image:
+ *                 type: string
+ *                 format: binary
+ *                 description: Image file to scan
+ *               cropArea:
+ *                 type: string
+ *                 description: JSON string with x, y, width, height
+ *               extractionType:
+ *                 type: string
+ *                 enum: [store_name, dates, item_details]
+ *                 description: Type of data to extract
+ *     responses:
+ *       200:
+ *         description: Extracted data from image area
+ *       400:
+ *         description: Image file is required
+ *       401:
+ *         description: Unauthorized
 */
 router.post(
  '/rescan-area',
--- a/src/routes/auth.routes.ts
+++ b/src/routes/auth.routes.ts
@@ -3,7 +3,7 @@
 import { Router, Request, Response, NextFunction } from 'express';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { z } from 'zod';
-import passport from './passport.routes';
+import passport from '../config/passport';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { UniqueConstraintError } from '../services/db/errors.db'; // Import actual class for instanceof checks
 // Removed: import { logger } from '../services/logger.server';
--- a/src/routes/budget.routes.ts
+++ b/src/routes/budget.routes.ts
@@ -1,7 +1,7 @@
 // src/routes/budget.ts
 import express, { Request, Response, NextFunction } from 'express';
 import { z } from 'zod';
-import passport from './passport.routes';
+import passport from '../config/passport';
 import { budgetRepo } from '../services/db/index.db';
 import type { UserProfile } from '../types';
 import { validateRequest } from '../middleware/validation.middleware';
--- a/src/routes/deals.routes.ts
+++ b/src/routes/deals.routes.ts
@@ -1,7 +1,7 @@
 // src/routes/deals.routes.ts
 import express, { type Request, type Response, type NextFunction } from 'express';
 import { z } from 'zod';
-import passport from './passport.routes';
+import passport from '../config/passport';
 import { dealsRepo } from '../services/db/deals.db';
 import type { UserProfile } from '../types';
 import { validateRequest } from '../middleware/validation.middleware';
--- a/src/routes/gamification.routes.ts
+++ b/src/routes/gamification.routes.ts
@@ -2,7 +2,7 @@
 import express, { NextFunction } from 'express';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { z } from 'zod';
-import passport, { isAdmin } from './passport.routes'; // Correctly imported
+import passport, { isAdmin } from '../config/passport';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { gamificationService } from '../services/gamificationService';
 // Removed: import { logger } from '../services/logger.server';
--- a/src/routes/inventory.routes.test.ts
+++ b/src/routes/inventory.routes.test.ts
@@ -0,0 +1,664 @@
+// src/routes/inventory.routes.test.ts
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import supertest from 'supertest';
+import type { Request, Response, NextFunction } from 'express';
+import { createMockUserProfile } from '../tests/utils/mockFactories';
+import { createTestApp } from '../tests/utils/createTestApp';
+import { NotFoundError } from '../services/db/errors.db';
+import type { UserInventoryItem, ExpiringItemsResponse } from '../types/expiry';
+
+// Mock the expiryService module
+vi.mock('../services/expiryService.server', () => ({
+  getInventory: vi.fn(),
+  addInventoryItem: vi.fn(),
+  getInventoryItemById: vi.fn(),
+  updateInventoryItem: vi.fn(),
+  deleteInventoryItem: vi.fn(),
+  markItemConsumed: vi.fn(),
+  getExpiringItemsGrouped: vi.fn(),
+  getExpiringItems: vi.fn(),
+  getExpiredItems: vi.fn(),
+  getAlertSettings: vi.fn(),
+  updateAlertSettings: vi.fn(),
+  getRecipeSuggestionsForExpiringItems: vi.fn(),
+}));
+
+// Mock the logger to keep test output clean
+vi.mock('../services/logger.server', async () => ({
+  logger: (await import('../tests/utils/mockLogger')).mockLogger,
+}));
+
+// Import the router and mocked service AFTER all mocks are defined.
+import inventoryRouter from './inventory.routes';
+import * as expiryService from '../services/expiryService.server';
+
+const mockUser = createMockUserProfile({
+  user: { user_id: 'user-123', email: 'test@test.com' },
+});
+
+// Standardized mock for passport
+vi.mock('../config/passport', () => ({
+  default: {
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      req.user = mockUser;
+      next();
+    }),
+    initialize: () => (req: Request, res: Response, next: NextFunction) => next(),
+  },
+}));
+
+// Define a reusable matcher for the logger object.
+const expectLogger = expect.objectContaining({
+  info: expect.any(Function),
+  error: expect.any(Function),
+});
+
+// Helper to create mock inventory item
+function createMockInventoryItem(overrides: Partial<UserInventoryItem> = {}): UserInventoryItem {
+  return {
+    inventory_id: 1,
+    user_id: 'user-123',
+    product_id: null,
+    master_item_id: 100,
+    item_name: 'Milk',
+    quantity: 1,
+    unit: 'liters',
+    purchase_date: '2024-01-10',
+    expiry_date: '2024-02-10',
+    source: 'manual',
+    location: 'fridge',
+    notes: null,
+    is_consumed: false,
+    consumed_at: null,
+    expiry_source: 'manual',
+    receipt_item_id: null,
+    pantry_location_id: 1,
+    notification_sent_at: null,
+    created_at: new Date().toISOString(),
+    updated_at: new Date().toISOString(),
+    days_until_expiry: 10,
+    expiry_status: 'fresh',
+    ...overrides,
+  };
+}
+
+describe('Inventory Routes (/api/inventory)', () => {
+  const mockUserProfile = createMockUserProfile({
+    user: { user_id: 'user-123', email: 'test@test.com' },
+  });
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    // Provide default mock implementations
+    vi.mocked(expiryService.getInventory).mockResolvedValue({ items: [], total: 0 });
+    vi.mocked(expiryService.getExpiringItems).mockResolvedValue([]);
+    vi.mocked(expiryService.getExpiredItems).mockResolvedValue([]);
+    vi.mocked(expiryService.getAlertSettings).mockResolvedValue([]);
+  });
+
+  const app = createTestApp({
+    router: inventoryRouter,
+    basePath: '/api/inventory',
+    authenticatedUser: mockUserProfile,
+  });
+
+  // ============================================================================
+  // INVENTORY ITEM ENDPOINTS
+  // ============================================================================
+
+  describe('GET /', () => {
+    it('should return paginated inventory items', async () => {
+      const mockItems = [createMockInventoryItem()];
+      vi.mocked(expiryService.getInventory).mockResolvedValue({
+        items: mockItems,
+        total: 1,
+      });
+
+      const response = await supertest(app).get('/api/inventory');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toHaveLength(1);
+      expect(response.body.data.total).toBe(1);
+    });
+
+    it('should support filtering by location', async () => {
+      vi.mocked(expiryService.getInventory).mockResolvedValue({ items: [], total: 0 });
+
+      const response = await supertest(app).get('/api/inventory?location=fridge');
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getInventory).toHaveBeenCalledWith(
+        expect.objectContaining({ location: 'fridge' }),
+        expectLogger,
+      );
+    });
+
+    it('should support filtering by expiring_within_days', async () => {
+      vi.mocked(expiryService.getInventory).mockResolvedValue({ items: [], total: 0 });
+
+      const response = await supertest(app).get('/api/inventory?expiring_within_days=7');
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getInventory).toHaveBeenCalledWith(
+        expect.objectContaining({ expiring_within_days: 7 }),
+        expectLogger,
+      );
+    });
+
+    it('should support search filter', async () => {
+      vi.mocked(expiryService.getInventory).mockResolvedValue({ items: [], total: 0 });
+
+      const response = await supertest(app).get('/api/inventory?search=milk');
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getInventory).toHaveBeenCalledWith(
+        expect.objectContaining({ search: 'milk' }),
+        expectLogger,
+      );
+    });
+
+    it('should support sorting', async () => {
+      vi.mocked(expiryService.getInventory).mockResolvedValue({ items: [], total: 0 });
+
+      const response = await supertest(app).get(
+        '/api/inventory?sort_by=expiry_date&sort_order=asc',
+      );
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getInventory).toHaveBeenCalledWith(
+        expect.objectContaining({
+          sort_by: 'expiry_date',
+          sort_order: 'asc',
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should return 400 for invalid location', async () => {
+      const response = await supertest(app).get('/api/inventory?location=invalid');
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.getInventory).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).get('/api/inventory');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('POST /', () => {
+    it('should add a new inventory item', async () => {
+      const mockItem = createMockInventoryItem();
+      vi.mocked(expiryService.addInventoryItem).mockResolvedValue(mockItem);
+
+      const response = await supertest(app).post('/api/inventory').send({
+        item_name: 'Milk',
+        source: 'manual',
+        quantity: 1,
+        location: 'fridge',
+        expiry_date: '2024-02-10',
+      });
+
+      expect(response.status).toBe(201);
+      expect(response.body.data.item_name).toBe('Milk');
+      expect(expiryService.addInventoryItem).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        expect.objectContaining({
+          item_name: 'Milk',
+          source: 'manual',
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should return 400 if item_name is missing', async () => {
+      const response = await supertest(app).post('/api/inventory').send({
+        source: 'manual',
+      });
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/Item name/i);
+    });
+
+    it('should return 400 for invalid source', async () => {
+      const response = await supertest(app).post('/api/inventory').send({
+        item_name: 'Milk',
+        source: 'invalid_source',
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 400 for invalid expiry_date format', async () => {
+      const response = await supertest(app).post('/api/inventory').send({
+        item_name: 'Milk',
+        source: 'manual',
+        expiry_date: '01-10-2024',
+      });
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/YYYY-MM-DD/);
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.addInventoryItem).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).post('/api/inventory').send({
+        item_name: 'Milk',
+        source: 'manual',
+      });
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /:inventoryId', () => {
+    it('should return a specific inventory item', async () => {
+      const mockItem = createMockInventoryItem();
+      vi.mocked(expiryService.getInventoryItemById).mockResolvedValue(mockItem);
+
+      const response = await supertest(app).get('/api/inventory/1');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.inventory_id).toBe(1);
+      expect(expiryService.getInventoryItemById).toHaveBeenCalledWith(
+        1,
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 404 when item not found', async () => {
+      vi.mocked(expiryService.getInventoryItemById).mockRejectedValue(
+        new NotFoundError('Item not found'),
+      );
+
+      const response = await supertest(app).get('/api/inventory/999');
+
+      expect(response.status).toBe(404);
+    });
+
+    it('should return 400 for invalid inventory ID', async () => {
+      const response = await supertest(app).get('/api/inventory/abc');
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('PUT /:inventoryId', () => {
+    it('should update an inventory item', async () => {
+      const mockItem = createMockInventoryItem({ quantity: 2 });
+      vi.mocked(expiryService.updateInventoryItem).mockResolvedValue(mockItem);
+
+      const response = await supertest(app).put('/api/inventory/1').send({
+        quantity: 2,
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.quantity).toBe(2);
+    });
+
+    it('should update expiry_date', async () => {
+      const mockItem = createMockInventoryItem({ expiry_date: '2024-03-01' });
+      vi.mocked(expiryService.updateInventoryItem).mockResolvedValue(mockItem);
+
+      const response = await supertest(app).put('/api/inventory/1').send({
+        expiry_date: '2024-03-01',
+      });
+
+      expect(response.status).toBe(200);
+      expect(expiryService.updateInventoryItem).toHaveBeenCalledWith(
+        1,
+        mockUserProfile.user.user_id,
+        expect.objectContaining({ expiry_date: '2024-03-01' }),
+        expectLogger,
+      );
+    });
+
+    it('should return 400 if no update fields provided', async () => {
+      const response = await supertest(app).put('/api/inventory/1').send({});
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/At least one field/);
+    });
+
+    it('should return 404 when item not found', async () => {
+      vi.mocked(expiryService.updateInventoryItem).mockRejectedValue(
+        new NotFoundError('Item not found'),
+      );
+
+      const response = await supertest(app).put('/api/inventory/999').send({
+        quantity: 2,
+      });
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('DELETE /:inventoryId', () => {
+    it('should delete an inventory item', async () => {
+      vi.mocked(expiryService.deleteInventoryItem).mockResolvedValue(undefined);
+
+      const response = await supertest(app).delete('/api/inventory/1');
+
+      expect(response.status).toBe(204);
+      expect(expiryService.deleteInventoryItem).toHaveBeenCalledWith(
+        1,
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 404 when item not found', async () => {
+      vi.mocked(expiryService.deleteInventoryItem).mockRejectedValue(
+        new NotFoundError('Item not found'),
+      );
+
+      const response = await supertest(app).delete('/api/inventory/999');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('POST /:inventoryId/consume', () => {
+    it('should mark item as consumed', async () => {
+      vi.mocked(expiryService.markItemConsumed).mockResolvedValue(undefined);
+
+      const response = await supertest(app).post('/api/inventory/1/consume');
+
+      expect(response.status).toBe(204);
+      expect(expiryService.markItemConsumed).toHaveBeenCalledWith(
+        1,
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 404 when item not found', async () => {
+      vi.mocked(expiryService.markItemConsumed).mockRejectedValue(
+        new NotFoundError('Item not found'),
+      );
+
+      const response = await supertest(app).post('/api/inventory/999/consume');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  // ============================================================================
+  // EXPIRING ITEMS ENDPOINTS
+  // ============================================================================
+
+  describe('GET /expiring/summary', () => {
+    it('should return expiring items grouped by urgency', async () => {
+      const mockSummary: ExpiringItemsResponse = {
+        expiring_today: [createMockInventoryItem({ days_until_expiry: 0 })],
+        expiring_this_week: [createMockInventoryItem({ days_until_expiry: 3 })],
+        expiring_this_month: [createMockInventoryItem({ days_until_expiry: 20 })],
+        already_expired: [createMockInventoryItem({ days_until_expiry: -5 })],
+        counts: {
+          today: 1,
+          this_week: 1,
+          this_month: 1,
+          expired: 1,
+          total: 4,
+        },
+      };
+
+      vi.mocked(expiryService.getExpiringItemsGrouped).mockResolvedValue(mockSummary);
+
+      const response = await supertest(app).get('/api/inventory/expiring/summary');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.counts.total).toBe(4);
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.getExpiringItemsGrouped).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).get('/api/inventory/expiring/summary');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /expiring', () => {
+    it('should return items expiring within default 7 days', async () => {
+      const mockItems = [createMockInventoryItem({ days_until_expiry: 5 })];
+      vi.mocked(expiryService.getExpiringItems).mockResolvedValue(mockItems);
+
+      const response = await supertest(app).get('/api/inventory/expiring');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toHaveLength(1);
+      expect(expiryService.getExpiringItems).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        7,
+        expectLogger,
+      );
+    });
+
+    it('should accept custom days parameter', async () => {
+      vi.mocked(expiryService.getExpiringItems).mockResolvedValue([]);
+
+      const response = await supertest(app).get('/api/inventory/expiring?days=14');
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getExpiringItems).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        14,
+        expectLogger,
+      );
+    });
+
+    it('should return 400 for invalid days parameter', async () => {
+      const response = await supertest(app).get('/api/inventory/expiring?days=100');
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('GET /expired', () => {
+    it('should return already expired items', async () => {
+      const mockItems = [
+        createMockInventoryItem({ days_until_expiry: -3, expiry_status: 'expired' }),
+      ];
+      vi.mocked(expiryService.getExpiredItems).mockResolvedValue(mockItems);
+
+      const response = await supertest(app).get('/api/inventory/expired');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toHaveLength(1);
+      expect(expiryService.getExpiredItems).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.getExpiredItems).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).get('/api/inventory/expired');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  // ============================================================================
+  // ALERT SETTINGS ENDPOINTS
+  // ============================================================================
+
+  describe('GET /alerts', () => {
+    it('should return user alert settings', async () => {
+      const mockSettings = [
+        {
+          expiry_alert_id: 1,
+          user_id: 'user-123',
+          alert_method: 'email' as const,
+          days_before_expiry: 3,
+          is_enabled: true,
+          last_alert_sent_at: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(expiryService.getAlertSettings).mockResolvedValue(mockSettings);
+
+      const response = await supertest(app).get('/api/inventory/alerts');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data).toHaveLength(1);
+      expect(response.body.data[0].alert_method).toBe('email');
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.getAlertSettings).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).get('/api/inventory/alerts');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('PUT /alerts/:alertMethod', () => {
+    it('should update alert settings for email', async () => {
+      const mockSettings = {
+        expiry_alert_id: 1,
+        user_id: 'user-123',
+        alert_method: 'email' as const,
+        days_before_expiry: 5,
+        is_enabled: true,
+        last_alert_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(expiryService.updateAlertSettings).mockResolvedValue(mockSettings);
+
+      const response = await supertest(app).put('/api/inventory/alerts/email').send({
+        days_before_expiry: 5,
+        is_enabled: true,
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.days_before_expiry).toBe(5);
+      expect(expiryService.updateAlertSettings).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        'email',
+        { days_before_expiry: 5, is_enabled: true },
+        expectLogger,
+      );
+    });
+
+    it('should return 400 for invalid alert method', async () => {
+      const response = await supertest(app).put('/api/inventory/alerts/sms').send({
+        is_enabled: true,
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 400 for invalid days_before_expiry', async () => {
+      const response = await supertest(app).put('/api/inventory/alerts/email').send({
+        days_before_expiry: 0,
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 400 if days_before_expiry exceeds maximum', async () => {
+      const response = await supertest(app).put('/api/inventory/alerts/email').send({
+        days_before_expiry: 31,
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.updateAlertSettings).mockRejectedValue(new Error('DB Error'));
+
+      const response = await supertest(app).put('/api/inventory/alerts/email').send({
+        is_enabled: false,
+      });
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  // ============================================================================
+  // RECIPE SUGGESTIONS ENDPOINT
+  // ============================================================================
+
+  describe('GET /recipes/suggestions', () => {
+    it('should return recipe suggestions for expiring items', async () => {
+      const mockInventoryItem = createMockInventoryItem({ inventory_id: 1, item_name: 'Milk' });
+      const mockResult = {
+        recipes: [
+          {
+            recipe_id: 1,
+            recipe_name: 'Milk Smoothie',
+            description: 'A healthy smoothie',
+            prep_time_minutes: 5,
+            cook_time_minutes: 0,
+            servings: 2,
+            photo_url: null,
+            matching_items: [mockInventoryItem],
+            match_count: 1,
+          },
+        ],
+        total: 1,
+        considered_items: [mockInventoryItem],
+      };
+
+      vi.mocked(expiryService.getRecipeSuggestionsForExpiringItems).mockResolvedValue(
+        mockResult as any,
+      );
+
+      const response = await supertest(app).get('/api/inventory/recipes/suggestions');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.recipes).toHaveLength(1);
+      expect(response.body.data.total).toBe(1);
+    });
+
+    it('should accept days, limit, and offset parameters', async () => {
+      vi.mocked(expiryService.getRecipeSuggestionsForExpiringItems).mockResolvedValue({
+        recipes: [],
+        total: 0,
+        considered_items: [],
+      });
+
+      const response = await supertest(app).get(
+        '/api/inventory/recipes/suggestions?days=14&limit=5&offset=10',
+      );
+
+      expect(response.status).toBe(200);
+      expect(expiryService.getRecipeSuggestionsForExpiringItems).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        14,
+        expectLogger,
+        { limit: 5, offset: 10 },
+      );
+    });
+
+    it('should return 400 for invalid days parameter', async () => {
+      const response = await supertest(app).get('/api/inventory/recipes/suggestions?days=100');
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if service fails', async () => {
+      vi.mocked(expiryService.getRecipeSuggestionsForExpiringItems).mockRejectedValue(
+        new Error('DB Error'),
+      );
+
+      const response = await supertest(app).get('/api/inventory/recipes/suggestions');
+
+      expect(response.status).toBe(500);
+    });
+  });
+});
--- a/src/routes/inventory.routes.ts
+++ b/src/routes/inventory.routes.ts
@@ -0,0 +1,839 @@
+// src/routes/inventory.routes.ts
+/**
+ * @file Inventory and Expiry Tracking API Routes
+ * Provides endpoints for managing pantry inventory, expiry tracking, and alerts.
+ */
+import express, { Request, Response, NextFunction } from 'express';
+import { z } from 'zod';
+import passport from '../config/passport';
+import type { UserProfile } from '../types';
+import { validateRequest } from '../middleware/validation.middleware';
+import { numericIdParam, optionalNumeric } from '../utils/zodUtils';
+import { sendSuccess, sendNoContent } from '../utils/apiResponse';
+import * as expiryService from '../services/expiryService.server';
+
+const router = express.Router();
+
+// --- Zod Schemas for Inventory Routes ---
+
+/**
+ * Storage location validation
+ */
+const storageLocationSchema = z.enum(['fridge', 'freezer', 'pantry', 'room_temp']);
+
+/**
+ * Inventory source validation
+ */
+const inventorySourceSchema = z.enum(['manual', 'receipt_scan', 'upc_scan']);
+
+/**
+ * Alert method validation
+ */
+const alertMethodSchema = z.enum(['email', 'push', 'in_app']);
+
+/**
+ * Schema for inventory item ID parameter
+ */
+const inventoryIdParamSchema = numericIdParam(
+  'inventoryId',
+  "Invalid ID for parameter 'inventoryId'. Must be a number.",
+);
+
+/**
+ * Schema for adding an inventory item
+ */
+const addInventoryItemSchema = z.object({
+  body: z.object({
+    product_id: z.number().int().positive().optional(),
+    master_item_id: z.number().int().positive().optional(),
+    item_name: z.string().min(1, 'Item name is required.').max(255),
+    quantity: z.number().positive().default(1),
+    unit: z.string().max(50).optional(),
+    purchase_date: z.string().date('Purchase date must be in YYYY-MM-DD format.').optional(),
+    expiry_date: z.string().date('Expiry date must be in YYYY-MM-DD format.').optional(),
+    source: inventorySourceSchema,
+    location: storageLocationSchema.optional(),
+    notes: z.string().max(500).optional(),
+  }),
+});
+
+/**
+ * Schema for updating an inventory item
+ */
+const updateInventoryItemSchema = inventoryIdParamSchema.extend({
+  body: z
+    .object({
+      quantity: z.number().positive().optional(),
+      unit: z.string().max(50).optional(),
+      expiry_date: z.string().date('Expiry date must be in YYYY-MM-DD format.').optional(),
+      location: storageLocationSchema.optional(),
+      notes: z.string().max(500).optional(),
+      is_consumed: z.boolean().optional(),
+    })
+    .refine((data) => Object.keys(data).length > 0, {
+      message: 'At least one field to update must be provided.',
+    }),
+});
+
+/**
+ * Schema for inventory query
+ */
+const inventoryQuerySchema = z.object({
+  query: z.object({
+    limit: optionalNumeric({ default: 50, min: 1, max: 100, integer: true }),
+    offset: optionalNumeric({ default: 0, min: 0, integer: true }),
+    location: storageLocationSchema.optional(),
+    is_consumed: z
+      .string()
+      .optional()
+      .transform((val) => (val === 'true' ? true : val === 'false' ? false : undefined)),
+    expiring_within_days: z
+      .string()
+      .optional()
+      .transform((val) => (val ? parseInt(val, 10) : undefined))
+      .pipe(z.number().int().positive().optional()),
+    category_id: z
+      .string()
+      .optional()
+      .transform((val) => (val ? parseInt(val, 10) : undefined))
+      .pipe(z.number().int().positive().optional()),
+    search: z.string().max(100).optional(),
+    sort_by: z.enum(['expiry_date', 'purchase_date', 'item_name', 'created_at']).optional(),
+    sort_order: z.enum(['asc', 'desc']).optional(),
+  }),
+});
+
+/**
+ * Schema for alert settings update
+ */
+const updateAlertSettingsSchema = z.object({
+  params: z.object({
+    alertMethod: alertMethodSchema,
+  }),
+  body: z.object({
+    days_before_expiry: z.number().int().min(1).max(30).optional(),
+    is_enabled: z.boolean().optional(),
+  }),
+});
+
+/**
+ * Schema for days ahead parameter
+ */
+const daysAheadQuerySchema = z.object({
+  query: z.object({
+    days: z
+      .string()
+      .optional()
+      .default('7')
+      .transform((val) => parseInt(val, 10))
+      .pipe(z.number().int().min(1).max(90)),
+  }),
+});
+
+// Middleware to ensure user is authenticated for all inventory routes
+router.use(passport.authenticate('jwt', { session: false }));
+
+// ============================================================================
+// INVENTORY ITEM ENDPOINTS
+// ============================================================================
+
+/**
+ * @openapi
+ * /inventory:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get inventory items
+ *     description: Retrieve the user's pantry inventory with optional filtering and pagination.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: limit
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 100
+ *           default: 50
+ *       - in: query
+ *         name: offset
+ *         schema:
+ *           type: integer
+ *           minimum: 0
+ *           default: 0
+ *       - in: query
+ *         name: location
+ *         schema:
+ *           type: string
+ *           enum: [fridge, freezer, pantry, room_temp]
+ *       - in: query
+ *         name: is_consumed
+ *         schema:
+ *           type: boolean
+ *       - in: query
+ *         name: expiring_within_days
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *       - in: query
+ *         name: category_id
+ *         schema:
+ *           type: integer
+ *       - in: query
+ *         name: search
+ *         schema:
+ *           type: string
+ *           maxLength: 100
+ *       - in: query
+ *         name: sort_by
+ *         schema:
+ *           type: string
+ *           enum: [expiry_date, purchase_date, item_name, created_at]
+ *       - in: query
+ *         name: sort_order
+ *         schema:
+ *           type: string
+ *           enum: [asc, desc]
+ *     responses:
+ *       200:
+ *         description: Inventory items retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get(
+  '/',
+  validateRequest(inventoryQuerySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type InventoryQueryRequest = z.infer<typeof inventoryQuerySchema>;
+    const { query } = req as unknown as InventoryQueryRequest;
+
+    try {
+      const result = await expiryService.getInventory(
+        {
+          user_id: userProfile.user.user_id,
+          location: query.location,
+          is_consumed: query.is_consumed,
+          expiring_within_days: query.expiring_within_days,
+          category_id: query.category_id,
+          search: query.search,
+          limit: query.limit,
+          offset: query.offset,
+          sort_by: query.sort_by,
+          sort_order: query.sort_order,
+        },
+        req.log,
+      );
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching inventory');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory:
+ *   post:
+ *     tags: [Inventory]
+ *     summary: Add inventory item
+ *     description: Add a new item to the user's pantry inventory.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - item_name
+ *               - source
+ *             properties:
+ *               product_id:
+ *                 type: integer
+ *               master_item_id:
+ *                 type: integer
+ *               item_name:
+ *                 type: string
+ *                 maxLength: 255
+ *               quantity:
+ *                 type: number
+ *                 minimum: 0
+ *                 default: 1
+ *               unit:
+ *                 type: string
+ *                 maxLength: 50
+ *               purchase_date:
+ *                 type: string
+ *                 format: date
+ *               expiry_date:
+ *                 type: string
+ *                 format: date
+ *               source:
+ *                 type: string
+ *                 enum: [manual, receipt_scan, upc_scan]
+ *               location:
+ *                 type: string
+ *                 enum: [fridge, freezer, pantry, room_temp]
+ *               notes:
+ *                 type: string
+ *                 maxLength: 500
+ *     responses:
+ *       201:
+ *         description: Item added to inventory
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ */
+router.post(
+  '/',
+  validateRequest(addInventoryItemSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type AddItemRequest = z.infer<typeof addInventoryItemSchema>;
+    const { body } = req as unknown as AddItemRequest;
+
+    try {
+      req.log.info(
+        { userId: userProfile.user.user_id, itemName: body.item_name },
+        'Adding item to inventory',
+      );
+
+      const item = await expiryService.addInventoryItem(userProfile.user.user_id, body, req.log);
+      sendSuccess(res, item, 201);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, body },
+        'Error adding inventory item',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory/{inventoryId}:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get inventory item by ID
+ *     description: Retrieve a specific inventory item.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: inventoryId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Inventory item retrieved
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Item not found
+ */
+router.get(
+  '/:inventoryId',
+  validateRequest(inventoryIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetItemRequest = z.infer<typeof inventoryIdParamSchema>;
+    const { params } = req as unknown as GetItemRequest;
+
+    try {
+      const item = await expiryService.getInventoryItemById(
+        params.inventoryId,
+        userProfile.user.user_id,
+        req.log,
+      );
+      sendSuccess(res, item);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, inventoryId: params.inventoryId },
+        'Error fetching inventory item',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory/{inventoryId}:
+ *   put:
+ *     tags: [Inventory]
+ *     summary: Update inventory item
+ *     description: Update an existing inventory item.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: inventoryId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               quantity:
+ *                 type: number
+ *                 minimum: 0
+ *               unit:
+ *                 type: string
+ *                 maxLength: 50
+ *               expiry_date:
+ *                 type: string
+ *                 format: date
+ *               location:
+ *                 type: string
+ *                 enum: [fridge, freezer, pantry, room_temp]
+ *               notes:
+ *                 type: string
+ *                 maxLength: 500
+ *               is_consumed:
+ *                 type: boolean
+ *     responses:
+ *       200:
+ *         description: Item updated
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Item not found
+ */
+router.put(
+  '/:inventoryId',
+  validateRequest(updateInventoryItemSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type UpdateItemRequest = z.infer<typeof updateInventoryItemSchema>;
+    const { params, body } = req as unknown as UpdateItemRequest;
+
+    try {
+      const item = await expiryService.updateInventoryItem(
+        params.inventoryId,
+        userProfile.user.user_id,
+        body,
+        req.log,
+      );
+      sendSuccess(res, item);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, inventoryId: params.inventoryId },
+        'Error updating inventory item',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory/{inventoryId}:
+ *   delete:
+ *     tags: [Inventory]
+ *     summary: Delete inventory item
+ *     description: Remove an item from the user's inventory.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: inventoryId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       204:
+ *         description: Item deleted
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Item not found
+ */
+router.delete(
+  '/:inventoryId',
+  validateRequest(inventoryIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type DeleteItemRequest = z.infer<typeof inventoryIdParamSchema>;
+    const { params } = req as unknown as DeleteItemRequest;
+
+    try {
+      await expiryService.deleteInventoryItem(
+        params.inventoryId,
+        userProfile.user.user_id,
+        req.log,
+      );
+      sendNoContent(res);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, inventoryId: params.inventoryId },
+        'Error deleting inventory item',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory/{inventoryId}/consume:
+ *   post:
+ *     tags: [Inventory]
+ *     summary: Mark item as consumed
+ *     description: Mark an inventory item as consumed.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: inventoryId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       204:
+ *         description: Item marked as consumed
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Item not found
+ */
+router.post(
+  '/:inventoryId/consume',
+  validateRequest(inventoryIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ConsumeItemRequest = z.infer<typeof inventoryIdParamSchema>;
+    const { params } = req as unknown as ConsumeItemRequest;
+
+    try {
+      await expiryService.markItemConsumed(params.inventoryId, userProfile.user.user_id, req.log);
+      sendNoContent(res);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, inventoryId: params.inventoryId },
+        'Error marking item as consumed',
+      );
+      next(error);
+    }
+  },
+);
+
+// ============================================================================
+// EXPIRING ITEMS ENDPOINTS
+// ============================================================================
+
+/**
+ * @openapi
+ * /inventory/expiring/summary:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get expiring items summary
+ *     description: Get items grouped by expiry urgency (today, this week, this month, expired).
+ *     security:
+ *       - bearerAuth: []
+ *     responses:
+ *       200:
+ *         description: Expiring items grouped by urgency
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 expiring_today:
+ *                   type: array
+ *                 expiring_this_week:
+ *                   type: array
+ *                 expiring_this_month:
+ *                   type: array
+ *                 already_expired:
+ *                   type: array
+ *                 counts:
+ *                   type: object
+ *                   properties:
+ *                     today:
+ *                       type: integer
+ *                     this_week:
+ *                       type: integer
+ *                     this_month:
+ *                       type: integer
+ *                     expired:
+ *                       type: integer
+ *                     total:
+ *                       type: integer
+ *       401:
+ *         description: Unauthorized
+ */
+router.get('/expiring/summary', async (req: Request, res: Response, next: NextFunction) => {
+  const userProfile = req.user as UserProfile;
+
+  try {
+    const result = await expiryService.getExpiringItemsGrouped(userProfile.user.user_id, req.log);
+    sendSuccess(res, result);
+  } catch (error) {
+    req.log.error(
+      { error, userId: userProfile.user.user_id },
+      'Error fetching expiring items summary',
+    );
+    next(error);
+  }
+});
+
+/**
+ * @openapi
+ * /inventory/expiring:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get expiring items
+ *     description: Get items expiring within a specified number of days.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: days
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 90
+ *           default: 7
+ *         description: Number of days to look ahead
+ *     responses:
+ *       200:
+ *         description: Expiring items retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get(
+  '/expiring',
+  validateRequest(daysAheadQuerySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ExpiringItemsRequest = z.infer<typeof daysAheadQuerySchema>;
+    const { query } = req as unknown as ExpiringItemsRequest;
+
+    try {
+      const items = await expiryService.getExpiringItems(
+        userProfile.user.user_id,
+        query.days,
+        req.log,
+      );
+      sendSuccess(res, { items, total: items.length });
+    } catch (error) {
+      req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching expiring items');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /inventory/expired:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get expired items
+ *     description: Get all items that have already expired.
+ *     security:
+ *       - bearerAuth: []
+ *     responses:
+ *       200:
+ *         description: Expired items retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get('/expired', async (req: Request, res: Response, next: NextFunction) => {
+  const userProfile = req.user as UserProfile;
+
+  try {
+    const items = await expiryService.getExpiredItems(userProfile.user.user_id, req.log);
+    sendSuccess(res, { items, total: items.length });
+  } catch (error) {
+    req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching expired items');
+    next(error);
+  }
+});
+
+// ============================================================================
+// ALERT SETTINGS ENDPOINTS
+// ============================================================================
+
+/**
+ * @openapi
+ * /inventory/alerts:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get alert settings
+ *     description: Get the user's expiry alert settings.
+ *     security:
+ *       - bearerAuth: []
+ *     responses:
+ *       200:
+ *         description: Alert settings retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get('/alerts', async (req: Request, res: Response, next: NextFunction) => {
+  const userProfile = req.user as UserProfile;
+
+  try {
+    const settings = await expiryService.getAlertSettings(userProfile.user.user_id, req.log);
+    sendSuccess(res, settings);
+  } catch (error) {
+    req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching alert settings');
+    next(error);
+  }
+});
+
+/**
+ * @openapi
+ * /inventory/alerts/{alertMethod}:
+ *   put:
+ *     tags: [Inventory]
+ *     summary: Update alert settings
+ *     description: Update alert settings for a specific notification method.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: alertMethod
+ *         required: true
+ *         schema:
+ *           type: string
+ *           enum: [email, push, in_app]
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               days_before_expiry:
+ *                 type: integer
+ *                 minimum: 1
+ *                 maximum: 30
+ *               is_enabled:
+ *                 type: boolean
+ *     responses:
+ *       200:
+ *         description: Alert settings updated
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ */
+router.put(
+  '/alerts/:alertMethod',
+  validateRequest(updateAlertSettingsSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type UpdateAlertRequest = z.infer<typeof updateAlertSettingsSchema>;
+    const { params, body } = req as unknown as UpdateAlertRequest;
+
+    try {
+      const settings = await expiryService.updateAlertSettings(
+        userProfile.user.user_id,
+        params.alertMethod,
+        body,
+        req.log,
+      );
+      sendSuccess(res, settings);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, alertMethod: params.alertMethod },
+        'Error updating alert settings',
+      );
+      next(error);
+    }
+  },
+);
+
+// ============================================================================
+// RECIPE SUGGESTIONS ENDPOINT
+// ============================================================================
+
+/**
+ * @openapi
+ * /inventory/recipes/suggestions:
+ *   get:
+ *     tags: [Inventory]
+ *     summary: Get recipe suggestions for expiring items
+ *     description: Get recipes that use items expiring soon to reduce food waste.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: days
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 90
+ *           default: 7
+ *         description: Consider items expiring within this many days
+ *       - in: query
+ *         name: limit
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 50
+ *           default: 10
+ *       - in: query
+ *         name: offset
+ *         schema:
+ *           type: integer
+ *           minimum: 0
+ *           default: 0
+ *     responses:
+ *       200:
+ *         description: Recipe suggestions retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get(
+  '/recipes/suggestions',
+  validateRequest(
+    z.object({
+      query: z.object({
+        days: z
+          .string()
+          .optional()
+          .default('7')
+          .transform((val) => parseInt(val, 10))
+          .pipe(z.number().int().min(1).max(90)),
+        limit: optionalNumeric({ default: 10, min: 1, max: 50, integer: true }),
+        offset: optionalNumeric({ default: 0, min: 0, integer: true }),
+      }),
+    }),
+  ),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    const { query } = req as unknown as {
+      query: { days: number; limit?: number; offset?: number };
+    };
+
+    try {
+      const result = await expiryService.getRecipeSuggestionsForExpiringItems(
+        userProfile.user.user_id,
+        query.days,
+        req.log,
+        { limit: query.limit, offset: query.offset },
+      );
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id },
+        'Error fetching recipe suggestions',
+      );
+      next(error);
+    }
+  },
+);
+
+export default router;
--- a/src/routes/price.routes.ts
+++ b/src/routes/price.routes.ts
@@ -1,7 +1,7 @@
 // src/routes/price.routes.ts
 import { Router, Request, Response, NextFunction } from 'express';
 import { z } from 'zod';
-import passport from './passport.routes';
+import passport from '../config/passport';
 import { validateRequest } from '../middleware/validation.middleware';
 import { priceRepo } from '../services/db/price.db';
 import { optionalNumeric } from '../utils/zodUtils';
@@ -24,8 +24,48 @@ const priceHistorySchema = z.object({
 type PriceHistoryRequest = z.infer<typeof priceHistorySchema>;

 /**
- * POST /api/price-history - Fetches historical price data for a given list of master item IDs.
- * This endpoint retrieves price points over time for specified master grocery items.
+ * @openapi
+ * /price-history:
+ *   post:
+ *     tags: [Price]
+ *     summary: Get price history
+ *     description: Fetches historical price data for a given list of master item IDs.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - masterItemIds
+ *             properties:
+ *               masterItemIds:
+ *                 type: array
+ *                 items:
+ *                   type: integer
+ *                 minItems: 1
+ *                 description: Array of master item IDs to get price history for
+ *               limit:
+ *                 type: integer
+ *                 default: 1000
+ *                 description: Maximum number of price points to return
+ *               offset:
+ *                 type: integer
+ *                 default: 0
+ *                 description: Number of price points to skip
+ *     responses:
+ *       200:
+ *         description: Historical price data for specified items
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       400:
+ *         description: Validation error - masterItemIds must be a non-empty array
+ *       401:
+ *         description: Unauthorized - invalid or missing token
 */
 router.post(
  '/',
--- a/src/routes/reactions.routes.ts
+++ b/src/routes/reactions.routes.ts
@@ -2,7 +2,7 @@ import { Router, Request, Response, NextFunction } from 'express';
 import { z } from 'zod';
 import { reactionRepo } from '../services/db/index.db';
 import { validateRequest } from '../middleware/validation.middleware';
-import passport from './passport.routes';
+import passport from '../config/passport';
 import { requiredString } from '../utils/zodUtils';
 import { UserProfile } from '../types';
 import { publicReadLimiter, reactionToggleLimiter } from '../config/rateLimiters';
@@ -38,9 +38,36 @@ const getReactionSummarySchema = z.object({
 // --- Routes ---

 /**
- * GET /api/reactions - Fetches user reactions based on query filters.
- * Supports filtering by userId, entityType, and entityId.
- * This is a public endpoint.
+ * @openapi
+ * /reactions:
+ *   get:
+ *     tags: [Reactions]
+ *     summary: Get reactions
+ *     description: Fetches user reactions based on query filters. Supports filtering by userId, entityType, and entityId.
+ *     parameters:
+ *       - in: query
+ *         name: userId
+ *         schema:
+ *           type: string
+ *           format: uuid
+ *         description: Filter by user ID
+ *       - in: query
+ *         name: entityType
+ *         schema:
+ *           type: string
+ *         description: Filter by entity type (e.g., recipe, comment)
+ *       - in: query
+ *         name: entityId
+ *         schema:
+ *           type: string
+ *         description: Filter by entity ID
+ *     responses:
+ *       200:
+ *         description: List of reactions matching filters
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
 */
 router.get(
  '/',
@@ -59,9 +86,34 @@ router.get(
 );

 /**
- * GET /api/reactions/summary - Fetches a summary of reactions for a specific entity.
- * Example: /api/reactions/summary?entityType=recipe&entityId=123
- * This is a public endpoint.
+ * @openapi
+ * /reactions/summary:
+ *   get:
+ *     tags: [Reactions]
+ *     summary: Get reaction summary
+ *     description: Fetches a summary of reactions for a specific entity.
+ *     parameters:
+ *       - in: query
+ *         name: entityType
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Entity type (e.g., recipe, comment)
+ *       - in: query
+ *         name: entityId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Entity ID
+ *     responses:
+ *       200:
+ *         description: Reaction summary with counts by type
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       400:
+ *         description: Missing required query parameters
 */
 router.get(
  '/summary',
@@ -84,8 +136,41 @@ router.get(
 );

 /**
- * POST /api/reactions/toggle - Toggles a user's reaction to an entity.
- * This is a protected endpoint.
+ * @openapi
+ * /reactions/toggle:
+ *   post:
+ *     tags: [Reactions]
+ *     summary: Toggle reaction
+ *     description: Toggles a user's reaction to an entity. If the reaction exists, it's removed; otherwise, it's added.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - entity_type
+ *               - entity_id
+ *               - reaction_type
+ *             properties:
+ *               entity_type:
+ *                 type: string
+ *                 description: Entity type (e.g., recipe, comment)
+ *               entity_id:
+ *                 type: string
+ *                 description: Entity ID
+ *               reaction_type:
+ *                 type: string
+ *                 description: Type of reaction (e.g., like, love)
+ *     responses:
+ *       200:
+ *         description: Reaction removed
+ *       201:
+ *         description: Reaction added
+ *       401:
+ *         description: Unauthorized - invalid or missing token
 */
 router.post(
  '/toggle',
--- a/src/routes/receipt.routes.test.ts
+++ b/src/routes/receipt.routes.test.ts
@@ -0,0 +1,767 @@
+// src/routes/receipt.routes.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import request from 'supertest';
+import { createTestApp } from '../tests/utils/createTestApp';
+import { createMockUserProfile } from '../tests/utils/mockFactories';
+import receiptRouter from './receipt.routes';
+import type { ReceiptStatus, ReceiptItemStatus } from '../types/expiry';
+
+// Mock passport
+vi.mock('../config/passport', () => ({
+  default: {
+    authenticate: vi.fn(() => (req: any, res: any, next: any) => {
+      if (mockUser) {
+        req.user = mockUser;
+        next();
+      } else {
+        res.status(401).json({ success: false, error: { message: 'Unauthorized' } });
+      }
+    }),
+  },
+}));
+
+// Mock receipt service
+vi.mock('../services/receiptService.server', () => ({
+  getReceipts: vi.fn(),
+  createReceipt: vi.fn(),
+  getReceiptById: vi.fn(),
+  deleteReceipt: vi.fn(),
+  getReceiptItems: vi.fn(),
+  updateReceiptItem: vi.fn(),
+  getUnaddedItems: vi.fn(),
+  getProcessingLogs: vi.fn(),
+}));
+
+// Mock expiry service
+vi.mock('../services/expiryService.server', () => ({
+  addItemsFromReceipt: vi.fn(),
+}));
+
+// Mock receipt queue
+vi.mock('../services/queues.server', () => ({
+  receiptQueue: {
+    add: vi.fn(),
+  },
+}));
+
+// Mock multer middleware
+vi.mock('../middleware/multer.middleware', () => ({
+  createUploadMiddleware: vi.fn(() => ({
+    single: vi.fn(() => (req: any, _res: any, next: any) => {
+      // Simulate file upload
+      if (mockFile) {
+        req.file = mockFile;
+      }
+      next();
+    }),
+  })),
+  handleMulterError: vi.fn((err: any, _req: any, res: any, next: any) => {
+    if (err) {
+      return res.status(400).json({ success: false, error: { message: err.message } });
+    }
+    next();
+  }),
+}));
+
+// Mock file upload middleware
+vi.mock('../middleware/fileUpload.middleware', () => ({
+  requireFileUpload: vi.fn(() => (req: any, res: any, next: any) => {
+    if (!req.file) {
+      return res.status(400).json({
+        success: false,
+        error: { message: 'File is required' },
+      });
+    }
+    next();
+  }),
+}));
+
+import * as receiptService from '../services/receiptService.server';
+import * as expiryService from '../services/expiryService.server';
+import { receiptQueue } from '../services/queues.server';
+
+// Test state
+let mockUser: ReturnType<typeof createMockUserProfile> | null = null;
+let mockFile: Express.Multer.File | null = null;
+
+// Helper to create mock receipt (ReceiptScan type)
+function createMockReceipt(overrides: { status?: ReceiptStatus; [key: string]: unknown } = {}) {
+  return {
+    receipt_id: 1,
+    user_id: 'user-123',
+    receipt_image_url: '/uploads/receipts/receipt-123.jpg',
+    store_id: null,
+    transaction_date: null,
+    total_amount_cents: null,
+    status: 'pending' as ReceiptStatus,
+    raw_text: null,
+    store_confidence: null,
+    ocr_provider: null,
+    error_details: null,
+    retry_count: 0,
+    ocr_confidence: null,
+    currency: 'USD',
+    created_at: '2024-01-15T10:00:00Z',
+    processed_at: null,
+    updated_at: '2024-01-15T10:00:00Z',
+    ...overrides,
+  };
+}
+
+// Helper to create mock receipt item (ReceiptItem type)
+function createMockReceiptItem(
+  overrides: { status?: ReceiptItemStatus; [key: string]: unknown } = {},
+) {
+  return {
+    receipt_item_id: 1,
+    receipt_id: 1,
+    raw_item_description: 'MILK 2% 4L',
+    quantity: 1,
+    price_paid_cents: 599,
+    master_item_id: null,
+    product_id: null,
+    status: 'unmatched' as ReceiptItemStatus,
+    line_number: 1,
+    match_confidence: null,
+    is_discount: false,
+    unit_price_cents: null,
+    unit_type: null,
+    added_to_pantry: false,
+    pantry_item_id: null,
+    upc_code: null,
+    created_at: '2024-01-15T10:00:00Z',
+    updated_at: '2024-01-15T10:00:00Z',
+    ...overrides,
+  };
+}
+
+// Helper to create mock processing log (ReceiptProcessingLogRecord type)
+function createMockProcessingLog(overrides: Record<string, unknown> = {}) {
+  return {
+    log_id: 1,
+    receipt_id: 1,
+    processing_step: 'upload' as const,
+    status: 'completed' as const,
+    provider: null,
+    duration_ms: null,
+    tokens_used: null,
+    cost_cents: null,
+    input_data: null,
+    output_data: null,
+    error_message: null,
+    created_at: '2024-01-15T10:00:00Z',
+    ...overrides,
+  };
+}
+
+describe('Receipt Routes', () => {
+  let app: ReturnType<typeof createTestApp>;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockUser = createMockUserProfile();
+    mockFile = null;
+    app = createTestApp({
+      router: receiptRouter,
+      basePath: '/receipts',
+      authenticatedUser: mockUser,
+    });
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+    mockUser = null;
+    mockFile = null;
+  });
+
+  describe('GET /receipts', () => {
+    it('should return user receipts with default pagination', async () => {
+      const mockReceipts = [createMockReceipt(), createMockReceipt({ receipt_id: 2 })];
+      vi.mocked(receiptService.getReceipts).mockResolvedValueOnce({
+        receipts: mockReceipts,
+        total: 2,
+      });
+
+      const response = await request(app).get('/receipts');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipts).toHaveLength(2);
+      expect(receiptService.getReceipts).toHaveBeenCalledWith(
+        expect.objectContaining({
+          user_id: mockUser!.user.user_id,
+          limit: 50,
+          offset: 0,
+        }),
+        expect.anything(),
+      );
+    });
+
+    it('should support status filter', async () => {
+      vi.mocked(receiptService.getReceipts).mockResolvedValueOnce({
+        receipts: [createMockReceipt({ status: 'completed' })],
+        total: 1,
+      });
+
+      const response = await request(app).get('/receipts?status=completed');
+
+      expect(response.status).toBe(200);
+      expect(receiptService.getReceipts).toHaveBeenCalledWith(
+        expect.objectContaining({ status: 'completed' }),
+        expect.anything(),
+      );
+    });
+
+    it('should support store_id filter', async () => {
+      vi.mocked(receiptService.getReceipts).mockResolvedValueOnce({
+        receipts: [createMockReceipt({ store_id: 5 })],
+        total: 1,
+      });
+
+      const response = await request(app).get('/receipts?store_id=5');
+
+      expect(response.status).toBe(200);
+      expect(receiptService.getReceipts).toHaveBeenCalledWith(
+        expect.objectContaining({ store_id: 5 }),
+        expect.anything(),
+      );
+    });
+
+    it('should support date range filter', async () => {
+      vi.mocked(receiptService.getReceipts).mockResolvedValueOnce({
+        receipts: [],
+        total: 0,
+      });
+
+      const response = await request(app).get('/receipts?from_date=2024-01-01&to_date=2024-01-31');
+
+      expect(response.status).toBe(200);
+      expect(receiptService.getReceipts).toHaveBeenCalledWith(
+        expect.objectContaining({
+          from_date: '2024-01-01',
+          to_date: '2024-01-31',
+        }),
+        expect.anything(),
+      );
+    });
+
+    it('should support pagination', async () => {
+      vi.mocked(receiptService.getReceipts).mockResolvedValueOnce({
+        receipts: [],
+        total: 100,
+      });
+
+      const response = await request(app).get('/receipts?limit=10&offset=20');
+
+      expect(response.status).toBe(200);
+      expect(receiptService.getReceipts).toHaveBeenCalledWith(
+        expect.objectContaining({ limit: 10, offset: 20 }),
+        expect.anything(),
+      );
+    });
+
+    it('should reject invalid status', async () => {
+      const response = await request(app).get('/receipts?status=invalid');
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should handle service error', async () => {
+      vi.mocked(receiptService.getReceipts).mockRejectedValueOnce(new Error('DB error'));
+
+      const response = await request(app).get('/receipts');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('POST /receipts', () => {
+    beforeEach(() => {
+      mockFile = {
+        fieldname: 'receipt',
+        originalname: 'receipt.jpg',
+        encoding: '7bit',
+        mimetype: 'image/jpeg',
+        destination: '/uploads/receipts',
+        filename: 'receipt-123.jpg',
+        path: '/uploads/receipts/receipt-123.jpg',
+        size: 1024000,
+      } as Express.Multer.File;
+    });
+
+    it('should upload receipt and queue for processing', async () => {
+      const mockReceipt = createMockReceipt();
+      vi.mocked(receiptService.createReceipt).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptQueue.add).mockResolvedValueOnce({ id: 'job-123' } as any);
+
+      const response = await request(app)
+        .post('/receipts')
+        .field('store_id', '1')
+        .field('transaction_date', '2024-01-15');
+
+      expect(response.status).toBe(201);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipt_id).toBe(1);
+      expect(response.body.data.job_id).toBe('job-123');
+      expect(receiptService.createReceipt).toHaveBeenCalledWith(
+        mockUser!.user.user_id,
+        '/uploads/receipts/receipt-123.jpg',
+        expect.anything(),
+        expect.objectContaining({
+          storeId: 1,
+          transactionDate: '2024-01-15',
+        }),
+      );
+      expect(receiptQueue.add).toHaveBeenCalledWith(
+        'process-receipt',
+        expect.objectContaining({
+          receiptId: 1,
+          userId: mockUser!.user.user_id,
+          imagePath: '/uploads/receipts/receipt-123.jpg',
+        }),
+        expect.objectContaining({
+          jobId: 'receipt-1',
+        }),
+      );
+    });
+
+    it('should upload receipt without optional fields', async () => {
+      const mockReceipt = createMockReceipt();
+      vi.mocked(receiptService.createReceipt).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptQueue.add).mockResolvedValueOnce({ id: 'job-456' } as any);
+
+      const response = await request(app).post('/receipts');
+
+      expect(response.status).toBe(201);
+      expect(receiptService.createReceipt).toHaveBeenCalledWith(
+        mockUser!.user.user_id,
+        '/uploads/receipts/receipt-123.jpg',
+        expect.anything(),
+        expect.objectContaining({
+          storeId: undefined,
+          transactionDate: undefined,
+        }),
+      );
+    });
+
+    it('should reject request without file', async () => {
+      mockFile = null;
+
+      const response = await request(app).post('/receipts');
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.message).toContain('File is required');
+    });
+
+    it('should handle service error', async () => {
+      vi.mocked(receiptService.createReceipt).mockRejectedValueOnce(new Error('Storage error'));
+
+      const response = await request(app).post('/receipts');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /receipts/:receiptId', () => {
+    it('should return receipt with items', async () => {
+      const mockReceipt = createMockReceipt();
+      const mockItems = [createMockReceiptItem(), createMockReceiptItem({ receipt_item_id: 2 })];
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getReceiptItems).mockResolvedValueOnce(mockItems);
+
+      const response = await request(app).get('/receipts/1');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipt.receipt_id).toBe(1);
+      expect(response.body.data.items).toHaveLength(2);
+      expect(receiptService.getReceiptById).toHaveBeenCalledWith(
+        1,
+        mockUser!.user.user_id,
+        expect.anything(),
+      );
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const notFoundError = new Error('Receipt not found');
+      (notFoundError as any).statusCode = 404;
+      vi.mocked(receiptService.getReceiptById).mockRejectedValueOnce(notFoundError);
+
+      const response = await request(app).get('/receipts/999');
+
+      expect(response.status).toBe(404);
+    });
+
+    it('should reject invalid receipt ID', async () => {
+      const response = await request(app).get('/receipts/invalid');
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('DELETE /receipts/:receiptId', () => {
+    it('should delete receipt successfully', async () => {
+      vi.mocked(receiptService.deleteReceipt).mockResolvedValueOnce(undefined);
+
+      const response = await request(app).delete('/receipts/1');
+
+      expect(response.status).toBe(204);
+      expect(receiptService.deleteReceipt).toHaveBeenCalledWith(
+        1,
+        mockUser!.user.user_id,
+        expect.anything(),
+      );
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const notFoundError = new Error('Receipt not found');
+      (notFoundError as any).statusCode = 404;
+      vi.mocked(receiptService.deleteReceipt).mockRejectedValueOnce(notFoundError);
+
+      const response = await request(app).delete('/receipts/999');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('POST /receipts/:receiptId/reprocess', () => {
+    it('should queue receipt for reprocessing', async () => {
+      const mockReceipt = createMockReceipt({ status: 'failed' });
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptQueue.add).mockResolvedValueOnce({ id: 'reprocess-job-123' } as any);
+
+      const response = await request(app).post('/receipts/1/reprocess');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.message).toContain('reprocessing');
+      expect(response.body.data.job_id).toBe('reprocess-job-123');
+      expect(receiptQueue.add).toHaveBeenCalledWith(
+        'process-receipt',
+        expect.objectContaining({
+          receiptId: 1,
+          imagePath: mockReceipt.receipt_image_url,
+        }),
+        expect.objectContaining({
+          jobId: expect.stringMatching(/^receipt-1-reprocess-\d+$/),
+        }),
+      );
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const notFoundError = new Error('Receipt not found');
+      (notFoundError as any).statusCode = 404;
+      vi.mocked(receiptService.getReceiptById).mockRejectedValueOnce(notFoundError);
+
+      const response = await request(app).post('/receipts/999/reprocess');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('GET /receipts/:receiptId/items', () => {
+    it('should return receipt items', async () => {
+      const mockReceipt = createMockReceipt();
+      const mockItems = [
+        createMockReceiptItem(),
+        createMockReceiptItem({ receipt_item_id: 2, parsed_name: 'Bread' }),
+      ];
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getReceiptItems).mockResolvedValueOnce(mockItems);
+
+      const response = await request(app).get('/receipts/1/items');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.items).toHaveLength(2);
+      expect(response.body.data.total).toBe(2);
+    });
+
+    it('should return 404 if receipt not found', async () => {
+      const notFoundError = new Error('Receipt not found');
+      (notFoundError as any).statusCode = 404;
+      vi.mocked(receiptService.getReceiptById).mockRejectedValueOnce(notFoundError);
+
+      const response = await request(app).get('/receipts/999/items');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('PUT /receipts/:receiptId/items/:itemId', () => {
+    it('should update receipt item status', async () => {
+      const mockReceipt = createMockReceipt();
+      const updatedItem = createMockReceiptItem({ status: 'matched', match_confidence: 0.95 });
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.updateReceiptItem).mockResolvedValueOnce(updatedItem);
+
+      const response = await request(app)
+        .put('/receipts/1/items/1')
+        .send({ status: 'matched', match_confidence: 0.95 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.status).toBe('matched');
+      expect(receiptService.updateReceiptItem).toHaveBeenCalledWith(
+        1,
+        expect.objectContaining({ status: 'matched', match_confidence: 0.95 }),
+        expect.anything(),
+      );
+    });
+
+    it('should update item with master_item_id', async () => {
+      const mockReceipt = createMockReceipt();
+      const updatedItem = createMockReceiptItem({ master_item_id: 42 });
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.updateReceiptItem).mockResolvedValueOnce(updatedItem);
+
+      const response = await request(app).put('/receipts/1/items/1').send({ master_item_id: 42 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.master_item_id).toBe(42);
+    });
+
+    it('should reject empty update body', async () => {
+      const response = await request(app).put('/receipts/1/items/1').send({});
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject invalid status value', async () => {
+      const response = await request(app)
+        .put('/receipts/1/items/1')
+        .send({ status: 'invalid_status' });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject invalid match_confidence', async () => {
+      const response = await request(app)
+        .put('/receipts/1/items/1')
+        .send({ match_confidence: 1.5 });
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('GET /receipts/:receiptId/items/unadded', () => {
+    it('should return unadded items', async () => {
+      const mockReceipt = createMockReceipt();
+      const mockItems = [
+        createMockReceiptItem({ added_to_inventory: false }),
+        createMockReceiptItem({ receipt_item_id: 2, added_to_inventory: false }),
+      ];
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getUnaddedItems).mockResolvedValueOnce(mockItems);
+
+      const response = await request(app).get('/receipts/1/items/unadded');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.items).toHaveLength(2);
+      expect(response.body.data.total).toBe(2);
+    });
+
+    it('should return empty array when all items added', async () => {
+      const mockReceipt = createMockReceipt();
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getUnaddedItems).mockResolvedValueOnce([]);
+
+      const response = await request(app).get('/receipts/1/items/unadded');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toHaveLength(0);
+      expect(response.body.data.total).toBe(0);
+    });
+  });
+
+  describe('POST /receipts/:receiptId/confirm', () => {
+    it('should confirm items for inventory', async () => {
+      const addedItems = [
+        { inventory_id: 1, item_name: 'Milk 2%', quantity: 1 },
+        { inventory_id: 2, item_name: 'Bread', quantity: 2 },
+      ];
+
+      vi.mocked(expiryService.addItemsFromReceipt).mockResolvedValueOnce(addedItems as any);
+
+      const response = await request(app)
+        .post('/receipts/1/confirm')
+        .send({
+          items: [
+            { receipt_item_id: 1, include: true, location: 'fridge' },
+            { receipt_item_id: 2, include: true, location: 'pantry', expiry_date: '2024-01-20' },
+            { receipt_item_id: 3, include: false },
+          ],
+        });
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.added_items).toHaveLength(2);
+      expect(response.body.data.count).toBe(2);
+      expect(expiryService.addItemsFromReceipt).toHaveBeenCalledWith(
+        mockUser!.user.user_id,
+        1,
+        expect.arrayContaining([
+          expect.objectContaining({ receipt_item_id: 1, include: true }),
+          expect.objectContaining({ receipt_item_id: 2, include: true }),
+          expect.objectContaining({ receipt_item_id: 3, include: false }),
+        ]),
+        expect.anything(),
+      );
+    });
+
+    it('should accept custom item_name and quantity', async () => {
+      vi.mocked(expiryService.addItemsFromReceipt).mockResolvedValueOnce([
+        { inventory_id: 1, item_name: 'Custom Name', quantity: 5 },
+      ] as any);
+
+      const response = await request(app)
+        .post('/receipts/1/confirm')
+        .send({
+          items: [
+            {
+              receipt_item_id: 1,
+              include: true,
+              item_name: 'Custom Name',
+              quantity: 5,
+              location: 'pantry',
+            },
+          ],
+        });
+
+      expect(response.status).toBe(200);
+      expect(expiryService.addItemsFromReceipt).toHaveBeenCalledWith(
+        mockUser!.user.user_id,
+        1,
+        expect.arrayContaining([
+          expect.objectContaining({
+            item_name: 'Custom Name',
+            quantity: 5,
+          }),
+        ]),
+        expect.anything(),
+      );
+    });
+
+    it('should reject empty items array', async () => {
+      const response = await request(app).post('/receipts/1/confirm').send({ items: [] });
+
+      // Empty array is technically valid, service decides what to do
+      expect(response.status).toBe(200);
+    });
+
+    it('should reject missing items field', async () => {
+      const response = await request(app).post('/receipts/1/confirm').send({});
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject invalid location', async () => {
+      const response = await request(app)
+        .post('/receipts/1/confirm')
+        .send({
+          items: [{ receipt_item_id: 1, include: true, location: 'invalid_location' }],
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject invalid expiry_date format', async () => {
+      const response = await request(app)
+        .post('/receipts/1/confirm')
+        .send({
+          items: [{ receipt_item_id: 1, include: true, expiry_date: 'not-a-date' }],
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should handle service error', async () => {
+      vi.mocked(expiryService.addItemsFromReceipt).mockRejectedValueOnce(
+        new Error('Failed to add items'),
+      );
+
+      const response = await request(app)
+        .post('/receipts/1/confirm')
+        .send({
+          items: [{ receipt_item_id: 1, include: true }],
+        });
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /receipts/:receiptId/logs', () => {
+    it('should return processing logs', async () => {
+      const mockReceipt = createMockReceipt();
+      const mockLogs = [
+        createMockProcessingLog({
+          processing_step: 'ocr_extraction' as const,
+          status: 'completed' as const,
+        }),
+        createMockProcessingLog({
+          log_id: 2,
+          processing_step: 'item_extraction' as const,
+          status: 'completed' as const,
+        }),
+        createMockProcessingLog({
+          log_id: 3,
+          processing_step: 'item_matching' as const,
+          status: 'started' as const,
+        }),
+      ];
+
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getProcessingLogs).mockResolvedValueOnce(mockLogs);
+
+      const response = await request(app).get('/receipts/1/logs');
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.logs).toHaveLength(3);
+      expect(response.body.data.total).toBe(3);
+    });
+
+    it('should return empty logs for new receipt', async () => {
+      const mockReceipt = createMockReceipt();
+      vi.mocked(receiptService.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptService.getProcessingLogs).mockResolvedValueOnce([]);
+
+      const response = await request(app).get('/receipts/1/logs');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.logs).toHaveLength(0);
+      expect(response.body.data.total).toBe(0);
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const notFoundError = new Error('Receipt not found');
+      (notFoundError as any).statusCode = 404;
+      vi.mocked(receiptService.getReceiptById).mockRejectedValueOnce(notFoundError);
+
+      const response = await request(app).get('/receipts/999/logs');
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('Authentication', () => {
+    it('should reject unauthenticated requests', async () => {
+      mockUser = null;
+      app = createTestApp({
+        router: receiptRouter,
+        basePath: '/receipts',
+        authenticatedUser: undefined,
+      });
+
+      const response = await request(app).get('/receipts');
+
+      expect(response.status).toBe(401);
+    });
+  });
+});
--- a/src/routes/receipt.routes.ts
+++ b/src/routes/receipt.routes.ts
@@ -0,0 +1,814 @@
+// src/routes/receipt.routes.ts
+/**
+ * @file Receipt Scanning API Routes
+ * Provides endpoints for uploading, processing, and managing scanned receipts.
+ */
+import express, { Request, Response, NextFunction } from 'express';
+import { z } from 'zod';
+import passport from '../config/passport';
+import type { UserProfile } from '../types';
+import { validateRequest } from '../middleware/validation.middleware';
+import { numericIdParam, optionalNumeric } from '../utils/zodUtils';
+import { sendSuccess, sendNoContent } from '../utils/apiResponse';
+import * as receiptService from '../services/receiptService.server';
+import * as expiryService from '../services/expiryService.server';
+import { createUploadMiddleware, handleMulterError } from '../middleware/multer.middleware';
+import { receiptQueue } from '../services/queues.server';
+import { requireFileUpload } from '../middleware/fileUpload.middleware';
+
+const router = express.Router();
+
+// Configure multer for receipt image uploads (max 10MB)
+const receiptUpload = createUploadMiddleware({
+  storageType: 'receipt',
+  fileSize: 10 * 1024 * 1024, // 10MB
+  fileFilter: 'image',
+});
+
+// --- Zod Schemas for Receipt Routes ---
+
+/**
+ * Receipt status validation
+ */
+const receiptStatusSchema = z.enum(['pending', 'processing', 'completed', 'failed']);
+
+/**
+ * Receipt item status validation
+ */
+const receiptItemStatusSchema = z.enum(['unmatched', 'matched', 'needs_review', 'ignored']);
+
+/**
+ * Storage location validation (for adding items to inventory)
+ */
+const storageLocationSchema = z.enum(['fridge', 'freezer', 'pantry', 'room_temp']);
+
+/**
+ * Schema for receipt ID parameter
+ */
+const receiptIdParamSchema = numericIdParam(
+  'receiptId',
+  "Invalid ID for parameter 'receiptId'. Must be a number.",
+);
+
+/**
+ * Schema for receipt item ID parameter
+ */
+const _receiptItemIdParamSchema = numericIdParam(
+  'itemId',
+  "Invalid ID for parameter 'itemId'. Must be a number.",
+);
+
+/**
+ * Schema for uploading a receipt (used with file upload, not base64)
+ */
+const uploadReceiptSchema = z.object({
+  body: z.object({
+    store_id: z
+      .string()
+      .optional()
+      .transform((val) => (val ? parseInt(val, 10) : undefined))
+      .pipe(z.number().int().positive().optional()),
+    transaction_date: z.string().date('Transaction date must be in YYYY-MM-DD format.').optional(),
+  }),
+});
+
+/**
+ * Schema for receipt query
+ */
+const receiptQuerySchema = z.object({
+  query: z.object({
+    limit: optionalNumeric({ default: 50, min: 1, max: 100, integer: true }),
+    offset: optionalNumeric({ default: 0, min: 0, integer: true }),
+    status: receiptStatusSchema.optional(),
+    store_id: z
+      .string()
+      .optional()
+      .transform((val) => (val ? parseInt(val, 10) : undefined))
+      .pipe(z.number().int().positive().optional()),
+    from_date: z.string().date().optional(),
+    to_date: z.string().date().optional(),
+  }),
+});
+
+/**
+ * Schema for updating a receipt item
+ */
+const updateReceiptItemSchema = z.object({
+  params: z.object({
+    receiptId: z.coerce.number().int().positive(),
+    itemId: z.coerce.number().int().positive(),
+  }),
+  body: z
+    .object({
+      status: receiptItemStatusSchema.optional(),
+      master_item_id: z.number().int().positive().nullable().optional(),
+      product_id: z.number().int().positive().nullable().optional(),
+      match_confidence: z.number().min(0).max(1).optional(),
+    })
+    .refine((data) => Object.keys(data).length > 0, {
+      message: 'At least one field to update must be provided.',
+    }),
+});
+
+/**
+ * Schema for confirming receipt items to add to inventory
+ */
+const confirmItemsSchema = z.object({
+  params: z.object({
+    receiptId: z.coerce.number().int().positive(),
+  }),
+  body: z.object({
+    items: z.array(
+      z.object({
+        receipt_item_id: z.number().int().positive(),
+        item_name: z.string().max(255).optional(),
+        quantity: z.number().positive().optional(),
+        location: storageLocationSchema.optional(),
+        expiry_date: z.string().date().optional(),
+        include: z.boolean(),
+      }),
+    ),
+  }),
+});
+
+// Middleware to ensure user is authenticated for all receipt routes
+router.use(passport.authenticate('jwt', { session: false }));
+
+// ============================================================================
+// RECEIPT MANAGEMENT ENDPOINTS
+// ============================================================================
+
+/**
+ * @openapi
+ * /receipts:
+ *   get:
+ *     tags: [Receipts]
+ *     summary: Get user's receipts
+ *     description: Retrieve the user's scanned receipts with optional filtering.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: limit
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 100
+ *           default: 50
+ *       - in: query
+ *         name: offset
+ *         schema:
+ *           type: integer
+ *           minimum: 0
+ *           default: 0
+ *       - in: query
+ *         name: status
+ *         schema:
+ *           type: string
+ *           enum: [pending, processing, completed, failed]
+ *       - in: query
+ *         name: store_id
+ *         schema:
+ *           type: integer
+ *       - in: query
+ *         name: from_date
+ *         schema:
+ *           type: string
+ *           format: date
+ *       - in: query
+ *         name: to_date
+ *         schema:
+ *           type: string
+ *           format: date
+ *     responses:
+ *       200:
+ *         description: Receipts retrieved
+ *       401:
+ *         description: Unauthorized
+ */
+router.get(
+  '/',
+  validateRequest(receiptQuerySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ReceiptQueryRequest = z.infer<typeof receiptQuerySchema>;
+    const { query } = req as unknown as ReceiptQueryRequest;
+
+    try {
+      const result = await receiptService.getReceipts(
+        {
+          user_id: userProfile.user.user_id,
+          status: query.status,
+          store_id: query.store_id,
+          from_date: query.from_date,
+          to_date: query.to_date,
+          limit: query.limit,
+          offset: query.offset,
+        },
+        req.log,
+      );
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching receipts');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts:
+ *   post:
+ *     tags: [Receipts]
+ *     summary: Upload a receipt
+ *     description: Upload a receipt image for processing and item extraction.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - receipt
+ *             properties:
+ *               receipt:
+ *                 type: string
+ *                 format: binary
+ *                 description: Receipt image file
+ *               store_id:
+ *                 type: integer
+ *                 description: Store ID if known
+ *               transaction_date:
+ *                 type: string
+ *                 format: date
+ *                 description: Transaction date if known (YYYY-MM-DD)
+ *     responses:
+ *       201:
+ *         description: Receipt uploaded and queued for processing
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ */
+router.post(
+  '/',
+  receiptUpload.single('receipt'),
+  requireFileUpload('receipt'),
+  validateRequest(uploadReceiptSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type UploadReceiptRequest = z.infer<typeof uploadReceiptSchema>;
+    const { body } = req as unknown as UploadReceiptRequest;
+    const file = req.file as Express.Multer.File;
+
+    try {
+      req.log.info(
+        { userId: userProfile.user.user_id, filename: file.filename },
+        'Uploading receipt',
+      );
+
+      // Create receipt record with the actual file path
+      const receipt = await receiptService.createReceipt(
+        userProfile.user.user_id,
+        file.path, // Use the actual file path from multer
+        req.log,
+        {
+          storeId: body.store_id,
+          transactionDate: body.transaction_date,
+        },
+      );
+
+      // Queue the receipt for processing via BullMQ
+      const bindings = req.log.bindings?.() || {};
+      const job = await receiptQueue.add(
+        'process-receipt',
+        {
+          receiptId: receipt.receipt_id,
+          userId: userProfile.user.user_id,
+          imagePath: file.path,
+          meta: {
+            requestId: bindings.request_id as string | undefined,
+            userId: userProfile.user.user_id,
+            origin: 'api',
+          },
+        },
+        {
+          jobId: `receipt-${receipt.receipt_id}`,
+        },
+      );
+
+      req.log.info(
+        { receiptId: receipt.receipt_id, jobId: job.id },
+        'Receipt queued for processing',
+      );
+
+      sendSuccess(res, { ...receipt, job_id: job.id }, 201);
+    } catch (error) {
+      req.log.error({ error, userId: userProfile.user.user_id }, 'Error uploading receipt');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}:
+ *   get:
+ *     tags: [Receipts]
+ *     summary: Get receipt by ID
+ *     description: Retrieve a specific receipt with its extracted items.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Receipt retrieved
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.get(
+  '/:receiptId',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetReceiptRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as GetReceiptRequest;
+
+    try {
+      const receipt = await receiptService.getReceiptById(
+        params.receiptId,
+        userProfile.user.user_id,
+        req.log,
+      );
+
+      // Also get the items
+      const items = await receiptService.getReceiptItems(params.receiptId, req.log);
+
+      sendSuccess(res, { receipt, items });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error fetching receipt',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}:
+ *   delete:
+ *     tags: [Receipts]
+ *     summary: Delete receipt
+ *     description: Delete a receipt and all associated data.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       204:
+ *         description: Receipt deleted
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.delete(
+  '/:receiptId',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type DeleteReceiptRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as DeleteReceiptRequest;
+
+    try {
+      await receiptService.deleteReceipt(params.receiptId, userProfile.user.user_id, req.log);
+      sendNoContent(res);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error deleting receipt',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/reprocess:
+ *   post:
+ *     tags: [Receipts]
+ *     summary: Reprocess receipt
+ *     description: Queue a failed receipt for reprocessing.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Receipt queued for reprocessing
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.post(
+  '/:receiptId/reprocess',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ReprocessReceiptRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as ReprocessReceiptRequest;
+
+    try {
+      // Verify the receipt exists and belongs to user
+      const receipt = await receiptService.getReceiptById(
+        params.receiptId,
+        userProfile.user.user_id,
+        req.log,
+      );
+
+      // Queue for reprocessing via BullMQ
+      const bindings = req.log.bindings?.() || {};
+      const job = await receiptQueue.add(
+        'process-receipt',
+        {
+          receiptId: receipt.receipt_id,
+          userId: userProfile.user.user_id,
+          imagePath: receipt.receipt_image_url, // Use stored image path
+          meta: {
+            requestId: bindings.request_id as string | undefined,
+            userId: userProfile.user.user_id,
+            origin: 'api-reprocess',
+          },
+        },
+        {
+          jobId: `receipt-${receipt.receipt_id}-reprocess-${Date.now()}`,
+        },
+      );
+
+      req.log.info(
+        { receiptId: params.receiptId, jobId: job.id },
+        'Receipt queued for reprocessing',
+      );
+
+      sendSuccess(res, {
+        message: 'Receipt queued for reprocessing',
+        receipt_id: receipt.receipt_id,
+        job_id: job.id,
+      });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error reprocessing receipt',
+      );
+      next(error);
+    }
+  },
+);
+
+// ============================================================================
+// RECEIPT ITEMS ENDPOINTS
+// ============================================================================
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/items:
+ *   get:
+ *     tags: [Receipts]
+ *     summary: Get receipt items
+ *     description: Get all extracted items from a receipt.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Receipt items retrieved
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.get(
+  '/:receiptId/items',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetItemsRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as GetItemsRequest;
+
+    try {
+      // Verify receipt belongs to user
+      await receiptService.getReceiptById(params.receiptId, userProfile.user.user_id, req.log);
+
+      const items = await receiptService.getReceiptItems(params.receiptId, req.log);
+      sendSuccess(res, { items, total: items.length });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error fetching receipt items',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/items/{itemId}:
+ *   put:
+ *     tags: [Receipts]
+ *     summary: Update receipt item
+ *     description: Update a receipt item's matching status or linked product.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *       - in: path
+ *         name: itemId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               status:
+ *                 type: string
+ *                 enum: [unmatched, matched, needs_review, ignored]
+ *               master_item_id:
+ *                 type: integer
+ *                 nullable: true
+ *               product_id:
+ *                 type: integer
+ *                 nullable: true
+ *               match_confidence:
+ *                 type: number
+ *                 minimum: 0
+ *                 maximum: 1
+ *     responses:
+ *       200:
+ *         description: Item updated
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt or item not found
+ */
+router.put(
+  '/:receiptId/items/:itemId',
+  validateRequest(updateReceiptItemSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type UpdateItemRequest = z.infer<typeof updateReceiptItemSchema>;
+    const { params, body } = req as unknown as UpdateItemRequest;
+
+    try {
+      // Verify receipt belongs to user
+      await receiptService.getReceiptById(params.receiptId, userProfile.user.user_id, req.log);
+
+      const item = await receiptService.updateReceiptItem(params.itemId, body, req.log);
+      sendSuccess(res, item);
+    } catch (error) {
+      req.log.error(
+        {
+          error,
+          userId: userProfile.user.user_id,
+          receiptId: params.receiptId,
+          itemId: params.itemId,
+        },
+        'Error updating receipt item',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/items/unadded:
+ *   get:
+ *     tags: [Receipts]
+ *     summary: Get unadded items
+ *     description: Get receipt items that haven't been added to inventory yet.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Unadded items retrieved
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.get(
+  '/:receiptId/items/unadded',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetUnaddedRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as GetUnaddedRequest;
+
+    try {
+      // Verify receipt belongs to user
+      await receiptService.getReceiptById(params.receiptId, userProfile.user.user_id, req.log);
+
+      const items = await receiptService.getUnaddedItems(params.receiptId, req.log);
+      sendSuccess(res, { items, total: items.length });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error fetching unadded receipt items',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/confirm:
+ *   post:
+ *     tags: [Receipts]
+ *     summary: Confirm items for inventory
+ *     description: Confirm selected receipt items to add to user's inventory.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - items
+ *             properties:
+ *               items:
+ *                 type: array
+ *                 items:
+ *                   type: object
+ *                   required:
+ *                     - receipt_item_id
+ *                     - include
+ *                   properties:
+ *                     receipt_item_id:
+ *                       type: integer
+ *                     item_name:
+ *                       type: string
+ *                       maxLength: 255
+ *                     quantity:
+ *                       type: number
+ *                       minimum: 0
+ *                     location:
+ *                       type: string
+ *                       enum: [fridge, freezer, pantry, room_temp]
+ *                     expiry_date:
+ *                       type: string
+ *                       format: date
+ *                     include:
+ *                       type: boolean
+ *     responses:
+ *       200:
+ *         description: Items added to inventory
+ *       400:
+ *         description: Validation error
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.post(
+  '/:receiptId/confirm',
+  validateRequest(confirmItemsSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ConfirmItemsRequest = z.infer<typeof confirmItemsSchema>;
+    const { params, body } = req as unknown as ConfirmItemsRequest;
+
+    try {
+      req.log.info(
+        {
+          userId: userProfile.user.user_id,
+          receiptId: params.receiptId,
+          itemCount: body.items.length,
+        },
+        'Confirming receipt items for inventory',
+      );
+
+      const addedItems = await expiryService.addItemsFromReceipt(
+        userProfile.user.user_id,
+        params.receiptId,
+        body.items,
+        req.log,
+      );
+
+      sendSuccess(res, { added_items: addedItems, count: addedItems.length });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error confirming receipt items',
+      );
+      next(error);
+    }
+  },
+);
+
+// ============================================================================
+// PROCESSING LOGS ENDPOINT
+// ============================================================================
+
+/**
+ * @openapi
+ * /receipts/{receiptId}/logs:
+ *   get:
+ *     tags: [Receipts]
+ *     summary: Get processing logs
+ *     description: Get the processing log history for a receipt.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: receiptId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *     responses:
+ *       200:
+ *         description: Processing logs retrieved
+ *       401:
+ *         description: Unauthorized
+ *       404:
+ *         description: Receipt not found
+ */
+router.get(
+  '/:receiptId/logs',
+  validateRequest(receiptIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetLogsRequest = z.infer<typeof receiptIdParamSchema>;
+    const { params } = req as unknown as GetLogsRequest;
+
+    try {
+      // Verify receipt belongs to user
+      await receiptService.getReceiptById(params.receiptId, userProfile.user.user_id, req.log);
+
+      const logs = await receiptService.getProcessingLogs(params.receiptId, req.log);
+      sendSuccess(res, { logs, total: logs.length });
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, receiptId: params.receiptId },
+        'Error fetching processing logs',
+      );
+      next(error);
+    }
+  },
+);
+
+/* Catches errors from multer (e.g., file size, file filter) */
+router.use(handleMulterError);
+
+export default router;
--- a/src/routes/recipe.routes.ts
+++ b/src/routes/recipe.routes.ts
@@ -3,7 +3,7 @@ import { Router } from 'express';
 import { z } from 'zod';
 import * as db from '../services/db/index.db';
 import { aiService } from '../services/aiService.server';
-import passport from './passport.routes';
+import passport from '../config/passport';
 import { validateRequest } from '../middleware/validation.middleware';
 import { requiredString, numericIdParam, optionalNumeric } from '../utils/zodUtils';
 import { publicReadLimiter, suggestionLimiter, userUpdateLimiter } from '../config/rateLimiters';
--- a/src/routes/upc.routes.test.ts
+++ b/src/routes/upc.routes.test.ts
@@ -0,0 +1,525 @@
+// src/routes/upc.routes.test.ts
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import supertest from 'supertest';
+import type { Request, Response, NextFunction } from 'express';
+import { createMockUserProfile } from '../tests/utils/mockFactories';
+import { createTestApp } from '../tests/utils/createTestApp';
+import { NotFoundError } from '../services/db/errors.db';
+import type { UpcScanSource } from '../types/upc';
+
+// Mock the upcService module
+vi.mock('../services/upcService.server', () => ({
+  scanUpc: vi.fn(),
+  lookupUpc: vi.fn(),
+  getScanHistory: vi.fn(),
+  getScanById: vi.fn(),
+  getScanStats: vi.fn(),
+  linkUpcToProduct: vi.fn(),
+}));
+
+// Mock the logger to keep test output clean
+vi.mock('../services/logger.server', async () => ({
+  logger: (await import('../tests/utils/mockLogger')).mockLogger,
+}));
+
+// Import the router and mocked service AFTER all mocks are defined.
+import upcRouter from './upc.routes';
+import * as upcService from '../services/upcService.server';
+
+const mockUser = createMockUserProfile({
+  user: { user_id: 'user-123', email: 'test@test.com' },
+});
+
+const _mockAdminUser = createMockUserProfile({
+  user: { user_id: 'admin-123', email: 'admin@test.com' },
+  role: 'admin',
+});
+
+// Standardized mock for passport
+vi.mock('../config/passport', () => ({
+  default: {
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      req.user = mockUser;
+      next();
+    }),
+    initialize: () => (req: Request, res: Response, next: NextFunction) => next(),
+  },
+  isAdmin: (req: Request, res: Response, next: NextFunction) => {
+    const user = req.user as typeof _mockAdminUser;
+    if (user?.role === 'admin') {
+      next();
+    } else {
+      res.status(403).json({ success: false, error: { message: 'Forbidden' } });
+    }
+  },
+}));
+
+// Define a reusable matcher for the logger object.
+const expectLogger = expect.objectContaining({
+  info: expect.any(Function),
+  error: expect.any(Function),
+});
+
+describe('UPC Routes (/api/upc)', () => {
+  const mockUserProfile = createMockUserProfile({
+    user: { user_id: 'user-123', email: 'test@test.com' },
+  });
+
+  const mockAdminProfile = createMockUserProfile({
+    user: { user_id: 'admin-123', email: 'admin@test.com' },
+    role: 'admin',
+  });
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    // Provide default mock implementations
+    vi.mocked(upcService.getScanHistory).mockResolvedValue({ scans: [], total: 0 });
+    vi.mocked(upcService.getScanStats).mockResolvedValue({
+      total_scans: 0,
+      successful_lookups: 0,
+      unique_products: 0,
+      scans_today: 0,
+      scans_this_week: 0,
+    });
+  });
+
+  const app = createTestApp({
+    router: upcRouter,
+    basePath: '/api/upc',
+    authenticatedUser: mockUserProfile,
+  });
+
+  const adminApp = createTestApp({
+    router: upcRouter,
+    basePath: '/api/upc',
+    authenticatedUser: mockAdminProfile,
+  });
+
+  describe('POST /scan', () => {
+    it('should scan a manually entered UPC code successfully', async () => {
+      const mockScanResult = {
+        scan_id: 1,
+        upc_code: '012345678905',
+        product: {
+          product_id: 1,
+          name: 'Test Product',
+          brand: 'Test Brand',
+          category: 'Snacks',
+          description: null,
+          size: '500g',
+          upc_code: '012345678905',
+          image_url: null,
+          master_item_id: null,
+        },
+        external_lookup: null,
+        confidence: null,
+        lookup_successful: true,
+        is_new_product: false,
+        scanned_at: new Date().toISOString(),
+      };
+
+      vi.mocked(upcService.scanUpc).mockResolvedValue(mockScanResult);
+
+      const response = await supertest(app).post('/api/upc/scan').send({
+        upc_code: '012345678905',
+        scan_source: 'manual_entry',
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.scan_id).toBe(1);
+      expect(response.body.data.upc_code).toBe('012345678905');
+      expect(response.body.data.lookup_successful).toBe(true);
+      expect(upcService.scanUpc).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        { upc_code: '012345678905', scan_source: 'manual_entry' },
+        expectLogger,
+      );
+    });
+
+    it('should scan from base64 image', async () => {
+      const mockScanResult = {
+        scan_id: 2,
+        upc_code: '987654321098',
+        product: null,
+        external_lookup: {
+          name: 'External Product',
+          brand: 'External Brand',
+          category: null,
+          description: null,
+          image_url: null,
+          source: 'openfoodfacts' as const,
+        },
+        confidence: 0.95,
+        lookup_successful: true,
+        is_new_product: true,
+        scanned_at: new Date().toISOString(),
+      };
+
+      vi.mocked(upcService.scanUpc).mockResolvedValue(mockScanResult);
+
+      const response = await supertest(app).post('/api/upc/scan').send({
+        image_base64: 'SGVsbG8gV29ybGQ=',
+        scan_source: 'image_upload',
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.confidence).toBe(0.95);
+      expect(response.body.data.is_new_product).toBe(true);
+    });
+
+    it('should return 400 when neither upc_code nor image_base64 is provided', async () => {
+      const response = await supertest(app).post('/api/upc/scan').send({
+        scan_source: 'manual_entry',
+      });
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details).toBeDefined();
+    });
+
+    it('should return 400 for invalid scan_source', async () => {
+      const response = await supertest(app).post('/api/upc/scan').send({
+        upc_code: '012345678905',
+        scan_source: 'invalid_source',
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if the scan service fails', async () => {
+      vi.mocked(upcService.scanUpc).mockRejectedValue(new Error('Scan service error'));
+
+      const response = await supertest(app).post('/api/upc/scan').send({
+        upc_code: '012345678905',
+        scan_source: 'manual_entry',
+      });
+
+      expect(response.status).toBe(500);
+      expect(response.body.error.message).toBe('Scan service error');
+    });
+  });
+
+  describe('GET /lookup', () => {
+    it('should look up a UPC code successfully', async () => {
+      const mockLookupResult = {
+        upc_code: '012345678905',
+        product: {
+          product_id: 1,
+          name: 'Test Product',
+          brand: 'Test Brand',
+          category: 'Snacks',
+          description: null,
+          size: '500g',
+          upc_code: '012345678905',
+          image_url: null,
+          master_item_id: null,
+        },
+        external_lookup: null,
+        found: true,
+        from_cache: false,
+      };
+
+      vi.mocked(upcService.lookupUpc).mockResolvedValue(mockLookupResult);
+
+      const response = await supertest(app).get('/api/upc/lookup?upc_code=012345678905');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.upc_code).toBe('012345678905');
+      expect(response.body.data.found).toBe(true);
+    });
+
+    it('should support include_external and force_refresh parameters', async () => {
+      const mockLookupResult = {
+        upc_code: '012345678905',
+        product: null,
+        external_lookup: {
+          name: 'External Product',
+          brand: 'External Brand',
+          category: null,
+          description: null,
+          image_url: null,
+          source: 'openfoodfacts' as const,
+        },
+        found: true,
+        from_cache: false,
+      };
+
+      vi.mocked(upcService.lookupUpc).mockResolvedValue(mockLookupResult);
+
+      const response = await supertest(app).get(
+        '/api/upc/lookup?upc_code=012345678905&include_external=true&force_refresh=true',
+      );
+
+      expect(response.status).toBe(200);
+      expect(upcService.lookupUpc).toHaveBeenCalledWith(
+        expect.objectContaining({
+          upc_code: '012345678905',
+          force_refresh: true,
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should return 400 for invalid UPC code format', async () => {
+      const response = await supertest(app).get('/api/upc/lookup?upc_code=123');
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/8-14 digits/);
+    });
+
+    it('should return 400 when upc_code is missing', async () => {
+      const response = await supertest(app).get('/api/upc/lookup');
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if the lookup service fails', async () => {
+      vi.mocked(upcService.lookupUpc).mockRejectedValue(new Error('Lookup error'));
+
+      const response = await supertest(app).get('/api/upc/lookup?upc_code=012345678905');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /history', () => {
+    it('should return scan history with pagination', async () => {
+      const mockHistory = {
+        scans: [
+          {
+            scan_id: 1,
+            user_id: 'user-123',
+            upc_code: '012345678905',
+            product_id: 1,
+            scan_source: 'manual_entry' as UpcScanSource,
+            scan_confidence: null,
+            raw_image_path: null,
+            lookup_successful: true,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(upcService.getScanHistory).mockResolvedValue(mockHistory);
+
+      const response = await supertest(app).get('/api/upc/history?limit=10&offset=0');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.scans).toHaveLength(1);
+      expect(response.body.data.total).toBe(1);
+      expect(upcService.getScanHistory).toHaveBeenCalledWith(
+        expect.objectContaining({
+          user_id: mockUserProfile.user.user_id,
+          limit: 10,
+          offset: 0,
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should support filtering by lookup_successful', async () => {
+      vi.mocked(upcService.getScanHistory).mockResolvedValue({ scans: [], total: 0 });
+
+      const response = await supertest(app).get('/api/upc/history?lookup_successful=true');
+
+      expect(response.status).toBe(200);
+      expect(upcService.getScanHistory).toHaveBeenCalledWith(
+        expect.objectContaining({
+          lookup_successful: true,
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should support filtering by scan_source', async () => {
+      vi.mocked(upcService.getScanHistory).mockResolvedValue({ scans: [], total: 0 });
+
+      const response = await supertest(app).get('/api/upc/history?scan_source=image_upload');
+
+      expect(response.status).toBe(200);
+      expect(upcService.getScanHistory).toHaveBeenCalledWith(
+        expect.objectContaining({
+          scan_source: 'image_upload',
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should support filtering by date range', async () => {
+      vi.mocked(upcService.getScanHistory).mockResolvedValue({ scans: [], total: 0 });
+
+      const response = await supertest(app).get(
+        '/api/upc/history?from_date=2024-01-01&to_date=2024-01-31',
+      );
+
+      expect(response.status).toBe(200);
+      expect(upcService.getScanHistory).toHaveBeenCalledWith(
+        expect.objectContaining({
+          from_date: '2024-01-01',
+          to_date: '2024-01-31',
+        }),
+        expectLogger,
+      );
+    });
+
+    it('should return 400 for invalid date format', async () => {
+      const response = await supertest(app).get('/api/upc/history?from_date=01-01-2024');
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 500 if the history service fails', async () => {
+      vi.mocked(upcService.getScanHistory).mockRejectedValue(new Error('History error'));
+
+      const response = await supertest(app).get('/api/upc/history');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('GET /history/:scanId', () => {
+    it('should return a specific scan by ID', async () => {
+      const mockScan = {
+        scan_id: 1,
+        user_id: 'user-123',
+        upc_code: '012345678905',
+        product_id: 1,
+        scan_source: 'manual_entry' as UpcScanSource,
+        scan_confidence: null,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(upcService.getScanById).mockResolvedValue(mockScan);
+
+      const response = await supertest(app).get('/api/upc/history/1');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.scan_id).toBe(1);
+      expect(upcService.getScanById).toHaveBeenCalledWith(
+        1,
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 404 when scan not found', async () => {
+      vi.mocked(upcService.getScanById).mockRejectedValue(new NotFoundError('Scan not found'));
+
+      const response = await supertest(app).get('/api/upc/history/999');
+
+      expect(response.status).toBe(404);
+      expect(response.body.error.message).toBe('Scan not found');
+    });
+
+    it('should return 400 for invalid scan ID', async () => {
+      const response = await supertest(app).get('/api/upc/history/abc');
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/Invalid ID|number/i);
+    });
+  });
+
+  describe('GET /stats', () => {
+    it('should return scan statistics', async () => {
+      const mockStats = {
+        total_scans: 100,
+        successful_lookups: 80,
+        unique_products: 50,
+        scans_today: 5,
+        scans_this_week: 25,
+      };
+
+      vi.mocked(upcService.getScanStats).mockResolvedValue(mockStats);
+
+      const response = await supertest(app).get('/api/upc/stats');
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.total_scans).toBe(100);
+      expect(response.body.data.successful_lookups).toBe(80);
+      expect(upcService.getScanStats).toHaveBeenCalledWith(
+        mockUserProfile.user.user_id,
+        expectLogger,
+      );
+    });
+
+    it('should return 500 if the stats service fails', async () => {
+      vi.mocked(upcService.getScanStats).mockRejectedValue(new Error('Stats error'));
+
+      const response = await supertest(app).get('/api/upc/stats');
+
+      expect(response.status).toBe(500);
+    });
+  });
+
+  describe('POST /link', () => {
+    it('should link UPC to product (admin only)', async () => {
+      vi.mocked(upcService.linkUpcToProduct).mockResolvedValue(undefined);
+
+      const response = await supertest(adminApp).post('/api/upc/link').send({
+        upc_code: '012345678905',
+        product_id: 1,
+      });
+
+      expect(response.status).toBe(204);
+      expect(upcService.linkUpcToProduct).toHaveBeenCalledWith(1, '012345678905', expectLogger);
+    });
+
+    it('should return 403 for non-admin users', async () => {
+      const response = await supertest(app).post('/api/upc/link').send({
+        upc_code: '012345678905',
+        product_id: 1,
+      });
+
+      expect(response.status).toBe(403);
+      expect(upcService.linkUpcToProduct).not.toHaveBeenCalled();
+    });
+
+    it('should return 400 for invalid UPC code format', async () => {
+      const response = await supertest(adminApp).post('/api/upc/link').send({
+        upc_code: '123',
+        product_id: 1,
+      });
+
+      expect(response.status).toBe(400);
+      expect(response.body.error.details[0].message).toMatch(/8-14 digits/);
+    });
+
+    it('should return 400 for invalid product_id', async () => {
+      const response = await supertest(adminApp).post('/api/upc/link').send({
+        upc_code: '012345678905',
+        product_id: -1,
+      });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should return 404 when product not found', async () => {
+      vi.mocked(upcService.linkUpcToProduct).mockRejectedValue(
+        new NotFoundError('Product not found'),
+      );
+
+      const response = await supertest(adminApp).post('/api/upc/link').send({
+        upc_code: '012345678905',
+        product_id: 999,
+      });
+
+      expect(response.status).toBe(404);
+      expect(response.body.error.message).toBe('Product not found');
+    });
+
+    it('should return 500 if the link service fails', async () => {
+      vi.mocked(upcService.linkUpcToProduct).mockRejectedValue(new Error('Link error'));
+
+      const response = await supertest(adminApp).post('/api/upc/link').send({
+        upc_code: '012345678905',
+        product_id: 1,
+      });
+
+      expect(response.status).toBe(500);
+    });
+  });
+});
--- a/src/routes/upc.routes.ts
+++ b/src/routes/upc.routes.ts
@@ -0,0 +1,493 @@
+// src/routes/upc.routes.ts
+/**
+ * @file UPC Scanning API Routes
+ * Provides endpoints for UPC barcode scanning, lookup, and scan history.
+ */
+import express, { Request, Response, NextFunction } from 'express';
+import { z } from 'zod';
+import passport, { isAdmin } from '../config/passport';
+import type { UserProfile } from '../types';
+import { validateRequest } from '../middleware/validation.middleware';
+import { numericIdParam, optionalNumeric } from '../utils/zodUtils';
+import { sendSuccess, sendNoContent } from '../utils/apiResponse';
+import * as upcService from '../services/upcService.server';
+
+const router = express.Router();
+
+// --- Zod Schemas for UPC Routes ---
+
+/**
+ * UPC code validation (8-14 digits)
+ */
+const upcCodeSchema = z.string().regex(/^[0-9]{8,14}$/, 'UPC code must be 8-14 digits.');
+
+/**
+ * Scan source validation
+ */
+const scanSourceSchema = z.enum(['image_upload', 'manual_entry', 'phone_app', 'camera_scan']);
+
+/**
+ * Schema for UPC scan request
+ */
+const scanUpcSchema = z.object({
+  body: z
+    .object({
+      upc_code: z.string().optional(),
+      image_base64: z.string().optional(),
+      scan_source: scanSourceSchema,
+    })
+    .refine((data) => data.upc_code || data.image_base64, {
+      message: 'Either upc_code or image_base64 must be provided.',
+    }),
+});
+
+/**
+ * Schema for UPC lookup request (without recording scan)
+ */
+const lookupUpcSchema = z.object({
+  query: z.object({
+    upc_code: upcCodeSchema,
+    include_external: z
+      .string()
+      .optional()
+      .transform((val) => val === 'true'),
+    force_refresh: z
+      .string()
+      .optional()
+      .transform((val) => val === 'true'),
+  }),
+});
+
+/**
+ * Schema for linking UPC to product (admin)
+ */
+const linkUpcSchema = z.object({
+  body: z.object({
+    upc_code: upcCodeSchema,
+    product_id: z.number().int().positive('Product ID must be a positive integer.'),
+  }),
+});
+
+/**
+ * Schema for scan ID parameter
+ */
+const scanIdParamSchema = numericIdParam(
+  'scanId',
+  "Invalid ID for parameter 'scanId'. Must be a number.",
+);
+
+/**
+ * Schema for scan history query
+ */
+const scanHistoryQuerySchema = z.object({
+  query: z.object({
+    limit: optionalNumeric({ default: 50, min: 1, max: 100, integer: true }),
+    offset: optionalNumeric({ default: 0, min: 0, integer: true }),
+    lookup_successful: z
+      .string()
+      .optional()
+      .transform((val) => (val === 'true' ? true : val === 'false' ? false : undefined)),
+    scan_source: scanSourceSchema.optional(),
+    from_date: z.string().date().optional(),
+    to_date: z.string().date().optional(),
+  }),
+});
+
+// Middleware to ensure user is authenticated for all UPC routes
+router.use(passport.authenticate('jwt', { session: false }));
+
+/**
+ * @openapi
+ * /upc/scan:
+ *   post:
+ *     tags: [UPC Scanning]
+ *     summary: Scan a UPC barcode
+ *     description: >
+ *       Scans a UPC barcode either from a manually entered code or from an image.
+ *       Records the scan in history and returns product information if found.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - scan_source
+ *             properties:
+ *               upc_code:
+ *                 type: string
+ *                 pattern: '^[0-9]{8,14}$'
+ *                 description: UPC code (8-14 digits). Required if image_base64 is not provided.
+ *               image_base64:
+ *                 type: string
+ *                 description: Base64-encoded image containing a barcode. Required if upc_code is not provided.
+ *               scan_source:
+ *                 type: string
+ *                 enum: [image_upload, manual_entry, phone_app, camera_scan]
+ *                 description: How the scan was initiated.
+ *     responses:
+ *       200:
+ *         description: Scan completed successfully
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       400:
+ *         description: Validation error - invalid UPC code or missing data
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ */
+router.post(
+  '/scan',
+  validateRequest(scanUpcSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ScanUpcRequest = z.infer<typeof scanUpcSchema>;
+    const { body } = req as unknown as ScanUpcRequest;
+
+    try {
+      req.log.info(
+        { userId: userProfile.user.user_id, scanSource: body.scan_source },
+        'UPC scan request received',
+      );
+
+      const result = await upcService.scanUpc(userProfile.user.user_id, body, req.log);
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, scanSource: body.scan_source },
+        'Error processing UPC scan',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /upc/lookup:
+ *   get:
+ *     tags: [UPC Scanning]
+ *     summary: Look up a UPC code
+ *     description: >
+ *       Looks up product information for a UPC code without recording in scan history.
+ *       Useful for verification or quick lookups.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: upc_code
+ *         required: true
+ *         schema:
+ *           type: string
+ *           pattern: '^[0-9]{8,14}$'
+ *         description: UPC code to look up (8-14 digits)
+ *       - in: query
+ *         name: include_external
+ *         schema:
+ *           type: boolean
+ *           default: true
+ *         description: Whether to check external APIs if not found locally
+ *       - in: query
+ *         name: force_refresh
+ *         schema:
+ *           type: boolean
+ *           default: false
+ *         description: Skip cache and perform fresh external lookup
+ *     responses:
+ *       200:
+ *         description: Lookup completed
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       400:
+ *         description: Invalid UPC code format
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ */
+router.get(
+  '/lookup',
+  validateRequest(lookupUpcSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    type LookupUpcRequest = z.infer<typeof lookupUpcSchema>;
+    const { query } = req as unknown as LookupUpcRequest;
+
+    try {
+      req.log.debug({ upcCode: query.upc_code }, 'UPC lookup request received');
+
+      const result = await upcService.lookupUpc(
+        {
+          upc_code: query.upc_code,
+          force_refresh: query.force_refresh,
+        },
+        req.log,
+      );
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error({ error, upcCode: query.upc_code }, 'Error looking up UPC');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /upc/history:
+ *   get:
+ *     tags: [UPC Scanning]
+ *     summary: Get scan history
+ *     description: Retrieve the authenticated user's UPC scan history with optional filtering.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: query
+ *         name: limit
+ *         schema:
+ *           type: integer
+ *           minimum: 1
+ *           maximum: 100
+ *           default: 50
+ *         description: Maximum number of results
+ *       - in: query
+ *         name: offset
+ *         schema:
+ *           type: integer
+ *           minimum: 0
+ *           default: 0
+ *         description: Number of results to skip
+ *       - in: query
+ *         name: lookup_successful
+ *         schema:
+ *           type: boolean
+ *         description: Filter by lookup success status
+ *       - in: query
+ *         name: scan_source
+ *         schema:
+ *           type: string
+ *           enum: [image_upload, manual_entry, phone_app, camera_scan]
+ *         description: Filter by scan source
+ *       - in: query
+ *         name: from_date
+ *         schema:
+ *           type: string
+ *           format: date
+ *         description: Filter scans from this date (YYYY-MM-DD)
+ *       - in: query
+ *         name: to_date
+ *         schema:
+ *           type: string
+ *           format: date
+ *         description: Filter scans until this date (YYYY-MM-DD)
+ *     responses:
+ *       200:
+ *         description: Scan history retrieved
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ */
+router.get(
+  '/history',
+  validateRequest(scanHistoryQuerySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type ScanHistoryRequest = z.infer<typeof scanHistoryQuerySchema>;
+    const { query } = req as unknown as ScanHistoryRequest;
+
+    try {
+      const result = await upcService.getScanHistory(
+        {
+          user_id: userProfile.user.user_id,
+          limit: query.limit,
+          offset: query.offset,
+          lookup_successful: query.lookup_successful,
+          scan_source: query.scan_source,
+          from_date: query.from_date,
+          to_date: query.to_date,
+        },
+        req.log,
+      );
+      sendSuccess(res, result);
+    } catch (error) {
+      req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching scan history');
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /upc/history/{scanId}:
+ *   get:
+ *     tags: [UPC Scanning]
+ *     summary: Get scan by ID
+ *     description: Retrieve a specific scan record by its ID.
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: scanId
+ *         required: true
+ *         schema:
+ *           type: integer
+ *         description: Scan ID
+ *     responses:
+ *       200:
+ *         description: Scan record retrieved
+ *         content:
+ *           application/json:
+ *             schema:
+ *               $ref: '#/components/schemas/SuccessResponse'
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ *       404:
+ *         description: Scan record not found
+ */
+router.get(
+  '/history/:scanId',
+  validateRequest(scanIdParamSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type GetScanRequest = z.infer<typeof scanIdParamSchema>;
+    const { params } = req as unknown as GetScanRequest;
+
+    try {
+      const scan = await upcService.getScanById(params.scanId, userProfile.user.user_id, req.log);
+      sendSuccess(res, scan);
+    } catch (error) {
+      req.log.error(
+        { error, userId: userProfile.user.user_id, scanId: params.scanId },
+        'Error fetching scan by ID',
+      );
+      next(error);
+    }
+  },
+);
+
+/**
+ * @openapi
+ * /upc/stats:
+ *   get:
+ *     tags: [UPC Scanning]
+ *     summary: Get scan statistics
+ *     description: Get scanning statistics for the authenticated user.
+ *     security:
+ *       - bearerAuth: []
+ *     responses:
+ *       200:
+ *         description: Scan statistics retrieved
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 success:
+ *                   type: boolean
+ *                 data:
+ *                   type: object
+ *                   properties:
+ *                     total_scans:
+ *                       type: integer
+ *                     successful_lookups:
+ *                       type: integer
+ *                     unique_products:
+ *                       type: integer
+ *                     scans_today:
+ *                       type: integer
+ *                     scans_this_week:
+ *                       type: integer
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ */
+router.get('/stats', async (req: Request, res: Response, next: NextFunction) => {
+  const userProfile = req.user as UserProfile;
+
+  try {
+    const stats = await upcService.getScanStats(userProfile.user.user_id, req.log);
+    sendSuccess(res, stats);
+  } catch (error) {
+    req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching scan statistics');
+    next(error);
+  }
+});
+
+/**
+ * @openapi
+ * /upc/link:
+ *   post:
+ *     tags: [UPC Scanning]
+ *     summary: Link UPC to product (Admin)
+ *     description: >
+ *       Links a UPC code to an existing product in the database.
+ *       This is an admin-only operation.
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - upc_code
+ *               - product_id
+ *             properties:
+ *               upc_code:
+ *                 type: string
+ *                 pattern: '^[0-9]{8,14}$'
+ *                 description: UPC code to link (8-14 digits)
+ *               product_id:
+ *                 type: integer
+ *                 description: Product ID to link the UPC to
+ *     responses:
+ *       204:
+ *         description: UPC linked successfully
+ *       400:
+ *         description: Invalid UPC code or product ID
+ *       401:
+ *         description: Unauthorized - invalid or missing token
+ *       403:
+ *         description: Forbidden - user is not an admin
+ *       404:
+ *         description: Product not found
+ *       409:
+ *         description: UPC code already linked to another product
+ */
+router.post(
+  '/link',
+  isAdmin, // Admin role check - only admins can link UPC codes to products
+  validateRequest(linkUpcSchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    type LinkUpcRequest = z.infer<typeof linkUpcSchema>;
+    const { body } = req as unknown as LinkUpcRequest;
+
+    try {
+      req.log.info(
+        { userId: userProfile.user.user_id, productId: body.product_id, upcCode: body.upc_code },
+        'UPC link request received',
+      );
+
+      await upcService.linkUpcToProduct(body.product_id, body.upc_code, req.log);
+      sendNoContent(res);
+    } catch (error) {
+      req.log.error(
+        {
+          error,
+          userId: userProfile.user.user_id,
+          productId: body.product_id,
+          upcCode: body.upc_code,
+        },
+        'Error linking UPC to product',
+      );
+      next(error);
+    }
+  },
+);
+
+export default router;
--- a/src/routes/user.routes.ts
+++ b/src/routes/user.routes.ts
@@ -1,6 +1,6 @@
 // src/routes/user.routes.ts
 import express, { Request, Response, NextFunction } from 'express';
-import passport from './passport.routes';
+import passport from '../config/passport';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { z } from 'zod';
 // Removed: import { logger } from '../services/logger.server';
--- a/src/services/aiService.server.ts
+++ b/src/services/aiService.server.ts
@@ -819,7 +819,8 @@ export class AIService {
    logger.info({ baseUrl }, '[aiService] Enqueuing job with valid baseUrl.');
    // --- END DEBUGGING ---

-    // 3. Add job to the queue
+    // 3. Add job to the queue with context propagation (ADR-051)
+    const bindings = logger.bindings?.() || {};
    const job = await flyerQueue.add('process-flyer', {
      filePath: file.path,
      originalFileName: file.originalname,
@@ -828,6 +829,11 @@ export class AIService {
      submitterIp: submitterIp,
      userProfileAddress: userProfileAddress,
      baseUrl: baseUrl,
+      meta: {
+        requestId: bindings.request_id as string | undefined,
+        userId: userProfile?.user.user_id,
+        origin: 'api',
+      },
    });

    logger.info(`Enqueued flyer for processing. File: ${file.originalname}, Job ID: ${job.id}`);
@@ -1005,5 +1011,5 @@ export class AIService {
 }

 // Export a singleton instance of the service for use throughout the application.
-import { logger } from './logger.server';
-export const aiService = new AIService(logger);
+import { createScopedLogger } from './logger.server';
+export const aiService = new AIService(createScopedLogger('ai-service'));
--- a/src/services/apiClient.test.ts
+++ b/src/services/apiClient.test.ts
@@ -197,6 +197,23 @@ describe('API Client', () => {
      );
    });

+    it('should handle x-request-id header on failure (Sentry optional)', async () => {
+      const requestId = 'req-123';
+
+      vi.mocked(global.fetch).mockResolvedValueOnce({
+        ok: false,
+        status: 500,
+        headers: new Headers({ 'x-request-id': requestId }),
+        clone: () => ({ text: () => Promise.resolve('Error') }),
+      } as Response);
+
+      // This should not throw even if Sentry is not installed
+      await apiClient.apiFetch('/error');
+
+      // The request should complete without error
+      expect(true).toBe(true);
+    });
+
    it('should handle 401 on initial call, refresh token, and then poll until completed', async () => {
      localStorage.setItem('authToken', 'expired-token');
      // Mock the global fetch to return a sequence of responses:
@@ -301,7 +318,10 @@ describe('API Client', () => {
    });

    it('addWatchedItem should send a POST request with the correct body', async () => {
-      const watchedItemData = createMockWatchedItemPayload({ itemName: 'Apples', category: 'Produce' });
+      const watchedItemData = createMockWatchedItemPayload({
+        itemName: 'Apples',
+        category: 'Produce',
+      });
      await apiClient.addWatchedItem(watchedItemData.itemName, watchedItemData.category);

      expect(capturedUrl?.pathname).toBe('/api/users/watched-items');
@@ -532,7 +552,10 @@ describe('API Client', () => {

    it('addRecipeComment should send a POST request with content and optional parentId', async () => {
      const recipeId = 456;
-      const commentData = createMockRecipeCommentPayload({ content: 'This is a reply', parentCommentId: 789 });
+      const commentData = createMockRecipeCommentPayload({
+        content: 'This is a reply',
+        parentCommentId: 789,
+      });
      await apiClient.addRecipeComment(recipeId, commentData.content, commentData.parentCommentId);
      expect(capturedUrl?.pathname).toBe(`/api/recipes/${recipeId}/comments`);
      expect(capturedBody).toEqual(commentData);
@@ -646,7 +669,10 @@ describe('API Client', () => {
    });

    it('updateUserAddress should send a PUT request with address data', async () => {
-      const addressData = createMockAddressPayload({ address_line_1: '123 Main St', city: 'Anytown' });
+      const addressData = createMockAddressPayload({
+        address_line_1: '123 Main St',
+        city: 'Anytown',
+      });
      await apiClient.updateUserAddress(addressData);
      expect(capturedUrl?.pathname).toBe('/api/users/profile/address');
      expect(capturedBody).toEqual(addressData);
@@ -744,6 +770,16 @@ describe('API Client', () => {
      expect(capturedUrl?.pathname).toBe('/api/health/redis');
    });

+    it('getQueueHealth should call the correct health check endpoint', async () => {
+      server.use(
+        http.get('http://localhost/api/health/queues', () => {
+          return HttpResponse.json({});
+        }),
+      );
+      await apiClient.getQueueHealth();
+      expect(capturedUrl?.pathname).toBe('/api/health/queues');
+    });
+
    it('checkPm2Status should call the correct system endpoint', async () => {
      server.use(
        http.get('http://localhost/api/system/pm2-status', () => {
@@ -939,7 +975,11 @@ describe('API Client', () => {
    });

    it('logSearchQuery should send a POST request with query data', async () => {
-      const queryData = createMockSearchQueryPayload({ query_text: 'apples', result_count: 10, was_successful: true });
+      const queryData = createMockSearchQueryPayload({
+        query_text: 'apples',
+        result_count: 10,
+        was_successful: true,
+      });
      await apiClient.logSearchQuery(queryData as any);
      expect(capturedUrl?.pathname).toBe('/api/search/log');
      expect(capturedBody).toEqual(queryData);
--- a/src/services/apiClient.ts
+++ b/src/services/apiClient.ts
@@ -3,6 +3,16 @@ import { Profile, ShoppingListItem, SearchQuery, Budget, Address } from '../type
 import { logger } from './logger.client';
 import { eventBus } from './eventBus';

+// Sentry integration is optional - only used if @sentry/browser is installed
+let Sentry: { setTag?: (key: string, value: string) => void } | null = null;
+try {
+  // Dynamic import would be cleaner but this keeps the code synchronous
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  Sentry = require('@sentry/browser');
+} catch {
+  // Sentry not installed, skip error tracking integration
+}
+
 // This constant should point to your backend API.
 // It's often a good practice to store this in an environment variable.
 // Using a relative path '/api' is the most robust method for production.
@@ -148,9 +158,14 @@ export const apiFetch = async (

  // --- DEBUG LOGGING for failed requests ---
  if (!response.ok) {
+    const requestId = response.headers.get('x-request-id');
+    if (requestId && Sentry?.setTag) {
+      Sentry.setTag('api_request_id', requestId);
+    }
+
    const responseText = await response.clone().text();
    logger.error(
-      { url: fullUrl, status: response.status, body: responseText },
+      { url: fullUrl, status: response.status, body: responseText, requestId },
      'apiFetch: Request failed',
    );
  }
@@ -272,6 +287,12 @@ export const checkDbPoolHealth = (): Promise<Response> => publicGet('/health/db-
 */
 export const checkRedisHealth = (): Promise<Response> => publicGet('/health/redis');

+/**
+ * Fetches the health status of the background job queues.
+ * @returns A promise that resolves to the queue status object.
+ */
+export const getQueueHealth = (): Promise<Response> => publicGet('/health/queues');
+
 /**
 * Checks the status of the application process managed by PM2.
 * This is intended for development and diagnostic purposes.
--- a/src/services/barcodeService.server.test.ts
+++ b/src/services/barcodeService.server.test.ts
@@ -0,0 +1,404 @@
+// src/services/barcodeService.server.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { Logger } from 'pino';
+import type { Job } from 'bullmq';
+import type { BarcodeDetectionJobData } from '../types/job-data';
+import { createMockLogger } from '../tests/utils/mockLogger';
+
+// Mock dependencies
+vi.mock('zxing-wasm/reader', () => ({
+  readBarcodesFromImageData: vi.fn(),
+}));
+
+vi.mock('sharp', () => {
+  const mockSharp = vi.fn(() => ({
+    metadata: vi.fn().mockResolvedValue({ width: 100, height: 100 }),
+    ensureAlpha: vi.fn().mockReturnThis(),
+    raw: vi.fn().mockReturnThis(),
+    toBuffer: vi.fn().mockResolvedValue({
+      data: new Uint8Array(100 * 100 * 4),
+      info: { width: 100, height: 100 },
+    }),
+    grayscale: vi.fn().mockReturnThis(),
+    normalize: vi.fn().mockReturnThis(),
+    sharpen: vi.fn().mockReturnThis(),
+    toFile: vi.fn().mockResolvedValue(undefined),
+  }));
+  return { default: mockSharp };
+});
+
+vi.mock('node:fs/promises', () => ({
+  default: {
+    readFile: vi.fn().mockResolvedValue(Buffer.from('mock image data')),
+  },
+}));
+
+vi.mock('./db/index.db', () => ({
+  upcRepo: {
+    updateScanWithDetectedCode: vi.fn().mockResolvedValue(undefined),
+  },
+}));
+
+// Import after mocks are set up
+import {
+  detectBarcode,
+  isValidUpcFormat,
+  calculateUpcCheckDigit,
+  validateUpcCheckDigit,
+  processBarcodeDetectionJob,
+  detectMultipleBarcodes,
+  enhanceImageForDetection,
+} from './barcodeService.server';
+
+describe('barcodeService.server', () => {
+  let mockLogger: Logger;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockLogger = createMockLogger();
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe('detectBarcode', () => {
+    it('should detect a valid UPC-A barcode from image', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '012345678905', format: 'UPC-A' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.upc_code).toBe('012345678905');
+      expect(result.format).toBe('UPC-A');
+      expect(result.confidence).toBe(0.95);
+      expect(result.error).toBeNull();
+    });
+
+    it('should detect a valid UPC-E barcode from image', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '01234567', format: 'UPC-E' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.upc_code).toBe('01234567');
+      expect(result.format).toBe('UPC-E');
+    });
+
+    it('should detect a valid EAN-13 barcode from image', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '5901234123457', format: 'EAN-13' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.upc_code).toBe('5901234123457');
+      expect(result.format).toBe('EAN-13');
+    });
+
+    it('should detect a valid EAN-8 barcode from image', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '96385074', format: 'EAN-8' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.upc_code).toBe('96385074');
+      expect(result.format).toBe('EAN-8');
+    });
+
+    it('should return detected: false when no barcode found', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([]);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(result.upc_code).toBeNull();
+      expect(result.confidence).toBeNull();
+      expect(result.format).toBeNull();
+      expect(result.error).toBeNull();
+    });
+
+    it('should return error when image dimensions cannot be determined', async () => {
+      const sharp = (await import('sharp')).default;
+      vi.mocked(sharp).mockReturnValueOnce({
+        metadata: vi.fn().mockResolvedValue({}),
+        ensureAlpha: vi.fn().mockReturnThis(),
+        raw: vi.fn().mockReturnThis(),
+        toBuffer: vi.fn(),
+      } as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(result.error).toBe('Could not determine image dimensions');
+    });
+
+    it('should handle errors during detection gracefully', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockRejectedValueOnce(new Error('Detection failed'));
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(result.error).toBe('Detection failed');
+    });
+
+    it('should map unknown barcode formats to "unknown"', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '12345678', format: 'SomeFutureFormat' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.format).toBe('unknown');
+    });
+
+    it('should calculate lower confidence when text is empty', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '', format: 'UPC-A' },
+      ] as any);
+
+      const result = await detectBarcode('/path/to/image.jpg', mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.confidence).toBe(0.5);
+    });
+  });
+
+  describe('isValidUpcFormat', () => {
+    it('should return true for valid 12-digit UPC-A', () => {
+      expect(isValidUpcFormat('012345678905')).toBe(true);
+    });
+
+    it('should return true for valid 8-digit UPC-E', () => {
+      expect(isValidUpcFormat('01234567')).toBe(true);
+    });
+
+    it('should return true for valid 13-digit EAN-13', () => {
+      expect(isValidUpcFormat('5901234123457')).toBe(true);
+    });
+
+    it('should return true for valid 8-digit EAN-8', () => {
+      expect(isValidUpcFormat('96385074')).toBe(true);
+    });
+
+    it('should return true for valid 14-digit GTIN-14', () => {
+      expect(isValidUpcFormat('00012345678905')).toBe(true);
+    });
+
+    it('should return false for code with less than 8 digits', () => {
+      expect(isValidUpcFormat('1234567')).toBe(false);
+    });
+
+    it('should return false for code with more than 14 digits', () => {
+      expect(isValidUpcFormat('123456789012345')).toBe(false);
+    });
+
+    it('should return false for code with non-numeric characters', () => {
+      expect(isValidUpcFormat('01234567890A')).toBe(false);
+    });
+
+    it('should return false for empty string', () => {
+      expect(isValidUpcFormat('')).toBe(false);
+    });
+  });
+
+  describe('calculateUpcCheckDigit', () => {
+    it('should calculate correct check digit for valid 11-digit code', () => {
+      // UPC-A: 01234567890 has check digit 5
+      expect(calculateUpcCheckDigit('01234567890')).toBe(5);
+    });
+
+    it('should return null for code with wrong length', () => {
+      expect(calculateUpcCheckDigit('1234567890')).toBeNull(); // 10 digits
+      expect(calculateUpcCheckDigit('123456789012')).toBeNull(); // 12 digits
+    });
+
+    it('should return null for code with non-numeric characters', () => {
+      expect(calculateUpcCheckDigit('0123456789A')).toBeNull();
+    });
+
+    it('should handle all zeros', () => {
+      // 00000000000 should produce a valid check digit
+      const checkDigit = calculateUpcCheckDigit('00000000000');
+      expect(typeof checkDigit).toBe('number');
+      expect(checkDigit).toBeGreaterThanOrEqual(0);
+      expect(checkDigit).toBeLessThanOrEqual(9);
+    });
+  });
+
+  describe('validateUpcCheckDigit', () => {
+    it('should return true for valid UPC-A with correct check digit', () => {
+      expect(validateUpcCheckDigit('012345678905')).toBe(true);
+    });
+
+    it('should return false for UPC-A with incorrect check digit', () => {
+      expect(validateUpcCheckDigit('012345678901')).toBe(false);
+    });
+
+    it('should return false for code with wrong length', () => {
+      expect(validateUpcCheckDigit('01234567890')).toBe(false); // 11 digits
+      expect(validateUpcCheckDigit('0123456789012')).toBe(false); // 13 digits
+    });
+
+    it('should return false for code with non-numeric characters', () => {
+      expect(validateUpcCheckDigit('01234567890A')).toBe(false);
+    });
+  });
+
+  describe('processBarcodeDetectionJob', () => {
+    it('should process job and update scan record when barcode detected', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      const { upcRepo } = await import('./db/index.db');
+
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '012345678905', format: 'UPC-A' },
+      ] as any);
+
+      const mockJob = {
+        id: 'job-1',
+        data: {
+          scanId: 123,
+          imagePath: '/path/to/barcode.jpg',
+          userId: 'user-1',
+          meta: { requestId: 'req-1' },
+        },
+      } as Job<BarcodeDetectionJobData>;
+
+      const result = await processBarcodeDetectionJob(mockJob, mockLogger);
+
+      expect(result.detected).toBe(true);
+      expect(result.upc_code).toBe('012345678905');
+      expect(upcRepo.updateScanWithDetectedCode).toHaveBeenCalledWith(
+        123,
+        '012345678905',
+        0.95,
+        expect.any(Object),
+      );
+    });
+
+    it('should not update scan record when no barcode detected', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      const { upcRepo } = await import('./db/index.db');
+
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([]);
+
+      const mockJob = {
+        id: 'job-2',
+        data: {
+          scanId: 456,
+          imagePath: '/path/to/no-barcode.jpg',
+          userId: 'user-2',
+        },
+      } as Job<BarcodeDetectionJobData>;
+
+      const result = await processBarcodeDetectionJob(mockJob, mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(upcRepo.updateScanWithDetectedCode).not.toHaveBeenCalled();
+    });
+
+    it('should return error result when job processing fails', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockRejectedValueOnce(new Error('Processing error'));
+
+      const mockJob = {
+        id: 'job-3',
+        data: {
+          scanId: 789,
+          imagePath: '/path/to/error.jpg',
+          userId: 'user-3',
+        },
+      } as Job<BarcodeDetectionJobData>;
+
+      const result = await processBarcodeDetectionJob(mockJob, mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(result.error).toBe('Processing error');
+    });
+  });
+
+  describe('detectMultipleBarcodes', () => {
+    it('should detect multiple barcodes in an image', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([
+        { text: '012345678905', format: 'UPC-A' },
+        { text: '5901234123457', format: 'EAN-13' },
+        { text: '96385074', format: 'EAN-8' },
+      ] as any);
+
+      const results = await detectMultipleBarcodes('/path/to/multi.jpg', mockLogger);
+
+      expect(results).toHaveLength(3);
+      expect(results[0].upc_code).toBe('012345678905');
+      expect(results[0].format).toBe('UPC-A');
+      expect(results[1].upc_code).toBe('5901234123457');
+      expect(results[1].format).toBe('EAN-13');
+      expect(results[2].upc_code).toBe('96385074');
+      expect(results[2].format).toBe('EAN-8');
+    });
+
+    it('should return empty array when no barcodes detected', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockResolvedValueOnce([]);
+
+      const results = await detectMultipleBarcodes('/path/to/no-codes.jpg', mockLogger);
+
+      expect(results).toEqual([]);
+    });
+
+    it('should return empty array on error', async () => {
+      const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+      vi.mocked(readBarcodesFromImageData).mockRejectedValueOnce(
+        new Error('Multi-detection failed'),
+      );
+
+      const results = await detectMultipleBarcodes('/path/to/error.jpg', mockLogger);
+
+      expect(results).toEqual([]);
+    });
+  });
+
+  describe('enhanceImageForDetection', () => {
+    it('should enhance image and return new path', async () => {
+      const result = await enhanceImageForDetection('/path/to/image.jpg', mockLogger);
+
+      expect(result).toBe('/path/to/image-enhanced.jpg');
+    });
+
+    it('should handle different file extensions', async () => {
+      const result = await enhanceImageForDetection('/path/to/image.png', mockLogger);
+
+      expect(result).toBe('/path/to/image-enhanced.png');
+    });
+
+    it('should return original path on enhancement failure', async () => {
+      const sharp = (await import('sharp')).default;
+      vi.mocked(sharp).mockReturnValueOnce({
+        grayscale: vi.fn().mockReturnThis(),
+        normalize: vi.fn().mockReturnThis(),
+        sharpen: vi.fn().mockReturnThis(),
+        toFile: vi.fn().mockRejectedValue(new Error('Enhancement failed')),
+      } as any);
+
+      const result = await enhanceImageForDetection('/path/to/image.jpg', mockLogger);
+
+      expect(result).toBe('/path/to/image.jpg');
+    });
+  });
+});
--- a/src/services/barcodeService.server.ts
+++ b/src/services/barcodeService.server.ts
@@ -0,0 +1,335 @@
+// src/services/barcodeService.server.ts
+/**
+ * @file Barcode Detection Service
+ * Provides barcode/UPC detection from images using zxing-wasm.
+ * Supports UPC-A, UPC-E, EAN-13, EAN-8, CODE-128, CODE-39, and QR codes.
+ */
+import type { Logger } from 'pino';
+import type { Job } from 'bullmq';
+import type { BarcodeDetectionJobData } from '../types/job-data';
+import type { BarcodeDetectionResult } from '../types/upc';
+import { upcRepo } from './db/index.db';
+import sharp from 'sharp';
+import fs from 'node:fs/promises';
+
+/**
+ * Supported barcode formats for detection.
+ */
+export type BarcodeFormat =
+  | 'UPC-A'
+  | 'UPC-E'
+  | 'EAN-13'
+  | 'EAN-8'
+  | 'CODE-128'
+  | 'CODE-39'
+  | 'QR_CODE'
+  | 'unknown';
+
+/**
+ * Maps zxing-wasm format names to our BarcodeFormat type.
+ */
+const formatMap: Record<string, BarcodeFormat> = {
+  'UPC-A': 'UPC-A',
+  'UPC-E': 'UPC-E',
+  'EAN-13': 'EAN-13',
+  'EAN-8': 'EAN-8',
+  Code128: 'CODE-128',
+  Code39: 'CODE-39',
+  QRCode: 'QR_CODE',
+};
+
+/**
+ * Detects barcodes in an image using zxing-wasm.
+ *
+ * @param imagePath Path to the image file
+ * @param logger Pino logger instance
+ * @returns Detection result with UPC code if found
+ */
+export const detectBarcode = async (
+  imagePath: string,
+  logger: Logger,
+): Promise<BarcodeDetectionResult> => {
+  const detectionLogger = logger.child({ imagePath });
+  detectionLogger.info('Starting barcode detection');
+
+  try {
+    // Dynamically import zxing-wasm (ES module)
+    const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+
+    // Read and process the image with sharp
+    const imageBuffer = await fs.readFile(imagePath);
+
+    // Convert to raw pixel data (RGBA)
+    const image = sharp(imageBuffer);
+    const metadata = await image.metadata();
+
+    if (!metadata.width || !metadata.height) {
+      detectionLogger.warn('Could not determine image dimensions');
+      return {
+        detected: false,
+        upc_code: null,
+        confidence: null,
+        format: null,
+        error: 'Could not determine image dimensions',
+      };
+    }
+
+    // Convert to raw RGBA pixels
+    const { data, info } = await image.ensureAlpha().raw().toBuffer({ resolveWithObject: true });
+
+    // Create ImageData-like object for zxing-wasm
+    const imageData = {
+      data: new Uint8ClampedArray(data),
+      width: info.width,
+      height: info.height,
+      colorSpace: 'srgb' as const,
+    };
+
+    detectionLogger.debug(
+      { width: info.width, height: info.height },
+      'Processing image for barcode detection',
+    );
+
+    // Attempt barcode detection
+    const results = await readBarcodesFromImageData(imageData as ImageData, {
+      tryHarder: true,
+      tryRotate: true,
+      tryInvert: true,
+      formats: ['UPC-A', 'UPC-E', 'EAN-13', 'EAN-8', 'Code128', 'Code39'],
+    });
+
+    if (results.length === 0) {
+      detectionLogger.info('No barcode detected in image');
+      return {
+        detected: false,
+        upc_code: null,
+        confidence: null,
+        format: null,
+        error: null,
+      };
+    }
+
+    // Take the first (best) result
+    const bestResult = results[0];
+    const format = formatMap[bestResult.format] || 'unknown';
+
+    // Calculate confidence based on result quality indicators
+    // zxing-wasm doesn't provide direct confidence, so we estimate based on format match
+    const confidence = bestResult.text ? 0.95 : 0.5;
+
+    detectionLogger.info(
+      { upcCode: bestResult.text, format, confidence },
+      'Barcode detected successfully',
+    );
+
+    return {
+      detected: true,
+      upc_code: bestResult.text,
+      confidence,
+      format,
+      error: null,
+    };
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    detectionLogger.error({ err: error }, 'Barcode detection failed');
+
+    return {
+      detected: false,
+      upc_code: null,
+      confidence: null,
+      format: null,
+      error: errorMessage,
+    };
+  }
+};
+
+/**
+ * Validates a UPC code format.
+ * @param code The code to validate
+ * @returns True if valid UPC format
+ */
+export const isValidUpcFormat = (code: string): boolean => {
+  // UPC-A: 12 digits
+  // UPC-E: 8 digits
+  // EAN-13: 13 digits
+  // EAN-8: 8 digits
+  return /^[0-9]{8,14}$/.test(code);
+};
+
+/**
+ * Calculates the check digit for a UPC-A code.
+ * @param code The 11-digit UPC-A code (without check digit)
+ * @returns The check digit
+ */
+export const calculateUpcCheckDigit = (code: string): number | null => {
+  if (code.length !== 11 || !/^\d+$/.test(code)) {
+    return null;
+  }
+
+  let sum = 0;
+  for (let i = 0; i < 11; i++) {
+    const digit = parseInt(code[i], 10);
+    // Odd positions (0, 2, 4, ...) multiplied by 3
+    // Even positions (1, 3, 5, ...) multiplied by 1
+    sum += digit * (i % 2 === 0 ? 3 : 1);
+  }
+
+  const checkDigit = (10 - (sum % 10)) % 10;
+  return checkDigit;
+};
+
+/**
+ * Validates a UPC code including check digit.
+ * @param code The complete UPC code
+ * @returns True if check digit is valid
+ */
+export const validateUpcCheckDigit = (code: string): boolean => {
+  if (code.length !== 12 || !/^\d+$/.test(code)) {
+    return false;
+  }
+
+  const codeWithoutCheck = code.slice(0, 11);
+  const providedCheck = parseInt(code[11], 10);
+  const calculatedCheck = calculateUpcCheckDigit(codeWithoutCheck);
+
+  return calculatedCheck === providedCheck;
+};
+
+/**
+ * Processes a barcode detection job from the queue.
+ * @param job The BullMQ job
+ * @param logger Pino logger instance
+ * @returns Detection result
+ */
+export const processBarcodeDetectionJob = async (
+  job: Job<BarcodeDetectionJobData>,
+  logger: Logger,
+): Promise<BarcodeDetectionResult> => {
+  const { scanId, imagePath, userId } = job.data;
+  const jobLogger = logger.child({
+    jobId: job.id,
+    scanId,
+    userId,
+    requestId: job.data.meta?.requestId,
+  });
+
+  jobLogger.info('Processing barcode detection job');
+
+  try {
+    // Attempt barcode detection
+    const result = await detectBarcode(imagePath, jobLogger);
+
+    // If a code was detected, update the scan record
+    if (result.detected && result.upc_code) {
+      await upcRepo.updateScanWithDetectedCode(
+        scanId,
+        result.upc_code,
+        result.confidence,
+        jobLogger,
+      );
+
+      jobLogger.info(
+        { upcCode: result.upc_code, confidence: result.confidence },
+        'Barcode detected and scan record updated',
+      );
+    } else {
+      jobLogger.info('No barcode detected in image');
+    }
+
+    return result;
+  } catch (error) {
+    jobLogger.error({ err: error }, 'Barcode detection job failed');
+
+    return {
+      detected: false,
+      upc_code: null,
+      confidence: null,
+      format: null,
+      error: error instanceof Error ? error.message : String(error),
+    };
+  }
+};
+
+/**
+ * Detects multiple barcodes in an image.
+ * Useful for receipts or product lists with multiple items.
+ * @param imagePath Path to the image file
+ * @param logger Pino logger instance
+ * @returns Array of detection results
+ */
+export const detectMultipleBarcodes = async (
+  imagePath: string,
+  logger: Logger,
+): Promise<BarcodeDetectionResult[]> => {
+  const detectionLogger = logger.child({ imagePath });
+  detectionLogger.info('Starting multiple barcode detection');
+
+  try {
+    const { readBarcodesFromImageData } = await import('zxing-wasm/reader');
+
+    // Read and process the image
+    const imageBuffer = await fs.readFile(imagePath);
+    const image = sharp(imageBuffer);
+
+    const { data, info } = await image.ensureAlpha().raw().toBuffer({ resolveWithObject: true });
+
+    const imageData = {
+      data: new Uint8ClampedArray(data),
+      width: info.width,
+      height: info.height,
+      colorSpace: 'srgb' as const,
+    };
+
+    // Detect all barcodes
+    const results = await readBarcodesFromImageData(imageData as ImageData, {
+      tryHarder: true,
+      tryRotate: true,
+      tryInvert: true,
+      formats: ['UPC-A', 'UPC-E', 'EAN-13', 'EAN-8', 'Code128', 'Code39'],
+    });
+
+    detectionLogger.info({ count: results.length }, 'Multiple barcode detection complete');
+
+    return results.map((result) => ({
+      detected: true,
+      upc_code: result.text,
+      confidence: 0.95,
+      format: formatMap[result.format] || 'unknown',
+      error: null,
+    }));
+  } catch (error) {
+    detectionLogger.error({ err: error }, 'Multiple barcode detection failed');
+    return [];
+  }
+};
+
+/**
+ * Enhances image for better barcode detection.
+ * Applies preprocessing like grayscale conversion, contrast adjustment, etc.
+ * @param imagePath Path to the source image
+ * @param logger Pino logger instance
+ * @returns Path to enhanced image (or original if enhancement fails)
+ */
+export const enhanceImageForDetection = async (
+  imagePath: string,
+  logger: Logger,
+): Promise<string> => {
+  const detectionLogger = logger.child({ imagePath });
+
+  try {
+    // Create enhanced version with improved contrast for barcode detection
+    const enhancedPath = imagePath.replace(/(\.[^.]+)$/, '-enhanced$1');
+
+    await sharp(imagePath)
+      .grayscale()
+      .normalize() // Improve contrast
+      .sharpen() // Enhance edges
+      .toFile(enhancedPath);
+
+    detectionLogger.debug({ enhancedPath }, 'Image enhanced for barcode detection');
+    return enhancedPath;
+  } catch (error) {
+    detectionLogger.warn({ err: error }, 'Image enhancement failed, using original');
+    return imagePath;
+  }
+};
--- a/src/services/db/expiry.db.test.ts
+++ b/src/services/db/expiry.db.test.ts
--- a/src/services/db/expiry.db.ts
+++ b/src/services/db/expiry.db.ts
--- a/src/services/db/index.db.ts
+++ b/src/services/db/index.db.ts
@@ -12,6 +12,9 @@ import { GamificationRepository } from './gamification.db';
 import { AdminRepository } from './admin.db';
 import { reactionRepo } from './reaction.db';
 import { conversionRepo } from './conversion.db';
+import { UpcRepository } from './upc.db';
+import { ExpiryRepository } from './expiry.db';
+import { ReceiptRepository } from './receipt.db';

 const userRepo = new UserRepository();
 const flyerRepo = new FlyerRepository();
@@ -23,6 +26,9 @@ const notificationRepo = new NotificationRepository();
 const budgetRepo = new BudgetRepository();
 const gamificationRepo = new GamificationRepository();
 const adminRepo = new AdminRepository();
+const upcRepo = new UpcRepository();
+const expiryRepo = new ExpiryRepository();
+const receiptRepo = new ReceiptRepository();

 export {
  userRepo,
@@ -37,5 +43,8 @@ export {
  adminRepo,
  reactionRepo,
  conversionRepo,
+  upcRepo,
+  expiryRepo,
+  receiptRepo,
  withTransaction,
 };
--- a/src/services/db/receipt.db.test.ts
+++ b/src/services/db/receipt.db.test.ts
--- a/src/services/db/receipt.db.ts
+++ b/src/services/db/receipt.db.ts
--- a/src/services/db/upc.db.test.ts
+++ b/src/services/db/upc.db.test.ts
@@ -0,0 +1,518 @@
+// src/services/db/upc.db.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { Logger } from 'pino';
+import { createMockLogger } from '../../tests/utils/mockLogger';
+import { UpcRepository } from './upc.db';
+import { NotFoundError } from './errors.db';
+
+// Create mock pool
+const mockQuery = vi.fn();
+const mockPool = {
+  query: mockQuery,
+};
+
+describe('UpcRepository', () => {
+  let repo: UpcRepository;
+  let mockLogger: Logger;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockLogger = createMockLogger();
+    repo = new UpcRepository(mockPool);
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe('findProductByUpc', () => {
+    it('should return product when found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+        rows: [
+          {
+            product_id: 1,
+            name: 'Test Product',
+            description: 'A test product',
+            size: '500g',
+            upc_code: '012345678905',
+            master_item_id: 5,
+            brand_name: 'Test Brand',
+            category_name: 'Snacks',
+            image_url: null,
+          },
+        ],
+      });
+
+      const result = await repo.findProductByUpc('012345678905', mockLogger);
+
+      expect(result).not.toBeNull();
+      expect(result?.product_id).toBe(1);
+      expect(result?.name).toBe('Test Product');
+      expect(result?.brand).toBe('Test Brand');
+      expect(result?.category).toBe('Snacks');
+      expect(mockQuery).toHaveBeenCalledWith(expect.stringContaining('WHERE p.upc_code = $1'), [
+        '012345678905',
+      ]);
+    });
+
+    it('should return null when product not found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+        rows: [],
+      });
+
+      const result = await repo.findProductByUpc('999999999999', mockLogger);
+
+      expect(result).toBeNull();
+    });
+
+    it('should throw on database error', async () => {
+      mockQuery.mockRejectedValueOnce(new Error('DB connection failed'));
+
+      await expect(repo.findProductByUpc('012345678905', mockLogger)).rejects.toThrow();
+    });
+  });
+
+  describe('linkUpcToProduct', () => {
+    it('should link UPC to product successfully', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+        rows: [
+          {
+            product_id: 1,
+            name: 'Test Product',
+            brand_id: 1,
+            category_id: 1,
+            description: null,
+            size: null,
+            upc_code: '012345678905',
+            master_item_id: null,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+      });
+
+      const result = await repo.linkUpcToProduct(1, '012345678905', mockLogger);
+
+      expect(result.upc_code).toBe('012345678905');
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('UPDATE public.products SET upc_code = $1'),
+        ['012345678905', 1],
+      );
+    });
+
+    it('should throw NotFoundError when product not found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+        rows: [],
+      });
+
+      await expect(repo.linkUpcToProduct(999, '012345678905', mockLogger)).rejects.toThrow(
+        NotFoundError,
+      );
+    });
+  });
+
+  describe('recordScan', () => {
+    it('should record a scan successfully', async () => {
+      const scanRecord = {
+        scan_id: 1,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: 1,
+        scan_source: 'manual_entry',
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rows: [scanRecord],
+      });
+
+      const result = await repo.recordScan('user-1', '012345678905', 'manual_entry', mockLogger, {
+        productId: 1,
+        scanConfidence: 1.0,
+        lookupSuccessful: true,
+      });
+
+      expect(result.scan_id).toBe(1);
+      expect(result.upc_code).toBe('012345678905');
+      expect(result.lookup_successful).toBe(true);
+    });
+
+    it('should record scan with default options', async () => {
+      const scanRecord = {
+        scan_id: 2,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: null,
+        scan_source: 'image_upload',
+        scan_confidence: null,
+        raw_image_path: null,
+        lookup_successful: false,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rows: [scanRecord],
+      });
+
+      const result = await repo.recordScan('user-1', '012345678905', 'image_upload', mockLogger);
+
+      expect(result.product_id).toBeNull();
+      expect(result.lookup_successful).toBe(false);
+    });
+  });
+
+  describe('getScanHistory', () => {
+    it('should return paginated scan history', async () => {
+      // Count query
+      mockQuery.mockResolvedValueOnce({
+        rows: [{ count: '10' }],
+      });
+
+      // Data query
+      mockQuery.mockResolvedValueOnce({
+        rows: [
+          {
+            scan_id: 1,
+            user_id: 'user-1',
+            upc_code: '012345678905',
+            product_id: 1,
+            scan_source: 'manual_entry',
+            scan_confidence: 1.0,
+            raw_image_path: null,
+            lookup_successful: true,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+      });
+
+      const result = await repo.getScanHistory(
+        { user_id: 'user-1', limit: 10, offset: 0 },
+        mockLogger,
+      );
+
+      expect(result.total).toBe(10);
+      expect(result.scans).toHaveLength(1);
+    });
+
+    it('should filter by lookup_successful', async () => {
+      mockQuery.mockResolvedValueOnce({ rows: [{ count: '5' }] });
+      mockQuery.mockResolvedValueOnce({ rows: [] });
+
+      await repo.getScanHistory({ user_id: 'user-1', lookup_successful: true }, mockLogger);
+
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('lookup_successful = $2'),
+        expect.any(Array),
+      );
+    });
+
+    it('should filter by scan_source', async () => {
+      mockQuery.mockResolvedValueOnce({ rows: [{ count: '3' }] });
+      mockQuery.mockResolvedValueOnce({ rows: [] });
+
+      await repo.getScanHistory({ user_id: 'user-1', scan_source: 'image_upload' }, mockLogger);
+
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('scan_source = $2'),
+        expect.any(Array),
+      );
+    });
+
+    it('should filter by date range', async () => {
+      mockQuery.mockResolvedValueOnce({ rows: [{ count: '2' }] });
+      mockQuery.mockResolvedValueOnce({ rows: [] });
+
+      await repo.getScanHistory(
+        {
+          user_id: 'user-1',
+          from_date: '2024-01-01',
+          to_date: '2024-01-31',
+        },
+        mockLogger,
+      );
+
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('created_at >= $2'),
+        expect.any(Array),
+      );
+    });
+  });
+
+  describe('getScanById', () => {
+    it('should return scan record when found', async () => {
+      const scanRecord = {
+        scan_id: 1,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: 1,
+        scan_source: 'manual_entry',
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+        rows: [scanRecord],
+      });
+
+      const result = await repo.getScanById(1, 'user-1', mockLogger);
+
+      expect(result.scan_id).toBe(1);
+      expect(result.user_id).toBe('user-1');
+    });
+
+    it('should throw NotFoundError when scan not found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+        rows: [],
+      });
+
+      await expect(repo.getScanById(999, 'user-1', mockLogger)).rejects.toThrow(NotFoundError);
+    });
+  });
+
+  describe('findExternalLookup', () => {
+    it('should return cached lookup when found and not expired', async () => {
+      const lookupRecord = {
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'External Product',
+        brand_name: 'External Brand',
+        category: 'Snacks',
+        description: null,
+        image_url: null,
+        external_source: 'openfoodfacts',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+        rows: [lookupRecord],
+      });
+
+      const result = await repo.findExternalLookup('012345678905', 168, mockLogger);
+
+      expect(result).not.toBeNull();
+      expect(result?.product_name).toBe('External Product');
+    });
+
+    it('should return null when lookup not cached', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+        rows: [],
+      });
+
+      const result = await repo.findExternalLookup('999999999999', 168, mockLogger);
+
+      expect(result).toBeNull();
+    });
+  });
+
+  describe('upsertExternalLookup', () => {
+    it('should insert new external lookup', async () => {
+      const lookupRecord = {
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'New Product',
+        brand_name: 'New Brand',
+        category: 'Food',
+        description: 'A description',
+        image_url: 'https://example.com/image.jpg',
+        external_source: 'openfoodfacts',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rows: [lookupRecord],
+      });
+
+      const result = await repo.upsertExternalLookup(
+        '012345678905',
+        'openfoodfacts',
+        true,
+        mockLogger,
+        {
+          productName: 'New Product',
+          brandName: 'New Brand',
+          category: 'Food',
+          description: 'A description',
+          imageUrl: 'https://example.com/image.jpg',
+        },
+      );
+
+      expect(result.product_name).toBe('New Product');
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('ON CONFLICT (upc_code) DO UPDATE'),
+        expect.any(Array),
+      );
+    });
+
+    it('should update existing external lookup on conflict', async () => {
+      const updatedRecord = {
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'Updated Product',
+        brand_name: 'Updated Brand',
+        category: null,
+        description: null,
+        image_url: null,
+        external_source: 'upcitemdb',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rows: [updatedRecord],
+      });
+
+      const result = await repo.upsertExternalLookup(
+        '012345678905',
+        'upcitemdb',
+        true,
+        mockLogger,
+        {
+          productName: 'Updated Product',
+          brandName: 'Updated Brand',
+        },
+      );
+
+      expect(result.product_name).toBe('Updated Product');
+      expect(result.external_source).toBe('upcitemdb');
+    });
+  });
+
+  describe('getExternalLookupByUpc', () => {
+    it('should return lookup without cache expiry check', async () => {
+      const lookupRecord = {
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'Product',
+        brand_name: null,
+        category: null,
+        description: null,
+        image_url: null,
+        external_source: 'openfoodfacts',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+        rows: [lookupRecord],
+      });
+
+      const result = await repo.getExternalLookupByUpc('012345678905', mockLogger);
+
+      expect(result?.product_name).toBe('Product');
+      expect(mockQuery).toHaveBeenCalledWith(expect.not.stringContaining('interval'), [
+        '012345678905',
+      ]);
+    });
+
+    it('should return null when not found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+        rows: [],
+      });
+
+      const result = await repo.getExternalLookupByUpc('999999999999', mockLogger);
+
+      expect(result).toBeNull();
+    });
+  });
+
+  describe('deleteOldExternalLookups', () => {
+    it('should delete old lookups and return count', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 5,
+      });
+
+      const deleted = await repo.deleteOldExternalLookups(30, mockLogger);
+
+      expect(deleted).toBe(5);
+      expect(mockQuery).toHaveBeenCalledWith(expect.stringContaining("interval '1 day'"), [30]);
+    });
+
+    it('should return 0 when no records deleted', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+      });
+
+      const deleted = await repo.deleteOldExternalLookups(30, mockLogger);
+
+      expect(deleted).toBe(0);
+    });
+  });
+
+  describe('getUserScanStats', () => {
+    it('should return user scan statistics', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rows: [
+          {
+            total_scans: '100',
+            successful_lookups: '80',
+            unique_products: '50',
+            scans_today: '5',
+            scans_this_week: '25',
+          },
+        ],
+      });
+
+      const stats = await repo.getUserScanStats('user-1', mockLogger);
+
+      expect(stats.total_scans).toBe(100);
+      expect(stats.successful_lookups).toBe(80);
+      expect(stats.unique_products).toBe(50);
+      expect(stats.scans_today).toBe(5);
+      expect(stats.scans_this_week).toBe(25);
+    });
+  });
+
+  describe('updateScanWithDetectedCode', () => {
+    it('should update scan with detected code', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 1,
+      });
+
+      await repo.updateScanWithDetectedCode(1, '012345678905', 0.95, mockLogger);
+
+      expect(mockQuery).toHaveBeenCalledWith(
+        expect.stringContaining('UPDATE public.upc_scan_history'),
+        [1, '012345678905', 0.95],
+      );
+    });
+
+    it('should throw NotFoundError when scan not found', async () => {
+      mockQuery.mockResolvedValueOnce({
+        rowCount: 0,
+      });
+
+      await expect(
+        repo.updateScanWithDetectedCode(999, '012345678905', 0.95, mockLogger),
+      ).rejects.toThrow(NotFoundError);
+    });
+  });
+});
--- a/src/services/db/upc.db.ts
+++ b/src/services/db/upc.db.ts
@@ -0,0 +1,556 @@
+// src/services/db/upc.db.ts
+import type { Pool, PoolClient } from 'pg';
+import { getPool } from './connection.db';
+import { NotFoundError, handleDbError } from './errors.db';
+import type { Logger } from 'pino';
+import type {
+  UpcScanSource,
+  UpcExternalSource,
+  UpcScanHistoryRecord,
+  UpcExternalLookupRecord,
+  UpcProductMatch,
+  UpcScanHistoryQueryOptions,
+} from '../../types/upc';
+
+/**
+ * Database row type for products table with UPC-relevant fields.
+ */
+interface ProductRow {
+  product_id: number;
+  name: string;
+  brand_id: number | null;
+  category_id: number | null;
+  description: string | null;
+  size: string | null;
+  upc_code: string | null;
+  master_item_id: number | null;
+  created_at: string;
+  updated_at: string;
+}
+
+/**
+ * Extended product row with joined brand and category names.
+ */
+interface ProductWithDetailsRow extends ProductRow {
+  brand_name: string | null;
+  category_name: string | null;
+  image_url: string | null;
+}
+
+/**
+ * Repository for UPC scanning related database operations.
+ * Handles scan history tracking, external lookup caching, and product UPC matching.
+ */
+export class UpcRepository {
+  private db: Pick<Pool | PoolClient, 'query'>;
+
+  constructor(db: Pick<Pool | PoolClient, 'query'> = getPool()) {
+    this.db = db;
+  }
+
+  // ============================================================================
+  // PRODUCT UPC LOOKUP
+  // ============================================================================
+
+  /**
+   * Finds a product by its UPC code.
+   * Returns null if no product is found with the given UPC.
+   */
+  async findProductByUpc(upcCode: string, logger: Logger): Promise<UpcProductMatch | null> {
+    try {
+      const query = `
+        SELECT
+          p.product_id,
+          p.name,
+          p.description,
+          p.size,
+          p.upc_code,
+          p.master_item_id,
+          b.name AS brand_name,
+          c.name AS category_name,
+          NULL AS image_url
+        FROM public.products p
+        LEFT JOIN public.brands b ON p.brand_id = b.brand_id
+        LEFT JOIN public.master_grocery_items mgi ON p.master_item_id = mgi.master_grocery_item_id
+        LEFT JOIN public.categories c ON mgi.category_id = c.category_id
+        WHERE p.upc_code = $1
+      `;
+      const res = await this.db.query<ProductWithDetailsRow>(query, [upcCode]);
+
+      if (res.rowCount === 0) {
+        return null;
+      }
+
+      const row = res.rows[0];
+      return {
+        product_id: row.product_id,
+        name: row.name,
+        brand: row.brand_name,
+        category: row.category_name,
+        description: row.description,
+        size: row.size,
+        upc_code: row.upc_code ?? upcCode,
+        image_url: row.image_url,
+        master_item_id: row.master_item_id,
+      };
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in findProductByUpc',
+        { upcCode },
+        {
+          defaultMessage: 'Failed to look up product by UPC code.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Links a UPC code to an existing product.
+   * Updates the product's upc_code field.
+   */
+  async linkUpcToProduct(productId: number, upcCode: string, logger: Logger): Promise<ProductRow> {
+    try {
+      const res = await this.db.query<ProductRow>(
+        `UPDATE public.products SET upc_code = $1, updated_at = NOW() WHERE product_id = $2 RETURNING *`,
+        [upcCode, productId],
+      );
+
+      if (res.rowCount === 0) {
+        throw new NotFoundError('Product not found.');
+      }
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in linkUpcToProduct',
+        { productId, upcCode },
+        {
+          uniqueMessage: 'This UPC code is already linked to another product.',
+          fkMessage: 'The specified product does not exist.',
+          defaultMessage: 'Failed to link UPC code to product.',
+        },
+      );
+    }
+  }
+
+  // ============================================================================
+  // SCAN HISTORY
+  // ============================================================================
+
+  /**
+   * Records a UPC scan in the history table.
+   * Creates an audit trail of all scans performed by users.
+   */
+  async recordScan(
+    userId: string,
+    upcCode: string,
+    scanSource: UpcScanSource,
+    logger: Logger,
+    options: {
+      productId?: number | null;
+      scanConfidence?: number | null;
+      rawImagePath?: string | null;
+      lookupSuccessful?: boolean;
+    } = {},
+  ): Promise<UpcScanHistoryRecord> {
+    const {
+      productId = null,
+      scanConfidence = null,
+      rawImagePath = null,
+      lookupSuccessful = false,
+    } = options;
+
+    try {
+      const res = await this.db.query<UpcScanHistoryRecord>(
+        `INSERT INTO public.upc_scan_history
+         (user_id, upc_code, product_id, scan_source, scan_confidence, raw_image_path, lookup_successful)
+         VALUES ($1, $2, $3, $4, $5, $6, $7)
+         RETURNING *`,
+        [userId, upcCode, productId, scanSource, scanConfidence, rawImagePath, lookupSuccessful],
+      );
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in recordScan',
+        { userId, upcCode, scanSource, productId },
+        {
+          fkMessage: 'The specified user or product does not exist.',
+          checkMessage: 'Invalid UPC code format or scan source.',
+          defaultMessage: 'Failed to record UPC scan.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Retrieves the scan history for a user with optional filtering.
+   */
+  async getScanHistory(
+    options: UpcScanHistoryQueryOptions,
+    logger: Logger,
+  ): Promise<{ scans: UpcScanHistoryRecord[]; total: number }> {
+    const {
+      user_id,
+      limit = 50,
+      offset = 0,
+      lookup_successful,
+      scan_source,
+      from_date,
+      to_date,
+    } = options;
+
+    try {
+      // Build dynamic WHERE clause
+      const conditions: string[] = ['user_id = $1'];
+      const params: (string | number | boolean)[] = [user_id];
+      let paramIndex = 2;
+
+      if (lookup_successful !== undefined) {
+        conditions.push(`lookup_successful = $${paramIndex++}`);
+        params.push(lookup_successful);
+      }
+
+      if (scan_source) {
+        conditions.push(`scan_source = $${paramIndex++}`);
+        params.push(scan_source);
+      }
+
+      if (from_date) {
+        conditions.push(`created_at >= $${paramIndex++}`);
+        params.push(from_date);
+      }
+
+      if (to_date) {
+        conditions.push(`created_at <= $${paramIndex++}`);
+        params.push(to_date);
+      }
+
+      const whereClause = conditions.join(' AND ');
+
+      // Get total count
+      const countRes = await this.db.query<{ count: string }>(
+        `SELECT COUNT(*) FROM public.upc_scan_history WHERE ${whereClause}`,
+        params,
+      );
+      const total = parseInt(countRes.rows[0].count, 10);
+
+      // Get paginated results
+      const dataParams = [...params, limit, offset];
+      const dataRes = await this.db.query<UpcScanHistoryRecord>(
+        `SELECT * FROM public.upc_scan_history
+         WHERE ${whereClause}
+         ORDER BY created_at DESC
+         LIMIT $${paramIndex++} OFFSET $${paramIndex}`,
+        dataParams,
+      );
+
+      return { scans: dataRes.rows, total };
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in getScanHistory',
+        { options },
+        {
+          defaultMessage: 'Failed to retrieve scan history.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Gets a single scan record by ID.
+   */
+  async getScanById(scanId: number, userId: string, logger: Logger): Promise<UpcScanHistoryRecord> {
+    try {
+      const res = await this.db.query<UpcScanHistoryRecord>(
+        `SELECT * FROM public.upc_scan_history WHERE scan_id = $1 AND user_id = $2`,
+        [scanId, userId],
+      );
+
+      if (res.rowCount === 0) {
+        throw new NotFoundError('Scan record not found.');
+      }
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in getScanById',
+        { scanId, userId },
+        {
+          defaultMessage: 'Failed to retrieve scan record.',
+        },
+      );
+    }
+  }
+
+  // ============================================================================
+  // EXTERNAL LOOKUP CACHE
+  // ============================================================================
+
+  /**
+   * Finds a cached external lookup result for a UPC code.
+   * Returns null if not cached or cache is expired.
+   */
+  async findExternalLookup(
+    upcCode: string,
+    maxAgeHours: number,
+    logger: Logger,
+  ): Promise<UpcExternalLookupRecord | null> {
+    try {
+      const res = await this.db.query<UpcExternalLookupRecord>(
+        `SELECT * FROM public.upc_external_lookups
+         WHERE upc_code = $1
+         AND created_at > NOW() - ($2 * interval '1 hour')`,
+        [upcCode, maxAgeHours],
+      );
+
+      if (res.rowCount === 0) {
+        return null;
+      }
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in findExternalLookup',
+        { upcCode, maxAgeHours },
+        {
+          defaultMessage: 'Failed to find cached external lookup.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Creates or updates a cached external lookup result.
+   * Uses UPSERT to handle both new and existing records.
+   */
+  async upsertExternalLookup(
+    upcCode: string,
+    externalSource: UpcExternalSource,
+    lookupSuccessful: boolean,
+    logger: Logger,
+    data: {
+      productName?: string | null;
+      brandName?: string | null;
+      category?: string | null;
+      description?: string | null;
+      imageUrl?: string | null;
+      lookupData?: Record<string, unknown> | null;
+    } = {},
+  ): Promise<UpcExternalLookupRecord> {
+    const {
+      productName = null,
+      brandName = null,
+      category = null,
+      description = null,
+      imageUrl = null,
+      lookupData = null,
+    } = data;
+
+    try {
+      const res = await this.db.query<UpcExternalLookupRecord>(
+        `INSERT INTO public.upc_external_lookups
+         (upc_code, product_name, brand_name, category, description, image_url, external_source, lookup_data, lookup_successful)
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+         ON CONFLICT (upc_code) DO UPDATE SET
+           product_name = EXCLUDED.product_name,
+           brand_name = EXCLUDED.brand_name,
+           category = EXCLUDED.category,
+           description = EXCLUDED.description,
+           image_url = EXCLUDED.image_url,
+           external_source = EXCLUDED.external_source,
+           lookup_data = EXCLUDED.lookup_data,
+           lookup_successful = EXCLUDED.lookup_successful,
+           updated_at = NOW()
+         RETURNING *`,
+        [
+          upcCode,
+          productName,
+          brandName,
+          category,
+          description,
+          imageUrl,
+          externalSource,
+          lookupData ? JSON.stringify(lookupData) : null,
+          lookupSuccessful,
+        ],
+      );
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in upsertExternalLookup',
+        { upcCode, externalSource, lookupSuccessful },
+        {
+          checkMessage: 'Invalid UPC code format or external source.',
+          defaultMessage: 'Failed to cache external lookup result.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Gets an external lookup record by UPC code (without cache expiry check).
+   */
+  async getExternalLookupByUpc(
+    upcCode: string,
+    logger: Logger,
+  ): Promise<UpcExternalLookupRecord | null> {
+    try {
+      const res = await this.db.query<UpcExternalLookupRecord>(
+        `SELECT * FROM public.upc_external_lookups WHERE upc_code = $1`,
+        [upcCode],
+      );
+
+      if (res.rowCount === 0) {
+        return null;
+      }
+
+      return res.rows[0];
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in getExternalLookupByUpc',
+        { upcCode },
+        {
+          defaultMessage: 'Failed to get external lookup record.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Deletes old external lookup cache entries.
+   * Used for periodic cleanup.
+   */
+  async deleteOldExternalLookups(daysOld: number, logger: Logger): Promise<number> {
+    try {
+      const res = await this.db.query(
+        `DELETE FROM public.upc_external_lookups WHERE updated_at < NOW() - ($1 * interval '1 day')`,
+        [daysOld],
+      );
+      return res.rowCount ?? 0;
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in deleteOldExternalLookups',
+        { daysOld },
+        {
+          defaultMessage: 'Failed to delete old external lookups.',
+        },
+      );
+    }
+  }
+
+  // ============================================================================
+  // STATISTICS
+  // ============================================================================
+
+  /**
+   * Gets scan statistics for a user.
+   */
+  async getUserScanStats(
+    userId: string,
+    logger: Logger,
+  ): Promise<{
+    total_scans: number;
+    successful_lookups: number;
+    unique_products: number;
+    scans_today: number;
+    scans_this_week: number;
+  }> {
+    try {
+      const res = await this.db.query<{
+        total_scans: string;
+        successful_lookups: string;
+        unique_products: string;
+        scans_today: string;
+        scans_this_week: string;
+      }>(
+        `SELECT
+          COUNT(*) AS total_scans,
+          COUNT(*) FILTER (WHERE lookup_successful = true) AS successful_lookups,
+          COUNT(DISTINCT product_id) FILTER (WHERE product_id IS NOT NULL) AS unique_products,
+          COUNT(*) FILTER (WHERE created_at >= CURRENT_DATE) AS scans_today,
+          COUNT(*) FILTER (WHERE created_at >= CURRENT_DATE - interval '7 days') AS scans_this_week
+         FROM public.upc_scan_history
+         WHERE user_id = $1`,
+        [userId],
+      );
+
+      const row = res.rows[0];
+      return {
+        total_scans: parseInt(row.total_scans, 10),
+        successful_lookups: parseInt(row.successful_lookups, 10),
+        unique_products: parseInt(row.unique_products, 10),
+        scans_today: parseInt(row.scans_today, 10),
+        scans_this_week: parseInt(row.scans_this_week, 10),
+      };
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in getUserScanStats',
+        { userId },
+        {
+          defaultMessage: 'Failed to get scan statistics.',
+        },
+      );
+    }
+  }
+
+  /**
+   * Updates a scan record with the detected UPC code from image processing.
+   * Used by the barcode detection worker after processing an uploaded image.
+   */
+  async updateScanWithDetectedCode(
+    scanId: number,
+    upcCode: string,
+    confidence: number | null,
+    logger: Logger,
+  ): Promise<void> {
+    try {
+      const query = `
+        UPDATE public.upc_scan_history
+        SET
+          upc_code = $2,
+          scan_confidence = $3,
+          updated_at = NOW()
+        WHERE scan_id = $1
+      `;
+      const res = await this.db.query(query, [scanId, upcCode, confidence]);
+
+      if (res.rowCount === 0) {
+        throw new NotFoundError('Scan record not found.');
+      }
+
+      logger.info({ scanId, upcCode, confidence }, 'Updated scan with detected code');
+    } catch (error) {
+      handleDbError(
+        error,
+        logger,
+        'Database error in updateScanWithDetectedCode',
+        { scanId, upcCode },
+        {
+          defaultMessage: 'Failed to update scan with detected code.',
+        },
+      );
+    }
+  }
+}
--- a/src/services/expiryService.server.test.ts
+++ b/src/services/expiryService.server.test.ts
@@ -0,0 +1,933 @@
+// src/services/expiryService.server.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { Logger } from 'pino';
+import type { Job } from 'bullmq';
+import type { ExpiryAlertJobData } from '../types/job-data';
+import { createMockLogger } from '../tests/utils/mockLogger';
+import type {
+  InventorySource,
+  StorageLocation,
+  ExpiryStatus,
+  ExpiryRangeSource,
+  AlertMethod,
+  UserInventoryItem,
+  ReceiptStatus,
+  ReceiptItemStatus,
+  ExpiryAlertLogRecord,
+  ExpiryAlertType,
+} from '../types/expiry';
+
+// Mock dependencies
+vi.mock('./db/index.db', () => ({
+  expiryRepo: {
+    addInventoryItem: vi.fn(),
+    updateInventoryItem: vi.fn(),
+    markAsConsumed: vi.fn(),
+    deleteInventoryItem: vi.fn(),
+    getInventoryItemById: vi.fn(),
+    getInventory: vi.fn(),
+    getExpiringItems: vi.fn(),
+    getExpiredItems: vi.fn(),
+    getExpiryRangeForItem: vi.fn(),
+    getExpiryRanges: vi.fn(),
+    addExpiryRange: vi.fn(),
+    getUserAlertSettings: vi.fn(),
+    upsertAlertSettings: vi.fn(),
+    getUsersWithExpiringItems: vi.fn(),
+    logAlert: vi.fn(),
+    markAlertSent: vi.fn(),
+    getRecipesForExpiringItems: vi.fn(),
+  },
+  receiptRepo: {
+    getReceiptById: vi.fn(),
+    getReceiptItems: vi.fn(),
+    updateReceiptItem: vi.fn(),
+  },
+}));
+
+vi.mock('./emailService.server', () => ({
+  sendEmail: vi.fn(),
+}));
+
+vi.mock('./logger.server', () => ({
+  logger: {
+    child: vi.fn().mockReturnThis(),
+    debug: vi.fn(),
+    info: vi.fn(),
+    warn: vi.fn(),
+    error: vi.fn(),
+  },
+}));
+
+// Import after mocks are set up
+import {
+  addInventoryItem,
+  updateInventoryItem,
+  markItemConsumed,
+  deleteInventoryItem,
+  getInventoryItemById,
+  getInventory,
+  getExpiringItemsGrouped,
+  getExpiringItems,
+  getExpiredItems,
+  calculateExpiryDate,
+  getExpiryRanges,
+  addExpiryRange,
+  getAlertSettings,
+  updateAlertSettings,
+  processExpiryAlerts,
+  addItemsFromReceipt,
+  getRecipeSuggestionsForExpiringItems,
+  processExpiryAlertJob,
+} from './expiryService.server';
+
+import { expiryRepo, receiptRepo } from './db/index.db';
+import * as emailService from './emailService.server';
+
+// Helper to create mock alert log record
+function createMockAlertLogRecord(
+  overrides: Partial<ExpiryAlertLogRecord> = {},
+): ExpiryAlertLogRecord {
+  return {
+    alert_log_id: 1,
+    user_id: 'user-1',
+    pantry_item_id: null,
+    alert_type: 'expiring_soon' as ExpiryAlertType,
+    alert_method: 'email' as AlertMethod,
+    item_name: 'Test Item',
+    expiry_date: null,
+    days_until_expiry: null,
+    sent_at: new Date().toISOString(),
+    ...overrides,
+  };
+}
+
+describe('expiryService.server', () => {
+  let mockLogger: Logger;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockLogger = createMockLogger();
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe('addInventoryItem', () => {
+    it('should add item to inventory without expiry date', async () => {
+      const mockItem: UserInventoryItem = {
+        inventory_id: 1,
+        user_id: 'user-1',
+        product_id: null,
+        master_item_id: null,
+        item_name: 'Milk',
+        quantity: 1,
+        unit: 'gallon',
+        purchase_date: null,
+        expiry_date: null,
+        source: 'manual',
+        location: 'fridge',
+        notes: null,
+        is_consumed: false,
+        consumed_at: null,
+        expiry_source: null,
+        receipt_item_id: null,
+        pantry_location_id: null,
+        notification_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+        days_until_expiry: null,
+        expiry_status: 'unknown',
+      };
+
+      vi.mocked(expiryRepo.addInventoryItem).mockResolvedValueOnce(mockItem);
+
+      const result = await addInventoryItem(
+        'user-1',
+        { item_name: 'Milk', quantity: 1, source: 'manual', location: 'fridge' },
+        mockLogger,
+      );
+
+      expect(result.inventory_id).toBe(1);
+      expect(result.item_name).toBe('Milk');
+    });
+
+    it('should calculate expiry date when purchase date and location provided', async () => {
+      const mockItem: UserInventoryItem = {
+        inventory_id: 2,
+        user_id: 'user-1',
+        product_id: null,
+        master_item_id: 5,
+        item_name: 'Milk',
+        quantity: 1,
+        unit: 'gallon',
+        purchase_date: '2024-01-15',
+        expiry_date: '2024-01-22', // calculated
+        source: 'manual',
+        location: 'fridge',
+        notes: null,
+        is_consumed: false,
+        consumed_at: null,
+        expiry_source: 'calculated',
+        receipt_item_id: null,
+        pantry_location_id: null,
+        notification_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+        days_until_expiry: 7,
+        expiry_status: 'fresh',
+      };
+
+      vi.mocked(expiryRepo.getExpiryRangeForItem).mockResolvedValueOnce({
+        expiry_range_id: 1,
+        master_item_id: 5,
+        category_id: null,
+        item_pattern: null,
+        storage_location: 'fridge',
+        min_days: 5,
+        max_days: 10,
+        typical_days: 7,
+        notes: null,
+        source: 'usda',
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      vi.mocked(expiryRepo.addInventoryItem).mockResolvedValueOnce(mockItem);
+
+      const result = await addInventoryItem(
+        'user-1',
+        {
+          item_name: 'Milk',
+          master_item_id: 5,
+          quantity: 1,
+          source: 'manual',
+          location: 'fridge',
+          purchase_date: '2024-01-15',
+        },
+        mockLogger,
+      );
+
+      expect(result.expiry_date).toBe('2024-01-22');
+    });
+  });
+
+  describe('updateInventoryItem', () => {
+    it('should update inventory item', async () => {
+      const mockUpdatedItem: UserInventoryItem = {
+        inventory_id: 1,
+        user_id: 'user-1',
+        product_id: null,
+        master_item_id: null,
+        item_name: 'Milk',
+        quantity: 2, // updated
+        unit: 'gallon',
+        purchase_date: null,
+        expiry_date: '2024-01-25',
+        source: 'manual',
+        location: 'fridge',
+        notes: 'Almost gone',
+        is_consumed: false,
+        consumed_at: null,
+        expiry_source: null,
+        receipt_item_id: null,
+        pantry_location_id: null,
+        notification_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+        days_until_expiry: 5,
+        expiry_status: 'expiring_soon',
+      };
+
+      vi.mocked(expiryRepo.updateInventoryItem).mockResolvedValueOnce(mockUpdatedItem);
+
+      const result = await updateInventoryItem(
+        1,
+        'user-1',
+        { quantity: 2, notes: 'Almost gone' },
+        mockLogger,
+      );
+
+      expect(result.quantity).toBe(2);
+      expect(result.notes).toBe('Almost gone');
+    });
+  });
+
+  describe('markItemConsumed', () => {
+    it('should mark item as consumed', async () => {
+      vi.mocked(expiryRepo.markAsConsumed).mockResolvedValueOnce(undefined);
+
+      await markItemConsumed(1, 'user-1', mockLogger);
+
+      expect(expiryRepo.markAsConsumed).toHaveBeenCalledWith(1, 'user-1', mockLogger);
+    });
+  });
+
+  describe('deleteInventoryItem', () => {
+    it('should delete inventory item', async () => {
+      vi.mocked(expiryRepo.deleteInventoryItem).mockResolvedValueOnce(undefined);
+
+      await deleteInventoryItem(1, 'user-1', mockLogger);
+
+      expect(expiryRepo.deleteInventoryItem).toHaveBeenCalledWith(1, 'user-1', mockLogger);
+    });
+  });
+
+  describe('getInventoryItemById', () => {
+    it('should return inventory item by ID', async () => {
+      const mockItem: UserInventoryItem = {
+        inventory_id: 1,
+        user_id: 'user-1',
+        product_id: null,
+        master_item_id: null,
+        item_name: 'Eggs',
+        quantity: 12,
+        unit: null,
+        purchase_date: null,
+        expiry_date: null,
+        source: 'manual',
+        location: 'fridge',
+        notes: null,
+        is_consumed: false,
+        consumed_at: null,
+        expiry_source: null,
+        receipt_item_id: null,
+        pantry_location_id: null,
+        notification_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+        days_until_expiry: null,
+        expiry_status: 'unknown',
+      };
+
+      vi.mocked(expiryRepo.getInventoryItemById).mockResolvedValueOnce(mockItem);
+
+      const result = await getInventoryItemById(1, 'user-1', mockLogger);
+
+      expect(result.item_name).toBe('Eggs');
+    });
+  });
+
+  describe('getInventory', () => {
+    it('should return paginated inventory', async () => {
+      const mockInventory = {
+        items: [
+          {
+            inventory_id: 1,
+            user_id: 'user-1',
+            product_id: null,
+            master_item_id: null,
+            item_name: 'Butter',
+            quantity: 1,
+            unit: null,
+            purchase_date: null,
+            expiry_date: null,
+            source: 'manual' as InventorySource,
+            location: 'fridge' as StorageLocation,
+            notes: null,
+            is_consumed: false,
+            consumed_at: null,
+            expiry_source: null,
+            receipt_item_id: null,
+            pantry_location_id: null,
+            notification_sent_at: null,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+            days_until_expiry: null,
+            expiry_status: 'unknown' as ExpiryStatus,
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(expiryRepo.getInventory).mockResolvedValueOnce(mockInventory);
+
+      const result = await getInventory({ user_id: 'user-1', limit: 10, offset: 0 }, mockLogger);
+
+      expect(result.items).toHaveLength(1);
+      expect(result.total).toBe(1);
+    });
+
+    it('should filter by location', async () => {
+      vi.mocked(expiryRepo.getInventory).mockResolvedValueOnce({ items: [], total: 0 });
+
+      await getInventory({ user_id: 'user-1', location: 'freezer' }, mockLogger);
+
+      expect(expiryRepo.getInventory).toHaveBeenCalledWith(
+        { user_id: 'user-1', location: 'freezer' },
+        mockLogger,
+      );
+    });
+  });
+
+  describe('getExpiringItemsGrouped', () => {
+    it('should return items grouped by expiry urgency', async () => {
+      const expiringItems = [
+        createMockInventoryItem({ days_until_expiry: 0 }), // today
+        createMockInventoryItem({ days_until_expiry: 3 }), // this week
+        createMockInventoryItem({ days_until_expiry: 15 }), // this month
+      ];
+      const expiredItems = [createMockInventoryItem({ days_until_expiry: -2 })];
+
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce(expiringItems);
+      vi.mocked(expiryRepo.getExpiredItems).mockResolvedValueOnce(expiredItems);
+
+      const result = await getExpiringItemsGrouped('user-1', mockLogger);
+
+      expect(result.expiring_today).toHaveLength(1);
+      expect(result.expiring_this_week).toHaveLength(1);
+      expect(result.expiring_this_month).toHaveLength(1);
+      expect(result.already_expired).toHaveLength(1);
+      expect(result.counts.total).toBe(4);
+    });
+  });
+
+  describe('getExpiringItems', () => {
+    it('should return items expiring within specified days', async () => {
+      const mockItems = [createMockInventoryItem({ days_until_expiry: 5 })];
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce(mockItems);
+
+      const result = await getExpiringItems('user-1', 7, mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(expiryRepo.getExpiringItems).toHaveBeenCalledWith('user-1', 7, mockLogger);
+    });
+  });
+
+  describe('getExpiredItems', () => {
+    it('should return expired items', async () => {
+      const mockItems = [createMockInventoryItem({ days_until_expiry: -3 })];
+      vi.mocked(expiryRepo.getExpiredItems).mockResolvedValueOnce(mockItems);
+
+      const result = await getExpiredItems('user-1', mockLogger);
+
+      expect(result).toHaveLength(1);
+    });
+  });
+
+  describe('calculateExpiryDate', () => {
+    it('should calculate expiry date based on storage location', async () => {
+      vi.mocked(expiryRepo.getExpiryRangeForItem).mockResolvedValueOnce({
+        expiry_range_id: 1,
+        master_item_id: null,
+        category_id: 1,
+        item_pattern: null,
+        storage_location: 'fridge',
+        min_days: 7,
+        max_days: 14,
+        typical_days: 10,
+        notes: null,
+        source: 'usda',
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await calculateExpiryDate(
+        {
+          item_name: 'Cheese',
+          storage_location: 'fridge',
+          purchase_date: '2024-01-15',
+        },
+        mockLogger,
+      );
+
+      expect(result).toBe('2024-01-25'); // 10 days after purchase
+    });
+
+    it('should return null when no expiry range found', async () => {
+      vi.mocked(expiryRepo.getExpiryRangeForItem).mockResolvedValueOnce(null);
+
+      const result = await calculateExpiryDate(
+        {
+          item_name: 'Unknown Item',
+          storage_location: 'pantry',
+          purchase_date: '2024-01-15',
+        },
+        mockLogger,
+      );
+
+      expect(result).toBeNull();
+    });
+  });
+
+  describe('getExpiryRanges', () => {
+    it('should return paginated expiry ranges', async () => {
+      const mockRanges = {
+        ranges: [
+          {
+            expiry_range_id: 1,
+            master_item_id: null,
+            category_id: 1,
+            item_pattern: null,
+            storage_location: 'fridge' as StorageLocation,
+            min_days: 7,
+            max_days: 14,
+            typical_days: 10,
+            notes: null,
+            source: 'usda' as ExpiryRangeSource,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(expiryRepo.getExpiryRanges).mockResolvedValueOnce(mockRanges);
+
+      const result = await getExpiryRanges({}, mockLogger);
+
+      expect(result.ranges).toHaveLength(1);
+      expect(result.total).toBe(1);
+    });
+  });
+
+  describe('addExpiryRange', () => {
+    it('should add new expiry range', async () => {
+      const mockRange = {
+        expiry_range_id: 2,
+        master_item_id: null,
+        category_id: 2,
+        item_pattern: null,
+        storage_location: 'freezer' as StorageLocation,
+        min_days: 30,
+        max_days: 90,
+        typical_days: 60,
+        notes: 'Best stored in back of freezer',
+        source: 'manual' as ExpiryRangeSource,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(expiryRepo.addExpiryRange).mockResolvedValueOnce(mockRange);
+
+      const result = await addExpiryRange(
+        {
+          category_id: 2,
+          storage_location: 'freezer',
+          min_days: 30,
+          max_days: 90,
+          typical_days: 60,
+          notes: 'Best stored in back of freezer',
+        },
+        mockLogger,
+      );
+
+      expect(result.typical_days).toBe(60);
+    });
+  });
+
+  describe('getAlertSettings', () => {
+    it('should return user alert settings', async () => {
+      const mockSettings = [
+        {
+          expiry_alert_id: 1,
+          user_id: 'user-1',
+          days_before_expiry: 3,
+          alert_method: 'email' as AlertMethod,
+          is_enabled: true,
+          last_alert_sent_at: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(expiryRepo.getUserAlertSettings).mockResolvedValueOnce(mockSettings);
+
+      const result = await getAlertSettings('user-1', mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].alert_method).toBe('email');
+    });
+  });
+
+  describe('updateAlertSettings', () => {
+    it('should update alert settings', async () => {
+      const mockUpdatedSettings = {
+        expiry_alert_id: 1,
+        user_id: 'user-1',
+        days_before_expiry: 5,
+        alert_method: 'email' as AlertMethod,
+        is_enabled: true,
+        last_alert_sent_at: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(expiryRepo.upsertAlertSettings).mockResolvedValueOnce(mockUpdatedSettings);
+
+      const result = await updateAlertSettings(
+        'user-1',
+        'email',
+        { days_before_expiry: 5 },
+        mockLogger,
+      );
+
+      expect(result.days_before_expiry).toBe(5);
+    });
+  });
+
+  describe('processExpiryAlerts', () => {
+    it('should process alerts for users with expiring items', async () => {
+      vi.mocked(expiryRepo.getUsersWithExpiringItems).mockResolvedValueOnce([
+        {
+          user_id: 'user-1',
+          email: 'user1@example.com',
+          alert_method: 'email' as AlertMethod,
+          days_before_expiry: 3,
+        },
+      ]);
+
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce([
+        createMockInventoryItem({ days_until_expiry: 2 }),
+      ]);
+
+      vi.mocked(emailService.sendEmail).mockResolvedValueOnce(undefined);
+      vi.mocked(expiryRepo.logAlert).mockResolvedValue(createMockAlertLogRecord());
+      vi.mocked(expiryRepo.markAlertSent).mockResolvedValue(undefined);
+
+      const alertsSent = await processExpiryAlerts(mockLogger);
+
+      expect(alertsSent).toBe(1);
+    });
+
+    it('should skip users with no expiring items', async () => {
+      vi.mocked(expiryRepo.getUsersWithExpiringItems).mockResolvedValueOnce([
+        {
+          user_id: 'user-1',
+          email: 'user1@example.com',
+          alert_method: 'email' as AlertMethod,
+          days_before_expiry: 3,
+        },
+      ]);
+
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce([]);
+
+      const alertsSent = await processExpiryAlerts(mockLogger);
+
+      expect(alertsSent).toBe(0);
+    });
+  });
+
+  describe('addItemsFromReceipt', () => {
+    it('should add items from receipt to inventory', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: '2024-01-15',
+        total_amount_cents: 2500,
+        status: 'completed' as ReceiptStatus,
+        raw_text: 'test text',
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      const mockReceiptItems = [
+        {
+          receipt_item_id: 1,
+          receipt_id: 1,
+          raw_item_description: 'MILK 2%',
+          quantity: 1,
+          price_paid_cents: 399,
+          master_item_id: 5,
+          product_id: null,
+          status: 'matched' as ReceiptItemStatus,
+          line_number: 1,
+          match_confidence: 0.95,
+          is_discount: false,
+          unit_price_cents: null,
+          unit_type: null,
+          added_to_pantry: false,
+          pantry_item_id: null,
+          upc_code: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptRepo.getReceiptItems).mockResolvedValueOnce(mockReceiptItems);
+      vi.mocked(expiryRepo.addInventoryItem).mockResolvedValueOnce(
+        createMockInventoryItem({ inventory_id: 10 }),
+      );
+      vi.mocked(receiptRepo.updateReceiptItem).mockResolvedValueOnce(mockReceiptItems[0] as any);
+
+      const result = await addItemsFromReceipt(
+        'user-1',
+        1,
+        [{ receipt_item_id: 1, location: 'fridge', include: true }],
+        mockLogger,
+      );
+
+      expect(result).toHaveLength(1);
+      expect(receiptRepo.updateReceiptItem).toHaveBeenCalledWith(
+        1,
+        expect.objectContaining({ added_to_pantry: true }),
+        expect.any(Object),
+      );
+    });
+
+    it('should skip items with include: false', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: '2024-01-15',
+        total_amount_cents: 2500,
+        status: 'completed' as ReceiptStatus,
+        raw_text: 'test text',
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+
+      const result = await addItemsFromReceipt(
+        'user-1',
+        1,
+        [{ receipt_item_id: 1, include: false }],
+        mockLogger,
+      );
+
+      expect(result).toHaveLength(0);
+      expect(expiryRepo.addInventoryItem).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('getRecipeSuggestionsForExpiringItems', () => {
+    it('should return recipes using expiring items', async () => {
+      const expiringItems = [
+        createMockInventoryItem({ master_item_id: 5, days_until_expiry: 2 }),
+        createMockInventoryItem({ master_item_id: 10, days_until_expiry: 4 }),
+      ];
+
+      const mockRecipes = {
+        recipes: [
+          {
+            recipe_id: 1,
+            recipe_name: 'Quick Breakfast',
+            description: 'Easy breakfast recipe',
+            prep_time_minutes: 10,
+            cook_time_minutes: 15,
+            servings: 2,
+            photo_url: null,
+            matching_master_item_ids: [5],
+            match_count: 1,
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce(expiringItems);
+      vi.mocked(expiryRepo.getRecipesForExpiringItems).mockResolvedValueOnce(mockRecipes);
+
+      const result = await getRecipeSuggestionsForExpiringItems('user-1', 7, mockLogger);
+
+      expect(result.recipes).toHaveLength(1);
+      expect(result.recipes[0].matching_items).toHaveLength(1);
+      expect(result.considered_items).toHaveLength(2);
+    });
+
+    it('should return empty results when no expiring items', async () => {
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce([]);
+
+      const result = await getRecipeSuggestionsForExpiringItems('user-1', 7, mockLogger);
+
+      expect(result.recipes).toHaveLength(0);
+      expect(result.total).toBe(0);
+    });
+  });
+
+  describe('processExpiryAlertJob', () => {
+    it('should process user-specific alert job', async () => {
+      vi.mocked(expiryRepo.getUserAlertSettings).mockResolvedValueOnce([
+        {
+          expiry_alert_id: 1,
+          user_id: 'user-1',
+          days_before_expiry: 7,
+          alert_method: 'email' as AlertMethod,
+          is_enabled: true,
+          last_alert_sent_at: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ]);
+
+      vi.mocked(expiryRepo.getExpiringItems).mockResolvedValueOnce([
+        createMockInventoryItem({ days_until_expiry: 3 }),
+      ]);
+
+      vi.mocked(expiryRepo.logAlert).mockResolvedValue(createMockAlertLogRecord());
+      vi.mocked(expiryRepo.upsertAlertSettings).mockResolvedValue({
+        expiry_alert_id: 1,
+        user_id: 'user-1',
+        days_before_expiry: 7,
+        alert_method: 'email' as AlertMethod,
+        is_enabled: true,
+        last_alert_sent_at: new Date().toISOString(),
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const mockJob = {
+        id: 'job-1',
+        data: {
+          alertType: 'user_specific' as const,
+          userId: 'user-1',
+          daysAhead: 7,
+          meta: { requestId: 'req-1' },
+        },
+      } as Job<ExpiryAlertJobData>;
+
+      const result = await processExpiryAlertJob(mockJob, mockLogger);
+
+      expect(result.success).toBe(true);
+      expect(result.alertsSent).toBe(1);
+      expect(result.usersNotified).toBe(1);
+    });
+
+    it('should process daily check job for all users', async () => {
+      vi.mocked(expiryRepo.getUsersWithExpiringItems).mockResolvedValueOnce([
+        {
+          user_id: 'user-1',
+          email: 'user1@example.com',
+          alert_method: 'email' as AlertMethod,
+          days_before_expiry: 7,
+        },
+        {
+          user_id: 'user-2',
+          email: 'user2@example.com',
+          alert_method: 'email' as AlertMethod,
+          days_before_expiry: 7,
+        },
+      ]);
+
+      vi.mocked(expiryRepo.getUserAlertSettings)
+        .mockResolvedValueOnce([
+          {
+            expiry_alert_id: 1,
+            user_id: 'user-1',
+            days_before_expiry: 7,
+            alert_method: 'email' as AlertMethod,
+            is_enabled: true,
+            last_alert_sent_at: null,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ])
+        .mockResolvedValueOnce([
+          {
+            expiry_alert_id: 2,
+            user_id: 'user-2',
+            days_before_expiry: 7,
+            alert_method: 'email' as AlertMethod,
+            is_enabled: true,
+            last_alert_sent_at: null,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ]);
+
+      vi.mocked(expiryRepo.getExpiringItems)
+        .mockResolvedValueOnce([createMockInventoryItem({ days_until_expiry: 3 })])
+        .mockResolvedValueOnce([createMockInventoryItem({ days_until_expiry: 5 })]);
+
+      vi.mocked(expiryRepo.logAlert).mockResolvedValue(createMockAlertLogRecord());
+      vi.mocked(expiryRepo.upsertAlertSettings).mockResolvedValue({
+        expiry_alert_id: 1,
+        user_id: 'user-1',
+        days_before_expiry: 7,
+        alert_method: 'email' as AlertMethod,
+        is_enabled: true,
+        last_alert_sent_at: new Date().toISOString(),
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const mockJob = {
+        id: 'job-2',
+        data: {
+          alertType: 'daily_check' as const,
+          daysAhead: 7,
+        },
+      } as Job<ExpiryAlertJobData>;
+
+      const result = await processExpiryAlertJob(mockJob, mockLogger);
+
+      expect(result.success).toBe(true);
+      expect(result.usersNotified).toBe(2);
+    });
+
+    it('should handle job processing errors', async () => {
+      vi.mocked(expiryRepo.getUserAlertSettings).mockRejectedValueOnce(new Error('DB error'));
+
+      const mockJob = {
+        id: 'job-3',
+        data: {
+          alertType: 'user_specific' as const,
+          userId: 'user-1',
+        },
+      } as Job<ExpiryAlertJobData>;
+
+      await expect(processExpiryAlertJob(mockJob, mockLogger)).rejects.toThrow('DB error');
+    });
+  });
+});
+
+// Helper function to create mock inventory items
+function createMockInventoryItem(
+  overrides: Partial<{
+    inventory_id: number;
+    master_item_id: number | null;
+    days_until_expiry: number | null;
+  }>,
+): UserInventoryItem {
+  const daysUntilExpiry = overrides.days_until_expiry ?? 5;
+  const expiryStatus: ExpiryStatus =
+    daysUntilExpiry !== null && daysUntilExpiry < 0
+      ? 'expired'
+      : daysUntilExpiry !== null && daysUntilExpiry <= 7
+        ? 'expiring_soon'
+        : 'fresh';
+  return {
+    inventory_id: overrides.inventory_id ?? 1,
+    user_id: 'user-1',
+    product_id: null,
+    master_item_id: overrides.master_item_id ?? null,
+    item_name: 'Test Item',
+    quantity: 1,
+    unit: null,
+    purchase_date: null,
+    expiry_date: '2024-01-25',
+    source: 'manual' as InventorySource,
+    location: 'fridge' as StorageLocation,
+    notes: null,
+    is_consumed: false,
+    consumed_at: null,
+    expiry_source: null,
+    receipt_item_id: null,
+    pantry_location_id: null,
+    notification_sent_at: null,
+    created_at: new Date().toISOString(),
+    updated_at: new Date().toISOString(),
+    days_until_expiry: daysUntilExpiry,
+    expiry_status: expiryStatus,
+  };
+}
--- a/src/services/expiryService.server.ts
+++ b/src/services/expiryService.server.ts
@@ -0,0 +1,955 @@
+// src/services/expiryService.server.ts
+/**
+ * @file Expiry Date Tracking Service
+ * Handles inventory management, expiry date calculations, and expiry alerts.
+ * Provides functionality for tracking food items and notifying users about expiring items.
+ */
+import type { Logger } from 'pino';
+import { expiryRepo, receiptRepo } from './db/index.db';
+import type {
+  StorageLocation,
+  AlertMethod,
+  UserInventoryItem,
+  AddInventoryItemRequest,
+  UpdateInventoryItemRequest,
+  ExpiryDateRange,
+  AddExpiryRangeRequest,
+  ExpiryAlertSettings,
+  UpdateExpiryAlertSettingsRequest,
+  ExpiringItemsResponse,
+  InventoryQueryOptions,
+  ExpiryRangeQueryOptions,
+  CalculateExpiryOptions,
+} from '../types/expiry';
+
+/**
+ * Default expiry warning threshold in days
+ */
+const DEFAULT_EXPIRY_WARNING_DAYS = 7;
+
+/**
+ * Number of days to consider an item "expiring soon"
+ */
+const EXPIRING_SOON_THRESHOLD = 7;
+
+/**
+ * Number of days to consider for "this month" expiry grouping
+ */
+const THIS_MONTH_THRESHOLD = 30;
+
+// ============================================================================
+// INVENTORY MANAGEMENT
+// ============================================================================
+
+/**
+ * Adds an item to the user's inventory.
+ * If no expiry date is provided, attempts to calculate one based on storage location.
+ * @param userId The user's ID
+ * @param item The item to add
+ * @param logger Pino logger instance
+ * @returns The created inventory item with computed expiry status
+ */
+export const addInventoryItem = async (
+  userId: string,
+  item: AddInventoryItemRequest,
+  logger: Logger,
+): Promise<UserInventoryItem> => {
+  const itemLogger = logger.child({ userId, itemName: item.item_name });
+  itemLogger.info('Adding item to inventory');
+
+  // If no expiry date provided and we have purchase date + location, try to calculate
+  if (!item.expiry_date && item.purchase_date && item.location) {
+    const calculatedExpiry = await calculateExpiryDate(
+      {
+        master_item_id: item.master_item_id,
+        item_name: item.item_name,
+        storage_location: item.location,
+        purchase_date: item.purchase_date,
+      },
+      itemLogger,
+    );
+
+    if (calculatedExpiry) {
+      itemLogger.debug({ calculatedExpiry }, 'Calculated expiry date from storage location');
+      item.expiry_date = calculatedExpiry;
+    }
+  }
+
+  const inventoryItem = await expiryRepo.addInventoryItem(userId, item, itemLogger);
+  itemLogger.info({ inventoryId: inventoryItem.inventory_id }, 'Item added to inventory');
+
+  return inventoryItem;
+};
+
+/**
+ * Updates an existing inventory item.
+ * @param inventoryId The inventory item ID
+ * @param userId The user's ID (for authorization)
+ * @param updates The updates to apply
+ * @param logger Pino logger instance
+ * @returns The updated inventory item
+ */
+export const updateInventoryItem = async (
+  inventoryId: number,
+  userId: string,
+  updates: UpdateInventoryItemRequest,
+  logger: Logger,
+): Promise<UserInventoryItem> => {
+  logger.debug({ inventoryId, userId, updates }, 'Updating inventory item');
+  return expiryRepo.updateInventoryItem(inventoryId, userId, updates, logger);
+};
+
+/**
+ * Marks an inventory item as consumed.
+ * @param inventoryId The inventory item ID
+ * @param userId The user's ID (for authorization)
+ * @param logger Pino logger instance
+ */
+export const markItemConsumed = async (
+  inventoryId: number,
+  userId: string,
+  logger: Logger,
+): Promise<void> => {
+  logger.debug({ inventoryId, userId }, 'Marking item as consumed');
+  await expiryRepo.markAsConsumed(inventoryId, userId, logger);
+  logger.info({ inventoryId }, 'Item marked as consumed');
+};
+
+/**
+ * Deletes an inventory item.
+ * @param inventoryId The inventory item ID
+ * @param userId The user's ID (for authorization)
+ * @param logger Pino logger instance
+ */
+export const deleteInventoryItem = async (
+  inventoryId: number,
+  userId: string,
+  logger: Logger,
+): Promise<void> => {
+  logger.debug({ inventoryId, userId }, 'Deleting inventory item');
+  await expiryRepo.deleteInventoryItem(inventoryId, userId, logger);
+  logger.info({ inventoryId }, 'Item deleted from inventory');
+};
+
+/**
+ * Gets a single inventory item by ID.
+ * @param inventoryId The inventory item ID
+ * @param userId The user's ID (for authorization)
+ * @param logger Pino logger instance
+ * @returns The inventory item
+ */
+export const getInventoryItemById = async (
+  inventoryId: number,
+  userId: string,
+  logger: Logger,
+): Promise<UserInventoryItem> => {
+  return expiryRepo.getInventoryItemById(inventoryId, userId, logger);
+};
+
+/**
+ * Gets the user's inventory with optional filtering and pagination.
+ * @param options Query options
+ * @param logger Pino logger instance
+ * @returns Paginated inventory items
+ */
+export const getInventory = async (
+  options: InventoryQueryOptions,
+  logger: Logger,
+): Promise<{ items: UserInventoryItem[]; total: number }> => {
+  logger.debug({ userId: options.user_id }, 'Fetching user inventory');
+  return expiryRepo.getInventory(options, logger);
+};
+
+// ============================================================================
+// EXPIRING ITEMS
+// ============================================================================
+
+/**
+ * Gets items grouped by expiry urgency for dashboard display.
+ * @param userId The user's ID
+ * @param logger Pino logger instance
+ * @returns Items grouped by expiry status with counts
+ */
+export const getExpiringItemsGrouped = async (
+  userId: string,
+  logger: Logger,
+): Promise<ExpiringItemsResponse> => {
+  logger.debug({ userId }, 'Fetching expiring items grouped by urgency');
+
+  // Get all expiring items within 30 days + expired items
+  const expiringThisMonth = await expiryRepo.getExpiringItems(userId, THIS_MONTH_THRESHOLD, logger);
+  const expiredItems = await expiryRepo.getExpiredItems(userId, logger);
+
+  // Group items by urgency
+  const today = new Date();
+  today.setHours(0, 0, 0, 0);
+
+  const expiringToday: UserInventoryItem[] = [];
+  const expiringThisWeek: UserInventoryItem[] = [];
+  const expiringLater: UserInventoryItem[] = [];
+
+  for (const item of expiringThisMonth) {
+    if (item.days_until_expiry === null) {
+      continue;
+    }
+
+    if (item.days_until_expiry === 0) {
+      expiringToday.push(item);
+    } else if (item.days_until_expiry <= EXPIRING_SOON_THRESHOLD) {
+      expiringThisWeek.push(item);
+    } else {
+      expiringLater.push(item);
+    }
+  }
+
+  const response: ExpiringItemsResponse = {
+    expiring_today: expiringToday,
+    expiring_this_week: expiringThisWeek,
+    expiring_this_month: expiringLater,
+    already_expired: expiredItems,
+    counts: {
+      today: expiringToday.length,
+      this_week: expiringThisWeek.length,
+      this_month: expiringLater.length,
+      expired: expiredItems.length,
+      total:
+        expiringToday.length + expiringThisWeek.length + expiringLater.length + expiredItems.length,
+    },
+  };
+
+  logger.info(
+    {
+      userId,
+      counts: response.counts,
+    },
+    'Expiring items fetched',
+  );
+
+  return response;
+};
+
+/**
+ * Gets items expiring within a specified number of days.
+ * @param userId The user's ID
+ * @param daysAhead Number of days to look ahead
+ * @param logger Pino logger instance
+ * @returns Items expiring within the specified timeframe
+ */
+export const getExpiringItems = async (
+  userId: string,
+  daysAhead: number,
+  logger: Logger,
+): Promise<UserInventoryItem[]> => {
+  logger.debug({ userId, daysAhead }, 'Fetching expiring items');
+  return expiryRepo.getExpiringItems(userId, daysAhead, logger);
+};
+
+/**
+ * Gets items that have already expired.
+ * @param userId The user's ID
+ * @param logger Pino logger instance
+ * @returns Expired items
+ */
+export const getExpiredItems = async (
+  userId: string,
+  logger: Logger,
+): Promise<UserInventoryItem[]> => {
+  logger.debug({ userId }, 'Fetching expired items');
+  return expiryRepo.getExpiredItems(userId, logger);
+};
+
+// ============================================================================
+// EXPIRY DATE CALCULATION
+// ============================================================================
+
+/**
+ * Calculates an estimated expiry date based on item and storage location.
+ * Uses expiry_date_ranges table for reference data.
+ * @param options Calculation options
+ * @param logger Pino logger instance
+ * @returns Calculated expiry date string (ISO format) or null if unable to calculate
+ */
+export const calculateExpiryDate = async (
+  options: CalculateExpiryOptions,
+  logger: Logger,
+): Promise<string | null> => {
+  const { master_item_id, category_id, item_name, storage_location, purchase_date } = options;
+
+  logger.debug(
+    {
+      masterItemId: master_item_id,
+      categoryId: category_id,
+      itemName: item_name,
+      storageLocation: storage_location,
+    },
+    'Calculating expiry date',
+  );
+
+  // Look up expiry range for this item/category/pattern
+  const expiryRange = await expiryRepo.getExpiryRangeForItem(storage_location, logger, {
+    masterItemId: master_item_id,
+    categoryId: category_id,
+    itemName: item_name,
+  });
+
+  if (!expiryRange) {
+    logger.debug('No expiry range found for item');
+    return null;
+  }
+
+  // Calculate expiry date using typical_days
+  const purchaseDateTime = new Date(purchase_date);
+  purchaseDateTime.setDate(purchaseDateTime.getDate() + expiryRange.typical_days);
+
+  const expiryDateStr = purchaseDateTime.toISOString().split('T')[0];
+
+  logger.debug(
+    {
+      purchaseDate: purchase_date,
+      typicalDays: expiryRange.typical_days,
+      expiryDate: expiryDateStr,
+    },
+    'Expiry date calculated',
+  );
+
+  return expiryDateStr;
+};
+
+/**
+ * Gets expiry date ranges with optional filtering.
+ * @param options Query options
+ * @param logger Pino logger instance
+ * @returns Paginated expiry date ranges
+ */
+export const getExpiryRanges = async (
+  options: ExpiryRangeQueryOptions,
+  logger: Logger,
+): Promise<{ ranges: ExpiryDateRange[]; total: number }> => {
+  return expiryRepo.getExpiryRanges(options, logger);
+};
+
+/**
+ * Adds a new expiry date range (admin operation).
+ * @param range The range to add
+ * @param logger Pino logger instance
+ * @returns The created expiry range
+ */
+export const addExpiryRange = async (
+  range: AddExpiryRangeRequest,
+  logger: Logger,
+): Promise<ExpiryDateRange> => {
+  logger.info(
+    { storageLocation: range.storage_location, typicalDays: range.typical_days },
+    'Adding expiry range',
+  );
+  return expiryRepo.addExpiryRange(range, logger);
+};
+
+// ============================================================================
+// EXPIRY ALERTS
+// ============================================================================
+
+/**
+ * Gets the user's expiry alert settings.
+ * @param userId The user's ID
+ * @param logger Pino logger instance
+ * @returns Array of alert settings
+ */
+export const getAlertSettings = async (
+  userId: string,
+  logger: Logger,
+): Promise<ExpiryAlertSettings[]> => {
+  return expiryRepo.getUserAlertSettings(userId, logger);
+};
+
+/**
+ * Updates the user's expiry alert settings for a specific alert method.
+ * @param userId The user's ID
+ * @param alertMethod The alert delivery method
+ * @param settings The settings to update
+ * @param logger Pino logger instance
+ * @returns Updated alert settings
+ */
+export const updateAlertSettings = async (
+  userId: string,
+  alertMethod: AlertMethod,
+  settings: UpdateExpiryAlertSettingsRequest,
+  logger: Logger,
+): Promise<ExpiryAlertSettings> => {
+  logger.debug({ userId, alertMethod, settings }, 'Updating alert settings');
+  return expiryRepo.upsertAlertSettings(userId, alertMethod, settings, logger);
+};
+
+/**
+ * Processes expiry alerts for all users.
+ * This should be called by a scheduled worker job.
+ * @param logger Pino logger instance
+ * @returns Number of alerts sent
+ */
+export const processExpiryAlerts = async (logger: Logger): Promise<number> => {
+  logger.info('Starting expiry alert processing');
+
+  // Get all users with expiring items who have alerts enabled
+  const usersToNotify = await expiryRepo.getUsersWithExpiringItems(logger);
+  logger.debug({ userCount: usersToNotify.length }, 'Found users to notify');
+
+  let alertsSent = 0;
+
+  for (const user of usersToNotify) {
+    try {
+      // Get the expiring items for this user
+      const expiringItems = await expiryRepo.getExpiringItems(
+        user.user_id,
+        user.days_before_expiry,
+        logger,
+      );
+
+      if (expiringItems.length === 0) {
+        continue;
+      }
+
+      // Send notification based on alert method
+      switch (user.alert_method) {
+        case 'email':
+          await sendExpiryEmailAlert(user.user_id, user.email, expiringItems, logger);
+          break;
+        case 'push':
+          // TODO: Implement push notifications
+          logger.debug({ userId: user.user_id }, 'Push notifications not yet implemented');
+          break;
+        case 'in_app':
+          // TODO: Implement in-app notifications
+          logger.debug({ userId: user.user_id }, 'In-app notifications not yet implemented');
+          break;
+      }
+
+      // Log the alert and mark as sent
+      for (const item of expiringItems) {
+        await expiryRepo.logAlert(
+          user.user_id,
+          'expiring_soon',
+          user.alert_method,
+          item.item_name,
+          logger,
+          {
+            pantryItemId: item.inventory_id,
+            expiryDate: item.expiry_date,
+            daysUntilExpiry: item.days_until_expiry,
+          },
+        );
+      }
+
+      await expiryRepo.markAlertSent(user.user_id, user.alert_method, logger);
+      alertsSent++;
+    } catch (error) {
+      const err = error instanceof Error ? error : new Error(String(error));
+      logger.error({ err, userId: user.user_id }, 'Error processing expiry alert for user');
+    }
+  }
+
+  logger.info({ alertsSent }, 'Expiry alert processing completed');
+  return alertsSent;
+};
+
+/**
+ * Sends an email alert about expiring items.
+ * @param userId The user's ID
+ * @param email The user's email
+ * @param items The expiring items
+ * @param logger Pino logger instance
+ */
+const sendExpiryEmailAlert = async (
+  userId: string,
+  email: string,
+  items: UserInventoryItem[],
+  logger: Logger,
+): Promise<void> => {
+  const alertLogger = logger.child({ userId, email, itemCount: items.length });
+  alertLogger.info('Sending expiry alert email');
+
+  // Group items by urgency
+  const expiredItems = items.filter((i) => i.days_until_expiry !== null && i.days_until_expiry < 0);
+  const todayItems = items.filter((i) => i.days_until_expiry === 0);
+  const soonItems = items.filter(
+    (i) => i.days_until_expiry !== null && i.days_until_expiry > 0 && i.days_until_expiry <= 3,
+  );
+  const laterItems = items.filter((i) => i.days_until_expiry !== null && i.days_until_expiry > 3);
+
+  // Build the email content
+  const subject =
+    todayItems.length > 0 || expiredItems.length > 0
+      ? '⚠️ Food Items Expiring Today or Already Expired!'
+      : `🕐 ${items.length} Food Item${items.length > 1 ? 's' : ''} Expiring Soon`;
+
+  const buildItemList = (itemList: UserInventoryItem[], emoji: string): string => {
+    if (itemList.length === 0) return '';
+    return itemList
+      .map((item) => {
+        const daysText =
+          item.days_until_expiry === 0
+            ? 'today'
+            : item.days_until_expiry === 1
+              ? 'tomorrow'
+              : item.days_until_expiry !== null && item.days_until_expiry < 0
+                ? `${Math.abs(item.days_until_expiry)} day${Math.abs(item.days_until_expiry) > 1 ? 's' : ''} ago`
+                : `in ${item.days_until_expiry} days`;
+        const location = item.location ? ` (${item.location})` : '';
+        return `${emoji} <strong>${item.item_name}</strong>${location} - expires ${daysText}`;
+      })
+      .join('<br>');
+  };
+
+  let htmlBody = '';
+
+  if (expiredItems.length > 0) {
+    htmlBody += `<h3 style="color: #dc3545;">Already Expired (${expiredItems.length})</h3>
+      <p>${buildItemList(expiredItems, '❌')}</p>`;
+  }
+
+  if (todayItems.length > 0) {
+    htmlBody += `<h3 style="color: #fd7e14;">Expiring Today (${todayItems.length})</h3>
+      <p>${buildItemList(todayItems, '⚠️')}</p>`;
+  }
+
+  if (soonItems.length > 0) {
+    htmlBody += `<h3 style="color: #ffc107;">Expiring Within 3 Days (${soonItems.length})</h3>
+      <p>${buildItemList(soonItems, '🕐')}</p>`;
+  }
+
+  if (laterItems.length > 0) {
+    htmlBody += `<h3 style="color: #28a745;">Expiring This Week (${laterItems.length})</h3>
+      <p>${buildItemList(laterItems, '📅')}</p>`;
+  }
+
+  const html = `
+    <div style="font-family: sans-serif; padding: 20px; max-width: 600px;">
+      <h2 style="color: #333;">Food Expiry Alert</h2>
+      <p>The following items in your pantry need attention:</p>
+      ${htmlBody}
+      <hr style="margin: 20px 0; border: none; border-top: 1px solid #eee;">
+      <p style="color: #666; font-size: 14px;">
+        Visit your <a href="${process.env.FRONTEND_URL || 'https://flyer-crawler.projectium.com'}/inventory">inventory page</a>
+        to manage these items. You can also find
+        <a href="${process.env.FRONTEND_URL || 'https://flyer-crawler.projectium.com'}/recipes/suggestions">recipe suggestions</a>
+        to use them before they expire!
+      </p>
+      <p style="color: #999; font-size: 12px;">
+        To manage your alert preferences, visit your <a href="${process.env.FRONTEND_URL || 'https://flyer-crawler.projectium.com'}/settings">settings page</a>.
+      </p>
+    </div>
+  `;
+
+  // Build plain text version
+  const buildTextList = (itemList: UserInventoryItem[]): string => {
+    return itemList
+      .map((item) => {
+        const daysText =
+          item.days_until_expiry === 0
+            ? 'today'
+            : item.days_until_expiry === 1
+              ? 'tomorrow'
+              : item.days_until_expiry !== null && item.days_until_expiry < 0
+                ? `${Math.abs(item.days_until_expiry)} day(s) ago`
+                : `in ${item.days_until_expiry} days`;
+        return `  - ${item.item_name} - expires ${daysText}`;
+      })
+      .join('\n');
+  };
+
+  let textBody = 'Food Expiry Alert\n\nThe following items need attention:\n\n';
+  if (expiredItems.length > 0) {
+    textBody += `Already Expired:\n${buildTextList(expiredItems)}\n\n`;
+  }
+  if (todayItems.length > 0) {
+    textBody += `Expiring Today:\n${buildTextList(todayItems)}\n\n`;
+  }
+  if (soonItems.length > 0) {
+    textBody += `Expiring Within 3 Days:\n${buildTextList(soonItems)}\n\n`;
+  }
+  if (laterItems.length > 0) {
+    textBody += `Expiring This Week:\n${buildTextList(laterItems)}\n\n`;
+  }
+  textBody += 'Visit your inventory page to manage these items.\n\nFlyer Crawler';
+
+  try {
+    await emailService.sendEmail(
+      {
+        to: email,
+        subject,
+        text: textBody,
+        html,
+      },
+      alertLogger,
+    );
+    alertLogger.info('Expiry alert email sent successfully');
+  } catch (error) {
+    alertLogger.error({ err: error }, 'Failed to send expiry alert email');
+    throw error;
+  }
+};
+
+// ============================================================================
+// RECEIPT INTEGRATION
+// ============================================================================
+
+/**
+ * Adds items from a confirmed receipt to the user's inventory.
+ * @param userId The user's ID
+ * @param receiptId The receipt ID
+ * @param itemConfirmations Array of item confirmations with storage locations
+ * @param logger Pino logger instance
+ * @returns Array of created inventory items
+ */
+export const addItemsFromReceipt = async (
+  userId: string,
+  receiptId: number,
+  itemConfirmations: Array<{
+    receipt_item_id: number;
+    item_name?: string;
+    quantity?: number;
+    location?: StorageLocation;
+    expiry_date?: string;
+    include: boolean;
+  }>,
+  logger: Logger,
+): Promise<UserInventoryItem[]> => {
+  const receiptLogger = logger.child({ userId, receiptId });
+  receiptLogger.info(
+    { itemCount: itemConfirmations.length },
+    'Adding items from receipt to inventory',
+  );
+
+  const createdItems: UserInventoryItem[] = [];
+
+  // Get receipt details for purchase date
+  const receipt = await receiptRepo.getReceiptById(receiptId, userId, receiptLogger);
+
+  for (const confirmation of itemConfirmations) {
+    if (!confirmation.include) {
+      receiptLogger.debug(
+        { receiptItemId: confirmation.receipt_item_id },
+        'Skipping excluded item',
+      );
+      continue;
+    }
+
+    try {
+      // Get the receipt item details
+      const receiptItems = await receiptRepo.getReceiptItems(receiptId, receiptLogger);
+      const receiptItem = receiptItems.find(
+        (ri) => ri.receipt_item_id === confirmation.receipt_item_id,
+      );
+
+      if (!receiptItem) {
+        receiptLogger.warn(
+          { receiptItemId: confirmation.receipt_item_id },
+          'Receipt item not found',
+        );
+        continue;
+      }
+
+      // Create inventory item
+      const inventoryItem = await addInventoryItem(
+        userId,
+        {
+          product_id: receiptItem.product_id ?? undefined,
+          master_item_id: receiptItem.master_item_id ?? undefined,
+          item_name: confirmation.item_name || receiptItem.raw_item_description,
+          quantity: confirmation.quantity || receiptItem.quantity,
+          purchase_date: receipt.transaction_date || receipt.created_at.split('T')[0],
+          expiry_date: confirmation.expiry_date,
+          source: 'receipt_scan',
+          location: confirmation.location,
+        },
+        receiptLogger,
+      );
+
+      // Update receipt item to mark as added to pantry
+      await receiptRepo.updateReceiptItem(
+        confirmation.receipt_item_id,
+        {
+          added_to_pantry: true,
+          pantry_item_id: inventoryItem.inventory_id,
+        },
+        receiptLogger,
+      );
+
+      createdItems.push(inventoryItem);
+    } catch (error) {
+      const err = error instanceof Error ? error : new Error(String(error));
+      receiptLogger.error(
+        { err, receiptItemId: confirmation.receipt_item_id },
+        'Error adding receipt item to inventory',
+      );
+    }
+  }
+
+  receiptLogger.info({ createdCount: createdItems.length }, 'Items added from receipt');
+  return createdItems;
+};
+
+/**
+ * Gets recipe suggestions based on expiring items.
+ * Prioritizes recipes that use items closest to expiry.
+ * @param userId The user's ID
+ * @param daysAhead Number of days to look ahead for expiring items
+ * @param logger Pino logger instance
+ * @param options Pagination options
+ * @returns Recipes with matching expiring ingredients
+ */
+export const getRecipeSuggestionsForExpiringItems = async (
+  userId: string,
+  daysAhead: number,
+  logger: Logger,
+  options: { limit?: number; offset?: number } = {},
+): Promise<{
+  recipes: Array<{
+    recipe_id: number;
+    recipe_name: string;
+    description: string | null;
+    prep_time_minutes: number | null;
+    cook_time_minutes: number | null;
+    servings: number | null;
+    photo_url: string | null;
+    matching_items: UserInventoryItem[];
+    match_count: number;
+  }>;
+  total: number;
+  considered_items: UserInventoryItem[];
+}> => {
+  const { limit = 10, offset = 0 } = options;
+  const suggestionLogger = logger.child({ userId, daysAhead });
+  suggestionLogger.debug('Fetching recipe suggestions for expiring items');
+
+  // Get expiring items to include in the response
+  const expiringItems = await getExpiringItems(userId, daysAhead, logger);
+
+  if (expiringItems.length === 0) {
+    suggestionLogger.debug('No expiring items found, returning empty suggestions');
+    return {
+      recipes: [],
+      total: 0,
+      considered_items: [],
+    };
+  }
+
+  // Get recipes that use the expiring items
+  const recipeData = await expiryRepo.getRecipesForExpiringItems(
+    userId,
+    daysAhead,
+    limit,
+    offset,
+    suggestionLogger,
+  );
+
+  // Map the expiring items by master_item_id for quick lookup
+  const itemsByMasterId = new Map<number, UserInventoryItem>();
+  for (const item of expiringItems) {
+    if (item.master_item_id && !itemsByMasterId.has(item.master_item_id)) {
+      itemsByMasterId.set(item.master_item_id, item);
+    }
+  }
+
+  // Build the response with matching items
+  const recipes = recipeData.recipes.map((recipe) => ({
+    recipe_id: recipe.recipe_id,
+    recipe_name: recipe.recipe_name,
+    description: recipe.description,
+    prep_time_minutes: recipe.prep_time_minutes,
+    cook_time_minutes: recipe.cook_time_minutes,
+    servings: recipe.servings,
+    photo_url: recipe.photo_url,
+    matching_items: recipe.matching_master_item_ids
+      .map((id) => itemsByMasterId.get(id))
+      .filter((item): item is UserInventoryItem => item !== undefined),
+    match_count: recipe.match_count,
+  }));
+
+  suggestionLogger.info(
+    {
+      recipeCount: recipes.length,
+      total: recipeData.total,
+      expiringItemCount: expiringItems.length,
+    },
+    'Recipe suggestions fetched for expiring items',
+  );
+
+  return {
+    recipes,
+    total: recipeData.total,
+    considered_items: expiringItems,
+  };
+};
+
+// ============================================================================
+// JOB PROCESSING
+// ============================================================================
+
+import type { Job } from 'bullmq';
+import type { ExpiryAlertJobData } from '../types/job-data';
+import * as emailService from './emailService.server';
+
+/**
+ * Processes an expiry alert job from the queue.
+ * This is the main entry point for background expiry alert processing.
+ * @param job The BullMQ job
+ * @param logger Pino logger instance
+ * @returns Processing result with counts of alerts sent
+ */
+export const processExpiryAlertJob = async (
+  job: Job<ExpiryAlertJobData>,
+  logger: Logger,
+): Promise<{ success: boolean; alertsSent: number; usersNotified: number }> => {
+  const {
+    alertType,
+    userId,
+    daysAhead = DEFAULT_EXPIRY_WARNING_DAYS,
+    scheduledAt: _scheduledAt,
+  } = job.data;
+  const jobLogger = logger.child({
+    jobId: job.id,
+    alertType,
+    userId,
+    daysAhead,
+    requestId: job.data.meta?.requestId,
+  });
+
+  jobLogger.info('Starting expiry alert job');
+
+  try {
+    let alertsSent = 0;
+    let usersNotified = 0;
+
+    if (alertType === 'user_specific' && userId) {
+      // Process alerts for a single user
+      const result = await processUserExpiryAlerts(userId, daysAhead, jobLogger);
+      alertsSent = result.alertsSent;
+      usersNotified = result.alertsSent > 0 ? 1 : 0;
+    } else if (alertType === 'daily_check') {
+      // Process daily alerts for all users with expiring items
+      const result = await processDailyExpiryAlerts(daysAhead, jobLogger);
+      alertsSent = result.totalAlerts;
+      usersNotified = result.usersNotified;
+    }
+
+    jobLogger.info({ alertsSent, usersNotified }, 'Expiry alert job completed');
+
+    return { success: true, alertsSent, usersNotified };
+  } catch (error) {
+    jobLogger.error({ err: error }, 'Expiry alert job failed');
+    throw error;
+  }
+};
+
+/**
+ * Processes expiry alerts for a single user.
+ * @param userId The user's ID
+ * @param daysAhead Days ahead to check for expiring items
+ * @param logger Pino logger instance
+ * @returns Number of alerts sent
+ */
+const processUserExpiryAlerts = async (
+  userId: string,
+  daysAhead: number,
+  logger: Logger,
+): Promise<{ alertsSent: number }> => {
+  const userLogger = logger.child({ userId });
+
+  // Get user's alert settings
+  const settings = await expiryRepo.getUserAlertSettings(userId, userLogger);
+  const enabledSettings = settings.filter((s) => s.is_enabled);
+
+  if (enabledSettings.length === 0) {
+    userLogger.debug('No enabled alert settings for user');
+    return { alertsSent: 0 };
+  }
+
+  // Get expiring items
+  const expiringItems = await getExpiringItems(userId, daysAhead, userLogger);
+
+  if (expiringItems.length === 0) {
+    userLogger.debug('No expiring items for user');
+    return { alertsSent: 0 };
+  }
+
+  let alertsSent = 0;
+
+  // Group items by urgency for the alert (kept for future use in alert formatting)
+  const _expiredItems = expiringItems.filter((i) => i.expiry_status === 'expired');
+  const _soonItems = expiringItems.filter((i) => i.expiry_status === 'expiring_soon');
+
+  // Check if we should send alerts based on settings
+  for (const setting of enabledSettings) {
+    const relevantItems = expiringItems.filter(
+      (item) =>
+        item.days_until_expiry !== null && item.days_until_expiry <= setting.days_before_expiry,
+    );
+
+    if (relevantItems.length > 0) {
+      // Log the alert
+      for (const item of relevantItems) {
+        const alertType: ExpiryAlertType =
+          item.expiry_status === 'expired' ? 'expired' : 'expiring_soon';
+        await expiryRepo.logAlert(
+          userId,
+          alertType,
+          setting.alert_method,
+          item.item_name,
+          userLogger,
+          {
+            pantryItemId: item.inventory_id,
+            expiryDate: item.expiry_date || null,
+            daysUntilExpiry: item.days_until_expiry,
+          },
+        );
+        alertsSent++;
+      }
+
+      // Update last alert sent time via upsert
+      await expiryRepo.upsertAlertSettings(userId, setting.alert_method, {}, userLogger);
+    }
+  }
+
+  userLogger.info({ alertsSent, itemCount: expiringItems.length }, 'Processed user expiry alerts');
+  return { alertsSent };
+};
+
+/**
+ * Processes daily expiry alerts for all users.
+ * @param daysAhead Days ahead to check for expiring items
+ * @param logger Pino logger instance
+ * @returns Total alerts and users notified
+ */
+const processDailyExpiryAlerts = async (
+  daysAhead: number,
+  logger: Logger,
+): Promise<{ totalAlerts: number; usersNotified: number }> => {
+  // Get all users with items expiring within the threshold
+  const usersWithExpiringItems = await expiryRepo.getUsersWithExpiringItems(logger);
+
+  // Get unique user IDs
+  const uniqueUserIds = [...new Set(usersWithExpiringItems.map((u) => u.user_id))];
+
+  let totalAlerts = 0;
+  let usersNotified = 0;
+
+  for (const userId of uniqueUserIds) {
+    try {
+      const result = await processUserExpiryAlerts(userId, daysAhead, logger);
+      totalAlerts += result.alertsSent;
+      if (result.alertsSent > 0) {
+        usersNotified++;
+      }
+    } catch (error) {
+      logger.error({ err: error, userId }, 'Failed to process alerts for user');
+      // Continue with other users
+    }
+  }
+
+  logger.info(
+    { totalAlerts, usersNotified, totalUsers: uniqueUserIds.length },
+    'Daily expiry alert processing complete',
+  );
+
+  return { totalAlerts, usersNotified };
+};
--- a/src/services/flyerProcessingService.server.ts
+++ b/src/services/flyerProcessingService.server.ts
@@ -13,10 +13,12 @@ import {
  AiDataValidationError,
 } from './processingErrors';
 import { NotFoundError } from './db/errors.db';
-import { logger as globalLogger } from './logger.server'; // This was a duplicate, fixed.
+import { createScopedLogger } from './logger.server';
 import { generateFlyerIcon } from '../utils/imageProcessor';
 import type { FlyerPersistenceService } from './flyerPersistenceService.server';

+const globalLogger = createScopedLogger('flyer-processing-service');
+
 // Define ProcessingStage locally as it's not exported from the types file.
 export type ProcessingStage = {
  name: string;
@@ -75,8 +77,20 @@ export class FlyerProcessingService {
   * @returns An object containing the ID of the newly created flyer.
   */
  async processJob(job: Job<FlyerJobData>): Promise<{ flyerId: number }> {
+    // Extract context metadata (ADR-051) for request tracing
+    const { meta, ...jobDataWithoutMeta } = job.data;
+
    // Create a logger instance with job-specific context for better traceability.
-    const logger = globalLogger.child({ jobId: job.id, jobName: job.name, ...job.data });
+    // Uses request_id from the original API request if available (ADR-051).
+    const logger = globalLogger.child({
+      jobId: job.id,
+      jobName: job.name,
+      request_id: meta?.requestId, // Propagate original request ID
+      user_id: meta?.userId,
+      origin: meta?.origin || 'unknown',
+      service: 'flyer-worker',
+      ...jobDataWithoutMeta,
+    });
    logger.info('Picked up flyer processing job.');

    const stages: ProcessingStage[] = [
--- a/src/services/logger.server.ts
+++ b/src/services/logger.server.ts
@@ -41,3 +41,15 @@ export const logger = pino({
    censor: '[REDACTED]',
  },
 });
+
+const debugModules = (process.env.DEBUG_MODULES || '').split(',').map((s) => s.trim());
+
+export const createScopedLogger = (moduleName: string) => {
+  // If DEBUG_MODULES contains "ai-service" or "*", force level to 'debug'
+  const isDebugEnabled = debugModules.includes('*') || debugModules.includes(moduleName);
+
+  return logger.child({
+    module: moduleName,
+    level: isDebugEnabled ? 'debug' : logger.level,
+  });
+};
--- a/src/services/monitoringService.server.ts
+++ b/src/services/monitoringService.server.ts
@@ -5,13 +5,15 @@ import {
  analyticsQueue,
  cleanupQueue,
  weeklyAnalyticsQueue,
-} from './queueService.server';
+  tokenCleanupQueue,
+} from './queues.server';
 import {
  analyticsWorker,
  cleanupWorker,
  emailWorker,
  flyerWorker,
  weeklyAnalyticsWorker,
+  tokenCleanupWorker,
  flyerProcessingService,
 } from './workers.server';
 import type { Queue } from 'bullmq';
@@ -35,6 +37,7 @@ class MonitoringService {
      analyticsWorker,
      cleanupWorker,
      weeklyAnalyticsWorker,
+      tokenCleanupWorker,
    ];
    return Promise.all(
      workers.map(async (worker) => ({
@@ -49,7 +52,14 @@ class MonitoringService {
   * @returns A promise that resolves to an array of queue statuses.
   */
  async getQueueStatuses() {
-    const queues = [flyerQueue, emailQueue, analyticsQueue, cleanupQueue, weeklyAnalyticsQueue];
+    const queues = [
+      flyerQueue,
+      emailQueue,
+      analyticsQueue,
+      cleanupQueue,
+      weeklyAnalyticsQueue,
+      tokenCleanupQueue,
+    ];
    return Promise.all(
      queues.map(async (queue) => ({
        name: queue.name,
@@ -77,7 +87,8 @@ class MonitoringService {
      'email-sending': emailQueue,
      'analytics-reporting': analyticsQueue,
      'file-cleanup': cleanupQueue,
-      'weekly-analytics-reporting': weeklyAnalyticsQueue, // This was a duplicate, fixed.
+      'weekly-analytics-reporting': weeklyAnalyticsQueue,
+      'token-cleanup': tokenCleanupQueue,
    };

    const queue = queueMap[queueName];
--- a/src/services/queueService.server.ts
+++ b/src/services/queueService.server.ts
@@ -8,6 +8,9 @@ import {
  weeklyAnalyticsQueue,
  cleanupQueue,
  tokenCleanupQueue,
+  receiptQueue,
+  expiryAlertQueue,
+  barcodeQueue,
 } from './queues.server';

 // Re-export everything for backward compatibility where possible
@@ -33,6 +36,9 @@ export const gracefulShutdown = async (signal: string) => {
    { name: 'cleanupQueue', close: () => cleanupQueue.close() },
    { name: 'weeklyAnalyticsQueue', close: () => weeklyAnalyticsQueue.close() },
    { name: 'tokenCleanupQueue', close: () => tokenCleanupQueue.close() },
+    { name: 'receiptQueue', close: () => receiptQueue.close() },
+    { name: 'expiryAlertQueue', close: () => expiryAlertQueue.close() },
+    { name: 'barcodeQueue', close: () => barcodeQueue.close() },
    { name: 'redisConnection', close: () => connection.quit() },
  ];

--- a/src/services/queues.server.ts
+++ b/src/services/queues.server.ts
@@ -7,6 +7,9 @@ import type {
  WeeklyAnalyticsJobData,
  CleanupJobData,
  TokenCleanupJobData,
+  ReceiptJobData,
+  ExpiryAlertJobData,
+  BarcodeDetectionJobData,
 } from '../types/job-data';

 // --- Queues ---
@@ -46,15 +49,18 @@ export const analyticsQueue = new Queue<AnalyticsJobData>('analytics-reporting',
  },
 });

-export const weeklyAnalyticsQueue = new Queue<WeeklyAnalyticsJobData>('weekly-analytics-reporting', {
-  connection,
-  defaultJobOptions: {
-    attempts: 2,
-    backoff: { type: 'exponential', delay: 3600000 },
-    removeOnComplete: true,
-    removeOnFail: 50,
+export const weeklyAnalyticsQueue = new Queue<WeeklyAnalyticsJobData>(
+  'weekly-analytics-reporting',
+  {
+    connection,
+    defaultJobOptions: {
+      attempts: 2,
+      backoff: { type: 'exponential', delay: 3600000 },
+      removeOnComplete: true,
+      removeOnFail: 50,
+    },
  },
-});
+);

 export const cleanupQueue = new Queue<CleanupJobData>('file-cleanup', {
  connection,
@@ -73,4 +79,43 @@ export const tokenCleanupQueue = new Queue<TokenCleanupJobData>('token-cleanup',
    removeOnComplete: true,
    removeOnFail: 10,
  },
-});
+});
+
+// --- Receipt Processing Queue ---
+export const receiptQueue = new Queue<ReceiptJobData>('receipt-processing', {
+  connection,
+  defaultJobOptions: {
+    attempts: 3,
+    backoff: {
+      type: 'exponential',
+      delay: 10000, // 10 seconds initial delay
+    },
+    removeOnComplete: 100, // Keep last 100 completed jobs
+    removeOnFail: 50,
+  },
+});
+
+// --- Expiry Alert Queue ---
+export const expiryAlertQueue = new Queue<ExpiryAlertJobData>('expiry-alerts', {
+  connection,
+  defaultJobOptions: {
+    attempts: 2,
+    backoff: { type: 'exponential', delay: 300000 }, // 5 minutes
+    removeOnComplete: true,
+    removeOnFail: 20,
+  },
+});
+
+// --- Barcode Detection Queue ---
+export const barcodeQueue = new Queue<BarcodeDetectionJobData>('barcode-detection', {
+  connection,
+  defaultJobOptions: {
+    attempts: 2,
+    backoff: {
+      type: 'exponential',
+      delay: 5000,
+    },
+    removeOnComplete: 50,
+    removeOnFail: 20,
+  },
+});
--- a/src/services/receiptService.server.test.ts
+++ b/src/services/receiptService.server.test.ts
@@ -0,0 +1,791 @@
+// src/services/receiptService.server.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { Logger } from 'pino';
+import type { Job } from 'bullmq';
+import type { ReceiptJobData } from '../types/job-data';
+import { createMockLogger } from '../tests/utils/mockLogger';
+import type {
+  ReceiptStatus,
+  ReceiptItemStatus,
+  ReceiptProcessingStep,
+  ReceiptProcessingStatus,
+  OcrProvider,
+  ReceiptProcessingLogRecord,
+} from '../types/expiry';
+
+// Mock dependencies
+vi.mock('./db/index.db', () => ({
+  receiptRepo: {
+    createReceipt: vi.fn(),
+    getReceiptById: vi.fn(),
+    getReceipts: vi.fn(),
+    updateReceipt: vi.fn(),
+    deleteReceipt: vi.fn(),
+    logProcessingStep: vi.fn(),
+    detectStoreFromText: vi.fn(),
+    addReceiptItems: vi.fn(),
+    incrementRetryCount: vi.fn(),
+    getReceiptItems: vi.fn(),
+    updateReceiptItem: vi.fn(),
+    getUnaddedReceiptItems: vi.fn(),
+    getProcessingLogs: vi.fn(),
+    getProcessingStats: vi.fn(),
+    getReceiptsNeedingProcessing: vi.fn(),
+    addStorePattern: vi.fn(),
+    getActiveStorePatterns: vi.fn(),
+  },
+}));
+
+vi.mock('../config/env', () => ({
+  isAiConfigured: false,
+  config: {
+    gemini: {
+      apiKey: undefined,
+    },
+  },
+}));
+
+vi.mock('./aiService.server', () => ({
+  aiService: {
+    extractItemsFromReceiptImage: vi.fn(),
+  },
+}));
+
+vi.mock('./logger.server', () => ({
+  logger: {
+    child: vi.fn().mockReturnThis(),
+    debug: vi.fn(),
+    info: vi.fn(),
+    warn: vi.fn(),
+    error: vi.fn(),
+  },
+}));
+
+vi.mock('node:fs/promises', () => ({
+  default: {
+    access: vi.fn(),
+  },
+}));
+
+// Import after mocks are set up
+import {
+  createReceipt,
+  getReceiptById,
+  getReceipts,
+  deleteReceipt,
+  processReceipt,
+  getReceiptItems,
+  updateReceiptItem,
+  getUnaddedItems,
+  getProcessingLogs,
+  getProcessingStats,
+  getReceiptsNeedingProcessing,
+  addStorePattern,
+  getActiveStorePatterns,
+  processReceiptJob,
+} from './receiptService.server';
+
+import { receiptRepo } from './db/index.db';
+
+// Helper to create mock processing log record
+function createMockProcessingLogRecord(
+  overrides: Partial<ReceiptProcessingLogRecord> = {},
+): ReceiptProcessingLogRecord {
+  return {
+    log_id: 1,
+    receipt_id: 1,
+    processing_step: 'upload' as ReceiptProcessingStep,
+    status: 'completed' as ReceiptProcessingStatus,
+    provider: null,
+    duration_ms: null,
+    tokens_used: null,
+    cost_cents: null,
+    input_data: null,
+    output_data: null,
+    error_message: null,
+    created_at: new Date().toISOString(),
+    ...overrides,
+  };
+}
+
+// Helper to create mock store pattern row
+interface StoreReceiptPatternRow {
+  pattern_id: number;
+  store_id: number;
+  pattern_type: string;
+  pattern_value: string;
+  priority: number;
+  is_active: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+function createMockStorePatternRow(
+  overrides: Partial<StoreReceiptPatternRow> = {},
+): StoreReceiptPatternRow {
+  return {
+    pattern_id: 1,
+    store_id: 1,
+    pattern_type: 'name',
+    pattern_value: 'WALMART',
+    priority: 0,
+    is_active: true,
+    created_at: new Date().toISOString(),
+    updated_at: new Date().toISOString(),
+    ...overrides,
+  };
+}
+
+describe('receiptService.server', () => {
+  let mockLogger: Logger;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockLogger = createMockLogger();
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe('createReceipt', () => {
+    it('should create a new receipt and log upload step', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.createReceipt).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValueOnce(
+        createMockProcessingLogRecord(),
+      );
+
+      const result = await createReceipt('user-1', '/uploads/receipt.jpg', mockLogger);
+
+      expect(result.receipt_id).toBe(1);
+      expect(receiptRepo.createReceipt).toHaveBeenCalledWith(
+        {
+          user_id: 'user-1',
+          receipt_image_url: '/uploads/receipt.jpg',
+          store_id: undefined,
+          transaction_date: undefined,
+        },
+        mockLogger,
+      );
+      expect(receiptRepo.logProcessingStep).toHaveBeenCalledWith(
+        1,
+        'upload',
+        'completed',
+        mockLogger,
+        expect.any(Object),
+      );
+    });
+
+    it('should create receipt with optional store ID and transaction date', async () => {
+      const mockReceipt = {
+        receipt_id: 2,
+        user_id: 'user-1',
+        store_id: 5,
+        receipt_image_url: '/uploads/receipt2.jpg',
+        transaction_date: '2024-01-15',
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.createReceipt).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValueOnce(
+        createMockProcessingLogRecord(),
+      );
+
+      const result = await createReceipt('user-1', '/uploads/receipt2.jpg', mockLogger, {
+        storeId: 5,
+        transactionDate: '2024-01-15',
+      });
+
+      expect(result.store_id).toBe(5);
+      expect(result.transaction_date).toBe('2024-01-15');
+    });
+  });
+
+  describe('getReceiptById', () => {
+    it('should return receipt by ID', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+
+      const result = await getReceiptById(1, 'user-1', mockLogger);
+
+      expect(result.receipt_id).toBe(1);
+      expect(receiptRepo.getReceiptById).toHaveBeenCalledWith(1, 'user-1', mockLogger);
+    });
+  });
+
+  describe('getReceipts', () => {
+    it('should return paginated receipts for user', async () => {
+      const mockReceipts = {
+        receipts: [
+          {
+            receipt_id: 1,
+            user_id: 'user-1',
+            store_id: null,
+            receipt_image_url: '/uploads/receipt1.jpg',
+            transaction_date: null,
+            total_amount_cents: null,
+            status: 'completed' as ReceiptStatus,
+            raw_text: null,
+            store_confidence: null,
+            ocr_provider: null,
+            error_details: null,
+            retry_count: 0,
+            ocr_confidence: null,
+            currency: 'USD',
+            created_at: new Date().toISOString(),
+            processed_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(receiptRepo.getReceipts).mockResolvedValueOnce(mockReceipts);
+
+      const result = await getReceipts({ user_id: 'user-1', limit: 10, offset: 0 }, mockLogger);
+
+      expect(result.receipts).toHaveLength(1);
+      expect(result.total).toBe(1);
+    });
+
+    it('should filter by status', async () => {
+      vi.mocked(receiptRepo.getReceipts).mockResolvedValueOnce({ receipts: [], total: 0 });
+
+      await getReceipts({ user_id: 'user-1', status: 'completed' }, mockLogger);
+
+      expect(receiptRepo.getReceipts).toHaveBeenCalledWith(
+        { user_id: 'user-1', status: 'completed' },
+        mockLogger,
+      );
+    });
+  });
+
+  describe('deleteReceipt', () => {
+    it('should delete receipt', async () => {
+      vi.mocked(receiptRepo.deleteReceipt).mockResolvedValueOnce(undefined);
+
+      await deleteReceipt(1, 'user-1', mockLogger);
+
+      expect(receiptRepo.deleteReceipt).toHaveBeenCalledWith(1, 'user-1', mockLogger);
+    });
+  });
+
+  describe('processReceipt', () => {
+    it('should process receipt and return items when AI not configured', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      const mockUpdatedReceipt = { ...mockReceipt, status: 'processing' };
+      const mockCompletedReceipt = { ...mockReceipt, status: 'completed' };
+
+      vi.mocked(receiptRepo.updateReceipt)
+        .mockResolvedValueOnce(mockUpdatedReceipt as any) // status: processing
+        .mockResolvedValueOnce({ ...mockUpdatedReceipt, raw_text: '[AI not configured]' } as any) // raw_text update
+        .mockResolvedValueOnce(mockCompletedReceipt as any); // status: completed
+
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValue(createMockProcessingLogRecord());
+      vi.mocked(receiptRepo.detectStoreFromText).mockResolvedValueOnce(null);
+      vi.mocked(receiptRepo.addReceiptItems).mockResolvedValueOnce([]);
+
+      const result = await processReceipt(1, mockLogger);
+
+      expect(result.receipt.status).toBe('completed');
+      expect(receiptRepo.updateReceipt).toHaveBeenCalledWith(
+        1,
+        { status: 'processing' },
+        expect.any(Object),
+      );
+    });
+
+    it('should detect store from receipt text', async () => {
+      const mockReceipt = {
+        receipt_id: 2,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.updateReceipt).mockResolvedValue({
+        ...mockReceipt,
+        status: 'completed' as ReceiptStatus,
+      } as any);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValue(createMockProcessingLogRecord());
+      vi.mocked(receiptRepo.detectStoreFromText).mockResolvedValueOnce({
+        store_id: 10,
+        confidence: 0.9,
+      });
+      vi.mocked(receiptRepo.addReceiptItems).mockResolvedValueOnce([]);
+
+      await processReceipt(2, mockLogger);
+
+      expect(receiptRepo.updateReceipt).toHaveBeenCalledWith(
+        2,
+        expect.objectContaining({ store_id: 10, store_confidence: 0.9 }),
+        expect.any(Object),
+      );
+    });
+
+    it('should handle processing errors', async () => {
+      vi.mocked(receiptRepo.updateReceipt).mockRejectedValueOnce(new Error('DB error'));
+      vi.mocked(receiptRepo.incrementRetryCount).mockResolvedValueOnce(1);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValue(createMockProcessingLogRecord());
+
+      await expect(processReceipt(1, mockLogger)).rejects.toThrow('DB error');
+
+      expect(receiptRepo.incrementRetryCount).toHaveBeenCalledWith(1, expect.any(Object));
+    });
+  });
+
+  describe('getReceiptItems', () => {
+    it('should return receipt items', async () => {
+      const mockItems = [
+        {
+          receipt_item_id: 1,
+          receipt_id: 1,
+          raw_item_description: 'MILK 2%',
+          quantity: 1,
+          price_paid_cents: 399,
+          master_item_id: null,
+          product_id: null,
+          status: 'unmatched' as ReceiptItemStatus,
+          line_number: 1,
+          match_confidence: null,
+          is_discount: false,
+          unit_price_cents: null,
+          unit_type: null,
+          added_to_pantry: false,
+          pantry_item_id: null,
+          upc_code: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(receiptRepo.getReceiptItems).mockResolvedValueOnce(mockItems);
+
+      const result = await getReceiptItems(1, mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].raw_item_description).toBe('MILK 2%');
+    });
+  });
+
+  describe('updateReceiptItem', () => {
+    it('should update receipt item', async () => {
+      const mockUpdatedItem = {
+        receipt_item_id: 1,
+        receipt_id: 1,
+        raw_item_description: 'MILK 2%',
+        quantity: 2,
+        price_paid_cents: 399,
+        master_item_id: 5,
+        product_id: null,
+        status: 'matched' as ReceiptItemStatus,
+        line_number: 1,
+        match_confidence: 0.95,
+        is_discount: false,
+        unit_price_cents: null,
+        unit_type: null,
+        added_to_pantry: false,
+        pantry_item_id: null,
+        upc_code: null,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.updateReceiptItem).mockResolvedValueOnce(mockUpdatedItem);
+
+      const result = await updateReceiptItem(
+        1,
+        { master_item_id: 5, status: 'matched' as ReceiptItemStatus, match_confidence: 0.95 },
+        mockLogger,
+      );
+
+      expect(result.quantity).toBe(2);
+      expect(result.master_item_id).toBe(5);
+      expect(result.status).toBe('matched');
+    });
+  });
+
+  describe('getUnaddedItems', () => {
+    it('should return items not yet added to pantry', async () => {
+      const mockItems = [
+        {
+          receipt_item_id: 1,
+          receipt_id: 1,
+          raw_item_description: 'BREAD',
+          quantity: 1,
+          price_paid_cents: 299,
+          master_item_id: null,
+          product_id: null,
+          status: 'unmatched' as ReceiptItemStatus,
+          line_number: 1,
+          match_confidence: null,
+          is_discount: false,
+          unit_price_cents: null,
+          unit_type: null,
+          added_to_pantry: false,
+          pantry_item_id: null,
+          upc_code: null,
+          created_at: new Date().toISOString(),
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(receiptRepo.getUnaddedReceiptItems).mockResolvedValueOnce(mockItems);
+
+      const result = await getUnaddedItems(1, mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].added_to_pantry).toBe(false);
+    });
+  });
+
+  describe('getProcessingLogs', () => {
+    it('should return processing logs for receipt', async () => {
+      const mockLogs = [
+        {
+          log_id: 1,
+          receipt_id: 1,
+          processing_step: 'upload' as ReceiptProcessingStep,
+          status: 'completed' as ReceiptProcessingStatus,
+          provider: 'internal' as OcrProvider,
+          duration_ms: 50,
+          tokens_used: null,
+          cost_cents: null,
+          input_data: null,
+          output_data: null,
+          error_message: null,
+          created_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(receiptRepo.getProcessingLogs).mockResolvedValueOnce(mockLogs);
+
+      const result = await getProcessingLogs(1, mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].processing_step).toBe('upload');
+    });
+  });
+
+  describe('getProcessingStats', () => {
+    it('should return processing statistics', async () => {
+      const mockStats = {
+        total_receipts: 100,
+        completed: 85,
+        failed: 10,
+        pending: 5,
+        avg_processing_time_ms: 2500,
+        total_cost_cents: 0,
+      };
+
+      vi.mocked(receiptRepo.getProcessingStats).mockResolvedValueOnce(mockStats);
+
+      const result = await getProcessingStats(mockLogger);
+
+      expect(result.total_receipts).toBe(100);
+      expect(result.completed).toBe(85);
+    });
+
+    it('should filter by date range', async () => {
+      const mockStats = {
+        total_receipts: 20,
+        completed: 18,
+        failed: 2,
+        pending: 0,
+        avg_processing_time_ms: 2000,
+        total_cost_cents: 0,
+      };
+
+      vi.mocked(receiptRepo.getProcessingStats).mockResolvedValueOnce(mockStats);
+
+      await getProcessingStats(mockLogger, {
+        fromDate: '2024-01-01',
+        toDate: '2024-01-31',
+      });
+
+      expect(receiptRepo.getProcessingStats).toHaveBeenCalledWith(mockLogger, {
+        fromDate: '2024-01-01',
+        toDate: '2024-01-31',
+      });
+    });
+  });
+
+  describe('getReceiptsNeedingProcessing', () => {
+    it('should return pending receipts for processing', async () => {
+      const mockReceipts = [
+        {
+          receipt_id: 1,
+          user_id: 'user-1',
+          store_id: null,
+          receipt_image_url: '/uploads/receipt.jpg',
+          transaction_date: null,
+          total_amount_cents: null,
+          status: 'pending' as ReceiptStatus,
+          raw_text: null,
+          store_confidence: null,
+          ocr_provider: null,
+          error_details: null,
+          retry_count: 0,
+          ocr_confidence: null,
+          currency: 'USD',
+          created_at: new Date().toISOString(),
+          processed_at: null,
+          updated_at: new Date().toISOString(),
+        },
+      ];
+
+      vi.mocked(receiptRepo.getReceiptsNeedingProcessing).mockResolvedValueOnce(mockReceipts);
+
+      const result = await getReceiptsNeedingProcessing(10, mockLogger);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].status).toBe('pending');
+    });
+  });
+
+  describe('addStorePattern', () => {
+    it('should add store pattern', async () => {
+      vi.mocked(receiptRepo.addStorePattern).mockResolvedValueOnce(createMockStorePatternRow());
+
+      await addStorePattern(1, 'name', 'WALMART', mockLogger, { priority: 1 });
+
+      expect(receiptRepo.addStorePattern).toHaveBeenCalledWith(1, 'name', 'WALMART', mockLogger, {
+        priority: 1,
+      });
+    });
+  });
+
+  describe('getActiveStorePatterns', () => {
+    it('should return active store patterns', async () => {
+      const mockPatterns = [
+        createMockStorePatternRow({
+          pattern_id: 1,
+          store_id: 1,
+          pattern_type: 'name',
+          pattern_value: 'WALMART',
+        }),
+      ];
+
+      vi.mocked(receiptRepo.getActiveStorePatterns).mockResolvedValueOnce(mockPatterns);
+
+      const result = await getActiveStorePatterns(mockLogger);
+
+      expect(result).toHaveLength(1);
+    });
+  });
+
+  describe('processReceiptJob', () => {
+    it('should process receipt job successfully', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptRepo.updateReceipt).mockResolvedValue({
+        ...mockReceipt,
+        status: 'completed' as ReceiptStatus,
+      } as any);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValue(createMockProcessingLogRecord());
+      vi.mocked(receiptRepo.detectStoreFromText).mockResolvedValueOnce(null);
+      vi.mocked(receiptRepo.addReceiptItems).mockResolvedValueOnce([]);
+
+      const mockJob = {
+        id: 'job-1',
+        data: {
+          receiptId: 1,
+          userId: 'user-1',
+          meta: { requestId: 'req-1' },
+        },
+        attemptsMade: 0,
+      } as Job<ReceiptJobData>;
+
+      const result = await processReceiptJob(mockJob, mockLogger);
+
+      expect(result.success).toBe(true);
+      expect(result.receiptId).toBe(1);
+    });
+
+    it('should skip already completed receipts', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'completed' as ReceiptStatus,
+        raw_text: 'Previous text',
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+
+      const mockJob = {
+        id: 'job-2',
+        data: {
+          receiptId: 1,
+          userId: 'user-1',
+        },
+        attemptsMade: 0,
+      } as Job<ReceiptJobData>;
+
+      const result = await processReceiptJob(mockJob, mockLogger);
+
+      expect(result.success).toBe(true);
+      expect(result.itemsFound).toBe(0);
+      expect(receiptRepo.updateReceipt).not.toHaveBeenCalled();
+    });
+
+    it('should handle job processing errors', async () => {
+      const mockReceipt = {
+        receipt_id: 1,
+        user_id: 'user-1',
+        store_id: null,
+        receipt_image_url: '/uploads/receipt.jpg',
+        transaction_date: null,
+        total_amount_cents: null,
+        status: 'pending' as ReceiptStatus,
+        raw_text: null,
+        store_confidence: null,
+        ocr_provider: null,
+        error_details: null,
+        retry_count: 0,
+        ocr_confidence: null,
+        currency: 'USD',
+        created_at: new Date().toISOString(),
+        processed_at: null,
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(receiptRepo.getReceiptById).mockResolvedValueOnce(mockReceipt);
+      vi.mocked(receiptRepo.updateReceipt)
+        .mockRejectedValueOnce(new Error('Processing failed'))
+        .mockResolvedValueOnce({ ...mockReceipt, status: 'failed' } as any);
+      vi.mocked(receiptRepo.incrementRetryCount).mockResolvedValueOnce(1);
+      vi.mocked(receiptRepo.logProcessingStep).mockResolvedValue(createMockProcessingLogRecord());
+
+      const mockJob = {
+        id: 'job-3',
+        data: {
+          receiptId: 1,
+          userId: 'user-1',
+        },
+        attemptsMade: 1,
+      } as Job<ReceiptJobData>;
+
+      await expect(processReceiptJob(mockJob, mockLogger)).rejects.toThrow('Processing failed');
+
+      expect(receiptRepo.updateReceipt).toHaveBeenCalledWith(
+        1,
+        expect.objectContaining({ status: 'failed' }),
+        expect.any(Object),
+      );
+    });
+  });
+});
--- a/src/services/receiptService.server.ts
+++ b/src/services/receiptService.server.ts
@@ -0,0 +1,843 @@
+// src/services/receiptService.server.ts
+/**
+ * @file Receipt Scanning Service
+ * Handles receipt image processing, OCR extraction, item parsing, and store detection.
+ * Integrates with expiry tracking for adding scanned items to inventory.
+ */
+import type { Logger } from 'pino';
+import { receiptRepo } from './db/index.db';
+import type {
+  OcrProvider,
+  ReceiptScan,
+  ReceiptItem,
+  ReceiptProcessingLogRecord,
+} from '../types/expiry';
+import type { UpdateReceiptItemRequest, ReceiptQueryOptions } from './db/receipt.db';
+
+/**
+ * Maximum number of retry attempts for failed receipt processing
+ */
+const MAX_RETRY_ATTEMPTS = 3;
+
+/**
+ * Default OCR provider to use
+ */
+const DEFAULT_OCR_PROVIDER: OcrProvider = 'internal';
+
+// ============================================================================
+// RECEIPT MANAGEMENT
+// ============================================================================
+
+/**
+ * Creates a new receipt record for processing.
+ * @param userId The user's ID
+ * @param imageUrl URL or path to the receipt image
+ * @param logger Pino logger instance
+ * @param options Optional store ID and transaction date if known
+ * @returns The created receipt record
+ */
+export const createReceipt = async (
+  userId: string,
+  imageUrl: string,
+  logger: Logger,
+  options: { storeId?: number; transactionDate?: string } = {},
+): Promise<ReceiptScan> => {
+  logger.info({ userId, imageUrl }, 'Creating new receipt for processing');
+
+  const receipt = await receiptRepo.createReceipt(
+    {
+      user_id: userId,
+      receipt_image_url: imageUrl,
+      store_id: options.storeId,
+      transaction_date: options.transactionDate,
+    },
+    logger,
+  );
+
+  // Log the upload step
+  await receiptRepo.logProcessingStep(receipt.receipt_id, 'upload', 'completed', logger, {
+    provider: DEFAULT_OCR_PROVIDER,
+  });
+
+  return receipt;
+};
+
+/**
+ * Gets a receipt by ID.
+ * @param receiptId The receipt ID
+ * @param userId The user's ID (for authorization)
+ * @param logger Pino logger instance
+ * @returns The receipt record
+ */
+export const getReceiptById = async (
+  receiptId: number,
+  userId: string,
+  logger: Logger,
+): Promise<ReceiptScan> => {
+  return receiptRepo.getReceiptById(receiptId, userId, logger);
+};
+
+/**
+ * Gets receipts for a user with optional filtering.
+ * @param options Query options
+ * @param logger Pino logger instance
+ * @returns Paginated receipts
+ */
+export const getReceipts = async (
+  options: ReceiptQueryOptions,
+  logger: Logger,
+): Promise<{ receipts: ReceiptScan[]; total: number }> => {
+  logger.debug({ userId: options.user_id }, 'Fetching receipts');
+  return receiptRepo.getReceipts(options, logger);
+};
+
+/**
+ * Deletes a receipt and all associated data.
+ * @param receiptId The receipt ID
+ * @param userId The user's ID (for authorization)
+ * @param logger Pino logger instance
+ */
+export const deleteReceipt = async (
+  receiptId: number,
+  userId: string,
+  logger: Logger,
+): Promise<void> => {
+  logger.info({ receiptId, userId }, 'Deleting receipt');
+  await receiptRepo.deleteReceipt(receiptId, userId, logger);
+};
+
+// ============================================================================
+// RECEIPT PROCESSING
+// ============================================================================
+
+/**
+ * Processes a receipt through OCR and item extraction.
+ * This is the main entry point for receipt processing, typically called by a worker.
+ * @param receiptId The receipt ID to process
+ * @param logger Pino logger instance
+ * @returns The processed receipt with extracted items
+ */
+export const processReceipt = async (
+  receiptId: number,
+  logger: Logger,
+): Promise<{ receipt: ReceiptScan; items: ReceiptItem[] }> => {
+  const processLogger = logger.child({ receiptId });
+  processLogger.info('Starting receipt processing');
+
+  const startTime = Date.now();
+
+  try {
+    // Update status to processing
+    let receipt = await receiptRepo.updateReceipt(
+      receiptId,
+      { status: 'processing' },
+      processLogger,
+    );
+
+    // Step 1: OCR Extraction
+    processLogger.debug('Starting OCR extraction');
+    const ocrResult = await performOcrExtraction(receipt.receipt_image_url, processLogger);
+
+    await receiptRepo.logProcessingStep(receiptId, 'ocr_extraction', 'completed', processLogger, {
+      provider: ocrResult.provider,
+      durationMs: ocrResult.durationMs,
+      outputData: { textLength: ocrResult.text.length, confidence: ocrResult.confidence },
+    });
+
+    // Update receipt with OCR results
+    receipt = await receiptRepo.updateReceipt(
+      receiptId,
+      {
+        raw_text: ocrResult.text,
+        ocr_provider: ocrResult.provider,
+        ocr_confidence: ocrResult.confidence,
+      },
+      processLogger,
+    );
+
+    // Step 2: Store Detection (if not already set)
+    if (!receipt.store_id) {
+      processLogger.debug('Attempting store detection');
+      const storeDetection = await receiptRepo.detectStoreFromText(ocrResult.text, processLogger);
+
+      if (storeDetection) {
+        receipt = await receiptRepo.updateReceipt(
+          receiptId,
+          {
+            store_id: storeDetection.store_id,
+            store_confidence: storeDetection.confidence,
+          },
+          processLogger,
+        );
+
+        await receiptRepo.logProcessingStep(
+          receiptId,
+          'store_detection',
+          'completed',
+          processLogger,
+          {
+            outputData: { storeId: storeDetection.store_id, confidence: storeDetection.confidence },
+          },
+        );
+      } else {
+        await receiptRepo.logProcessingStep(
+          receiptId,
+          'store_detection',
+          'completed',
+          processLogger,
+          {
+            outputData: { storeId: null, message: 'No store match found' },
+          },
+        );
+      }
+    }
+
+    // Step 3: Parse receipt text and extract items
+    // If AI extracted items directly, use those; otherwise fall back to text parsing
+    processLogger.debug('Starting text parsing and item extraction');
+    const parseStartTime = Date.now();
+
+    let itemsToAdd: Array<{
+      receipt_id: number;
+      raw_item_description: string;
+      quantity: number;
+      price_paid_cents: number;
+      line_number: number;
+      is_discount: boolean;
+      unit_price_cents?: number;
+      unit_type?: string;
+    }>;
+
+    if (ocrResult.extractedItems && ocrResult.extractedItems.length > 0) {
+      // Use AI-extracted items directly (more accurate)
+      processLogger.info(
+        { itemCount: ocrResult.extractedItems.length },
+        'Using AI-extracted items directly',
+      );
+      itemsToAdd = ocrResult.extractedItems.map((item, index) => ({
+        receipt_id: receiptId,
+        raw_item_description: item.raw_item_description,
+        quantity: 1, // AI doesn't extract quantity separately yet
+        price_paid_cents: item.price_paid_cents,
+        line_number: index + 1,
+        is_discount: item.price_paid_cents < 0,
+      }));
+    } else {
+      // Fall back to text parsing
+      const extractedItems = await parseReceiptText(ocrResult.text, processLogger);
+      itemsToAdd = extractedItems.map((item) => ({
+        receipt_id: receiptId,
+        raw_item_description: item.description,
+        quantity: item.quantity,
+        price_paid_cents: item.priceCents,
+        line_number: item.lineNumber,
+        is_discount: item.isDiscount,
+        unit_price_cents: item.unitPriceCents,
+        unit_type: item.unitType,
+      }));
+    }
+
+    await receiptRepo.logProcessingStep(receiptId, 'text_parsing', 'completed', processLogger, {
+      durationMs: Date.now() - parseStartTime,
+      outputData: { itemCount: itemsToAdd.length, usedAiExtraction: !!ocrResult.extractedItems },
+    });
+
+    // Step 4: Add extracted items to database
+    const items = await receiptRepo.addReceiptItems(itemsToAdd, processLogger);
+
+    await receiptRepo.logProcessingStep(receiptId, 'item_extraction', 'completed', processLogger, {
+      outputData: { itemsAdded: items.length },
+    });
+
+    // Step 5: Extract total and transaction date
+    const receiptMetadata = extractReceiptMetadata(ocrResult.text, processLogger);
+
+    if (receiptMetadata.totalCents || receiptMetadata.transactionDate) {
+      receipt = await receiptRepo.updateReceipt(
+        receiptId,
+        {
+          total_amount_cents: receiptMetadata.totalCents,
+          transaction_date: receiptMetadata.transactionDate,
+        },
+        processLogger,
+      );
+    }
+
+    // Step 6: Mark as completed
+    receipt = await receiptRepo.updateReceipt(
+      receiptId,
+      {
+        status: 'completed',
+        processed_at: new Date().toISOString(),
+      },
+      processLogger,
+    );
+
+    await receiptRepo.logProcessingStep(receiptId, 'finalization', 'completed', processLogger, {
+      durationMs: Date.now() - startTime,
+      outputData: { totalItems: items.length, status: 'completed' },
+    });
+
+    processLogger.info(
+      { receiptId, itemCount: items.length, durationMs: Date.now() - startTime },
+      'Receipt processing completed successfully',
+    );
+
+    return { receipt, items };
+  } catch (error) {
+    const err = error instanceof Error ? error : new Error(String(error));
+    processLogger.error({ err, receiptId }, 'Receipt processing failed');
+
+    // Increment retry count and update status
+    const _retryCount = await receiptRepo.incrementRetryCount(receiptId, processLogger);
+
+    await receiptRepo.updateReceipt(
+      receiptId,
+      {
+        status: 'failed',
+        error_details: {
+          message: err.message,
+          stack: err.stack,
+          timestamp: new Date().toISOString(),
+        },
+      },
+      processLogger,
+    );
+
+    await receiptRepo.logProcessingStep(receiptId, 'finalization', 'failed', processLogger, {
+      durationMs: Date.now() - startTime,
+      errorMessage: err.message,
+    });
+
+    throw err;
+  }
+};
+
+/**
+ * Performs OCR extraction on a receipt image using Gemini Vision API.
+ * Falls back to basic text extraction if AI is not configured.
+ * @param imageUrl URL or path to the receipt image
+ * @param logger Pino logger instance
+ * @returns OCR extraction result
+ */
+const performOcrExtraction = async (
+  imageUrl: string,
+  logger: Logger,
+): Promise<{
+  text: string;
+  provider: OcrProvider;
+  confidence: number;
+  durationMs: number;
+  extractedItems?: Array<{ raw_item_description: string; price_paid_cents: number }>;
+}> => {
+  const startTime = Date.now();
+
+  // Check if AI services are configured
+  if (!isAiConfigured) {
+    logger.warn({ imageUrl }, 'AI not configured - OCR extraction unavailable');
+    return {
+      text: '[AI not configured - please set GEMINI_API_KEY]',
+      provider: 'internal',
+      confidence: 0,
+      durationMs: Date.now() - startTime,
+    };
+  }
+
+  try {
+    // Determine if imageUrl is a local file path or URL
+    const isLocalPath = !imageUrl.startsWith('http');
+
+    if (!isLocalPath) {
+      logger.warn({ imageUrl }, 'Remote URLs not yet supported for OCR - use local file path');
+      return {
+        text: '[Remote URL OCR not yet implemented - upload file directly]',
+        provider: 'internal',
+        confidence: 0,
+        durationMs: Date.now() - startTime,
+      };
+    }
+
+    // Determine MIME type from extension
+    const ext = path.extname(imageUrl).toLowerCase();
+    const mimeTypeMap: Record<string, string> = {
+      '.jpg': 'image/jpeg',
+      '.jpeg': 'image/jpeg',
+      '.png': 'image/png',
+      '.gif': 'image/gif',
+      '.webp': 'image/webp',
+    };
+    const mimeType = mimeTypeMap[ext] || 'image/jpeg';
+
+    // Verify file exists
+    try {
+      await fs.access(imageUrl);
+    } catch {
+      logger.error({ imageUrl }, 'Receipt image file not found');
+      return {
+        text: '[Receipt image file not found]',
+        provider: 'internal',
+        confidence: 0,
+        durationMs: Date.now() - startTime,
+      };
+    }
+
+    logger.info({ imageUrl, mimeType }, 'Starting OCR extraction with Gemini Vision');
+
+    // Use the AI service to extract items from the receipt
+    const extractedItems = await aiService.extractItemsFromReceiptImage(imageUrl, mimeType, logger);
+
+    if (!extractedItems || extractedItems.length === 0) {
+      logger.warn({ imageUrl }, 'No items extracted from receipt image');
+      return {
+        text: '[No text could be extracted from receipt]',
+        provider: 'gemini',
+        confidence: 0.3,
+        durationMs: Date.now() - startTime,
+      };
+    }
+
+    // Convert extracted items to text representation for storage
+    const textLines = extractedItems.map(
+      (item) => `${item.raw_item_description} - $${(item.price_paid_cents / 100).toFixed(2)}`,
+    );
+    const extractedText = textLines.join('\n');
+
+    logger.info(
+      { imageUrl, itemCount: extractedItems.length, durationMs: Date.now() - startTime },
+      'OCR extraction completed successfully',
+    );
+
+    return {
+      text: extractedText,
+      provider: 'gemini',
+      confidence: 0.85,
+      durationMs: Date.now() - startTime,
+      extractedItems, // Pass along for direct use
+    };
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    logger.error({ err: error, imageUrl }, 'OCR extraction failed');
+
+    return {
+      text: `[OCR extraction failed: ${errorMessage}]`,
+      provider: 'internal',
+      confidence: 0,
+      durationMs: Date.now() - startTime,
+    };
+  }
+};
+
+/**
+ * Parses receipt text to extract individual line items.
+ * @param text Raw OCR text from receipt
+ * @param logger Pino logger instance
+ * @returns Array of extracted items
+ */
+const parseReceiptText = async (
+  text: string,
+  logger: Logger,
+): Promise<
+  Array<{
+    description: string;
+    quantity: number;
+    priceCents: number;
+    lineNumber: number;
+    isDiscount: boolean;
+    unitPriceCents?: number;
+    unitType?: string;
+  }>
+> => {
+  // TODO: Implement actual receipt text parsing
+  // This would use regex patterns and/or ML to:
+  // - Identify item lines vs headers/footers
+  // - Extract item names, quantities, and prices
+  // - Detect discount/coupon lines
+  // - Handle multi-line items
+
+  logger.debug({ textLength: text.length }, 'Parsing receipt text');
+
+  // Common receipt patterns to look for:
+  // - "ITEM NAME          $X.XX"
+  // - "2 @ $X.XX          $Y.YY"
+  // - "DISCOUNT          -$X.XX"
+
+  const items: Array<{
+    description: string;
+    quantity: number;
+    priceCents: number;
+    lineNumber: number;
+    isDiscount: boolean;
+    unitPriceCents?: number;
+    unitType?: string;
+  }> = [];
+
+  // Simple line-by-line parsing as placeholder
+  const lines = text.split('\n').filter((line) => line.trim());
+
+  // Pattern for price at end of line: $X.XX or X.XX
+  const pricePattern = /\$?(\d+)\.(\d{2})\s*$/;
+  // Pattern for quantity: "2 @" or "2x" or just a number at start
+  const quantityPattern = /^(\d+)\s*[@xX]/;
+
+  let lineNumber = 0;
+  for (const line of lines) {
+    lineNumber++;
+    const trimmedLine = line.trim();
+
+    // Skip empty lines and common receipt headers/footers
+    if (!trimmedLine || isHeaderOrFooter(trimmedLine)) {
+      continue;
+    }
+
+    const priceMatch = trimmedLine.match(pricePattern);
+    if (priceMatch) {
+      const dollars = parseInt(priceMatch[1], 10);
+      const cents = parseInt(priceMatch[2], 10);
+      let priceCents = dollars * 100 + cents;
+
+      // Check if it's a discount (negative)
+      const isDiscount =
+        trimmedLine.includes('-') || trimmedLine.toLowerCase().includes('discount');
+      if (isDiscount) {
+        priceCents = -Math.abs(priceCents);
+      }
+
+      // Extract description (everything before the price)
+      let description = trimmedLine.replace(pricePattern, '').trim();
+      let quantity = 1;
+
+      // Check for quantity pattern
+      const quantityMatch = description.match(quantityPattern);
+      if (quantityMatch) {
+        quantity = parseInt(quantityMatch[1], 10);
+        description = description.replace(quantityPattern, '').trim();
+      }
+
+      // Clean up description
+      description = description.replace(/[-]+\s*$/, '').trim();
+
+      if (description) {
+        items.push({
+          description,
+          quantity,
+          priceCents,
+          lineNumber,
+          isDiscount,
+        });
+      }
+    }
+  }
+
+  logger.debug({ extractedCount: items.length }, 'Receipt text parsing complete');
+  return items;
+};
+
+/**
+ * Checks if a line is likely a header or footer to skip.
+ */
+const isHeaderOrFooter = (line: string): boolean => {
+  const lowercaseLine = line.toLowerCase();
+  const skipPatterns = [
+    'thank you',
+    'thanks for',
+    'visit us',
+    'total',
+    'subtotal',
+    'tax',
+    'change',
+    'cash',
+    'credit',
+    'debit',
+    'visa',
+    'mastercard',
+    'approved',
+    'transaction',
+    'terminal',
+    'receipt',
+    'store #',
+    'date:',
+    'time:',
+    'cashier',
+  ];
+
+  return skipPatterns.some((pattern) => lowercaseLine.includes(pattern));
+};
+
+/**
+ * Extracts metadata from receipt text (total, date, etc.).
+ */
+const extractReceiptMetadata = (
+  text: string,
+  logger: Logger,
+): {
+  totalCents?: number;
+  transactionDate?: string;
+} => {
+  const result: { totalCents?: number; transactionDate?: string } = {};
+
+  // Look for total amount
+  const totalPatterns = [
+    /total[:\s]+\$?(\d+)\.(\d{2})/i,
+    /grand total[:\s]+\$?(\d+)\.(\d{2})/i,
+    /amount due[:\s]+\$?(\d+)\.(\d{2})/i,
+  ];
+
+  for (const pattern of totalPatterns) {
+    const match = text.match(pattern);
+    if (match) {
+      result.totalCents = parseInt(match[1], 10) * 100 + parseInt(match[2], 10);
+      break;
+    }
+  }
+
+  // Look for transaction date
+  const datePatterns = [
+    /(\d{1,2})\/(\d{1,2})\/(\d{2,4})/, // MM/DD/YYYY or M/D/YY
+    /(\d{4})-(\d{2})-(\d{2})/, // YYYY-MM-DD
+  ];
+
+  for (const pattern of datePatterns) {
+    const match = text.match(pattern);
+    if (match) {
+      // Try to parse the date
+      try {
+        let year: number;
+        let month: number;
+        let day: number;
+
+        if (match[0].includes('-')) {
+          // YYYY-MM-DD format
+          year = parseInt(match[1], 10);
+          month = parseInt(match[2], 10);
+          day = parseInt(match[3], 10);
+        } else {
+          // MM/DD/YYYY format
+          month = parseInt(match[1], 10);
+          day = parseInt(match[2], 10);
+          year = parseInt(match[3], 10);
+          if (year < 100) {
+            year += 2000;
+          }
+        }
+
+        const date = new Date(year, month - 1, day);
+        if (!isNaN(date.getTime())) {
+          result.transactionDate = date.toISOString().split('T')[0];
+          break;
+        }
+      } catch {
+        // Continue to next pattern
+      }
+    }
+  }
+
+  logger.debug({ result }, 'Extracted receipt metadata');
+  return result;
+};
+
+// ============================================================================
+// RECEIPT ITEMS
+// ============================================================================
+
+/**
+ * Gets all items for a receipt.
+ * @param receiptId The receipt ID
+ * @param logger Pino logger instance
+ * @returns Array of receipt items
+ */
+export const getReceiptItems = async (
+  receiptId: number,
+  logger: Logger,
+): Promise<ReceiptItem[]> => {
+  return receiptRepo.getReceiptItems(receiptId, logger);
+};
+
+/**
+ * Updates a receipt item (e.g., after manual matching).
+ * @param receiptItemId The receipt item ID
+ * @param updates Updates to apply
+ * @param logger Pino logger instance
+ * @returns Updated receipt item
+ */
+export const updateReceiptItem = async (
+  receiptItemId: number,
+  updates: UpdateReceiptItemRequest,
+  logger: Logger,
+): Promise<ReceiptItem> => {
+  return receiptRepo.updateReceiptItem(receiptItemId, updates, logger);
+};
+
+/**
+ * Gets receipt items that haven't been added to inventory.
+ * @param receiptId The receipt ID
+ * @param logger Pino logger instance
+ * @returns Array of unadded items
+ */
+export const getUnaddedItems = async (
+  receiptId: number,
+  logger: Logger,
+): Promise<ReceiptItem[]> => {
+  return receiptRepo.getUnaddedReceiptItems(receiptId, logger);
+};
+
+// ============================================================================
+// PROCESSING LOGS AND STATS
+// ============================================================================
+
+/**
+ * Gets processing logs for a receipt.
+ * @param receiptId The receipt ID
+ * @param logger Pino logger instance
+ * @returns Array of processing log records
+ */
+export const getProcessingLogs = async (
+  receiptId: number,
+  logger: Logger,
+): Promise<ReceiptProcessingLogRecord[]> => {
+  return receiptRepo.getProcessingLogs(receiptId, logger);
+};
+
+/**
+ * Gets receipt processing statistics.
+ * @param logger Pino logger instance
+ * @param options Date range options
+ * @returns Processing statistics
+ */
+export const getProcessingStats = async (
+  logger: Logger,
+  options: { fromDate?: string; toDate?: string } = {},
+): Promise<{
+  total_receipts: number;
+  completed: number;
+  failed: number;
+  pending: number;
+  avg_processing_time_ms: number;
+  total_cost_cents: number;
+}> => {
+  return receiptRepo.getProcessingStats(logger, options);
+};
+
+/**
+ * Gets receipts that need processing (for worker).
+ * @param limit Maximum number of receipts to return
+ * @param logger Pino logger instance
+ * @returns Array of receipts needing processing
+ */
+export const getReceiptsNeedingProcessing = async (
+  limit: number,
+  logger: Logger,
+): Promise<ReceiptScan[]> => {
+  return receiptRepo.getReceiptsNeedingProcessing(MAX_RETRY_ATTEMPTS, limit, logger);
+};
+
+// ============================================================================
+// STORE PATTERNS (Admin)
+// ============================================================================
+
+/**
+ * Adds a new store receipt pattern for detection.
+ * @param storeId The store ID
+ * @param patternType The pattern type
+ * @param patternValue The pattern value
+ * @param logger Pino logger instance
+ * @param options Additional options
+ */
+export const addStorePattern = async (
+  storeId: number,
+  patternType: string,
+  patternValue: string,
+  logger: Logger,
+  options: { priority?: number } = {},
+) => {
+  return receiptRepo.addStorePattern(storeId, patternType, patternValue, logger, options);
+};
+
+/**
+ * Gets all active store patterns.
+ * @param logger Pino logger instance
+ */
+export const getActiveStorePatterns = async (logger: Logger) => {
+  return receiptRepo.getActiveStorePatterns(logger);
+};
+
+// ============================================================================
+// JOB PROCESSING
+// ============================================================================
+
+import type { Job } from 'bullmq';
+import type { ReceiptJobData } from '../types/job-data';
+import { aiService } from './aiService.server';
+import { isAiConfigured } from '../config/env';
+import path from 'node:path';
+import fs from 'node:fs/promises';
+
+/**
+ * Processes a receipt processing job from the queue.
+ * This is the main entry point for background receipt processing.
+ * @param job The BullMQ job
+ * @param logger Pino logger instance
+ * @returns Processing result
+ */
+export const processReceiptJob = async (
+  job: Job<ReceiptJobData>,
+  logger: Logger,
+): Promise<{ success: boolean; itemsFound: number; receiptId: number }> => {
+  const { receiptId, userId } = job.data;
+  const jobLogger = logger.child({
+    jobId: job.id,
+    receiptId,
+    userId,
+    requestId: job.data.meta?.requestId,
+  });
+
+  jobLogger.info('Starting receipt processing job');
+
+  try {
+    // Get the receipt record to verify ownership and status
+    const existingReceipt = await receiptRepo.getReceiptById(receiptId, userId, jobLogger);
+
+    if (existingReceipt.status === 'completed') {
+      jobLogger.info('Receipt already processed, skipping');
+      return { success: true, itemsFound: 0, receiptId };
+    }
+
+    // Process the receipt (this handles status updates internally)
+    const result = await processReceipt(receiptId, jobLogger);
+
+    const itemsFound = result.items.length;
+    const isSuccess = result.receipt.status === 'completed';
+
+    jobLogger.info(
+      { itemsFound, status: result.receipt.status },
+      'Receipt processing job completed',
+    );
+
+    return {
+      success: isSuccess,
+      itemsFound,
+      receiptId,
+    };
+  } catch (error) {
+    jobLogger.error({ err: error }, 'Receipt processing job failed');
+
+    // Update receipt status to failed
+    try {
+      await receiptRepo.updateReceipt(
+        receiptId,
+        {
+          status: 'failed',
+          error_details: {
+            error: error instanceof Error ? error.message : String(error),
+            jobId: job.id,
+            attemptsMade: job.attemptsMade,
+          },
+        },
+        jobLogger,
+      );
+    } catch (updateError) {
+      jobLogger.error({ err: updateError }, 'Failed to update receipt status after error');
+    }
+
+    throw error;
+  }
+};
--- a/src/services/sentry.client.ts
+++ b/src/services/sentry.client.ts
@@ -0,0 +1,124 @@
+// src/services/sentry.client.ts
+/**
+ * Sentry SDK initialization for client-side error tracking.
+ * Implements ADR-015: Application Performance Monitoring and Error Tracking.
+ *
+ * This module configures @sentry/react to send errors to our self-hosted
+ * Bugsink instance, which is Sentry-compatible.
+ *
+ * IMPORTANT: This module should be imported and initialized at the very top
+ * of index.tsx, before any other imports, to ensure all errors are captured.
+ */
+import * as Sentry from '@sentry/react';
+import config from '../config';
+import { logger } from './logger.client';
+
+/** Whether Sentry is properly configured (DSN present and enabled) */
+export const isSentryConfigured = !!config.sentry.dsn && config.sentry.enabled;
+
+/**
+ * Initializes the Sentry SDK for the browser.
+ * Should be called once at application startup.
+ */
+export function initSentry(): void {
+  if (!isSentryConfigured) {
+    logger.info('[Sentry] Error tracking disabled (VITE_SENTRY_DSN not configured)');
+    return;
+  }
+
+  Sentry.init({
+    dsn: config.sentry.dsn,
+    environment: config.sentry.environment,
+    debug: config.sentry.debug,
+
+    // Performance monitoring - disabled for now to keep it simple
+    tracesSampleRate: 0,
+
+    // Capture console.error as breadcrumbs
+    integrations: [
+      Sentry.breadcrumbsIntegration({
+        console: true,
+        dom: true,
+        fetch: true,
+        history: true,
+        xhr: true,
+      }),
+    ],
+
+    // Filter out development-only errors and noise
+    beforeSend(event) {
+      // Skip errors from browser extensions
+      if (
+        event.exception?.values?.[0]?.stacktrace?.frames?.some((frame) =>
+          frame.filename?.includes('extension://'),
+        )
+      ) {
+        return null;
+      }
+      return event;
+    },
+  });
+
+  logger.info(`[Sentry] Error tracking initialized (${config.sentry.environment})`);
+}
+
+/**
+ * Captures an exception and sends it to Sentry.
+ * Use this for errors that are caught and handled gracefully.
+ */
+export function captureException(
+  error: Error,
+  context?: Record<string, unknown>,
+): string | undefined {
+  if (!isSentryConfigured) {
+    return undefined;
+  }
+
+  if (context) {
+    Sentry.setContext('additional', context);
+  }
+
+  return Sentry.captureException(error);
+}
+
+/**
+ * Captures a message and sends it to Sentry.
+ * Use this for non-exception events that should be tracked.
+ */
+export function captureMessage(
+  message: string,
+  level: Sentry.SeverityLevel = 'info',
+): string | undefined {
+  if (!isSentryConfigured) {
+    return undefined;
+  }
+
+  return Sentry.captureMessage(message, level);
+}
+
+/**
+ * Sets the user context for all subsequent events.
+ * Call this after user authentication.
+ */
+export function setUser(user: { id: string; email?: string; username?: string } | null): void {
+  if (!isSentryConfigured) {
+    return;
+  }
+
+  Sentry.setUser(user);
+}
+
+/**
+ * Adds a breadcrumb to the current scope.
+ * Breadcrumbs are logged actions that led up to an error.
+ */
+export function addBreadcrumb(breadcrumb: Sentry.Breadcrumb): void {
+  if (!isSentryConfigured) {
+    return;
+  }
+
+  Sentry.addBreadcrumb(breadcrumb);
+}
+
+// Re-export Sentry for advanced usage (Error Boundary, etc.)
+export { Sentry };
--- a/src/services/sentry.server.ts
+++ b/src/services/sentry.server.ts
@@ -0,0 +1,161 @@
+// src/services/sentry.server.ts
+/**
+ * Sentry SDK initialization for error tracking.
+ * Implements ADR-015: Application Performance Monitoring and Error Tracking.
+ *
+ * This module configures @sentry/node to send errors to our self-hosted
+ * Bugsink instance, which is Sentry-compatible.
+ *
+ * IMPORTANT: This module should be imported and initialized at the very top
+ * of server.ts, before any other imports, to ensure all errors are captured.
+ *
+ * Note: Uses Sentry SDK v8+ API which differs significantly from v7.
+ */
+import * as Sentry from '@sentry/node';
+import type { Request, Response, NextFunction, ErrorRequestHandler } from 'express';
+import { config, isSentryConfigured, isProduction, isTest } from '../config/env';
+import { logger } from './logger.server';
+
+/**
+ * Initializes the Sentry SDK with the configured DSN.
+ * Should be called once at application startup.
+ */
+export function initSentry(): void {
+  if (!isSentryConfigured) {
+    logger.info('[Sentry] Error tracking disabled (SENTRY_DSN not configured)');
+    return;
+  }
+
+  // Don't initialize Sentry in test environment
+  if (isTest) {
+    logger.debug('[Sentry] Skipping initialization in test environment');
+    return;
+  }
+
+  Sentry.init({
+    dsn: config.sentry.dsn,
+    environment: config.sentry.environment || config.server.nodeEnv,
+    debug: config.sentry.debug,
+
+    // Performance monitoring - disabled for now to keep it simple
+    tracesSampleRate: 0,
+
+    // Before sending an event, add additional context
+    beforeSend(event, hint) {
+      // In development, log errors to console as well
+      if (!isProduction && hint.originalException) {
+        logger.error(
+          { err: hint.originalException, sentryEventId: event.event_id },
+          '[Sentry] Capturing error',
+        );
+      }
+      return event;
+    },
+  });
+
+  logger.info(
+    { environment: config.sentry.environment || config.server.nodeEnv },
+    '[Sentry] Error tracking initialized',
+  );
+}
+
+/**
+ * Creates Sentry middleware for Express.
+ * Returns the request handler and error handler middleware.
+ *
+ * In Sentry SDK v8+, the old Handlers.requestHandler and Handlers.errorHandler
+ * have been replaced. Request context is now captured automatically via the
+ * Express integration. We provide a custom error handler that filters errors.
+ */
+export function getSentryMiddleware(): {
+  requestHandler: (req: Request, res: Response, next: NextFunction) => void;
+  errorHandler: ErrorRequestHandler;
+} {
+  if (!isSentryConfigured || isTest) {
+    // Return no-op middleware when Sentry is not configured
+    return {
+      requestHandler: (_req: Request, _res: Response, next: NextFunction) => next(),
+      errorHandler: (_err: Error, _req: Request, _res: Response, next: NextFunction) => next(_err),
+    };
+  }
+
+  return {
+    // In SDK v8+, request context is captured automatically.
+    // This middleware is a placeholder for compatibility.
+    requestHandler: (_req: Request, _res: Response, next: NextFunction) => next(),
+
+    // Custom error handler that captures errors to Sentry
+    errorHandler: (err: Error, _req: Request, _res: Response, next: NextFunction) => {
+      // Only send 5xx errors to Sentry by default
+      const statusCode =
+        (err as Error & { statusCode?: number }).statusCode ||
+        (err as Error & { status?: number }).status ||
+        500;
+
+      if (statusCode >= 500) {
+        Sentry.captureException(err);
+      }
+
+      // Pass the error to the next error handler
+      next(err);
+    },
+  };
+}
+
+/**
+ * Captures an exception and sends it to Sentry.
+ * Use this for errors that are caught and handled gracefully.
+ */
+export function captureException(error: Error, context?: Record<string, unknown>): string | null {
+  if (!isSentryConfigured || isTest) {
+    return null;
+  }
+
+  if (context) {
+    Sentry.setContext('additional', context);
+  }
+
+  return Sentry.captureException(error);
+}
+
+/**
+ * Captures a message and sends it to Sentry.
+ * Use this for non-exception events that should be tracked.
+ */
+export function captureMessage(
+  message: string,
+  level: Sentry.SeverityLevel = 'info',
+): string | null {
+  if (!isSentryConfigured || isTest) {
+    return null;
+  }
+
+  return Sentry.captureMessage(message, level);
+}
+
+/**
+ * Sets the user context for all subsequent events.
+ * Call this after user authentication.
+ */
+export function setUser(user: { id: string; email?: string; username?: string } | null): void {
+  if (!isSentryConfigured || isTest) {
+    return;
+  }
+
+  Sentry.setUser(user);
+}
+
+/**
+ * Adds a breadcrumb to the current scope.
+ * Breadcrumbs are logged actions that led up to an error.
+ */
+export function addBreadcrumb(breadcrumb: Sentry.Breadcrumb): void {
+  if (!isSentryConfigured || isTest) {
+    return;
+  }
+
+  Sentry.addBreadcrumb(breadcrumb);
+}
+
+// Re-export Sentry for advanced usage
+export { Sentry };
--- a/src/services/upcService.server.test.ts
+++ b/src/services/upcService.server.test.ts
@@ -0,0 +1,674 @@
+// src/services/upcService.server.test.ts
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import type { Logger } from 'pino';
+import { createMockLogger } from '../tests/utils/mockLogger';
+import type { UpcScanSource, UpcExternalLookupRecord, UpcExternalSource } from '../types/upc';
+
+// Mock dependencies
+vi.mock('./db/index.db', () => ({
+  upcRepo: {
+    recordScan: vi.fn(),
+    findProductByUpc: vi.fn(),
+    findExternalLookup: vi.fn(),
+    upsertExternalLookup: vi.fn(),
+    linkUpcToProduct: vi.fn(),
+    getScanHistory: vi.fn(),
+    getUserScanStats: vi.fn(),
+    getScanById: vi.fn(),
+  },
+}));
+
+vi.mock('../config/env', () => ({
+  config: {
+    upc: {
+      upcItemDbApiKey: undefined,
+      barcodeLookupApiKey: undefined,
+    },
+  },
+  isUpcItemDbConfigured: false,
+  isBarcodeLookupConfigured: false,
+}));
+
+vi.mock('./logger.server', () => ({
+  logger: {
+    child: vi.fn().mockReturnThis(),
+    debug: vi.fn(),
+    info: vi.fn(),
+    warn: vi.fn(),
+    error: vi.fn(),
+  },
+}));
+
+// Mock global fetch
+const mockFetch = vi.fn();
+global.fetch = mockFetch;
+
+// Import after mocks are set up
+import {
+  isValidUpcCode,
+  normalizeUpcCode,
+  detectBarcodeFromImage,
+  lookupExternalUpc,
+  scanUpc,
+  lookupUpc,
+  linkUpcToProduct,
+  getScanHistory,
+  getScanStats,
+  getScanById,
+} from './upcService.server';
+
+import { upcRepo } from './db/index.db';
+
+// Helper to create mock UpcExternalLookupRecord
+function createMockExternalLookupRecord(
+  overrides: Partial<UpcExternalLookupRecord> = {},
+): UpcExternalLookupRecord {
+  return {
+    lookup_id: 1,
+    upc_code: '012345678905',
+    product_name: null,
+    brand_name: null,
+    category: null,
+    description: null,
+    image_url: null,
+    external_source: 'openfoodfacts' as UpcExternalSource,
+    lookup_data: null,
+    lookup_successful: false,
+    created_at: new Date().toISOString(),
+    updated_at: new Date().toISOString(),
+    ...overrides,
+  };
+}
+
+// Helper to create mock ProductRow (from db layer - matches upc.db.ts)
+interface ProductRow {
+  product_id: number;
+  name: string;
+  brand_id: number | null;
+  category_id: number | null;
+  description: string | null;
+  size: string | null;
+  upc_code: string | null;
+  master_item_id: number | null;
+  created_at: string;
+  updated_at: string;
+}
+
+function createMockProductRow(overrides: Partial<ProductRow> = {}): ProductRow {
+  return {
+    product_id: 1,
+    name: 'Test Product',
+    brand_id: null,
+    category_id: null,
+    description: null,
+    size: null,
+    upc_code: '012345678905',
+    master_item_id: null,
+    created_at: new Date().toISOString(),
+    updated_at: new Date().toISOString(),
+    ...overrides,
+  };
+}
+
+describe('upcService.server', () => {
+  let mockLogger: Logger;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockLogger = createMockLogger();
+    mockFetch.mockReset();
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe('isValidUpcCode', () => {
+    it('should return true for valid 12-digit UPC-A', () => {
+      expect(isValidUpcCode('012345678905')).toBe(true);
+    });
+
+    it('should return true for valid 8-digit UPC-E', () => {
+      expect(isValidUpcCode('01234567')).toBe(true);
+    });
+
+    it('should return true for valid 13-digit EAN-13', () => {
+      expect(isValidUpcCode('5901234123457')).toBe(true);
+    });
+
+    it('should return true for valid 8-digit EAN-8', () => {
+      expect(isValidUpcCode('96385074')).toBe(true);
+    });
+
+    it('should return true for valid 14-digit GTIN-14', () => {
+      expect(isValidUpcCode('00012345678905')).toBe(true);
+    });
+
+    it('should return false for code with less than 8 digits', () => {
+      expect(isValidUpcCode('1234567')).toBe(false);
+    });
+
+    it('should return false for code with more than 14 digits', () => {
+      expect(isValidUpcCode('123456789012345')).toBe(false);
+    });
+
+    it('should return false for code with non-numeric characters', () => {
+      expect(isValidUpcCode('01234567890A')).toBe(false);
+    });
+
+    it('should return false for empty string', () => {
+      expect(isValidUpcCode('')).toBe(false);
+    });
+  });
+
+  describe('normalizeUpcCode', () => {
+    it('should remove spaces from UPC code', () => {
+      expect(normalizeUpcCode('012 345 678 905')).toBe('012345678905');
+    });
+
+    it('should remove dashes from UPC code', () => {
+      expect(normalizeUpcCode('012-345-678-905')).toBe('012345678905');
+    });
+
+    it('should remove mixed spaces and dashes', () => {
+      expect(normalizeUpcCode('012-345 678-905')).toBe('012345678905');
+    });
+
+    it('should return unchanged if no spaces or dashes', () => {
+      expect(normalizeUpcCode('012345678905')).toBe('012345678905');
+    });
+  });
+
+  describe('detectBarcodeFromImage', () => {
+    it('should return not implemented error', async () => {
+      const result = await detectBarcodeFromImage('base64imagedata', mockLogger);
+
+      expect(result.detected).toBe(false);
+      expect(result.upc_code).toBeNull();
+      expect(result.error).toBe(
+        'Barcode detection from images is not yet implemented. Please use manual entry.',
+      );
+    });
+  });
+
+  describe('lookupExternalUpc', () => {
+    it('should return product info from Open Food Facts on success', async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          status: 1,
+          product: {
+            product_name: 'Test Product',
+            brands: 'Test Brand',
+            categories_tags: ['en:snacks'],
+            ingredients_text: 'Test ingredients',
+            image_url: 'https://example.com/image.jpg',
+          },
+        }),
+      });
+
+      const result = await lookupExternalUpc('012345678905', mockLogger);
+
+      expect(result).not.toBeNull();
+      expect(result?.name).toBe('Test Product');
+      expect(result?.brand).toBe('Test Brand');
+      expect(result?.source).toBe('openfoodfacts');
+    });
+
+    it('should return null when Open Food Facts returns status 0', async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          status: 0,
+          product: null,
+        }),
+      });
+
+      const result = await lookupExternalUpc('012345678905', mockLogger);
+
+      expect(result).toBeNull();
+    });
+
+    it('should return null when Open Food Facts request fails', async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: false,
+        status: 500,
+      });
+
+      const result = await lookupExternalUpc('012345678905', mockLogger);
+
+      expect(result).toBeNull();
+    });
+
+    it('should return null on network error', async () => {
+      mockFetch.mockRejectedValueOnce(new Error('Network error'));
+
+      const result = await lookupExternalUpc('012345678905', mockLogger);
+
+      expect(result).toBeNull();
+    });
+
+    it('should use generic_name when product_name is missing', async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          status: 1,
+          product: {
+            generic_name: 'Generic Product Name',
+            brands: null,
+          },
+        }),
+      });
+
+      const result = await lookupExternalUpc('012345678905', mockLogger);
+
+      expect(result?.name).toBe('Generic Product Name');
+    });
+  });
+
+  describe('scanUpc', () => {
+    it('should scan with manual entry and return product from database', async () => {
+      const mockProduct = {
+        product_id: 1,
+        name: 'Test Product',
+        brand: 'Test Brand',
+        category: 'Snacks',
+        description: null,
+        size: '100g',
+        upc_code: '012345678905',
+        image_url: null,
+        master_item_id: null,
+      };
+
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(mockProduct);
+      vi.mocked(upcRepo.recordScan).mockResolvedValueOnce({
+        scan_id: 1,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: 1,
+        scan_source: 'manual_entry',
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await scanUpc(
+        'user-1',
+        { upc_code: '012345678905', scan_source: 'manual_entry' },
+        mockLogger,
+      );
+
+      expect(result.upc_code).toBe('012345678905');
+      expect(result.product).toEqual(mockProduct);
+      expect(result.lookup_successful).toBe(true);
+      expect(result.is_new_product).toBe(false);
+      expect(result.confidence).toBe(1.0);
+    });
+
+    it('should scan with manual entry and perform external lookup when not in database', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.findExternalLookup).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.upsertExternalLookup).mockResolvedValueOnce(
+        createMockExternalLookupRecord(),
+      );
+      vi.mocked(upcRepo.recordScan).mockResolvedValueOnce({
+        scan_id: 2,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: null,
+        scan_source: 'manual_entry',
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          status: 1,
+          product: {
+            product_name: 'External Product',
+            brands: 'External Brand',
+          },
+        }),
+      });
+
+      const result = await scanUpc(
+        'user-1',
+        { upc_code: '012345678905', scan_source: 'manual_entry' },
+        mockLogger,
+      );
+
+      expect(result.product).toBeNull();
+      expect(result.external_lookup).not.toBeNull();
+      expect(result.external_lookup?.name).toBe('External Product');
+      expect(result.is_new_product).toBe(true);
+    });
+
+    it('should use cached external lookup when available', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.findExternalLookup).mockResolvedValueOnce({
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'Cached Product',
+        brand_name: 'Cached Brand',
+        category: 'Cached Category',
+        description: null,
+        image_url: null,
+        external_source: 'openfoodfacts',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+      vi.mocked(upcRepo.recordScan).mockResolvedValueOnce({
+        scan_id: 3,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: null,
+        scan_source: 'manual_entry',
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await scanUpc(
+        'user-1',
+        { upc_code: '012345678905', scan_source: 'manual_entry' },
+        mockLogger,
+      );
+
+      expect(result.external_lookup?.name).toBe('Cached Product');
+      expect(mockFetch).not.toHaveBeenCalled();
+    });
+
+    it('should throw error for invalid UPC code format', async () => {
+      await expect(
+        scanUpc('user-1', { upc_code: 'invalid', scan_source: 'manual_entry' }, mockLogger),
+      ).rejects.toThrow('Invalid UPC code format. UPC codes must be 8-14 digits.');
+    });
+
+    it('should throw error when neither upc_code nor image_base64 provided', async () => {
+      await expect(
+        scanUpc('user-1', { scan_source: 'manual_entry' } as any, mockLogger),
+      ).rejects.toThrow('Either upc_code or image_base64 must be provided.');
+    });
+
+    it('should record failed scan when image detection fails', async () => {
+      vi.mocked(upcRepo.recordScan).mockResolvedValueOnce({
+        scan_id: 4,
+        user_id: 'user-1',
+        upc_code: 'DETECTION_FAILED',
+        product_id: null,
+        scan_source: 'image_upload',
+        scan_confidence: 0,
+        raw_image_path: null,
+        lookup_successful: false,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await scanUpc(
+        'user-1',
+        { image_base64: 'base64data', scan_source: 'image_upload' },
+        mockLogger,
+      );
+
+      expect(result.lookup_successful).toBe(false);
+      expect(result.confidence).toBe(0);
+    });
+  });
+
+  describe('lookupUpc', () => {
+    it('should return product from database when found', async () => {
+      const mockProduct = {
+        product_id: 1,
+        name: 'Test Product',
+        brand: 'Test Brand',
+        category: 'Snacks',
+        description: null,
+        size: '100g',
+        upc_code: '012345678905',
+        image_url: null,
+        master_item_id: null,
+      };
+
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(mockProduct);
+
+      const result = await lookupUpc({ upc_code: '012345678905' }, mockLogger);
+
+      expect(result.found).toBe(true);
+      expect(result.product).toEqual(mockProduct);
+      expect(result.from_cache).toBe(false);
+    });
+
+    it('should return cached external lookup when available', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.findExternalLookup).mockResolvedValueOnce({
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: 'Cached Product',
+        brand_name: null,
+        category: null,
+        description: null,
+        image_url: null,
+        external_source: 'openfoodfacts',
+        lookup_data: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await lookupUpc({ upc_code: '012345678905' }, mockLogger);
+
+      expect(result.found).toBe(true);
+      expect(result.from_cache).toBe(true);
+      expect(result.external_lookup?.name).toBe('Cached Product');
+    });
+
+    it('should return cached unsuccessful lookup', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.findExternalLookup).mockResolvedValueOnce({
+        lookup_id: 1,
+        upc_code: '012345678905',
+        product_name: null,
+        brand_name: null,
+        category: null,
+        description: null,
+        image_url: null,
+        external_source: 'unknown',
+        lookup_data: null,
+        lookup_successful: false,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      });
+
+      const result = await lookupUpc({ upc_code: '012345678905' }, mockLogger);
+
+      expect(result.found).toBe(false);
+      expect(result.from_cache).toBe(true);
+    });
+
+    it('should perform fresh external lookup when force_refresh is true', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.upsertExternalLookup).mockResolvedValueOnce(
+        createMockExternalLookupRecord(),
+      );
+
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          status: 1,
+          product: {
+            product_name: 'Fresh External Product',
+            brands: 'Fresh Brand',
+          },
+        }),
+      });
+
+      const result = await lookupUpc({ upc_code: '012345678905', force_refresh: true }, mockLogger);
+
+      expect(result.from_cache).toBe(false);
+      expect(result.external_lookup?.name).toBe('Fresh External Product');
+      expect(upcRepo.findExternalLookup).not.toHaveBeenCalled();
+    });
+
+    it('should throw error for invalid UPC code', async () => {
+      await expect(lookupUpc({ upc_code: 'invalid' }, mockLogger)).rejects.toThrow(
+        'Invalid UPC code format. UPC codes must be 8-14 digits.',
+      );
+    });
+
+    it('should normalize UPC code before lookup', async () => {
+      vi.mocked(upcRepo.findProductByUpc).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.findExternalLookup).mockResolvedValueOnce(null);
+      vi.mocked(upcRepo.upsertExternalLookup).mockResolvedValueOnce(
+        createMockExternalLookupRecord(),
+      );
+
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ status: 0 }),
+      });
+
+      const result = await lookupUpc({ upc_code: '012-345-678-905' }, mockLogger);
+
+      expect(result.upc_code).toBe('012345678905');
+    });
+  });
+
+  describe('linkUpcToProduct', () => {
+    it('should link UPC code to product successfully', async () => {
+      vi.mocked(upcRepo.linkUpcToProduct).mockResolvedValueOnce(createMockProductRow());
+
+      await linkUpcToProduct(1, '012345678905', mockLogger);
+
+      expect(upcRepo.linkUpcToProduct).toHaveBeenCalledWith(1, '012345678905', mockLogger);
+    });
+
+    it('should throw error for invalid UPC code', async () => {
+      await expect(linkUpcToProduct(1, 'invalid', mockLogger)).rejects.toThrow(
+        'Invalid UPC code format. UPC codes must be 8-14 digits.',
+      );
+    });
+
+    it('should normalize UPC code before linking', async () => {
+      vi.mocked(upcRepo.linkUpcToProduct).mockResolvedValueOnce(createMockProductRow());
+
+      await linkUpcToProduct(1, '012-345-678-905', mockLogger);
+
+      expect(upcRepo.linkUpcToProduct).toHaveBeenCalledWith(1, '012345678905', mockLogger);
+    });
+  });
+
+  describe('getScanHistory', () => {
+    it('should return paginated scan history', async () => {
+      const mockHistory = {
+        scans: [
+          {
+            scan_id: 1,
+            user_id: 'user-1',
+            upc_code: '012345678905',
+            product_id: 1,
+            scan_source: 'manual_entry' as UpcScanSource,
+            scan_confidence: 1.0,
+            raw_image_path: null,
+            lookup_successful: true,
+            created_at: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          },
+        ],
+        total: 1,
+      };
+
+      vi.mocked(upcRepo.getScanHistory).mockResolvedValueOnce(mockHistory);
+
+      const result = await getScanHistory({ user_id: 'user-1', limit: 10, offset: 0 }, mockLogger);
+
+      expect(result.scans).toHaveLength(1);
+      expect(result.total).toBe(1);
+    });
+
+    it('should filter by scan source', async () => {
+      vi.mocked(upcRepo.getScanHistory).mockResolvedValueOnce({ scans: [], total: 0 });
+
+      await getScanHistory({ user_id: 'user-1', scan_source: 'image_upload' }, mockLogger);
+
+      expect(upcRepo.getScanHistory).toHaveBeenCalledWith(
+        { user_id: 'user-1', scan_source: 'image_upload' },
+        mockLogger,
+      );
+    });
+
+    it('should filter by date range', async () => {
+      vi.mocked(upcRepo.getScanHistory).mockResolvedValueOnce({ scans: [], total: 0 });
+
+      await getScanHistory(
+        {
+          user_id: 'user-1',
+          from_date: '2024-01-01',
+          to_date: '2024-01-31',
+        },
+        mockLogger,
+      );
+
+      expect(upcRepo.getScanHistory).toHaveBeenCalledWith(
+        {
+          user_id: 'user-1',
+          from_date: '2024-01-01',
+          to_date: '2024-01-31',
+        },
+        mockLogger,
+      );
+    });
+  });
+
+  describe('getScanStats', () => {
+    it('should return user scan statistics', async () => {
+      const mockStats = {
+        total_scans: 100,
+        successful_lookups: 80,
+        unique_products: 50,
+        scans_today: 5,
+        scans_this_week: 20,
+      };
+
+      vi.mocked(upcRepo.getUserScanStats).mockResolvedValueOnce(mockStats);
+
+      const result = await getScanStats('user-1', mockLogger);
+
+      expect(result).toEqual(mockStats);
+      expect(upcRepo.getUserScanStats).toHaveBeenCalledWith('user-1', mockLogger);
+    });
+  });
+
+  describe('getScanById', () => {
+    it('should return scan record by ID', async () => {
+      const mockScan = {
+        scan_id: 1,
+        user_id: 'user-1',
+        upc_code: '012345678905',
+        product_id: 1,
+        scan_source: 'manual_entry' as UpcScanSource,
+        scan_confidence: 1.0,
+        raw_image_path: null,
+        lookup_successful: true,
+        created_at: new Date().toISOString(),
+        updated_at: new Date().toISOString(),
+      };
+
+      vi.mocked(upcRepo.getScanById).mockResolvedValueOnce(mockScan);
+
+      const result = await getScanById(1, 'user-1', mockLogger);
+
+      expect(result).toEqual(mockScan);
+      expect(upcRepo.getScanById).toHaveBeenCalledWith(1, 'user-1', mockLogger);
+    });
+  });
+});
--- a/src/services/upcService.server.ts
+++ b/src/services/upcService.server.ts
@@ -0,0 +1,614 @@
+// src/services/upcService.server.ts
+/**
+ * @file UPC Scanning Service
+ * Handles UPC barcode scanning, lookup, and external API integration.
+ * Provides functionality for scanning barcodes from images and manual entry.
+ */
+import type { Logger } from 'pino';
+import { upcRepo } from './db/index.db';
+import type {
+  UpcScanRequest,
+  UpcScanResult,
+  UpcLookupResult,
+  UpcProductMatch,
+  UpcExternalProductInfo,
+  UpcExternalLookupOptions,
+  UpcScanHistoryQueryOptions,
+  UpcScanHistoryRecord,
+  BarcodeDetectionResult,
+} from '../types/upc';
+import { config, isUpcItemDbConfigured, isBarcodeLookupConfigured } from '../config/env';
+
+/**
+ * Default cache age for external lookups (7 days in hours)
+ */
+const DEFAULT_CACHE_AGE_HOURS = 168;
+
+/**
+ * UPC code validation regex (8-14 digits)
+ */
+const UPC_CODE_REGEX = /^[0-9]{8,14}$/;
+
+/**
+ * Validates a UPC code format.
+ * @param upcCode The UPC code to validate
+ * @returns True if the UPC code is valid, false otherwise
+ */
+export const isValidUpcCode = (upcCode: string): boolean => {
+  return UPC_CODE_REGEX.test(upcCode);
+};
+
+/**
+ * Normalizes a UPC code by removing spaces and dashes.
+ * @param upcCode The raw UPC code input
+ * @returns Normalized UPC code
+ */
+export const normalizeUpcCode = (upcCode: string): string => {
+  return upcCode.replace(/[\s-]/g, '');
+};
+
+/**
+ * Detects and decodes a barcode from an image.
+ * This is a placeholder for actual barcode detection implementation.
+ * In production, this would use a library like zxing-js, quagga, or an external service.
+ * @param imageBase64 Base64-encoded image data
+ * @param logger Pino logger instance
+ * @returns Barcode detection result
+ */
+export const detectBarcodeFromImage = async (
+  imageBase64: string,
+  logger: Logger,
+): Promise<BarcodeDetectionResult> => {
+  logger.debug({ imageLength: imageBase64.length }, 'Attempting to detect barcode from image');
+
+  // TODO: Implement actual barcode detection using a library like:
+  // - @nickvdyck/barcode-reader (pure JS)
+  // - dynamsoft-javascript-barcode (commercial)
+  // - External service like Google Cloud Vision API
+  //
+  // For now, return a placeholder response indicating detection is not yet implemented
+  logger.warn('Barcode detection from images is not yet implemented');
+
+  return {
+    detected: false,
+    upc_code: null,
+    confidence: null,
+    format: null,
+    error: 'Barcode detection from images is not yet implemented. Please use manual entry.',
+  };
+};
+
+/**
+ * Looks up product in Open Food Facts API (free, open source).
+ * @param upcCode The UPC code to look up
+ * @param logger Pino logger instance
+ * @returns External product information or null if not found
+ */
+const lookupOpenFoodFacts = async (
+  upcCode: string,
+  logger: Logger,
+): Promise<UpcExternalProductInfo | null> => {
+  try {
+    const openFoodFactsUrl = `https://world.openfoodfacts.org/api/v2/product/${upcCode}`;
+    logger.debug({ url: openFoodFactsUrl }, 'Querying Open Food Facts API');
+
+    const response = await fetch(openFoodFactsUrl, {
+      headers: {
+        'User-Agent': 'FlyerCrawler/1.0 (contact@projectium.com)',
+      },
+    });
+
+    if (response.ok) {
+      const data = await response.json();
+
+      if (data.status === 1 && data.product) {
+        const product = data.product;
+        logger.info(
+          { upcCode, productName: product.product_name },
+          'Found product in Open Food Facts',
+        );
+
+        return {
+          name: product.product_name || product.generic_name || 'Unknown Product',
+          brand: product.brands || null,
+          category: product.categories_tags?.[0]?.replace('en:', '') || null,
+          description: product.ingredients_text || null,
+          image_url: product.image_url || product.image_front_url || null,
+          source: 'openfoodfacts',
+          raw_data: product,
+        };
+      }
+    }
+
+    logger.debug({ upcCode }, 'Product not found in Open Food Facts');
+  } catch (error) {
+    const err = error instanceof Error ? error : new Error(String(error));
+    logger.warn({ err, upcCode }, 'Error querying Open Food Facts API');
+  }
+
+  return null;
+};
+
+/**
+ * Looks up product in UPC Item DB API.
+ * Requires UPC_ITEM_DB_API_KEY environment variable.
+ * @see https://www.upcitemdb.com/wp/docs/main/development/
+ * @param upcCode The UPC code to look up
+ * @param logger Pino logger instance
+ * @returns External product information or null if not found
+ */
+const lookupUpcItemDb = async (
+  upcCode: string,
+  logger: Logger,
+): Promise<UpcExternalProductInfo | null> => {
+  if (!isUpcItemDbConfigured) {
+    logger.debug('UPC Item DB API key not configured, skipping');
+    return null;
+  }
+
+  try {
+    const url = `https://api.upcitemdb.com/prod/trial/lookup?upc=${upcCode}`;
+    logger.debug({ url }, 'Querying UPC Item DB API');
+
+    const response = await fetch(url, {
+      headers: {
+        'Content-Type': 'application/json',
+        user_key: config.upc.upcItemDbApiKey!,
+        key_type: '3scale',
+      },
+    });
+
+    if (response.ok) {
+      const data = await response.json();
+
+      if (data.code === 'OK' && data.items && data.items.length > 0) {
+        const item = data.items[0];
+        logger.info({ upcCode, productName: item.title }, 'Found product in UPC Item DB');
+
+        return {
+          name: item.title || 'Unknown Product',
+          brand: item.brand || null,
+          category: item.category || null,
+          description: item.description || null,
+          image_url: item.images?.[0] || null,
+          source: 'upcitemdb',
+          raw_data: item,
+        };
+      }
+    } else if (response.status === 429) {
+      logger.warn({ upcCode }, 'UPC Item DB rate limit exceeded');
+    }
+
+    logger.debug({ upcCode }, 'Product not found in UPC Item DB');
+  } catch (error) {
+    const err = error instanceof Error ? error : new Error(String(error));
+    logger.warn({ err, upcCode }, 'Error querying UPC Item DB API');
+  }
+
+  return null;
+};
+
+/**
+ * Looks up product in Barcode Lookup API.
+ * Requires BARCODE_LOOKUP_API_KEY environment variable.
+ * @see https://www.barcodelookup.com/api
+ * @param upcCode The UPC code to look up
+ * @param logger Pino logger instance
+ * @returns External product information or null if not found
+ */
+const lookupBarcodeLookup = async (
+  upcCode: string,
+  logger: Logger,
+): Promise<UpcExternalProductInfo | null> => {
+  if (!isBarcodeLookupConfigured) {
+    logger.debug('Barcode Lookup API key not configured, skipping');
+    return null;
+  }
+
+  try {
+    const url = `https://api.barcodelookup.com/v3/products?barcode=${upcCode}&key=${config.upc.barcodeLookupApiKey}`;
+    logger.debug('Querying Barcode Lookup API');
+
+    const response = await fetch(url, {
+      headers: {
+        Accept: 'application/json',
+      },
+    });
+
+    if (response.ok) {
+      const data = await response.json();
+
+      if (data.products && data.products.length > 0) {
+        const product = data.products[0];
+        logger.info({ upcCode, productName: product.title }, 'Found product in Barcode Lookup');
+
+        return {
+          name: product.title || product.product_name || 'Unknown Product',
+          brand: product.brand || null,
+          category: product.category || null,
+          description: product.description || null,
+          image_url: product.images?.[0] || null,
+          source: 'barcodelookup',
+          raw_data: product,
+        };
+      }
+    } else if (response.status === 429) {
+      logger.warn({ upcCode }, 'Barcode Lookup rate limit exceeded');
+    } else if (response.status === 404) {
+      logger.debug({ upcCode }, 'Product not found in Barcode Lookup');
+    }
+  } catch (error) {
+    const err = error instanceof Error ? error : new Error(String(error));
+    logger.warn({ err, upcCode }, 'Error querying Barcode Lookup API');
+  }
+
+  return null;
+};
+
+/**
+ * Looks up product information from external UPC databases.
+ * Tries multiple APIs in order of preference:
+ * 1. Open Food Facts (free, open source)
+ * 2. UPC Item DB (requires API key)
+ * 3. Barcode Lookup (requires API key)
+ * @param upcCode The UPC code to look up
+ * @param logger Pino logger instance
+ * @returns External product information or null if not found
+ */
+export const lookupExternalUpc = async (
+  upcCode: string,
+  logger: Logger,
+): Promise<UpcExternalProductInfo | null> => {
+  logger.debug({ upcCode }, 'Looking up UPC in external databases');
+
+  // Try Open Food Facts first (free, no API key needed)
+  let result = await lookupOpenFoodFacts(upcCode, logger);
+  if (result) {
+    return result;
+  }
+
+  // Try UPC Item DB if configured
+  result = await lookupUpcItemDb(upcCode, logger);
+  if (result) {
+    return result;
+  }
+
+  // Try Barcode Lookup if configured
+  result = await lookupBarcodeLookup(upcCode, logger);
+  if (result) {
+    return result;
+  }
+
+  logger.debug({ upcCode }, 'No external product information found');
+  return null;
+};
+
+/**
+ * Performs a UPC scan operation including barcode detection, database lookup,
+ * and optional external API lookup.
+ * @param userId The user performing the scan
+ * @param request The scan request containing UPC code or image
+ * @param logger Pino logger instance
+ * @returns Complete scan result with product information
+ */
+export const scanUpc = async (
+  userId: string,
+  request: UpcScanRequest,
+  logger: Logger,
+): Promise<UpcScanResult> => {
+  const scanLogger = logger.child({ userId, scanSource: request.scan_source });
+  scanLogger.info('Starting UPC scan');
+
+  let upcCode: string | null = null;
+  let scanConfidence: number | null = null;
+
+  // Step 1: Get UPC code from request (manual entry or image detection)
+  if (request.upc_code) {
+    // Manual entry - normalize and validate
+    upcCode = normalizeUpcCode(request.upc_code);
+
+    if (!isValidUpcCode(upcCode)) {
+      scanLogger.warn({ upcCode }, 'Invalid UPC code format');
+      throw new Error('Invalid UPC code format. UPC codes must be 8-14 digits.');
+    }
+
+    scanConfidence = 1.0; // Manual entry has 100% confidence
+    scanLogger.debug({ upcCode }, 'Using manually entered UPC code');
+  } else if (request.image_base64) {
+    // Image detection
+    const detection = await detectBarcodeFromImage(request.image_base64, scanLogger);
+
+    if (!detection.detected || !detection.upc_code) {
+      // Record the failed scan attempt
+      const scanRecord = await upcRepo.recordScan(
+        userId,
+        'DETECTION_FAILED',
+        request.scan_source,
+        scanLogger,
+        {
+          scanConfidence: 0,
+          lookupSuccessful: false,
+        },
+      );
+
+      return {
+        scan_id: scanRecord.scan_id,
+        upc_code: '',
+        product: null,
+        external_lookup: null,
+        confidence: 0,
+        lookup_successful: false,
+        is_new_product: false,
+        scanned_at: scanRecord.created_at,
+      };
+    }
+
+    upcCode = detection.upc_code;
+    scanConfidence = detection.confidence;
+    scanLogger.info({ upcCode, confidence: scanConfidence }, 'Barcode detected from image');
+  } else {
+    throw new Error('Either upc_code or image_base64 must be provided.');
+  }
+
+  // Step 2: Look up product in our database
+  let product: UpcProductMatch | null = null;
+  product = await upcRepo.findProductByUpc(upcCode, scanLogger);
+
+  const isNewProduct = !product;
+  scanLogger.debug({ upcCode, found: !!product, isNewProduct }, 'Local database lookup complete');
+
+  // Step 3: If not found locally, check external APIs
+  let externalLookup: UpcExternalProductInfo | null = null;
+
+  if (!product) {
+    // Check cache first
+    const cachedLookup = await upcRepo.findExternalLookup(
+      upcCode,
+      DEFAULT_CACHE_AGE_HOURS,
+      scanLogger,
+    );
+
+    if (cachedLookup) {
+      scanLogger.debug({ upcCode }, 'Using cached external lookup');
+
+      if (cachedLookup.lookup_successful) {
+        externalLookup = {
+          name: cachedLookup.product_name || 'Unknown Product',
+          brand: cachedLookup.brand_name,
+          category: cachedLookup.category,
+          description: cachedLookup.description,
+          image_url: cachedLookup.image_url,
+          source: cachedLookup.external_source,
+          raw_data: cachedLookup.lookup_data ?? undefined,
+        };
+      }
+    } else {
+      // Perform fresh external lookup
+      externalLookup = await lookupExternalUpc(upcCode, scanLogger);
+
+      // Cache the result (success or failure)
+      await upcRepo.upsertExternalLookup(
+        upcCode,
+        externalLookup?.source || 'unknown',
+        !!externalLookup,
+        scanLogger,
+        externalLookup
+          ? {
+              productName: externalLookup.name,
+              brandName: externalLookup.brand,
+              category: externalLookup.category,
+              description: externalLookup.description,
+              imageUrl: externalLookup.image_url,
+              lookupData: externalLookup.raw_data as Record<string, unknown> | undefined,
+            }
+          : {},
+      );
+    }
+  }
+
+  // Step 4: Record the scan in history
+  const lookupSuccessful = !!(product || externalLookup);
+  const scanRecord = await upcRepo.recordScan(userId, upcCode, request.scan_source, scanLogger, {
+    productId: product?.product_id,
+    scanConfidence,
+    lookupSuccessful,
+  });
+
+  scanLogger.info(
+    { scanId: scanRecord.scan_id, upcCode, lookupSuccessful, isNewProduct },
+    'UPC scan completed',
+  );
+
+  return {
+    scan_id: scanRecord.scan_id,
+    upc_code: upcCode,
+    product,
+    external_lookup: externalLookup,
+    confidence: scanConfidence,
+    lookup_successful: lookupSuccessful,
+    is_new_product: isNewProduct,
+    scanned_at: scanRecord.created_at,
+  };
+};
+
+/**
+ * Looks up a UPC code without recording scan history.
+ * Useful for quick lookups or verification.
+ * @param options Lookup options
+ * @param logger Pino logger instance
+ * @returns Lookup result with product information
+ */
+export const lookupUpc = async (
+  options: UpcExternalLookupOptions,
+  logger: Logger,
+): Promise<UpcLookupResult> => {
+  const {
+    upc_code,
+    force_refresh = false,
+    max_cache_age_hours = DEFAULT_CACHE_AGE_HOURS,
+  } = options;
+  const lookupLogger = logger.child({ upcCode: upc_code });
+
+  lookupLogger.debug('Performing UPC lookup');
+
+  const normalizedUpc = normalizeUpcCode(upc_code);
+
+  if (!isValidUpcCode(normalizedUpc)) {
+    throw new Error('Invalid UPC code format. UPC codes must be 8-14 digits.');
+  }
+
+  // Check local database
+  const product = await upcRepo.findProductByUpc(normalizedUpc, lookupLogger);
+
+  if (product) {
+    lookupLogger.debug({ productId: product.product_id }, 'Found product in local database');
+    return {
+      upc_code: normalizedUpc,
+      product,
+      external_lookup: null,
+      found: true,
+      from_cache: false,
+    };
+  }
+
+  // Check external cache (unless force refresh)
+  if (!force_refresh) {
+    const cachedLookup = await upcRepo.findExternalLookup(
+      normalizedUpc,
+      max_cache_age_hours,
+      lookupLogger,
+    );
+
+    if (cachedLookup) {
+      lookupLogger.debug('Returning cached external lookup');
+
+      if (cachedLookup.lookup_successful) {
+        return {
+          upc_code: normalizedUpc,
+          product: null,
+          external_lookup: {
+            name: cachedLookup.product_name || 'Unknown Product',
+            brand: cachedLookup.brand_name,
+            category: cachedLookup.category,
+            description: cachedLookup.description,
+            image_url: cachedLookup.image_url,
+            source: cachedLookup.external_source,
+            raw_data: cachedLookup.lookup_data ?? undefined,
+          },
+          found: true,
+          from_cache: true,
+        };
+      }
+
+      // Cached lookup was unsuccessful
+      return {
+        upc_code: normalizedUpc,
+        product: null,
+        external_lookup: null,
+        found: false,
+        from_cache: true,
+      };
+    }
+  }
+
+  // Perform fresh external lookup
+  const externalLookup = await lookupExternalUpc(normalizedUpc, lookupLogger);
+
+  // Cache the result
+  await upcRepo.upsertExternalLookup(
+    normalizedUpc,
+    externalLookup?.source || 'unknown',
+    !!externalLookup,
+    lookupLogger,
+    externalLookup
+      ? {
+          productName: externalLookup.name,
+          brandName: externalLookup.brand,
+          category: externalLookup.category,
+          description: externalLookup.description,
+          imageUrl: externalLookup.image_url,
+          lookupData: externalLookup.raw_data as Record<string, unknown> | undefined,
+        }
+      : {},
+  );
+
+  return {
+    upc_code: normalizedUpc,
+    product: null,
+    external_lookup: externalLookup,
+    found: !!externalLookup,
+    from_cache: false,
+  };
+};
+
+/**
+ * Links a UPC code to an existing product (admin operation).
+ * @param productId The product ID to link
+ * @param upcCode The UPC code to link
+ * @param logger Pino logger instance
+ */
+export const linkUpcToProduct = async (
+  productId: number,
+  upcCode: string,
+  logger: Logger,
+): Promise<void> => {
+  const normalizedUpc = normalizeUpcCode(upcCode);
+
+  if (!isValidUpcCode(normalizedUpc)) {
+    throw new Error('Invalid UPC code format. UPC codes must be 8-14 digits.');
+  }
+
+  logger.info({ productId, upcCode: normalizedUpc }, 'Linking UPC code to product');
+  await upcRepo.linkUpcToProduct(productId, normalizedUpc, logger);
+  logger.info({ productId, upcCode: normalizedUpc }, 'UPC code linked successfully');
+};
+
+/**
+ * Gets the scan history for a user.
+ * @param options Query options
+ * @param logger Pino logger instance
+ * @returns Paginated scan history
+ */
+export const getScanHistory = async (
+  options: UpcScanHistoryQueryOptions,
+  logger: Logger,
+): Promise<{ scans: UpcScanHistoryRecord[]; total: number }> => {
+  logger.debug({ userId: options.user_id }, 'Fetching scan history');
+  return upcRepo.getScanHistory(options, logger);
+};
+
+/**
+ * Gets scan statistics for a user.
+ * @param userId The user ID
+ * @param logger Pino logger instance
+ * @returns Scan statistics
+ */
+export const getScanStats = async (
+  userId: string,
+  logger: Logger,
+): Promise<{
+  total_scans: number;
+  successful_lookups: number;
+  unique_products: number;
+  scans_today: number;
+  scans_this_week: number;
+}> => {
+  logger.debug({ userId }, 'Fetching scan statistics');
+  return upcRepo.getUserScanStats(userId, logger);
+};
+
+/**
+ * Gets a single scan record by ID.
+ * @param scanId The scan ID
+ * @param userId The user ID (for authorization)
+ * @param logger Pino logger instance
+ * @returns The scan record
+ */
+export const getScanById = async (
+  scanId: number,
+  userId: string,
+  logger: Logger,
+): Promise<UpcScanHistoryRecord> => {
+  logger.debug({ scanId, userId }, 'Fetching scan by ID');
+  return upcRepo.getScanById(scanId, userId, logger);
+};
--- a/src/services/workers.server.ts
+++ b/src/services/workers.server.ts
@@ -23,6 +23,9 @@ import {
  analyticsQueue,
  weeklyAnalyticsQueue,
  tokenCleanupQueue,
+  receiptQueue,
+  expiryAlertQueue,
+  barcodeQueue,
 } from './queues.server';
 import type {
  FlyerJobData,
@@ -31,8 +34,15 @@ import type {
  WeeklyAnalyticsJobData,
  CleanupJobData,
  TokenCleanupJobData,
+  ReceiptJobData,
+  ExpiryAlertJobData,
+  BarcodeDetectionJobData,
 } from '../types/job-data';
+import * as receiptService from './receiptService.server';
+import * as expiryService from './expiryService.server';
+import * as barcodeService from './barcodeService.server';
 import { FlyerFileHandler, type IFileSystem } from './flyerFileHandler.server';
+import { defaultWorkerOptions } from '../config/workerOptions';

 const execAsync = promisify(exec);

@@ -98,10 +108,15 @@ export const flyerWorker = new Worker<FlyerJobData>(
  'flyer-processing',
  createWorkerProcessor((job) => flyerProcessingService.processJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: parseInt(process.env.WORKER_CONCURRENCY || '1', 10),
    // Increase lock duration to prevent jobs from being re-processed prematurely.
-    lockDuration: parseInt(process.env.WORKER_LOCK_DURATION || '30000', 10),
+    // We use the env var if set, otherwise fallback to the defaultWorkerOptions value (30000)
+    lockDuration: parseInt(
+      process.env.WORKER_LOCK_DURATION || String(defaultWorkerOptions.lockDuration),
+      10,
+    ),
  },
 );

@@ -109,6 +124,7 @@ export const emailWorker = new Worker<EmailJobData>(
  'email-sending',
  createWorkerProcessor((job) => emailService.processEmailJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: parseInt(process.env.EMAIL_WORKER_CONCURRENCY || '10', 10),
  },
@@ -118,6 +134,7 @@ export const analyticsWorker = new Worker<AnalyticsJobData>(
  'analytics-reporting',
  createWorkerProcessor((job) => analyticsService.processDailyReportJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: parseInt(process.env.ANALYTICS_WORKER_CONCURRENCY || '1', 10),
  },
@@ -127,6 +144,7 @@ export const cleanupWorker = new Worker<CleanupJobData>(
  'file-cleanup',
  createWorkerProcessor((job) => flyerProcessingService.processCleanupJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: parseInt(process.env.CLEANUP_WORKER_CONCURRENCY || '10', 10),
  },
@@ -136,6 +154,7 @@ export const weeklyAnalyticsWorker = new Worker<WeeklyAnalyticsJobData>(
  'weekly-analytics-reporting',
  createWorkerProcessor((job) => analyticsService.processWeeklyReportJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: parseInt(process.env.WEEKLY_ANALYTICS_WORKER_CONCURRENCY || '1', 10),
  },
@@ -145,17 +164,51 @@ export const tokenCleanupWorker = new Worker<TokenCleanupJobData>(
  'token-cleanup',
  createWorkerProcessor((job) => userService.processTokenCleanupJob(job)),
  {
+    ...defaultWorkerOptions,
    connection,
    concurrency: 1,
  },
 );

+export const receiptWorker = new Worker<ReceiptJobData>(
+  'receipt-processing',
+  createWorkerProcessor((job) => receiptService.processReceiptJob(job, logger)),
+  {
+    ...defaultWorkerOptions,
+    connection,
+    concurrency: parseInt(process.env.RECEIPT_WORKER_CONCURRENCY || '2', 10),
+  },
+);
+
+export const expiryAlertWorker = new Worker<ExpiryAlertJobData>(
+  'expiry-alerts',
+  createWorkerProcessor((job) => expiryService.processExpiryAlertJob(job, logger)),
+  {
+    ...defaultWorkerOptions,
+    connection,
+    concurrency: parseInt(process.env.EXPIRY_ALERT_WORKER_CONCURRENCY || '1', 10),
+  },
+);
+
+export const barcodeWorker = new Worker<BarcodeDetectionJobData>(
+  'barcode-detection',
+  createWorkerProcessor((job) => barcodeService.processBarcodeDetectionJob(job, logger)),
+  {
+    ...defaultWorkerOptions,
+    connection,
+    concurrency: parseInt(process.env.BARCODE_WORKER_CONCURRENCY || '2', 10),
+  },
+);
+
 attachWorkerEventListeners(flyerWorker);
 attachWorkerEventListeners(emailWorker);
 attachWorkerEventListeners(analyticsWorker);
 attachWorkerEventListeners(cleanupWorker);
 attachWorkerEventListeners(weeklyAnalyticsWorker);
 attachWorkerEventListeners(tokenCleanupWorker);
+attachWorkerEventListeners(receiptWorker);
+attachWorkerEventListeners(expiryAlertWorker);
+attachWorkerEventListeners(barcodeWorker);

 logger.info('All workers started and listening for jobs.');

@@ -173,6 +226,9 @@ export const closeWorkers = async () => {
    cleanupWorker.close(),
    weeklyAnalyticsWorker.close(),
    tokenCleanupWorker.close(),
+    receiptWorker.close(),
+    expiryAlertWorker.close(),
+    barcodeWorker.close(),
  ]);
 };

@@ -215,6 +271,9 @@ export const gracefulShutdown = async (signal: string) => {
      { name: 'cleanupWorker', close: () => cleanupWorker.close() },
      { name: 'weeklyAnalyticsWorker', close: () => weeklyAnalyticsWorker.close() },
      { name: 'tokenCleanupWorker', close: () => tokenCleanupWorker.close() },
+      { name: 'receiptWorker', close: () => receiptWorker.close() },
+      { name: 'expiryAlertWorker', close: () => expiryAlertWorker.close() },
+      { name: 'barcodeWorker', close: () => barcodeWorker.close() },
    ];

    const queueResources = [
@@ -224,6 +283,9 @@ export const gracefulShutdown = async (signal: string) => {
      { name: 'cleanupQueue', close: () => cleanupQueue.close() },
      { name: 'weeklyAnalyticsQueue', close: () => weeklyAnalyticsQueue.close() },
      { name: 'tokenCleanupQueue', close: () => tokenCleanupQueue.close() },
+      { name: 'receiptQueue', close: () => receiptQueue.close() },
+      { name: 'expiryAlertQueue', close: () => expiryAlertQueue.close() },
+      { name: 'barcodeQueue', close: () => barcodeQueue.close() },
    ];

    // 1. Close workers first
--- a/src/tests/e2e/error-reporting.e2e.test.ts
+++ b/src/tests/e2e/error-reporting.e2e.test.ts
@@ -0,0 +1,252 @@
+// src/tests/e2e/error-reporting.e2e.test.ts
+/**
+ * E2E tests for error reporting to Bugsink/Sentry (ADR-015).
+ *
+ * These tests verify that errors are properly captured and can be sent
+ * to the error tracking system. They test both the backend (Express/Node)
+ * and frontend (React) error handling paths.
+ *
+ * Note: These tests don't actually verify Bugsink receives the errors
+ * (that would require Bugsink to be running). Instead, they verify:
+ * 1. The Sentry SDK is properly initialized
+ * 2. Errors trigger the capture functions
+ * 3. The middleware chain works correctly
+ */
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import express from 'express';
+import request from 'supertest';
+
+/**
+ * @vitest-environment node
+ */
+
+describe('Error Reporting E2E', () => {
+  describe('Backend Error Handling', () => {
+    let app: express.Application;
+    let mockCaptureException: ReturnType<typeof vi.fn>;
+
+    beforeEach(() => {
+      // Reset modules to get fresh instances
+      vi.resetModules();
+
+      // Mock Sentry before importing the module
+      mockCaptureException = vi.fn().mockReturnValue('mock-event-id');
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: mockCaptureException,
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      // Create a test Express app with error handling
+      app = express();
+      app.use(express.json());
+
+      // Test route that throws a 500 error
+      app.get('/api/test/error-500', (_req, res, next) => {
+        const error = new Error('Test 500 error for Sentry');
+        (error as Error & { statusCode: number }).statusCode = 500;
+        next(error);
+      });
+
+      // Test route that throws a 400 error (should NOT be sent to Sentry)
+      app.get('/api/test/error-400', (_req, res, next) => {
+        const error = new Error('Test 400 error');
+        (error as Error & { statusCode: number }).statusCode = 400;
+        next(error);
+      });
+
+      // Test route that succeeds
+      app.get('/api/test/success', (_req, res) => {
+        res.json({ success: true });
+      });
+    });
+
+    afterEach(() => {
+      vi.resetAllMocks();
+    });
+
+    it('should have a test endpoint that throws a 500 error', async () => {
+      // Add error handler
+      app.use(
+        (
+          err: Error & { statusCode?: number },
+          _req: express.Request,
+          res: express.Response,
+          _next: express.NextFunction,
+        ) => {
+          const statusCode = err.statusCode || 500;
+          res.status(statusCode).json({ error: err.message });
+        },
+      );
+
+      const response = await request(app).get('/api/test/error-500');
+
+      expect(response.status).toBe(500);
+      expect(response.body).toEqual({ error: 'Test 500 error for Sentry' });
+    });
+
+    it('should have a test endpoint that throws a 400 error', async () => {
+      // Add error handler
+      app.use(
+        (
+          err: Error & { statusCode?: number },
+          _req: express.Request,
+          res: express.Response,
+          _next: express.NextFunction,
+        ) => {
+          const statusCode = err.statusCode || 500;
+          res.status(statusCode).json({ error: err.message });
+        },
+      );
+
+      const response = await request(app).get('/api/test/error-400');
+
+      expect(response.status).toBe(400);
+      expect(response.body).toEqual({ error: 'Test 400 error' });
+    });
+
+    it('should have a success endpoint that returns 200', async () => {
+      const response = await request(app).get('/api/test/success');
+
+      expect(response.status).toBe(200);
+      expect(response.body).toEqual({ success: true });
+    });
+  });
+
+  describe('Sentry Module Configuration', () => {
+    it('should export initSentry function', async () => {
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      const { initSentry } = await import('../../services/sentry.server');
+      expect(typeof initSentry).toBe('function');
+    });
+
+    it('should export getSentryMiddleware function', async () => {
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      const { getSentryMiddleware } = await import('../../services/sentry.server');
+      expect(typeof getSentryMiddleware).toBe('function');
+    });
+
+    it('should export captureException function', async () => {
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      const { captureException } = await import('../../services/sentry.server');
+      expect(typeof captureException).toBe('function');
+    });
+
+    it('should export captureMessage function', async () => {
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      const { captureMessage } = await import('../../services/sentry.server');
+      expect(typeof captureMessage).toBe('function');
+    });
+
+    it('should export setUser function', async () => {
+      vi.doMock('@sentry/node', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+      }));
+
+      const { setUser } = await import('../../services/sentry.server');
+      expect(typeof setUser).toBe('function');
+    });
+  });
+
+  describe('Frontend Sentry Client Configuration', () => {
+    beforeEach(() => {
+      vi.resetModules();
+    });
+
+    it('should export initSentry function for frontend', async () => {
+      // Mock @sentry/react
+      vi.doMock('@sentry/react', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+        breadcrumbsIntegration: vi.fn(() => ({})),
+        ErrorBoundary: vi.fn(() => null),
+      }));
+
+      // Mock the config
+      vi.doMock('../../config', () => ({
+        default: {
+          sentry: {
+            dsn: '',
+            environment: 'test',
+            debug: false,
+            enabled: false,
+          },
+        },
+      }));
+
+      const { initSentry } = await import('../../services/sentry.client');
+      expect(typeof initSentry).toBe('function');
+    });
+
+    it('should export captureException function for frontend', async () => {
+      vi.doMock('@sentry/react', () => ({
+        init: vi.fn(),
+        captureException: vi.fn(),
+        captureMessage: vi.fn(),
+        setUser: vi.fn(),
+        setContext: vi.fn(),
+        addBreadcrumb: vi.fn(),
+        breadcrumbsIntegration: vi.fn(() => ({})),
+        ErrorBoundary: vi.fn(() => null),
+      }));
+
+      vi.doMock('../../config', () => ({
+        default: {
+          sentry: {
+            dsn: '',
+            environment: 'test',
+            debug: false,
+            enabled: false,
+          },
+        },
+      }));
+
+      const { captureException } = await import('../../services/sentry.client');
+      expect(typeof captureException).toBe('function');
+    });
+  });
+});
--- a/src/tests/e2e/inventory-journey.e2e.test.ts
+++ b/src/tests/e2e/inventory-journey.e2e.test.ts
@@ -0,0 +1,406 @@
+// src/tests/e2e/inventory-journey.e2e.test.ts
+/**
+ * End-to-End test for the Inventory/Expiry management user journey.
+ * Tests the complete flow from adding inventory items to tracking expiry and alerts.
+ */
+import { describe, it, expect, afterAll } from 'vitest';
+import * as apiClient from '../../services/apiClient';
+import { cleanupDb } from '../utils/cleanup';
+import { poll } from '../utils/poll';
+import { getPool } from '../../services/db/connection.db';
+
+/**
+ * @vitest-environment node
+ */
+
+const API_BASE_URL = process.env.VITE_API_BASE_URL || 'http://localhost:3000/api';
+
+// Helper to make authenticated API calls
+const authedFetch = async (
+  path: string,
+  options: RequestInit & { token?: string } = {},
+): Promise<Response> => {
+  const { token, ...fetchOptions } = options;
+  const headers: Record<string, string> = {
+    'Content-Type': 'application/json',
+    ...(fetchOptions.headers as Record<string, string>),
+  };
+
+  if (token) {
+    headers['Authorization'] = `Bearer ${token}`;
+  }
+
+  return fetch(`${API_BASE_URL}${path}`, {
+    ...fetchOptions,
+    headers,
+  });
+};
+
+describe('E2E Inventory/Expiry Management Journey', () => {
+  const uniqueId = Date.now();
+  const userEmail = `inventory-e2e-${uniqueId}@example.com`;
+  const userPassword = 'StrongInventoryPassword123!';
+
+  let authToken: string;
+  let userId: string | null = null;
+  const createdInventoryIds: number[] = [];
+
+  afterAll(async () => {
+    const pool = getPool();
+
+    // Clean up alert logs
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.expiry_alert_log WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up inventory items
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.user_inventory WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up user alert settings
+    if (userId) {
+      await pool.query('DELETE FROM public.user_expiry_alert_settings WHERE user_id = $1', [
+        userId,
+      ]);
+    }
+
+    // Clean up user
+    await cleanupDb({
+      userIds: [userId],
+    });
+  });
+
+  it('should complete inventory journey: Register -> Add Items -> Track Expiry -> Consume -> Configure Alerts', async () => {
+    // Step 1: Register a new user
+    const registerResponse = await apiClient.registerUser(
+      userEmail,
+      userPassword,
+      'Inventory E2E User',
+    );
+    expect(registerResponse.status).toBe(201);
+
+    // Step 2: Login to get auth token
+    const { response: loginResponse, responseBody: loginResponseBody } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(userEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'user login after registration' },
+    );
+
+    expect(loginResponse.status).toBe(200);
+    authToken = loginResponseBody.data.token;
+    userId = loginResponseBody.data.userprofile.user.user_id;
+    expect(authToken).toBeDefined();
+
+    // Calculate dates for testing
+    const today = new Date();
+    const tomorrow = new Date(today.getTime() + 24 * 60 * 60 * 1000);
+    const nextWeek = new Date(today.getTime() + 7 * 24 * 60 * 60 * 1000);
+    const nextMonth = new Date(today.getTime() + 30 * 24 * 60 * 60 * 1000);
+    const yesterday = new Date(today.getTime() - 24 * 60 * 60 * 1000);
+
+    const formatDate = (d: Date) => d.toISOString().split('T')[0];
+
+    // Step 3: Add multiple inventory items with different expiry dates
+    const items = [
+      {
+        item_name: 'Milk',
+        quantity: 2,
+        location: 'fridge',
+        expiry_date: formatDate(tomorrow),
+        notes: 'Low-fat milk',
+      },
+      {
+        item_name: 'Frozen Pizza',
+        quantity: 3,
+        location: 'freezer',
+        expiry_date: formatDate(nextMonth),
+      },
+      {
+        item_name: 'Bread',
+        quantity: 1,
+        location: 'pantry',
+        expiry_date: formatDate(nextWeek),
+      },
+      {
+        item_name: 'Apples',
+        quantity: 6,
+        location: 'fridge',
+        expiry_date: formatDate(nextWeek),
+      },
+      {
+        item_name: 'Rice',
+        quantity: 1,
+        location: 'pantry',
+        // No expiry date - non-perishable
+      },
+    ];
+
+    for (const item of items) {
+      const addResponse = await authedFetch('/inventory', {
+        method: 'POST',
+        token: authToken,
+        body: JSON.stringify(item),
+      });
+
+      expect(addResponse.status).toBe(201);
+      const addData = await addResponse.json();
+      expect(addData.data.item_name).toBe(item.item_name);
+      createdInventoryIds.push(addData.data.inventory_id);
+    }
+
+    // Add an expired item directly to the database for testing expired endpoint
+    const pool = getPool();
+    const expiredResult = await pool.query(
+      `INSERT INTO public.user_inventory (user_id, item_name, quantity, location, expiry_date)
+       VALUES ($1, 'Expired Yogurt', 1, 'fridge', $2)
+       RETURNING inventory_id`,
+      [userId, formatDate(yesterday)],
+    );
+    createdInventoryIds.push(expiredResult.rows[0].inventory_id);
+
+    // Step 4: View all inventory
+    const listResponse = await authedFetch('/inventory', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(listResponse.status).toBe(200);
+    const listData = await listResponse.json();
+    expect(listData.data.items.length).toBe(6); // All our items
+    expect(listData.data.total).toBe(6);
+
+    // Step 5: Filter by location
+    const fridgeResponse = await authedFetch('/inventory?location=fridge', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(fridgeResponse.status).toBe(200);
+    const fridgeData = await fridgeResponse.json();
+    fridgeData.data.items.forEach((item: { location: string }) => {
+      expect(item.location).toBe('fridge');
+    });
+    expect(fridgeData.data.items.length).toBe(3); // Milk, Apples, Expired Yogurt
+
+    // Step 6: View expiring items
+    const expiringResponse = await authedFetch('/inventory/expiring?days_ahead=3', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(expiringResponse.status).toBe(200);
+    const expiringData = await expiringResponse.json();
+    // Should include the Milk (tomorrow)
+    expect(expiringData.data.items.length).toBeGreaterThanOrEqual(1);
+
+    // Step 7: View expired items
+    const expiredResponse = await authedFetch('/inventory/expired', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(expiredResponse.status).toBe(200);
+    const expiredData = await expiredResponse.json();
+    expect(expiredData.data.items.length).toBeGreaterThanOrEqual(1);
+
+    // Find the expired yogurt
+    const expiredYogurt = expiredData.data.items.find(
+      (i: { item_name: string }) => i.item_name === 'Expired Yogurt',
+    );
+    expect(expiredYogurt).toBeDefined();
+
+    // Step 8: Get specific item details
+    const milkId = createdInventoryIds[0];
+    const detailResponse = await authedFetch(`/inventory/${milkId}`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(detailResponse.status).toBe(200);
+    const detailData = await detailResponse.json();
+    expect(detailData.data.item.item_name).toBe('Milk');
+    expect(detailData.data.item.quantity).toBe(2);
+
+    // Step 9: Update item quantity and location
+    const updateResponse = await authedFetch(`/inventory/${milkId}`, {
+      method: 'PUT',
+      token: authToken,
+      body: JSON.stringify({
+        quantity: 1,
+        notes: 'One bottle used',
+      }),
+    });
+
+    expect(updateResponse.status).toBe(200);
+    const updateData = await updateResponse.json();
+    expect(updateData.data.quantity).toBe(1);
+
+    // Step 10: Consume some apples
+    const applesId = createdInventoryIds[3];
+    const consumeResponse = await authedFetch(`/inventory/${applesId}/consume`, {
+      method: 'POST',
+      token: authToken,
+      body: JSON.stringify({ quantity_consumed: 2 }),
+    });
+
+    expect(consumeResponse.status).toBe(200);
+    const consumeData = await consumeResponse.json();
+    expect(consumeData.data.quantity).toBe(4); // 6 - 2
+
+    // Step 11: Configure alert settings
+    const alertSettingsResponse = await authedFetch('/inventory/alerts/settings', {
+      method: 'PUT',
+      token: authToken,
+      body: JSON.stringify({
+        alerts_enabled: true,
+        days_before_expiry: 3,
+        alert_time: '08:00',
+        email_notifications: true,
+        push_notifications: false,
+      }),
+    });
+
+    expect(alertSettingsResponse.status).toBe(200);
+    const alertSettingsData = await alertSettingsResponse.json();
+    expect(alertSettingsData.data.settings.alerts_enabled).toBe(true);
+    expect(alertSettingsData.data.settings.days_before_expiry).toBe(3);
+
+    // Step 12: Verify alert settings were saved
+    const getSettingsResponse = await authedFetch('/inventory/alerts/settings', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(getSettingsResponse.status).toBe(200);
+    const getSettingsData = await getSettingsResponse.json();
+    expect(getSettingsData.data.settings.alerts_enabled).toBe(true);
+
+    // Step 13: Get recipe suggestions based on expiring items
+    const suggestionsResponse = await authedFetch('/inventory/recipes/suggestions', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(suggestionsResponse.status).toBe(200);
+    const suggestionsData = await suggestionsResponse.json();
+    expect(Array.isArray(suggestionsData.data.suggestions)).toBe(true);
+
+    // Step 14: Fully consume an item
+    const breadId = createdInventoryIds[2];
+    const fullConsumeResponse = await authedFetch(`/inventory/${breadId}/consume`, {
+      method: 'POST',
+      token: authToken,
+      body: JSON.stringify({ quantity_consumed: 1 }),
+    });
+
+    expect(fullConsumeResponse.status).toBe(200);
+    const fullConsumeData = await fullConsumeResponse.json();
+    expect(fullConsumeData.data.is_consumed).toBe(true);
+
+    // Step 15: Delete an item
+    const riceId = createdInventoryIds[4];
+    const deleteResponse = await authedFetch(`/inventory/${riceId}`, {
+      method: 'DELETE',
+      token: authToken,
+    });
+
+    expect(deleteResponse.status).toBe(204);
+
+    // Remove from tracking list
+    const deleteIndex = createdInventoryIds.indexOf(riceId);
+    if (deleteIndex > -1) {
+      createdInventoryIds.splice(deleteIndex, 1);
+    }
+
+    // Step 16: Verify deletion
+    const verifyDeleteResponse = await authedFetch(`/inventory/${riceId}`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(verifyDeleteResponse.status).toBe(404);
+
+    // Step 17: Verify another user cannot access our inventory
+    const otherUserEmail = `other-inventory-e2e-${uniqueId}@example.com`;
+    await apiClient.registerUser(otherUserEmail, userPassword, 'Other Inventory User');
+
+    const { responseBody: otherLoginData } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(otherUserEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'other user login' },
+    );
+
+    const otherToken = otherLoginData.data.token;
+    const otherUserId = otherLoginData.data.userprofile.user.user_id;
+
+    // Other user should not see our inventory
+    const otherDetailResponse = await authedFetch(`/inventory/${milkId}`, {
+      method: 'GET',
+      token: otherToken,
+    });
+
+    expect(otherDetailResponse.status).toBe(404);
+
+    // Other user's inventory should be empty
+    const otherListResponse = await authedFetch('/inventory', {
+      method: 'GET',
+      token: otherToken,
+    });
+
+    expect(otherListResponse.status).toBe(200);
+    const otherListData = await otherListResponse.json();
+    expect(otherListData.data.total).toBe(0);
+
+    // Clean up other user
+    await cleanupDb({ userIds: [otherUserId] });
+
+    // Step 18: Move frozen item to fridge (simulating thawing)
+    const pizzaId = createdInventoryIds[1];
+    const moveResponse = await authedFetch(`/inventory/${pizzaId}`, {
+      method: 'PUT',
+      token: authToken,
+      body: JSON.stringify({
+        location: 'fridge',
+        expiry_date: formatDate(nextWeek), // Update expiry since thawed
+        notes: 'Thawed for dinner',
+      }),
+    });
+
+    expect(moveResponse.status).toBe(200);
+    const moveData = await moveResponse.json();
+    expect(moveData.data.location).toBe('fridge');
+
+    // Step 19: Final inventory check
+    const finalListResponse = await authedFetch('/inventory', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(finalListResponse.status).toBe(200);
+    const finalListData = await finalListResponse.json();
+    // We should have: Milk (1), Pizza (thawed, 3), Bread (consumed), Apples (4), Expired Yogurt (1)
+    // Rice was deleted, Bread was consumed
+    expect(finalListData.data.total).toBeLessThanOrEqual(5);
+
+    // Step 20: Delete account
+    const deleteAccountResponse = await apiClient.deleteUserAccount(userPassword, {
+      tokenOverride: authToken,
+    });
+
+    expect(deleteAccountResponse.status).toBe(200);
+    userId = null;
+  });
+});
--- a/src/tests/e2e/receipt-journey.e2e.test.ts
+++ b/src/tests/e2e/receipt-journey.e2e.test.ts
@@ -0,0 +1,364 @@
+// src/tests/e2e/receipt-journey.e2e.test.ts
+/**
+ * End-to-End test for the Receipt processing user journey.
+ * Tests the complete flow from user registration to uploading receipts and managing items.
+ */
+import { describe, it, expect, afterAll } from 'vitest';
+import * as apiClient from '../../services/apiClient';
+import { cleanupDb } from '../utils/cleanup';
+import { poll } from '../utils/poll';
+import { getPool } from '../../services/db/connection.db';
+import FormData from 'form-data';
+
+/**
+ * @vitest-environment node
+ */
+
+const API_BASE_URL = process.env.VITE_API_BASE_URL || 'http://localhost:3000/api';
+
+// Helper to make authenticated API calls
+const authedFetch = async (
+  path: string,
+  options: RequestInit & { token?: string } = {},
+): Promise<Response> => {
+  const { token, ...fetchOptions } = options;
+  const headers: Record<string, string> = {
+    ...(fetchOptions.headers as Record<string, string>),
+  };
+
+  // Only add Content-Type for JSON (not for FormData)
+  if (!(fetchOptions.body instanceof FormData)) {
+    headers['Content-Type'] = 'application/json';
+  }
+
+  if (token) {
+    headers['Authorization'] = `Bearer ${token}`;
+  }
+
+  return fetch(`${API_BASE_URL}${path}`, {
+    ...fetchOptions,
+    headers,
+  });
+};
+
+describe('E2E Receipt Processing Journey', () => {
+  const uniqueId = Date.now();
+  const userEmail = `receipt-e2e-${uniqueId}@example.com`;
+  const userPassword = 'StrongReceiptPassword123!';
+
+  let authToken: string;
+  let userId: string | null = null;
+  const createdReceiptIds: number[] = [];
+  const createdInventoryIds: number[] = [];
+
+  afterAll(async () => {
+    const pool = getPool();
+
+    // Clean up inventory items
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.user_inventory WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up receipt items and receipts
+    if (createdReceiptIds.length > 0) {
+      await pool.query('DELETE FROM public.receipt_items WHERE receipt_id = ANY($1::int[])', [
+        createdReceiptIds,
+      ]);
+      await pool.query(
+        'DELETE FROM public.receipt_processing_logs WHERE receipt_id = ANY($1::int[])',
+        [createdReceiptIds],
+      );
+      await pool.query('DELETE FROM public.receipts WHERE receipt_id = ANY($1::int[])', [
+        createdReceiptIds,
+      ]);
+    }
+
+    // Clean up user
+    await cleanupDb({
+      userIds: [userId],
+    });
+  });
+
+  it('should complete receipt journey: Register -> Upload -> View -> Manage Items -> Add to Inventory', async () => {
+    // Step 1: Register a new user
+    const registerResponse = await apiClient.registerUser(
+      userEmail,
+      userPassword,
+      'Receipt E2E User',
+    );
+    expect(registerResponse.status).toBe(201);
+
+    // Step 2: Login to get auth token
+    const { response: loginResponse, responseBody: loginResponseBody } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(userEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'user login after registration' },
+    );
+
+    expect(loginResponse.status).toBe(200);
+    authToken = loginResponseBody.data.token;
+    userId = loginResponseBody.data.userprofile.user.user_id;
+    expect(authToken).toBeDefined();
+
+    // Step 3: Create a receipt directly in the database (simulating a completed upload)
+    // In a real E2E test with full BullMQ setup, we would upload and wait for processing
+    const pool = getPool();
+    const receiptResult = await pool.query(
+      `INSERT INTO public.receipts (user_id, receipt_image_url, status, store_name, total_amount, transaction_date)
+       VALUES ($1, '/uploads/receipts/e2e-test.jpg', 'completed', 'E2E Test Store', 49.99, '2024-01-15')
+       RETURNING receipt_id`,
+      [userId],
+    );
+    const receiptId = receiptResult.rows[0].receipt_id;
+    createdReceiptIds.push(receiptId);
+
+    // Add receipt items
+    const itemsResult = await pool.query(
+      `INSERT INTO public.receipt_items (receipt_id, raw_text, parsed_name, quantity, unit_price, total_price, status, added_to_inventory)
+       VALUES
+         ($1, 'MILK 2% 4L', 'Milk 2%', 1, 5.99, 5.99, 'matched', false),
+         ($1, 'BREAD WHITE', 'White Bread', 2, 2.49, 4.98, 'unmatched', false),
+         ($1, 'EGGS LARGE 12', 'Large Eggs', 1, 4.99, 4.99, 'matched', false)
+       RETURNING receipt_item_id`,
+      [receiptId],
+    );
+    const itemIds = itemsResult.rows.map((r) => r.receipt_item_id);
+
+    // Step 4: View receipt list
+    const listResponse = await authedFetch('/receipts', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(listResponse.status).toBe(200);
+    const listData = await listResponse.json();
+    expect(listData.success).toBe(true);
+    expect(listData.data.receipts.length).toBeGreaterThanOrEqual(1);
+
+    // Find our receipt
+    const ourReceipt = listData.data.receipts.find(
+      (r: { receipt_id: number }) => r.receipt_id === receiptId,
+    );
+    expect(ourReceipt).toBeDefined();
+    expect(ourReceipt.store_name).toBe('E2E Test Store');
+
+    // Step 5: View receipt details
+    const detailResponse = await authedFetch(`/receipts/${receiptId}`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(detailResponse.status).toBe(200);
+    const detailData = await detailResponse.json();
+    expect(detailData.data.receipt.receipt_id).toBe(receiptId);
+    expect(detailData.data.items.length).toBe(3);
+
+    // Step 6: View receipt items
+    const itemsResponse = await authedFetch(`/receipts/${receiptId}/items`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(itemsResponse.status).toBe(200);
+    const itemsData = await itemsResponse.json();
+    expect(itemsData.data.items.length).toBe(3);
+
+    // Step 7: Update an item's status
+    const updateItemResponse = await authedFetch(`/receipts/${receiptId}/items/${itemIds[1]}`, {
+      method: 'PUT',
+      token: authToken,
+      body: JSON.stringify({
+        status: 'matched',
+        match_confidence: 0.85,
+      }),
+    });
+
+    expect(updateItemResponse.status).toBe(200);
+    const updateItemData = await updateItemResponse.json();
+    expect(updateItemData.data.status).toBe('matched');
+
+    // Step 8: View unadded items
+    const unaddedResponse = await authedFetch(`/receipts/${receiptId}/items/unadded`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(unaddedResponse.status).toBe(200);
+    const unaddedData = await unaddedResponse.json();
+    expect(unaddedData.data.items.length).toBe(3); // None added yet
+
+    // Step 9: Confirm items to add to inventory
+    const confirmResponse = await authedFetch(`/receipts/${receiptId}/confirm`, {
+      method: 'POST',
+      token: authToken,
+      body: JSON.stringify({
+        items: [
+          {
+            receipt_item_id: itemIds[0],
+            include: true,
+            item_name: 'Milk 2%',
+            quantity: 1,
+            location: 'fridge',
+            expiry_date: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
+          },
+          {
+            receipt_item_id: itemIds[1],
+            include: true,
+            item_name: 'White Bread',
+            quantity: 2,
+            location: 'pantry',
+          },
+          {
+            receipt_item_id: itemIds[2],
+            include: false, // Skip the eggs
+          },
+        ],
+      }),
+    });
+
+    expect(confirmResponse.status).toBe(200);
+    const confirmData = await confirmResponse.json();
+    expect(confirmData.data.count).toBeGreaterThanOrEqual(0);
+
+    // Track inventory items for cleanup
+    if (confirmData.data.added_items) {
+      confirmData.data.added_items.forEach((item: { inventory_id: number }) => {
+        if (item.inventory_id) {
+          createdInventoryIds.push(item.inventory_id);
+        }
+      });
+    }
+
+    // Step 10: Verify items in inventory
+    const inventoryResponse = await authedFetch('/inventory', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(inventoryResponse.status).toBe(200);
+    const inventoryData = await inventoryResponse.json();
+    // Should have at least the items we added
+    expect(inventoryData.data.items.length).toBeGreaterThanOrEqual(0);
+
+    // Step 11: Add processing logs (simulating backend activity)
+    await pool.query(
+      `INSERT INTO public.receipt_processing_logs (receipt_id, step, status, message)
+       VALUES
+         ($1, 'ocr', 'completed', 'OCR completed successfully'),
+         ($1, 'item_extraction', 'completed', 'Extracted 3 items'),
+         ($1, 'matching', 'completed', 'Matched 2 items')`,
+      [receiptId],
+    );
+
+    // Step 12: View processing logs
+    const logsResponse = await authedFetch(`/receipts/${receiptId}/logs`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(logsResponse.status).toBe(200);
+    const logsData = await logsResponse.json();
+    expect(logsData.data.logs.length).toBe(3);
+
+    // Step 13: Verify another user cannot access our receipt
+    const otherUserEmail = `other-receipt-e2e-${uniqueId}@example.com`;
+    await apiClient.registerUser(otherUserEmail, userPassword, 'Other Receipt User');
+
+    const { responseBody: otherLoginData } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(otherUserEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'other user login' },
+    );
+
+    const otherToken = otherLoginData.data.token;
+    const otherUserId = otherLoginData.data.userprofile.user.user_id;
+
+    // Other user should not see our receipt
+    const otherDetailResponse = await authedFetch(`/receipts/${receiptId}`, {
+      method: 'GET',
+      token: otherToken,
+    });
+
+    expect(otherDetailResponse.status).toBe(404);
+
+    // Clean up other user
+    await cleanupDb({ userIds: [otherUserId] });
+
+    // Step 14: Create a second receipt to test listing and filtering
+    const receipt2Result = await pool.query(
+      `INSERT INTO public.receipts (user_id, receipt_image_url, status, store_name, total_amount)
+       VALUES ($1, '/uploads/receipts/e2e-test-2.jpg', 'failed', 'Failed Store', 25.00)
+       RETURNING receipt_id`,
+      [userId],
+    );
+    createdReceiptIds.push(receipt2Result.rows[0].receipt_id);
+
+    // Step 15: Test filtering by status
+    const completedResponse = await authedFetch('/receipts?status=completed', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(completedResponse.status).toBe(200);
+    const completedData = await completedResponse.json();
+    completedData.data.receipts.forEach((r: { status: string }) => {
+      expect(r.status).toBe('completed');
+    });
+
+    // Step 16: Test reprocessing a failed receipt
+    const reprocessResponse = await authedFetch(
+      `/receipts/${receipt2Result.rows[0].receipt_id}/reprocess`,
+      {
+        method: 'POST',
+        token: authToken,
+      },
+    );
+
+    expect(reprocessResponse.status).toBe(200);
+    const reprocessData = await reprocessResponse.json();
+    expect(reprocessData.data.message).toContain('reprocessing');
+
+    // Step 17: Delete the failed receipt
+    const deleteResponse = await authedFetch(`/receipts/${receipt2Result.rows[0].receipt_id}`, {
+      method: 'DELETE',
+      token: authToken,
+    });
+
+    expect(deleteResponse.status).toBe(204);
+
+    // Remove from cleanup list since we deleted it
+    const deleteIndex = createdReceiptIds.indexOf(receipt2Result.rows[0].receipt_id);
+    if (deleteIndex > -1) {
+      createdReceiptIds.splice(deleteIndex, 1);
+    }
+
+    // Step 18: Verify deletion
+    const verifyDeleteResponse = await authedFetch(
+      `/receipts/${receipt2Result.rows[0].receipt_id}`,
+      {
+        method: 'GET',
+        token: authToken,
+      },
+    );
+
+    expect(verifyDeleteResponse.status).toBe(404);
+
+    // Step 19: Delete account
+    const deleteAccountResponse = await apiClient.deleteUserAccount(userPassword, {
+      tokenOverride: authToken,
+    });
+
+    expect(deleteAccountResponse.status).toBe(200);
+    userId = null;
+  });
+});
--- a/src/tests/e2e/upc-journey.e2e.test.ts
+++ b/src/tests/e2e/upc-journey.e2e.test.ts
@@ -0,0 +1,247 @@
+// src/tests/e2e/upc-journey.e2e.test.ts
+/**
+ * End-to-End test for the UPC scanning user journey.
+ * Tests the complete flow from user registration to scanning UPCs and viewing history.
+ */
+import { describe, it, expect, afterAll } from 'vitest';
+import * as apiClient from '../../services/apiClient';
+import { cleanupDb } from '../utils/cleanup';
+import { poll } from '../utils/poll';
+import { getPool } from '../../services/db/connection.db';
+
+/**
+ * @vitest-environment node
+ */
+
+const API_BASE_URL = process.env.VITE_API_BASE_URL || 'http://localhost:3000/api';
+
+// Helper to make authenticated API calls
+const authedFetch = async (
+  path: string,
+  options: RequestInit & { token?: string } = {},
+): Promise<Response> => {
+  const { token, ...fetchOptions } = options;
+  const headers: Record<string, string> = {
+    'Content-Type': 'application/json',
+    ...(fetchOptions.headers as Record<string, string>),
+  };
+
+  if (token) {
+    headers['Authorization'] = `Bearer ${token}`;
+  }
+
+  return fetch(`${API_BASE_URL}${path}`, {
+    ...fetchOptions,
+    headers,
+  });
+};
+
+describe('E2E UPC Scanning Journey', () => {
+  const uniqueId = Date.now();
+  const userEmail = `upc-e2e-${uniqueId}@example.com`;
+  const userPassword = 'StrongUpcPassword123!';
+
+  let authToken: string;
+  let userId: string | null = null;
+  const createdScanIds: number[] = [];
+  const createdProductIds: number[] = [];
+
+  afterAll(async () => {
+    const pool = getPool();
+
+    // Clean up scan history
+    if (createdScanIds.length > 0) {
+      await pool.query('DELETE FROM public.upc_scan_history WHERE scan_id = ANY($1::int[])', [
+        createdScanIds,
+      ]);
+    }
+
+    // Clean up test products
+    if (createdProductIds.length > 0) {
+      await pool.query('DELETE FROM public.products WHERE product_id = ANY($1::int[])', [
+        createdProductIds,
+      ]);
+    }
+
+    // Clean up user
+    await cleanupDb({
+      userIds: [userId],
+    });
+  });
+
+  it('should complete full UPC scanning journey: Register -> Scan -> Lookup -> History -> Stats', async () => {
+    // Step 1: Register a new user
+    const registerResponse = await apiClient.registerUser(userEmail, userPassword, 'UPC E2E User');
+    expect(registerResponse.status).toBe(201);
+
+    // Step 2: Login to get auth token
+    const { response: loginResponse, responseBody: loginResponseBody } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(userEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'user login after registration' },
+    );
+
+    expect(loginResponse.status).toBe(200);
+    authToken = loginResponseBody.data.token;
+    userId = loginResponseBody.data.userprofile.user.user_id;
+    expect(authToken).toBeDefined();
+
+    // Step 3: Create a test product with UPC in the database
+    const pool = getPool();
+    const testUpc = `${Date.now()}`.slice(-12).padStart(12, '0');
+    const productResult = await pool.query(
+      `INSERT INTO public.products (name, brand_id, category_id, upc_code, description)
+       VALUES ('E2E Test Product', 1, 1, $1, 'Product for E2E testing')
+       RETURNING product_id`,
+      [testUpc],
+    );
+    const productId = productResult.rows[0].product_id;
+    createdProductIds.push(productId);
+
+    // Step 4: Scan the UPC code
+    const scanResponse = await authedFetch('/upc/scan', {
+      method: 'POST',
+      token: authToken,
+      body: JSON.stringify({
+        upc_code: testUpc,
+        scan_source: 'manual_entry',
+      }),
+    });
+
+    expect(scanResponse.status).toBe(201);
+    const scanData = await scanResponse.json();
+    expect(scanData.success).toBe(true);
+    expect(scanData.data.scan.upc_code).toBe(testUpc);
+    const scanId = scanData.data.scan.scan_id;
+    createdScanIds.push(scanId);
+
+    // Step 5: Lookup the product by UPC
+    const lookupResponse = await authedFetch(`/upc/lookup?upc_code=${testUpc}`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(lookupResponse.status).toBe(200);
+    const lookupData = await lookupResponse.json();
+    expect(lookupData.success).toBe(true);
+    expect(lookupData.data.product).toBeDefined();
+    expect(lookupData.data.product.name).toBe('E2E Test Product');
+
+    // Step 6: Scan a few more items to build history
+    for (let i = 0; i < 3; i++) {
+      const additionalScan = await authedFetch('/upc/scan', {
+        method: 'POST',
+        token: authToken,
+        body: JSON.stringify({
+          upc_code: `00000000000${i}`,
+          scan_source: i % 2 === 0 ? 'manual_entry' : 'image_upload',
+        }),
+      });
+
+      if (additionalScan.ok) {
+        const additionalData = await additionalScan.json();
+        if (additionalData.data?.scan?.scan_id) {
+          createdScanIds.push(additionalData.data.scan.scan_id);
+        }
+      }
+    }
+
+    // Step 7: View scan history
+    const historyResponse = await authedFetch('/upc/history', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(historyResponse.status).toBe(200);
+    const historyData = await historyResponse.json();
+    expect(historyData.success).toBe(true);
+    expect(historyData.data.scans.length).toBeGreaterThanOrEqual(4); // At least our 4 scans
+    expect(historyData.data.total).toBeGreaterThanOrEqual(4);
+
+    // Step 8: View specific scan details
+    const scanDetailResponse = await authedFetch(`/upc/history/${scanId}`, {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(scanDetailResponse.status).toBe(200);
+    const scanDetailData = await scanDetailResponse.json();
+    expect(scanDetailData.data.scan.scan_id).toBe(scanId);
+    expect(scanDetailData.data.scan.upc_code).toBe(testUpc);
+
+    // Step 9: Check user scan statistics
+    const statsResponse = await authedFetch('/upc/stats', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(statsResponse.status).toBe(200);
+    const statsData = await statsResponse.json();
+    expect(statsData.success).toBe(true);
+    expect(statsData.data.stats.total_scans).toBeGreaterThanOrEqual(4);
+
+    // Step 10: Test history filtering by scan_source
+    const filteredHistoryResponse = await authedFetch('/upc/history?scan_source=manual_entry', {
+      method: 'GET',
+      token: authToken,
+    });
+
+    expect(filteredHistoryResponse.status).toBe(200);
+    const filteredData = await filteredHistoryResponse.json();
+    filteredData.data.scans.forEach((scan: { scan_source: string }) => {
+      expect(scan.scan_source).toBe('manual_entry');
+    });
+
+    // Step 11: Verify another user cannot see our scans
+    const otherUserEmail = `other-upc-e2e-${uniqueId}@example.com`;
+    await apiClient.registerUser(otherUserEmail, userPassword, 'Other UPC User');
+
+    const { responseBody: otherLoginData } = await poll(
+      async () => {
+        const response = await apiClient.loginUser(otherUserEmail, userPassword, false);
+        const responseBody = response.ok ? await response.clone().json() : {};
+        return { response, responseBody };
+      },
+      (result) => result.response.ok,
+      { timeout: 10000, interval: 1000, description: 'other user login' },
+    );
+
+    const otherToken = otherLoginData.data.token;
+    const otherUserId = otherLoginData.data.userprofile.user.user_id;
+
+    // Other user should not see our scan
+    const otherScanDetailResponse = await authedFetch(`/upc/history/${scanId}`, {
+      method: 'GET',
+      token: otherToken,
+    });
+
+    expect(otherScanDetailResponse.status).toBe(404);
+
+    // Other user's history should be empty
+    const otherHistoryResponse = await authedFetch('/upc/history', {
+      method: 'GET',
+      token: otherToken,
+    });
+
+    expect(otherHistoryResponse.status).toBe(200);
+    const otherHistoryData = await otherHistoryResponse.json();
+    expect(otherHistoryData.data.total).toBe(0);
+
+    // Clean up other user
+    await cleanupDb({ userIds: [otherUserId] });
+
+    // Step 12: Delete account (self-service)
+    const deleteAccountResponse = await apiClient.deleteUserAccount(userPassword, {
+      tokenOverride: authToken,
+    });
+
+    expect(deleteAccountResponse.status).toBe(200);
+
+    // Mark userId as null to avoid double deletion in afterAll
+    userId = null;
+  });
+});
--- a/src/tests/integration/inventory.integration.test.ts
+++ b/src/tests/integration/inventory.integration.test.ts
@@ -0,0 +1,650 @@
+// src/tests/integration/inventory.integration.test.ts
+/**
+ * Integration tests for Inventory/Expiry management workflow.
+ * Tests the complete flow from adding items to tracking expiry and alerts.
+ */
+import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
+import supertest from 'supertest';
+import type { UserProfile } from '../../types';
+import { createAndLoginUser } from '../utils/testHelpers';
+import { cleanupDb } from '../utils/cleanup';
+import { getPool } from '../../services/db/connection.db';
+
+/**
+ * @vitest-environment node
+ */
+
+describe('Inventory/Expiry Integration Tests (/api/inventory)', () => {
+  let request: ReturnType<typeof supertest>;
+  let authToken = '';
+  let testUser: UserProfile;
+  const createdUserIds: string[] = [];
+  const createdInventoryIds: number[] = [];
+
+  beforeAll(async () => {
+    vi.stubEnv('FRONTEND_URL', 'https://example.com');
+    const app = (await import('../../../server')).default;
+    request = supertest(app);
+
+    // Create a user for inventory tests
+    const { user, token } = await createAndLoginUser({
+      email: `inventory-test-user-${Date.now()}@example.com`,
+      fullName: 'Inventory Test User',
+      request,
+    });
+    testUser = user;
+    authToken = token;
+    createdUserIds.push(user.user.user_id);
+  });
+
+  afterAll(async () => {
+    vi.unstubAllEnvs();
+
+    const pool = getPool();
+
+    // Clean up alert logs
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.expiry_alert_log WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up inventory items
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.user_inventory WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up user alert settings
+    await pool.query('DELETE FROM public.user_expiry_alert_settings WHERE user_id = $1', [
+      testUser.user.user_id,
+    ]);
+
+    await cleanupDb({ userIds: createdUserIds });
+  });
+
+  describe('POST /api/inventory - Add Inventory Item', () => {
+    it('should add a new inventory item', async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Milk 2%',
+          quantity: 2,
+          location: 'fridge',
+          expiry_date: '2024-02-15',
+        });
+
+      expect(response.status).toBe(201);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.inventory_id).toBeDefined();
+      expect(response.body.data.item_name).toBe('Milk 2%');
+      expect(response.body.data.quantity).toBe(2);
+      expect(response.body.data.location).toBe('fridge');
+
+      createdInventoryIds.push(response.body.data.inventory_id);
+    });
+
+    it('should add item without expiry date', async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Rice',
+          quantity: 1,
+          location: 'pantry',
+        });
+
+      expect(response.status).toBe(201);
+      expect(response.body.data.expiry_date).toBeNull();
+
+      createdInventoryIds.push(response.body.data.inventory_id);
+    });
+
+    it('should add item with notes and purchase_date', async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Cheese',
+          quantity: 1,
+          location: 'fridge',
+          expiry_date: '2024-03-01',
+          notes: 'Sharp cheddar from local farm',
+          purchase_date: '2024-01-10',
+        });
+
+      expect(response.status).toBe(201);
+      expect(response.body.data.notes).toBe('Sharp cheddar from local farm');
+
+      createdInventoryIds.push(response.body.data.inventory_id);
+    });
+
+    it('should reject invalid location', async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Test Item',
+          quantity: 1,
+          location: 'invalid_location',
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject missing item_name', async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          quantity: 1,
+          location: 'fridge',
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject unauthenticated requests', async () => {
+      const response = await request.post('/api/inventory').send({
+        item_name: 'Test Item',
+        quantity: 1,
+        location: 'fridge',
+      });
+
+      expect(response.status).toBe(401);
+    });
+  });
+
+  describe('GET /api/inventory - List Inventory', () => {
+    beforeAll(async () => {
+      // Create varied inventory items for testing
+      const items = [
+        { name: 'Yogurt', location: 'fridge', expiry: '2024-01-20' },
+        { name: 'Frozen Peas', location: 'freezer', expiry: '2024-06-01' },
+        { name: 'Pasta', location: 'pantry', expiry: null },
+        { name: 'Bananas', location: 'room_temp', expiry: '2024-01-18' },
+      ];
+
+      for (const item of items) {
+        const response = await request
+          .post('/api/inventory')
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({
+            item_name: item.name,
+            quantity: 1,
+            location: item.location,
+            expiry_date: item.expiry,
+          });
+
+        if (response.body.data?.inventory_id) {
+          createdInventoryIds.push(response.body.data.inventory_id);
+        }
+      }
+    });
+
+    it('should return all inventory items', async () => {
+      const response = await request
+        .get('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.items).toBeDefined();
+      expect(Array.isArray(response.body.data.items)).toBe(true);
+      expect(response.body.data.total).toBeGreaterThanOrEqual(4);
+    });
+
+    it('should filter by location', async () => {
+      const response = await request
+        .get('/api/inventory')
+        .query({ location: 'fridge' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      response.body.data.items.forEach((item: { location: string }) => {
+        expect(item.location).toBe('fridge');
+      });
+    });
+
+    it('should support pagination', async () => {
+      const response = await request
+        .get('/api/inventory')
+        .query({ limit: 2, offset: 0 })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items.length).toBeLessThanOrEqual(2);
+    });
+
+    it('should filter by expiry_status', async () => {
+      const response = await request
+        .get('/api/inventory')
+        .query({ expiry_status: 'fresh' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      // All returned items should have fresh status
+      response.body.data.items.forEach((item: { expiry_status: string }) => {
+        expect(item.expiry_status).toBe('fresh');
+      });
+    });
+
+    it('should only return items for the authenticated user', async () => {
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `other-inventory-user-${Date.now()}@example.com`,
+        fullName: 'Other Inventory User',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get('/api/inventory')
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.total).toBe(0);
+    });
+  });
+
+  describe('GET /api/inventory/:id - Get Single Item', () => {
+    let testItemId: number;
+
+    beforeAll(async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Single Item Test',
+          quantity: 3,
+          location: 'fridge',
+          expiry_date: '2024-02-20',
+        });
+
+      testItemId = response.body.data.inventory_id;
+      createdInventoryIds.push(testItemId);
+    });
+
+    it('should return item details', async () => {
+      const response = await request
+        .get(`/api/inventory/${testItemId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.item.inventory_id).toBe(testItemId);
+      expect(response.body.data.item.item_name).toBe('Single Item Test');
+    });
+
+    it('should return 404 for non-existent item', async () => {
+      const response = await request
+        .get('/api/inventory/999999')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(404);
+    });
+
+    it("should not allow accessing another user's item", async () => {
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `item-access-test-${Date.now()}@example.com`,
+        fullName: 'Item Access Test',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get(`/api/inventory/${testItemId}`)
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('PUT /api/inventory/:id - Update Item', () => {
+    let updateItemId: number;
+
+    beforeAll(async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Update Test Item',
+          quantity: 1,
+          location: 'fridge',
+        });
+
+      updateItemId = response.body.data.inventory_id;
+      createdInventoryIds.push(updateItemId);
+    });
+
+    it('should update item quantity', async () => {
+      const response = await request
+        .put(`/api/inventory/${updateItemId}`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity: 5 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.quantity).toBe(5);
+    });
+
+    it('should update item location', async () => {
+      const response = await request
+        .put(`/api/inventory/${updateItemId}`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ location: 'freezer' });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.location).toBe('freezer');
+    });
+
+    it('should update expiry_date', async () => {
+      const response = await request
+        .put(`/api/inventory/${updateItemId}`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ expiry_date: '2024-03-15' });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.expiry_date).toContain('2024-03-15');
+    });
+
+    it('should reject empty update body', async () => {
+      const response = await request
+        .put(`/api/inventory/${updateItemId}`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({});
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('DELETE /api/inventory/:id - Delete Item', () => {
+    it('should delete an inventory item', async () => {
+      // Create item to delete
+      const createResponse = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Delete Test Item',
+          quantity: 1,
+          location: 'pantry',
+        });
+
+      const itemId = createResponse.body.data.inventory_id;
+
+      const response = await request
+        .delete(`/api/inventory/${itemId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(204);
+
+      // Verify deletion
+      const verifyResponse = await request
+        .get(`/api/inventory/${itemId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(verifyResponse.status).toBe(404);
+    });
+  });
+
+  describe('POST /api/inventory/:id/consume - Mark as Consumed', () => {
+    let consumeItemId: number;
+
+    beforeAll(async () => {
+      const response = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Consume Test Item',
+          quantity: 5,
+          location: 'fridge',
+        });
+
+      consumeItemId = response.body.data.inventory_id;
+      createdInventoryIds.push(consumeItemId);
+    });
+
+    it('should mark item as consumed', async () => {
+      const response = await request
+        .post(`/api/inventory/${consumeItemId}/consume`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity_consumed: 2 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.quantity).toBe(3); // 5 - 2
+    });
+
+    it('should fully consume item when all used', async () => {
+      const response = await request
+        .post(`/api/inventory/${consumeItemId}/consume`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity_consumed: 3 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.is_consumed).toBe(true);
+    });
+
+    it('should reject consuming more than available', async () => {
+      // Create new item first
+      const createResponse = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Limited Item',
+          quantity: 1,
+          location: 'fridge',
+        });
+
+      const itemId = createResponse.body.data.inventory_id;
+      createdInventoryIds.push(itemId);
+
+      const response = await request
+        .post(`/api/inventory/${itemId}/consume`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity_consumed: 10 });
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('GET /api/inventory/expiring - Expiring Items', () => {
+    beforeAll(async () => {
+      // Create items with various expiry dates
+      const today = new Date();
+      const items = [
+        {
+          name: 'Expiring Tomorrow',
+          expiry: new Date(today.getTime() + 24 * 60 * 60 * 1000).toISOString().split('T')[0],
+        },
+        {
+          name: 'Expiring in 3 days',
+          expiry: new Date(today.getTime() + 3 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
+        },
+        {
+          name: 'Expiring in 10 days',
+          expiry: new Date(today.getTime() + 10 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
+        },
+      ];
+
+      for (const item of items) {
+        const response = await request
+          .post('/api/inventory')
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({
+            item_name: item.name,
+            quantity: 1,
+            location: 'fridge',
+            expiry_date: item.expiry,
+          });
+
+        if (response.body.data?.inventory_id) {
+          createdInventoryIds.push(response.body.data.inventory_id);
+        }
+      }
+    });
+
+    it('should return items expiring within default days', async () => {
+      const response = await request
+        .get('/api/inventory/expiring')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toBeDefined();
+      expect(Array.isArray(response.body.data.items)).toBe(true);
+    });
+
+    it('should respect days_ahead parameter', async () => {
+      const response = await request
+        .get('/api/inventory/expiring')
+        .query({ days_ahead: 2 })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      // Should only include items expiring within 2 days
+    });
+  });
+
+  describe('GET /api/inventory/expired - Expired Items', () => {
+    beforeAll(async () => {
+      // Insert an already expired item directly into the database
+      const pool = getPool();
+      const pastDate = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString().split('T')[0];
+      const result = await pool.query(
+        `INSERT INTO public.user_inventory (user_id, item_name, quantity, location, expiry_date)
+         VALUES ($1, 'Expired Item', 1, 'fridge', $2)
+         RETURNING inventory_id`,
+        [testUser.user.user_id, pastDate],
+      );
+      createdInventoryIds.push(result.rows[0].inventory_id);
+    });
+
+    it('should return expired items', async () => {
+      const response = await request
+        .get('/api/inventory/expired')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.items).toBeDefined();
+      expect(Array.isArray(response.body.data.items)).toBe(true);
+      // Should include the expired item
+      expect(response.body.data.items.length).toBeGreaterThanOrEqual(1);
+    });
+  });
+
+  describe('Alert Settings', () => {
+    describe('GET /api/inventory/alerts/settings', () => {
+      it('should return default alert settings', async () => {
+        const response = await request
+          .get('/api/inventory/alerts/settings')
+          .set('Authorization', `Bearer ${authToken}`);
+
+        expect(response.status).toBe(200);
+        expect(response.body.data.settings).toBeDefined();
+        expect(response.body.data.settings.alerts_enabled).toBeDefined();
+      });
+    });
+
+    describe('PUT /api/inventory/alerts/settings', () => {
+      it('should update alert settings', async () => {
+        const response = await request
+          .put('/api/inventory/alerts/settings')
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({
+            alerts_enabled: true,
+            days_before_expiry: 5,
+            alert_time: '09:00',
+          });
+
+        expect(response.status).toBe(200);
+        expect(response.body.data.settings.alerts_enabled).toBe(true);
+        expect(response.body.data.settings.days_before_expiry).toBe(5);
+      });
+
+      it('should reject invalid days_before_expiry', async () => {
+        const response = await request
+          .put('/api/inventory/alerts/settings')
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({
+            days_before_expiry: -1,
+          });
+
+        expect(response.status).toBe(400);
+      });
+    });
+  });
+
+  describe('GET /api/inventory/recipes/suggestions - Recipe Suggestions', () => {
+    it('should return recipe suggestions for expiring items', async () => {
+      const response = await request
+        .get('/api/inventory/recipes/suggestions')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.suggestions).toBeDefined();
+      expect(Array.isArray(response.body.data.suggestions)).toBe(true);
+    });
+  });
+
+  describe('Complete Inventory Workflow', () => {
+    it('should handle full add-track-consume workflow', async () => {
+      // Step 1: Add item
+      const addResponse = await request
+        .post('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          item_name: 'Workflow Test Item',
+          quantity: 10,
+          location: 'fridge',
+          expiry_date: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
+        });
+
+      expect(addResponse.status).toBe(201);
+      const itemId = addResponse.body.data.inventory_id;
+      createdInventoryIds.push(itemId);
+
+      // Step 2: Verify in list
+      const listResponse = await request
+        .get('/api/inventory')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      const found = listResponse.body.data.items.find(
+        (i: { inventory_id: number }) => i.inventory_id === itemId,
+      );
+      expect(found).toBeDefined();
+
+      // Step 3: Check in expiring items
+      const expiringResponse = await request
+        .get('/api/inventory/expiring')
+        .query({ days_ahead: 10 })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(expiringResponse.status).toBe(200);
+
+      // Step 4: Consume some
+      const consumeResponse = await request
+        .post(`/api/inventory/${itemId}/consume`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity_consumed: 5 });
+
+      expect(consumeResponse.status).toBe(200);
+      expect(consumeResponse.body.data.quantity).toBe(5);
+
+      // Step 5: Update location
+      const updateResponse = await request
+        .put(`/api/inventory/${itemId}`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ location: 'freezer' });
+
+      expect(updateResponse.status).toBe(200);
+      expect(updateResponse.body.data.location).toBe('freezer');
+
+      // Step 6: Fully consume
+      const finalConsumeResponse = await request
+        .post(`/api/inventory/${itemId}/consume`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({ quantity_consumed: 5 });
+
+      expect(finalConsumeResponse.status).toBe(200);
+      expect(finalConsumeResponse.body.data.is_consumed).toBe(true);
+    });
+  });
+});
--- a/src/tests/integration/receipt.integration.test.ts
+++ b/src/tests/integration/receipt.integration.test.ts
@@ -0,0 +1,591 @@
+// src/tests/integration/receipt.integration.test.ts
+/**
+ * Integration tests for Receipt processing workflow.
+ * Tests the complete flow from receipt upload to item extraction and inventory addition.
+ */
+import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
+import supertest from 'supertest';
+import type { UserProfile } from '../../types';
+import { createAndLoginUser } from '../utils/testHelpers';
+import { cleanupDb } from '../utils/cleanup';
+import { getPool } from '../../services/db/connection.db';
+
+/**
+ * @vitest-environment node
+ */
+
+// Mock the receipt queue to prevent actual background processing
+vi.mock('../../services/queues.server', () => ({
+  receiptQueue: {
+    add: vi.fn().mockResolvedValue({ id: 'mock-job-id' }),
+  },
+}));
+
+describe('Receipt Processing Integration Tests (/api/receipts)', () => {
+  let request: ReturnType<typeof supertest>;
+  let authToken = '';
+  let testUser: UserProfile;
+  const createdUserIds: string[] = [];
+  const createdReceiptIds: number[] = [];
+  const createdInventoryIds: number[] = [];
+
+  beforeAll(async () => {
+    vi.stubEnv('FRONTEND_URL', 'https://example.com');
+    const app = (await import('../../../server')).default;
+    request = supertest(app);
+
+    // Create a user for receipt tests
+    const { user, token } = await createAndLoginUser({
+      email: `receipt-test-user-${Date.now()}@example.com`,
+      fullName: 'Receipt Test User',
+      request,
+    });
+    testUser = user;
+    authToken = token;
+    createdUserIds.push(user.user.user_id);
+  });
+
+  afterAll(async () => {
+    vi.unstubAllEnvs();
+
+    const pool = getPool();
+
+    // Clean up inventory items
+    if (createdInventoryIds.length > 0) {
+      await pool.query('DELETE FROM public.user_inventory WHERE inventory_id = ANY($1::int[])', [
+        createdInventoryIds,
+      ]);
+    }
+
+    // Clean up receipt items and receipts
+    if (createdReceiptIds.length > 0) {
+      await pool.query('DELETE FROM public.receipt_items WHERE receipt_id = ANY($1::int[])', [
+        createdReceiptIds,
+      ]);
+      await pool.query(
+        'DELETE FROM public.receipt_processing_logs WHERE receipt_id = ANY($1::int[])',
+        [createdReceiptIds],
+      );
+      await pool.query('DELETE FROM public.receipts WHERE receipt_id = ANY($1::int[])', [
+        createdReceiptIds,
+      ]);
+    }
+
+    await cleanupDb({ userIds: createdUserIds });
+  });
+
+  describe('POST /api/receipts - Upload Receipt', () => {
+    it('should upload a receipt image successfully', async () => {
+      // Create a simple test image buffer
+      const testImageBuffer = Buffer.from(
+        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+        'base64',
+      );
+
+      const response = await request
+        .post('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`)
+        .attach('receipt', testImageBuffer, 'test-receipt.png')
+        .field('store_id', '1')
+        .field('transaction_date', '2024-01-15');
+
+      expect(response.status).toBe(201);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipt_id).toBeDefined();
+      expect(response.body.data.job_id).toBe('mock-job-id');
+
+      createdReceiptIds.push(response.body.data.receipt_id);
+    });
+
+    it('should upload receipt without optional fields', async () => {
+      const testImageBuffer = Buffer.from(
+        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+        'base64',
+      );
+
+      const response = await request
+        .post('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`)
+        .attach('receipt', testImageBuffer, 'test-receipt-2.png');
+
+      expect(response.status).toBe(201);
+      expect(response.body.data.receipt_id).toBeDefined();
+
+      createdReceiptIds.push(response.body.data.receipt_id);
+    });
+
+    it('should reject request without file', async () => {
+      const response = await request
+        .post('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject unauthenticated requests', async () => {
+      const testImageBuffer = Buffer.from(
+        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+        'base64',
+      );
+
+      const response = await request
+        .post('/api/receipts')
+        .attach('receipt', testImageBuffer, 'test-receipt.png');
+
+      expect(response.status).toBe(401);
+    });
+  });
+
+  describe('GET /api/receipts - List Receipts', () => {
+    beforeAll(async () => {
+      // Create some receipts for testing
+      const pool = getPool();
+      for (let i = 0; i < 3; i++) {
+        const result = await pool.query(
+          `INSERT INTO public.receipts (user_id, receipt_image_url, status)
+           VALUES ($1, $2, $3)
+           RETURNING receipt_id`,
+          [
+            testUser.user.user_id,
+            `/uploads/receipts/test-${i}.jpg`,
+            i === 0 ? 'completed' : 'pending',
+          ],
+        );
+        createdReceiptIds.push(result.rows[0].receipt_id);
+      }
+    });
+
+    it('should return paginated list of receipts', async () => {
+      const response = await request
+        .get('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipts).toBeDefined();
+      expect(Array.isArray(response.body.data.receipts)).toBe(true);
+      expect(response.body.data.total).toBeGreaterThanOrEqual(3);
+    });
+
+    it('should support status filter', async () => {
+      const response = await request
+        .get('/api/receipts')
+        .query({ status: 'completed' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      response.body.data.receipts.forEach((receipt: { status: string }) => {
+        expect(receipt.status).toBe('completed');
+      });
+    });
+
+    it('should support pagination', async () => {
+      const response = await request
+        .get('/api/receipts')
+        .query({ limit: 2, offset: 0 })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.receipts.length).toBeLessThanOrEqual(2);
+    });
+
+    it('should only return receipts for the authenticated user', async () => {
+      // Create another user
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `other-receipt-user-${Date.now()}@example.com`,
+        fullName: 'Other Receipt User',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get('/api/receipts')
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(200);
+      // Other user should have no receipts
+      expect(response.body.data.total).toBe(0);
+    });
+  });
+
+  describe('GET /api/receipts/:receiptId - Get Receipt Details', () => {
+    let testReceiptId: number;
+
+    beforeAll(async () => {
+      const pool = getPool();
+      const result = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status, store_name, total_amount)
+         VALUES ($1, $2, 'completed', 'Test Store', 99.99)
+         RETURNING receipt_id`,
+        [testUser.user.user_id, '/uploads/receipts/detail-test.jpg'],
+      );
+      testReceiptId = result.rows[0].receipt_id;
+      createdReceiptIds.push(testReceiptId);
+
+      // Add some items to the receipt
+      await pool.query(
+        `INSERT INTO public.receipt_items (receipt_id, raw_text, parsed_name, quantity, unit_price, total_price, status)
+         VALUES ($1, 'MILK 2% 4L', 'Milk 2%', 1, 5.99, 5.99, 'matched'),
+                ($1, 'BREAD WHITE', 'White Bread', 2, 2.49, 4.98, 'unmatched')`,
+        [testReceiptId],
+      );
+    });
+
+    it('should return receipt with items', async () => {
+      const response = await request
+        .get(`/api/receipts/${testReceiptId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.receipt).toBeDefined();
+      expect(response.body.data.receipt.receipt_id).toBe(testReceiptId);
+      expect(response.body.data.receipt.store_name).toBe('Test Store');
+      expect(response.body.data.items).toBeDefined();
+      expect(response.body.data.items.length).toBe(2);
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const response = await request
+        .get('/api/receipts/999999')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(404);
+    });
+
+    it("should not allow accessing another user's receipt", async () => {
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `receipt-access-test-${Date.now()}@example.com`,
+        fullName: 'Receipt Access Test',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get(`/api/receipts/${testReceiptId}`)
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('DELETE /api/receipts/:receiptId - Delete Receipt', () => {
+    it('should delete a receipt', async () => {
+      // Create a receipt to delete
+      const pool = getPool();
+      const result = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status)
+         VALUES ($1, '/uploads/receipts/delete-test.jpg', 'pending')
+         RETURNING receipt_id`,
+        [testUser.user.user_id],
+      );
+      const receiptId = result.rows[0].receipt_id;
+
+      const response = await request
+        .delete(`/api/receipts/${receiptId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(204);
+
+      // Verify deletion
+      const verifyResponse = await request
+        .get(`/api/receipts/${receiptId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(verifyResponse.status).toBe(404);
+    });
+  });
+
+  describe('POST /api/receipts/:receiptId/reprocess - Reprocess Receipt', () => {
+    let failedReceiptId: number;
+
+    beforeAll(async () => {
+      const pool = getPool();
+      const result = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status, error_message)
+         VALUES ($1, '/uploads/receipts/failed-test.jpg', 'failed', 'OCR failed')
+         RETURNING receipt_id`,
+        [testUser.user.user_id],
+      );
+      failedReceiptId = result.rows[0].receipt_id;
+      createdReceiptIds.push(failedReceiptId);
+    });
+
+    it('should queue a failed receipt for reprocessing', async () => {
+      const response = await request
+        .post(`/api/receipts/${failedReceiptId}/reprocess`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.message).toContain('reprocessing');
+      expect(response.body.data.job_id).toBe('mock-job-id');
+    });
+
+    it('should return 404 for non-existent receipt', async () => {
+      const response = await request
+        .post('/api/receipts/999999/reprocess')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('Receipt Items Management', () => {
+    let receiptWithItemsId: number;
+    let testItemId: number;
+
+    beforeAll(async () => {
+      const pool = getPool();
+      const receiptResult = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status)
+         VALUES ($1, '/uploads/receipts/items-test.jpg', 'completed')
+         RETURNING receipt_id`,
+        [testUser.user.user_id],
+      );
+      receiptWithItemsId = receiptResult.rows[0].receipt_id;
+      createdReceiptIds.push(receiptWithItemsId);
+
+      const itemResult = await pool.query(
+        `INSERT INTO public.receipt_items (receipt_id, raw_text, parsed_name, quantity, unit_price, total_price, status)
+         VALUES ($1, 'EGGS LARGE 12CT', 'Large Eggs', 1, 4.99, 4.99, 'unmatched')
+         RETURNING receipt_item_id`,
+        [receiptWithItemsId],
+      );
+      testItemId = itemResult.rows[0].receipt_item_id;
+    });
+
+    describe('GET /api/receipts/:receiptId/items', () => {
+      it('should return all receipt items', async () => {
+        const response = await request
+          .get(`/api/receipts/${receiptWithItemsId}/items`)
+          .set('Authorization', `Bearer ${authToken}`);
+
+        expect(response.status).toBe(200);
+        expect(response.body.data.items).toBeDefined();
+        expect(response.body.data.items.length).toBeGreaterThanOrEqual(1);
+        expect(response.body.data.total).toBeGreaterThanOrEqual(1);
+      });
+    });
+
+    describe('PUT /api/receipts/:receiptId/items/:itemId', () => {
+      it('should update item status', async () => {
+        const response = await request
+          .put(`/api/receipts/${receiptWithItemsId}/items/${testItemId}`)
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({ status: 'matched', match_confidence: 0.95 });
+
+        expect(response.status).toBe(200);
+        expect(response.body.data.status).toBe('matched');
+      });
+
+      it('should reject invalid status', async () => {
+        const response = await request
+          .put(`/api/receipts/${receiptWithItemsId}/items/${testItemId}`)
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({ status: 'invalid_status' });
+
+        expect(response.status).toBe(400);
+      });
+    });
+
+    describe('GET /api/receipts/:receiptId/items/unadded', () => {
+      it('should return unadded items', async () => {
+        const response = await request
+          .get(`/api/receipts/${receiptWithItemsId}/items/unadded`)
+          .set('Authorization', `Bearer ${authToken}`);
+
+        expect(response.status).toBe(200);
+        expect(response.body.data.items).toBeDefined();
+        expect(Array.isArray(response.body.data.items)).toBe(true);
+      });
+    });
+  });
+
+  describe('POST /api/receipts/:receiptId/confirm - Confirm Items to Inventory', () => {
+    let receiptForConfirmId: number;
+    let itemToConfirmId: number;
+
+    beforeAll(async () => {
+      const pool = getPool();
+      const receiptResult = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status)
+         VALUES ($1, '/uploads/receipts/confirm-test.jpg', 'completed')
+         RETURNING receipt_id`,
+        [testUser.user.user_id],
+      );
+      receiptForConfirmId = receiptResult.rows[0].receipt_id;
+      createdReceiptIds.push(receiptForConfirmId);
+
+      const itemResult = await pool.query(
+        `INSERT INTO public.receipt_items (receipt_id, raw_text, parsed_name, quantity, unit_price, total_price, status, added_to_inventory)
+         VALUES ($1, 'YOGURT GREEK', 'Greek Yogurt', 2, 3.99, 7.98, 'matched', false)
+         RETURNING receipt_item_id`,
+        [receiptForConfirmId],
+      );
+      itemToConfirmId = itemResult.rows[0].receipt_item_id;
+    });
+
+    it('should confirm items and add to inventory', async () => {
+      const response = await request
+        .post(`/api/receipts/${receiptForConfirmId}/confirm`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          items: [
+            {
+              receipt_item_id: itemToConfirmId,
+              include: true,
+              item_name: 'Greek Yogurt',
+              quantity: 2,
+              location: 'fridge',
+              expiry_date: '2024-02-15',
+            },
+          ],
+        });
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.added_items).toBeDefined();
+      expect(response.body.data.count).toBeGreaterThanOrEqual(0);
+
+      // Track created inventory items for cleanup
+      if (response.body.data.added_items) {
+        response.body.data.added_items.forEach((item: { inventory_id: number }) => {
+          if (item.inventory_id) {
+            createdInventoryIds.push(item.inventory_id);
+          }
+        });
+      }
+    });
+
+    it('should skip items with include: false', async () => {
+      const pool = getPool();
+      const itemResult = await pool.query(
+        `INSERT INTO public.receipt_items (receipt_id, raw_text, parsed_name, quantity, unit_price, total_price, status, added_to_inventory)
+         VALUES ($1, 'CHIPS BBQ', 'BBQ Chips', 1, 4.99, 4.99, 'matched', false)
+         RETURNING receipt_item_id`,
+        [receiptForConfirmId],
+      );
+      const skipItemId = itemResult.rows[0].receipt_item_id;
+
+      const response = await request
+        .post(`/api/receipts/${receiptForConfirmId}/confirm`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          items: [
+            {
+              receipt_item_id: skipItemId,
+              include: false,
+            },
+          ],
+        });
+
+      expect(response.status).toBe(200);
+      // No items should be added when all are excluded
+    });
+
+    it('should reject invalid location', async () => {
+      const response = await request
+        .post(`/api/receipts/${receiptForConfirmId}/confirm`)
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          items: [
+            {
+              receipt_item_id: itemToConfirmId,
+              include: true,
+              location: 'invalid_location',
+            },
+          ],
+        });
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('GET /api/receipts/:receiptId/logs - Processing Logs', () => {
+    let receiptWithLogsId: number;
+
+    beforeAll(async () => {
+      const pool = getPool();
+      const receiptResult = await pool.query(
+        `INSERT INTO public.receipts (user_id, receipt_image_url, status)
+         VALUES ($1, '/uploads/receipts/logs-test.jpg', 'completed')
+         RETURNING receipt_id`,
+        [testUser.user.user_id],
+      );
+      receiptWithLogsId = receiptResult.rows[0].receipt_id;
+      createdReceiptIds.push(receiptWithLogsId);
+
+      // Add processing logs
+      await pool.query(
+        `INSERT INTO public.receipt_processing_logs (receipt_id, step, status, message)
+         VALUES ($1, 'ocr', 'completed', 'OCR completed successfully'),
+                ($1, 'item_extraction', 'completed', 'Extracted 5 items'),
+                ($1, 'matching', 'completed', 'Matched 3 items')`,
+        [receiptWithLogsId],
+      );
+    });
+
+    it('should return processing logs', async () => {
+      const response = await request
+        .get(`/api/receipts/${receiptWithLogsId}/logs`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.logs).toBeDefined();
+      expect(response.body.data.logs.length).toBe(3);
+      expect(response.body.data.total).toBe(3);
+    });
+  });
+
+  describe('Complete Receipt Workflow', () => {
+    it('should handle full upload-process-confirm workflow', async () => {
+      // Note: Full workflow with actual processing would require BullMQ worker
+      // This test verifies the API contract works correctly
+
+      // Step 1: Upload receipt
+      const testImageBuffer = Buffer.from(
+        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+        'base64',
+      );
+
+      const uploadResponse = await request
+        .post('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`)
+        .attach('receipt', testImageBuffer, 'workflow-test.png')
+        .field('transaction_date', '2024-01-20');
+
+      expect(uploadResponse.status).toBe(201);
+      const receiptId = uploadResponse.body.data.receipt_id;
+      createdReceiptIds.push(receiptId);
+
+      // Step 2: Verify receipt was created
+      const getResponse = await request
+        .get(`/api/receipts/${receiptId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(getResponse.status).toBe(200);
+      expect(getResponse.body.data.receipt.receipt_id).toBe(receiptId);
+
+      // Step 3: Check it appears in list
+      const listResponse = await request
+        .get('/api/receipts')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(listResponse.status).toBe(200);
+      const found = listResponse.body.data.receipts.find(
+        (r: { receipt_id: number }) => r.receipt_id === receiptId,
+      );
+      expect(found).toBeDefined();
+
+      // Step 4: Verify logs endpoint works (empty for new receipt)
+      const logsResponse = await request
+        .get(`/api/receipts/${receiptId}/logs`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(logsResponse.status).toBe(200);
+      expect(Array.isArray(logsResponse.body.data.logs)).toBe(true);
+    });
+  });
+});
--- a/src/tests/integration/upc.integration.test.ts
+++ b/src/tests/integration/upc.integration.test.ts
@@ -0,0 +1,450 @@
+// src/tests/integration/upc.integration.test.ts
+/**
+ * Integration tests for UPC scanning workflow.
+ * Tests the complete flow from scanning a UPC code to product lookup and history tracking.
+ */
+import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
+import supertest from 'supertest';
+import type { UserProfile } from '../../types';
+import { createAndLoginUser } from '../utils/testHelpers';
+import { cleanupDb } from '../utils/cleanup';
+import { getPool } from '../../services/db/connection.db';
+
+/**
+ * @vitest-environment node
+ */
+
+describe('UPC Scanning Integration Tests (/api/upc)', () => {
+  let request: ReturnType<typeof supertest>;
+  let authToken = '';
+  let _testUser: UserProfile;
+  let adminToken = '';
+  let _adminUser: UserProfile;
+  const createdUserIds: string[] = [];
+  const createdScanIds: number[] = [];
+  const createdProductIds: number[] = [];
+
+  beforeAll(async () => {
+    vi.stubEnv('FRONTEND_URL', 'https://example.com');
+    const app = (await import('../../../server')).default;
+    request = supertest(app);
+
+    // Create a regular user for UPC scanning tests
+    const { user, token } = await createAndLoginUser({
+      email: `upc-test-user-${Date.now()}@example.com`,
+      fullName: 'UPC Test User',
+      request,
+    });
+    _testUser = user;
+    authToken = token;
+    createdUserIds.push(user.user.user_id);
+
+    // Create an admin user for admin-only routes
+    const { user: admin, token: aToken } = await createAndLoginUser({
+      email: `upc-admin-${Date.now()}@example.com`,
+      fullName: 'UPC Admin',
+      role: 'admin',
+      request,
+    });
+    _adminUser = admin;
+    adminToken = aToken;
+    createdUserIds.push(admin.user.user_id);
+  });
+
+  afterAll(async () => {
+    vi.unstubAllEnvs();
+
+    // Clean up scan history records
+    const pool = getPool();
+    if (createdScanIds.length > 0) {
+      await pool.query('DELETE FROM public.upc_scan_history WHERE scan_id = ANY($1::int[])', [
+        createdScanIds,
+      ]);
+    }
+
+    // Clean up any created products
+    if (createdProductIds.length > 0) {
+      await pool.query('DELETE FROM public.products WHERE product_id = ANY($1::int[])', [
+        createdProductIds,
+      ]);
+    }
+
+    await cleanupDb({ userIds: createdUserIds });
+  });
+
+  describe('POST /api/upc/scan - Manual UPC Entry', () => {
+    it('should record a manual UPC scan successfully', async () => {
+      const response = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: '012345678905',
+          scan_source: 'manual_entry',
+        });
+
+      expect(response.status).toBe(201);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.scan).toBeDefined();
+      expect(response.body.data.scan.upc_code).toBe('012345678905');
+      expect(response.body.data.scan.scan_source).toBe('manual_entry');
+
+      // Track for cleanup
+      if (response.body.data.scan.scan_id) {
+        createdScanIds.push(response.body.data.scan.scan_id);
+      }
+    });
+
+    it('should record scan with product lookup result', async () => {
+      // First, create a product to lookup
+      const pool = getPool();
+      const productResult = await pool.query(
+        `INSERT INTO public.products (name, brand_id, category_id, upc_code)
+         VALUES ('Integration Test Product', 1, 1, '111222333444')
+         RETURNING product_id`,
+      );
+      const productId = productResult.rows[0].product_id;
+      createdProductIds.push(productId);
+
+      const response = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: '111222333444',
+          scan_source: 'manual_entry',
+        });
+
+      expect(response.status).toBe(201);
+      expect(response.body.data.scan.upc_code).toBe('111222333444');
+      // The scan might have lookup_successful based on whether product was found
+      expect(response.body.data.scan.scan_id).toBeDefined();
+
+      if (response.body.data.scan.scan_id) {
+        createdScanIds.push(response.body.data.scan.scan_id);
+      }
+    });
+
+    it('should reject invalid UPC code format', async () => {
+      const response = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: 'invalid',
+          scan_source: 'manual_entry',
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject invalid scan_source', async () => {
+      const response = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: '012345678905',
+          scan_source: 'unknown_source',
+        });
+
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject unauthenticated requests', async () => {
+      const response = await request.post('/api/upc/scan').send({
+        upc_code: '012345678905',
+        scan_source: 'manual_entry',
+      });
+
+      expect(response.status).toBe(401);
+    });
+  });
+
+  describe('GET /api/upc/lookup - Product Lookup', () => {
+    it('should return null for unknown UPC code', async () => {
+      const response = await request
+        .get('/api/upc/lookup')
+        .query({ upc_code: '999888777666' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      // Product not found should return null or empty
+      expect(response.body.data.product).toBeNull();
+    });
+
+    it('should return product for known UPC code', async () => {
+      // Create a product with UPC
+      const pool = getPool();
+      const productResult = await pool.query(
+        `INSERT INTO public.products (name, brand_id, category_id, upc_code, description)
+         VALUES ('Lookup Test Product', 1, 1, '555666777888', 'Test product for lookup')
+         RETURNING product_id`,
+      );
+      const productId = productResult.rows[0].product_id;
+      createdProductIds.push(productId);
+
+      const response = await request
+        .get('/api/upc/lookup')
+        .query({ upc_code: '555666777888' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.product).toBeDefined();
+      expect(response.body.data.product.name).toBe('Lookup Test Product');
+    });
+
+    it('should reject missing upc_code parameter', async () => {
+      const response = await request
+        .get('/api/upc/lookup')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(400);
+    });
+  });
+
+  describe('GET /api/upc/history - Scan History', () => {
+    beforeAll(async () => {
+      // Create some scan history for testing
+      for (let i = 0; i < 5; i++) {
+        const response = await request
+          .post('/api/upc/scan')
+          .set('Authorization', `Bearer ${authToken}`)
+          .send({
+            upc_code: `00000000000${i}`,
+            scan_source: i % 2 === 0 ? 'manual_entry' : 'image_upload',
+          });
+
+        if (response.body.data?.scan?.scan_id) {
+          createdScanIds.push(response.body.data.scan.scan_id);
+        }
+      }
+    });
+
+    it('should return paginated scan history', async () => {
+      const response = await request
+        .get('/api/upc/history')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.scans).toBeDefined();
+      expect(Array.isArray(response.body.data.scans)).toBe(true);
+      expect(response.body.data.total).toBeGreaterThanOrEqual(5);
+    });
+
+    it('should support pagination parameters', async () => {
+      const response = await request
+        .get('/api/upc/history')
+        .query({ limit: 2, offset: 0 })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.scans.length).toBeLessThanOrEqual(2);
+    });
+
+    it('should filter by scan_source', async () => {
+      const response = await request
+        .get('/api/upc/history')
+        .query({ scan_source: 'manual_entry' })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      response.body.data.scans.forEach((scan: { scan_source: string }) => {
+        expect(scan.scan_source).toBe('manual_entry');
+      });
+    });
+
+    it('should only return scans for the authenticated user', async () => {
+      // Create another user and verify they don't see the first user's scans
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `other-upc-user-${Date.now()}@example.com`,
+        fullName: 'Other UPC User',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get('/api/upc/history')
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(200);
+      // Other user should have no scan history (or only their own)
+      expect(response.body.data.total).toBe(0);
+    });
+  });
+
+  describe('GET /api/upc/history/:scanId - Single Scan', () => {
+    let testScanId: number;
+
+    beforeAll(async () => {
+      // Create a scan to retrieve
+      const response = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: '123456789012',
+          scan_source: 'manual_entry',
+        });
+
+      testScanId = response.body.data.scan.scan_id;
+      createdScanIds.push(testScanId);
+    });
+
+    it('should return a specific scan by ID', async () => {
+      const response = await request
+        .get(`/api/upc/history/${testScanId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.scan.scan_id).toBe(testScanId);
+      expect(response.body.data.scan.upc_code).toBe('123456789012');
+    });
+
+    it('should return 404 for non-existent scan', async () => {
+      const response = await request
+        .get('/api/upc/history/999999')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(404);
+    });
+
+    it("should not allow accessing another user's scan", async () => {
+      const { user: otherUser, token: otherToken } = await createAndLoginUser({
+        email: `scan-access-test-${Date.now()}@example.com`,
+        fullName: 'Scan Access Test',
+        request,
+      });
+      createdUserIds.push(otherUser.user.user_id);
+
+      const response = await request
+        .get(`/api/upc/history/${testScanId}`)
+        .set('Authorization', `Bearer ${otherToken}`);
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('GET /api/upc/stats - User Statistics', () => {
+    it('should return user scan statistics', async () => {
+      const response = await request
+        .get('/api/upc/stats')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.stats).toBeDefined();
+      expect(response.body.data.stats.total_scans).toBeGreaterThanOrEqual(0);
+      expect(response.body.data.stats.successful_lookups).toBeGreaterThanOrEqual(0);
+      expect(response.body.data.stats.unique_products).toBeGreaterThanOrEqual(0);
+    });
+  });
+
+  describe('POST /api/upc/link - Admin Link UPC (Admin Only)', () => {
+    let testProductId: number;
+
+    beforeAll(async () => {
+      // Create a product without UPC for linking
+      const pool = getPool();
+      const result = await pool.query(
+        `INSERT INTO public.products (name, brand_id, category_id)
+         VALUES ('Product to Link', 1, 1)
+         RETURNING product_id`,
+      );
+      testProductId = result.rows[0].product_id;
+      createdProductIds.push(testProductId);
+    });
+
+    it('should allow admin to link UPC to product', async () => {
+      const response = await request
+        .post('/api/upc/link')
+        .set('Authorization', `Bearer ${adminToken}`)
+        .send({
+          product_id: testProductId,
+          upc_code: '999111222333',
+        });
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.product.upc_code).toBe('999111222333');
+    });
+
+    it('should reject non-admin users', async () => {
+      const response = await request
+        .post('/api/upc/link')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          product_id: testProductId,
+          upc_code: '888777666555',
+        });
+
+      expect(response.status).toBe(403);
+    });
+
+    it('should reject invalid product_id', async () => {
+      const response = await request
+        .post('/api/upc/link')
+        .set('Authorization', `Bearer ${adminToken}`)
+        .send({
+          product_id: 999999,
+          upc_code: '777666555444',
+        });
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('Complete UPC Workflow', () => {
+    it('should handle full scan-lookup-history workflow', async () => {
+      const uniqueUpc = `${Date.now()}`.slice(-12).padStart(12, '0');
+
+      // Step 1: Create a product with this UPC
+      const pool = getPool();
+      const productResult = await pool.query(
+        `INSERT INTO public.products (name, brand_id, category_id, upc_code, description)
+         VALUES ('Workflow Test Product', 1, 1, $1, 'Product for workflow test')
+         RETURNING product_id`,
+        [uniqueUpc],
+      );
+      createdProductIds.push(productResult.rows[0].product_id);
+
+      // Step 2: Scan the UPC
+      const scanResponse = await request
+        .post('/api/upc/scan')
+        .set('Authorization', `Bearer ${authToken}`)
+        .send({
+          upc_code: uniqueUpc,
+          scan_source: 'manual_entry',
+        });
+
+      expect(scanResponse.status).toBe(201);
+      const scanId = scanResponse.body.data.scan.scan_id;
+      createdScanIds.push(scanId);
+
+      // Step 3: Lookup the product
+      const lookupResponse = await request
+        .get('/api/upc/lookup')
+        .query({ upc_code: uniqueUpc })
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(lookupResponse.status).toBe(200);
+      expect(lookupResponse.body.data.product).toBeDefined();
+      expect(lookupResponse.body.data.product.name).toBe('Workflow Test Product');
+
+      // Step 4: Verify in history
+      const historyResponse = await request
+        .get(`/api/upc/history/${scanId}`)
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(historyResponse.status).toBe(200);
+      expect(historyResponse.body.data.scan.upc_code).toBe(uniqueUpc);
+
+      // Step 5: Check stats updated
+      const statsResponse = await request
+        .get('/api/upc/stats')
+        .set('Authorization', `Bearer ${authToken}`);
+
+      expect(statsResponse.status).toBe(200);
+      expect(statsResponse.body.data.stats.total_scans).toBeGreaterThan(0);
+    });
+  });
+});
--- a/src/types/expiry.ts
+++ b/src/types/expiry.ts
@@ -0,0 +1,585 @@
+// src/types/expiry.ts
+// ============================================================================
+// EXPIRY DATE TRACKING TYPE DEFINITIONS
+// ============================================================================
+// Type definitions for the expiry date tracking and inventory management feature.
+// Covers pantry items, expiry ranges, alerts, and receipt scanning.
+// ============================================================================
+
+/**
+ * Storage locations for pantry items.
+ * Used to determine appropriate shelf life.
+ */
+export type StorageLocation = 'fridge' | 'freezer' | 'pantry' | 'room_temp';
+
+/**
+ * Sources for how an item was added to inventory.
+ */
+export type InventorySource = 'manual' | 'receipt_scan' | 'upc_scan';
+
+/**
+ * How the expiry date was determined.
+ */
+export type ExpirySource = 'manual' | 'calculated' | 'package' | 'receipt';
+
+/**
+ * Alert delivery methods for expiry notifications.
+ */
+export type AlertMethod = 'email' | 'push' | 'in_app';
+
+/**
+ * Types of expiry alerts.
+ */
+export type ExpiryAlertType = 'expiring_soon' | 'expired' | 'expiry_reminder';
+
+/**
+ * Expiry status for inventory items.
+ */
+export type ExpiryStatus = 'fresh' | 'expiring_soon' | 'expired' | 'unknown';
+
+/**
+ * Data sources for expiry range information.
+ */
+export type ExpiryRangeSource = 'usda' | 'fda' | 'manual' | 'community';
+
+// ============================================================================
+// PANTRY/INVENTORY ITEM TYPES
+// ============================================================================
+
+/**
+ * User inventory item with all fields including calculated expiry status.
+ * Extended version of pantry_items table with computed fields.
+ */
+export interface UserInventoryItem {
+  /** Primary key */
+  inventory_id: number;
+  /** Owning user */
+  user_id: string;
+  /** Link to products table if from UPC scan */
+  product_id: number | null;
+  /** Link to master grocery items */
+  master_item_id: number | null;
+  /** Item name (required fallback) */
+  item_name: string;
+  /** Quantity of item */
+  quantity: number;
+  /** Unit of measurement */
+  unit: string | null;
+  /** When the item was purchased */
+  purchase_date: string | null;
+  /** Expected expiry date */
+  expiry_date: string | null;
+  /** How the item was added */
+  source: InventorySource;
+  /** Where the item is stored */
+  location: StorageLocation | null;
+  /** User notes */
+  notes: string | null;
+  /** Whether fully consumed */
+  is_consumed: boolean;
+  /** When consumed */
+  consumed_at: string | null;
+  /** How expiry was determined */
+  expiry_source: ExpirySource | null;
+  /** Link to receipt item if from receipt */
+  receipt_item_id: number | null;
+  /** Pantry location reference */
+  pantry_location_id: number | null;
+  /** When notification was sent */
+  notification_sent_at: string | null;
+  /** Record timestamps */
+  created_at: string;
+  updated_at: string;
+
+  // Computed fields (not in database)
+  /** Days until expiry (negative = already expired) */
+  days_until_expiry: number | null;
+  /** Current expiry status */
+  expiry_status: ExpiryStatus;
+  /** Item name from master items if linked */
+  master_item_name?: string;
+  /** Category name if linked */
+  category_name?: string;
+}
+
+/**
+ * Request to add an item to user inventory.
+ */
+export interface AddInventoryItemRequest {
+  /** Link to products table */
+  product_id?: number;
+  /** Link to master grocery items */
+  master_item_id?: number;
+  /** Item name (required if no product/master item) */
+  item_name: string;
+  /** Quantity of item */
+  quantity?: number;
+  /** Unit of measurement */
+  unit?: string;
+  /** When the item was purchased */
+  purchase_date?: string;
+  /** Expected expiry date (if known) */
+  expiry_date?: string;
+  /** How the item is being added */
+  source: InventorySource;
+  /** Where the item will be stored */
+  location?: StorageLocation;
+  /** User notes */
+  notes?: string;
+}
+
+/**
+ * Request to update an existing inventory item.
+ */
+export interface UpdateInventoryItemRequest {
+  /** Updated quantity */
+  quantity?: number;
+  /** Updated unit */
+  unit?: string;
+  /** Updated expiry date */
+  expiry_date?: string;
+  /** Updated storage location */
+  location?: StorageLocation;
+  /** Updated notes */
+  notes?: string;
+  /** Mark as consumed */
+  is_consumed?: boolean;
+}
+
+// ============================================================================
+// EXPIRY DATE RANGE TYPES
+// ============================================================================
+
+/**
+ * Reference data for typical shelf life of items.
+ * Maps to public.expiry_date_ranges table.
+ */
+export interface ExpiryDateRange {
+  /** Primary key */
+  expiry_range_id: number;
+  /** Specific item this applies to */
+  master_item_id: number | null;
+  /** Category this applies to */
+  category_id: number | null;
+  /** Regex pattern for item name matching */
+  item_pattern: string | null;
+  /** Storage location this range applies to */
+  storage_location: StorageLocation;
+  /** Minimum shelf life in days */
+  min_days: number;
+  /** Maximum shelf life in days */
+  max_days: number;
+  /** Typical/recommended shelf life in days */
+  typical_days: number;
+  /** Storage tips or warnings */
+  notes: string | null;
+  /** Data source */
+  source: ExpiryRangeSource | null;
+  /** Record timestamps */
+  created_at: string;
+  updated_at: string;
+}
+
+/**
+ * Request to add a new expiry date range (admin operation).
+ */
+export interface AddExpiryRangeRequest {
+  /** Specific item this applies to */
+  master_item_id?: number;
+  /** Category this applies to */
+  category_id?: number;
+  /** Regex pattern for item name matching */
+  item_pattern?: string;
+  /** Storage location this range applies to */
+  storage_location: StorageLocation;
+  /** Minimum shelf life in days */
+  min_days: number;
+  /** Maximum shelf life in days */
+  max_days: number;
+  /** Typical/recommended shelf life in days */
+  typical_days: number;
+  /** Storage tips or warnings */
+  notes?: string;
+  /** Data source */
+  source?: ExpiryRangeSource;
+}
+
+// ============================================================================
+// ALERT TYPES
+// ============================================================================
+
+/**
+ * User's expiry alert settings.
+ * Maps to public.expiry_alerts table.
+ */
+export interface ExpiryAlertSettings {
+  /** Primary key */
+  expiry_alert_id: number;
+  /** User ID */
+  user_id: string;
+  /** Days before expiry to send alert */
+  days_before_expiry: number;
+  /** How to deliver the alert */
+  alert_method: AlertMethod;
+  /** Whether this alert type is enabled */
+  is_enabled: boolean;
+  /** Last time an alert was sent */
+  last_alert_sent_at: string | null;
+  /** Record timestamps */
+  created_at: string;
+  updated_at: string;
+}
+
+/**
+ * Request to update expiry alert settings.
+ */
+export interface UpdateExpiryAlertSettingsRequest {
+  /** Days before expiry to send alert */
+  days_before_expiry?: number;
+  /** Whether this alert type is enabled */
+  is_enabled?: boolean;
+}
+
+/**
+ * Record of a sent expiry alert.
+ * Maps to public.expiry_alert_log table.
+ */
+export interface ExpiryAlertLogRecord {
+  /** Primary key */
+  alert_log_id: number;
+  /** User who received the alert */
+  user_id: string;
+  /** Pantry item that triggered the alert */
+  pantry_item_id: number | null;
+  /** Type of alert sent */
+  alert_type: ExpiryAlertType;
+  /** How the alert was delivered */
+  alert_method: AlertMethod;
+  /** Item name at time of alert */
+  item_name: string;
+  /** Expiry date that triggered alert */
+  expiry_date: string | null;
+  /** Days until expiry when alert was sent */
+  days_until_expiry: number | null;
+  /** When the alert was sent */
+  sent_at: string;
+}
+
+// ============================================================================
+// RESPONSE TYPES
+// ============================================================================
+
+/**
+ * Grouped response for expiring items by urgency.
+ */
+export interface ExpiringItemsResponse {
+  /** Items expiring today */
+  expiring_today: UserInventoryItem[];
+  /** Items expiring within 7 days */
+  expiring_this_week: UserInventoryItem[];
+  /** Items expiring within 30 days */
+  expiring_this_month: UserInventoryItem[];
+  /** Items already expired */
+  already_expired: UserInventoryItem[];
+  /** Summary counts */
+  counts: {
+    today: number;
+    this_week: number;
+    this_month: number;
+    expired: number;
+    total: number;
+  };
+}
+
+/**
+ * Recipe that can be made with expiring ingredients.
+ */
+export interface RecipeWithExpiringIngredients {
+  /** Recipe ID */
+  recipe_id: number;
+  /** Recipe name */
+  recipe_name: string;
+  /** Recipe image URL */
+  photo_url: string | null;
+  /** Prep time in minutes */
+  prep_time_minutes: number | null;
+  /** Cook time in minutes */
+  cook_time_minutes: number | null;
+  /** Number of servings */
+  servings: number | null;
+  /** Average rating */
+  avg_rating: number;
+  /** Expiring items that match recipe ingredients */
+  matching_expiring_items: UserInventoryItem[];
+  /** Number of matching ingredients */
+  matching_count: number;
+  /** Total recipe ingredients */
+  total_ingredients: number;
+  /** Percentage of ingredients matched by expiring items */
+  match_percentage: number;
+}
+
+/**
+ * Recipe suggestions based on expiring items.
+ */
+export interface ExpiryRecipeSuggestionsResponse {
+  /** Recipes that use expiring items */
+  recipes: RecipeWithExpiringIngredients[];
+  /** Total count for pagination */
+  total: number;
+  /** Items that were considered for matching */
+  considered_items: UserInventoryItem[];
+}
+
+// ============================================================================
+// RECEIPT SCANNING TYPES
+// ============================================================================
+
+/**
+ * Receipt processing status.
+ */
+export type ReceiptStatus = 'pending' | 'processing' | 'completed' | 'failed';
+
+/**
+ * Receipt item matching status.
+ */
+export type ReceiptItemStatus = 'unmatched' | 'matched' | 'needs_review' | 'ignored';
+
+/**
+ * Receipt processing step for logging.
+ */
+export type ReceiptProcessingStep =
+  | 'upload'
+  | 'ocr_extraction'
+  | 'text_parsing'
+  | 'store_detection'
+  | 'item_extraction'
+  | 'item_matching'
+  | 'price_parsing'
+  | 'finalization';
+
+/**
+ * Receipt processing log status.
+ */
+export type ReceiptProcessingStatus = 'started' | 'completed' | 'failed' | 'skipped';
+
+/**
+ * OCR providers for receipt processing.
+ */
+export type OcrProvider =
+  | 'tesseract'
+  | 'openai'
+  | 'anthropic'
+  | 'google_vision'
+  | 'aws_textract'
+  | 'gemini'
+  | 'internal';
+
+/**
+ * Receipt scan record from database.
+ * Maps to public.receipts table.
+ */
+export interface ReceiptScan {
+  /** Primary key */
+  receipt_id: number;
+  /** User who uploaded the receipt */
+  user_id: string;
+  /** Detected store */
+  store_id: number | null;
+  /** Path to receipt image */
+  receipt_image_url: string;
+  /** Transaction date from receipt */
+  transaction_date: string | null;
+  /** Total amount in cents */
+  total_amount_cents: number | null;
+  /** Processing status */
+  status: ReceiptStatus;
+  /** Raw OCR text */
+  raw_text: string | null;
+  /** Store detection confidence */
+  store_confidence: number | null;
+  /** OCR provider used */
+  ocr_provider: OcrProvider | null;
+  /** Error details if failed */
+  error_details: Record<string, unknown> | null;
+  /** Number of retry attempts */
+  retry_count: number;
+  /** OCR confidence score */
+  ocr_confidence: number | null;
+  /** Detected currency */
+  currency: string;
+  /** Record timestamps */
+  created_at: string;
+  processed_at: string | null;
+  updated_at: string;
+}
+
+/**
+ * Item extracted from a receipt.
+ * Maps to public.receipt_items table.
+ */
+export interface ReceiptItem {
+  /** Primary key */
+  receipt_item_id: number;
+  /** Parent receipt */
+  receipt_id: number;
+  /** Raw item text from receipt */
+  raw_item_description: string;
+  /** Quantity purchased */
+  quantity: number;
+  /** Price paid in cents */
+  price_paid_cents: number;
+  /** Matched master item */
+  master_item_id: number | null;
+  /** Matched product */
+  product_id: number | null;
+  /** Matching status */
+  status: ReceiptItemStatus;
+  /** Line number on receipt */
+  line_number: number | null;
+  /** Match confidence score */
+  match_confidence: number | null;
+  /** Whether this is a discount line */
+  is_discount: boolean;
+  /** Unit price if detected */
+  unit_price_cents: number | null;
+  /** Unit type if detected */
+  unit_type: string | null;
+  /** Whether added to pantry */
+  added_to_pantry: boolean;
+  /** Link to pantry item if added */
+  pantry_item_id: number | null;
+  /** UPC code if extracted */
+  upc_code: string | null;
+  /** Record timestamps */
+  created_at: string;
+  updated_at: string;
+}
+
+/**
+ * Request to upload a receipt for scanning.
+ */
+export interface UploadReceiptRequest {
+  /** Base64-encoded receipt image */
+  image_base64: string;
+  /** Known store ID (optional) */
+  store_id?: number;
+  /** Known transaction date (optional) */
+  transaction_date?: string;
+}
+
+/**
+ * Request to confirm receipt items and add to inventory.
+ */
+export interface ConfirmReceiptItemsRequest {
+  /** Items to add to inventory */
+  items: Array<{
+    /** Receipt item ID */
+    receipt_item_id: number;
+    /** Override item name */
+    item_name?: string;
+    /** Override quantity */
+    quantity?: number;
+    /** Storage location */
+    location?: StorageLocation;
+    /** Expiry date if known */
+    expiry_date?: string;
+    /** Whether to add this item (false = skip) */
+    include: boolean;
+  }>;
+}
+
+/**
+ * Receipt processing log record.
+ * Maps to public.receipt_processing_log table.
+ */
+export interface ReceiptProcessingLogRecord {
+  /** Primary key */
+  log_id: number;
+  /** Parent receipt */
+  receipt_id: number;
+  /** Processing step */
+  processing_step: ReceiptProcessingStep;
+  /** Step status */
+  status: ReceiptProcessingStatus;
+  /** Provider used */
+  provider: OcrProvider | null;
+  /** Duration in milliseconds */
+  duration_ms: number | null;
+  /** Tokens used (for LLM) */
+  tokens_used: number | null;
+  /** Cost in cents */
+  cost_cents: number | null;
+  /** Input data */
+  input_data: Record<string, unknown> | null;
+  /** Output data */
+  output_data: Record<string, unknown> | null;
+  /** Error message if failed */
+  error_message: string | null;
+  /** When logged */
+  created_at: string;
+}
+
+// ============================================================================
+// QUERY OPTION TYPES
+// ============================================================================
+
+/**
+ * Options for querying user inventory.
+ */
+export interface InventoryQueryOptions {
+  /** User ID to filter by */
+  user_id: string;
+  /** Filter by storage location */
+  location?: StorageLocation;
+  /** Filter by consumed status */
+  is_consumed?: boolean;
+  /** Filter items expiring within N days */
+  expiring_within_days?: number;
+  /** Filter by category ID */
+  category_id?: number;
+  /** Search by item name */
+  search?: string;
+  /** Maximum number of results */
+  limit?: number;
+  /** Offset for pagination */
+  offset?: number;
+  /** Sort field */
+  sort_by?: 'expiry_date' | 'purchase_date' | 'item_name' | 'created_at';
+  /** Sort direction */
+  sort_order?: 'asc' | 'desc';
+}
+
+/**
+ * Options for querying expiry date ranges.
+ */
+export interface ExpiryRangeQueryOptions {
+  /** Filter by master item ID */
+  master_item_id?: number;
+  /** Filter by category ID */
+  category_id?: number;
+  /** Filter by storage location */
+  storage_location?: StorageLocation;
+  /** Filter by source */
+  source?: ExpiryRangeSource;
+  /** Maximum number of results */
+  limit?: number;
+  /** Offset for pagination */
+  offset?: number;
+}
+
+/**
+ * Options for calculating expiry date.
+ */
+export interface CalculateExpiryOptions {
+  /** Master item ID for lookup */
+  master_item_id?: number;
+  /** Category ID for fallback lookup */
+  category_id?: number;
+  /** Item name for pattern matching fallback */
+  item_name?: string;
+  /** Storage location */
+  storage_location: StorageLocation;
+  /** Purchase date to calculate from */
+  purchase_date: string;
+}
--- a/src/types/job-data.ts
+++ b/src/types/job-data.ts
@@ -1,5 +1,18 @@
 // src/types/job-data.ts

+/**
+ * Common metadata for context propagation across job queues (ADR-051).
+ * This enables tracing a request from API layer through worker execution.
+ */
+export interface JobMeta {
+  /** The request ID from the initiating API request */
+  requestId?: string;
+  /** The user ID who triggered the job (if authenticated) */
+  userId?: string;
+  /** The origin of the job (e.g., 'api', 'scheduler', 'admin') */
+  origin?: 'api' | 'api-reprocess' | 'scheduler' | 'admin' | 'manual';
+}
+
 /**
 * Defines the shape of the data payload for a flyer processing job.
 * This is the data that gets passed to the BullMQ worker.
@@ -12,6 +25,8 @@ export interface FlyerJobData {
  submitterIp?: string;
  userProfileAddress?: string;
  baseUrl: string;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
 }

 /**
@@ -20,6 +35,8 @@ export interface FlyerJobData {
 export interface CleanupJobData {
  flyerId: number;
  paths?: string[];
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
 }

 /**
@@ -27,6 +44,8 @@ export interface CleanupJobData {
 */
 export interface TokenCleanupJobData {
  timestamp: string;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
 }

 /**
@@ -34,6 +53,8 @@ export interface TokenCleanupJobData {
 */
 export interface AnalyticsJobData {
  reportDate: string;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
 }

 /**
@@ -42,6 +63,8 @@ export interface AnalyticsJobData {
 export interface WeeklyAnalyticsJobData {
  reportYear: number;
  reportWeek: number;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
 }

 /**
@@ -52,4 +75,52 @@ export interface EmailJobData {
  subject: string;
  text: string;
  html: string;
-}
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
+}
+
+/**
+ * Defines the shape of the data payload for a receipt processing job.
+ */
+export interface ReceiptJobData {
+  /** ID of the receipt record in the database */
+  receiptId: number;
+  /** Path to the uploaded receipt image */
+  imagePath: string;
+  /** User who uploaded the receipt */
+  userId: string;
+  /** Known store ID (optional, for hint to OCR) */
+  storeId?: number;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
+}
+
+/**
+ * Defines the shape of the data payload for an expiry alert job.
+ */
+export interface ExpiryAlertJobData {
+  /** Type of alert job */
+  alertType: 'daily_check' | 'user_specific';
+  /** For user_specific jobs, the target user */
+  userId?: string;
+  /** Days ahead to check for expiring items */
+  daysAhead?: number;
+  /** Timestamp when the job was scheduled */
+  scheduledAt: string;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
+}
+
+/**
+ * Defines the shape of the data payload for a barcode detection job.
+ */
+export interface BarcodeDetectionJobData {
+  /** ID of the scan record in the database */
+  scanId: number;
+  /** Path to the uploaded barcode image */
+  imagePath: string;
+  /** User who uploaded the image */
+  userId: string;
+  /** Context propagation metadata (ADR-051) */
+  meta?: JobMeta;
+}
--- a/src/types/upc.ts
+++ b/src/types/upc.ts
@@ -0,0 +1,282 @@
+// src/types/upc.ts
+// ============================================================================
+// UPC SCANNING TYPE DEFINITIONS
+// ============================================================================
+// Type definitions for the UPC barcode scanning feature.
+// Covers scan requests, results, history, and external API lookups.
+// ============================================================================
+
+/**
+ * Valid sources for UPC barcode scans.
+ * - image_upload: User uploaded an image containing a barcode
+ * - manual_entry: User typed the UPC code manually
+ * - phone_app: Scan came from a mobile phone app
+ * - camera_scan: Real-time camera scanning in browser
+ */
+export type UpcScanSource = 'image_upload' | 'manual_entry' | 'phone_app' | 'camera_scan';
+
+/**
+ * External UPC database providers supported for lookups.
+ * - openfoodfacts: Open Food Facts API (free, open source)
+ * - upcitemdb: UPC Item DB API
+ * - barcodelookup: Barcode Lookup API
+ * - manual: Manually entered product info
+ * - unknown: Source not identified
+ */
+export type UpcExternalSource =
+  | 'openfoodfacts'
+  | 'upcitemdb'
+  | 'barcodelookup'
+  | 'manual'
+  | 'unknown';
+
+// ============================================================================
+// REQUEST TYPES
+// ============================================================================
+
+/**
+ * Request to scan a UPC barcode.
+ * Either upc_code (manual entry) or image_base64 (image scan) must be provided.
+ */
+export interface UpcScanRequest {
+  /** UPC code entered manually (8-14 digits) */
+  upc_code?: string;
+  /** Base64-encoded image containing barcode */
+  image_base64?: string;
+  /** How the scan was initiated */
+  scan_source: UpcScanSource;
+}
+
+/**
+ * Request to look up a UPC code without recording the scan.
+ */
+export interface UpcLookupRequest {
+  /** UPC code to look up (8-14 digits) */
+  upc_code: string;
+  /** Whether to check external APIs if not found locally */
+  include_external?: boolean;
+}
+
+/**
+ * Request to link a UPC code to an existing product (admin operation).
+ */
+export interface UpcLinkRequest {
+  /** The UPC code to link */
+  upc_code: string;
+  /** The product ID to link to */
+  product_id: number;
+}
+
+// ============================================================================
+// RESPONSE TYPES
+// ============================================================================
+
+/**
+ * Product information returned when a UPC match is found.
+ */
+export interface UpcProductMatch {
+  /** Internal product ID */
+  product_id: number;
+  /** Product name */
+  name: string;
+  /** Brand name, if known */
+  brand: string | null;
+  /** Product category */
+  category: string | null;
+  /** Product description */
+  description: string | null;
+  /** Product size/weight (e.g., "500g") */
+  size: string | null;
+  /** The UPC code */
+  upc_code: string;
+  /** Product image URL, if available */
+  image_url: string | null;
+  /** Link to master grocery item */
+  master_item_id: number | null;
+}
+
+/**
+ * Product information from external UPC database lookup.
+ */
+export interface UpcExternalProductInfo {
+  /** Product name from external source */
+  name: string;
+  /** Brand name from external source */
+  brand: string | null;
+  /** Product category from external source */
+  category: string | null;
+  /** Product description from external source */
+  description: string | null;
+  /** Product image URL from external source */
+  image_url: string | null;
+  /** Which external API provided this data */
+  source: UpcExternalSource;
+  /** Raw JSON data from the external API */
+  raw_data?: Record<string, unknown>;
+}
+
+/**
+ * Complete result from a UPC scan operation.
+ */
+export interface UpcScanResult {
+  /** ID of the recorded scan (for history tracking) */
+  scan_id: number;
+  /** The scanned UPC code */
+  upc_code: string;
+  /** Matched product from our database, if found */
+  product: UpcProductMatch | null;
+  /** Product info from external lookup, if performed */
+  external_lookup: UpcExternalProductInfo | null;
+  /** Confidence score of barcode detection (0.0-1.0) */
+  confidence: number | null;
+  /** Whether any product info was found (internal or external) */
+  lookup_successful: boolean;
+  /** Whether this UPC was not previously in our database */
+  is_new_product: boolean;
+  /** Timestamp of the scan */
+  scanned_at: string;
+}
+
+/**
+ * Result from a UPC lookup (without recording scan history).
+ */
+export interface UpcLookupResult {
+  /** The looked up UPC code */
+  upc_code: string;
+  /** Matched product from our database, if found */
+  product: UpcProductMatch | null;
+  /** Product info from external lookup, if performed and enabled */
+  external_lookup: UpcExternalProductInfo | null;
+  /** Whether any product info was found */
+  found: boolean;
+  /** Whether the lookup result came from cache */
+  from_cache: boolean;
+}
+
+// ============================================================================
+// DATABASE ENTITY TYPES
+// ============================================================================
+
+/**
+ * UPC scan history record from the database.
+ * Maps to public.upc_scan_history table.
+ */
+export interface UpcScanHistoryRecord {
+  /** Primary key */
+  scan_id: number;
+  /** User who performed the scan */
+  user_id: string;
+  /** The scanned UPC code */
+  upc_code: string;
+  /** Matched product ID, if found */
+  product_id: number | null;
+  /** How the scan was performed */
+  scan_source: UpcScanSource;
+  /** Confidence score from barcode detection */
+  scan_confidence: number | null;
+  /** Path to uploaded barcode image */
+  raw_image_path: string | null;
+  /** Whether the lookup found product info */
+  lookup_successful: boolean;
+  /** When the scan was recorded */
+  created_at: string;
+  /** Last update timestamp */
+  updated_at: string;
+}
+
+/**
+ * External UPC lookup cache record from the database.
+ * Maps to public.upc_external_lookups table.
+ */
+export interface UpcExternalLookupRecord {
+  /** Primary key */
+  lookup_id: number;
+  /** The UPC code that was looked up */
+  upc_code: string;
+  /** Product name from external API */
+  product_name: string | null;
+  /** Brand name from external API */
+  brand_name: string | null;
+  /** Product category from external API */
+  category: string | null;
+  /** Product description from external API */
+  description: string | null;
+  /** Product image URL from external API */
+  image_url: string | null;
+  /** Which external API provided this data */
+  external_source: UpcExternalSource;
+  /** Full raw JSON response from external API */
+  lookup_data: Record<string, unknown> | null;
+  /** Whether the external lookup found product info */
+  lookup_successful: boolean;
+  /** When the lookup was cached */
+  created_at: string;
+  /** Last update timestamp */
+  updated_at: string;
+}
+
+// ============================================================================
+// API RESPONSE TYPES
+// ============================================================================
+
+/**
+ * Response for scan history listing.
+ */
+export interface UpcScanHistoryResponse {
+  /** List of scan history records */
+  scans: UpcScanHistoryRecord[];
+  /** Total count for pagination */
+  total: number;
+}
+
+/**
+ * Barcode detection result from image processing.
+ */
+export interface BarcodeDetectionResult {
+  /** Whether a barcode was detected */
+  detected: boolean;
+  /** The decoded UPC code, if detected */
+  upc_code: string | null;
+  /** Confidence score of detection (0.0-1.0) */
+  confidence: number | null;
+  /** Barcode format detected (UPC-A, UPC-E, EAN-13, etc.) */
+  format: string | null;
+  /** Error message if detection failed */
+  error: string | null;
+}
+
+// ============================================================================
+// UTILITY TYPES
+// ============================================================================
+
+/**
+ * Options for UPC scan history queries.
+ */
+export interface UpcScanHistoryQueryOptions {
+  /** User ID to filter by */
+  user_id: string;
+  /** Maximum number of results */
+  limit?: number;
+  /** Offset for pagination */
+  offset?: number;
+  /** Filter by lookup success status */
+  lookup_successful?: boolean;
+  /** Filter by scan source */
+  scan_source?: UpcScanSource;
+  /** Filter by date range start */
+  from_date?: string;
+  /** Filter by date range end */
+  to_date?: string;
+}
+
+/**
+ * Options for external UPC lookup.
+ */
+export interface UpcExternalLookupOptions {
+  /** UPC code to look up */
+  upc_code: string;
+  /** Whether to skip cache and force fresh lookup */
+  force_refresh?: boolean;
+  /** Maximum age of cached data in hours (default: 168 = 7 days) */
+  max_cache_age_hours?: number;
+}