ci: Bump version to 0.9.76 [skip ci]

.claude/settings.local.json

@@ -56,7 +56,30 @@
       "mcp__memory__delete_entities",
       "mcp__sequential-thinking__sequentialthinking",
       "mcp__filesystem__list_directory",
-      "mcp__filesystem__read_multiple_files"
+      "mcp__filesystem__read_multiple_files",
+      "mcp__filesystem__directory_tree",
+      "mcp__filesystem__read_text_file",
+      "Bash(wc:*)",
+      "Bash(npm install:*)",
+      "Bash(git grep:*)",
+      "Bash(findstr:*)",
+      "Bash(git add:*)",
+      "mcp__filesystem__write_file",
+      "mcp__podman__container_list",
+      "Bash(podman cp:*)",
+      "mcp__podman__container_inspect",
+      "mcp__podman__network_list",
+      "Bash(podman network connect:*)",
+      "Bash(npm run build:*)",
+      "Bash(set NODE_ENV=test)",
+      "Bash(podman-compose:*)",
+      "Bash(timeout 60 podman machine start:*)",
+      "Bash(podman build:*)",
+      "Bash(podman network rm:*)",
+      "Bash(npm run lint)",
+      "Bash(npm run typecheck:*)",
+      "Bash(npm run type-check:*)",
+      "Bash(npm run test:unit:*)"
     ]
   }
 }

.devcontainer/devcontainer.json

@@ -1,18 +1,96 @@
 {
+  // ============================================================================
+  // VS CODE DEV CONTAINER CONFIGURATION
+  // ============================================================================
+  // This file configures VS Code's Dev Containers extension to provide a
+  // consistent, fully-configured development environment.
+  //
+  // Features:
+  //   - Automatic PostgreSQL + Redis startup with healthchecks
+  //   - Automatic npm install
+  //   - Automatic database schema initialization and seeding
+  //   - Pre-configured VS Code extensions (ESLint, Prettier)
+  //   - Podman support for Windows users
+  //
+  // Usage:
+  //   1. Install the "Dev Containers" extension in VS Code
+  //   2. Open this project folder
+  //   3. Click "Reopen in Container" when prompted (or use Command Palette)
+  //   4. Wait for container build and initialization
+  //   5. Development server starts automatically
+  // ============================================================================
+
   "name": "Flyer Crawler Dev (Ubuntu 22.04)",
+
+  // Use Docker Compose for multi-container setup
   "dockerComposeFile": ["../compose.dev.yml"],
   "service": "app",
   "workspaceFolder": "/app",
+
+  // VS Code customizations
   "customizations": {
     "vscode": {
-      "extensions": ["dbaeumer.vscode-eslint", "esbenp.prettier-vscode"]
+      "extensions": [
+        // Code quality
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode",
+        // TypeScript
+        "ms-vscode.vscode-typescript-next",
+        // Database
+        "mtxr.sqltools",
+        "mtxr.sqltools-driver-pg",
+        // Utilities
+        "eamodio.gitlens",
+        "streetsidesoftware.code-spell-checker"
+      ],
+      "settings": {
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "typescript.preferences.importModuleSpecifier": "relative"
+      }
     }
   },
+
+  // Run as root (required for npm global installs)
   "remoteUser": "root",
-  // Automatically install dependencies when the container is created.
-  // This runs inside the container, populating the isolated node_modules volume.
-  "postCreateCommand": "npm install",
+
+  // ============================================================================
+  // Lifecycle Commands
+  // ============================================================================
+
+  // initializeCommand: Runs on the HOST before the container is created.
+  // Starts Podman machine on Windows (no-op if already running or using Docker).
+  "initializeCommand": "powershell -Command \"podman machine start; exit 0\"",
+
+  // postCreateCommand: Runs ONCE when the container is first created.
+  // This is where we do full initialization: npm install + database setup.
+  "postCreateCommand": "chmod +x scripts/docker-init.sh && ./scripts/docker-init.sh",
+
+  // postAttachCommand: Runs EVERY TIME VS Code attaches to the container.
+  // Starts the development server automatically.
   "postAttachCommand": "npm run dev:container",
-  // Try to start podman machine, but exit with success (0) even if it's already running
-  "initializeCommand": "powershell -Command \"podman machine start; exit 0\""
+
+  // ============================================================================
+  // Port Forwarding
+  // ============================================================================
+  // Automatically forward these ports from the container to the host
+  "forwardPorts": [3000, 3001],
+
+  // Labels for forwarded ports in VS Code's Ports panel
+  "portsAttributes": {
+    "3000": {
+      "label": "Frontend (Vite)",
+      "onAutoForward": "notify"
+    },
+    "3001": {
+      "label": "Backend API",
+      "onAutoForward": "notify"
+    }
+  },
+
+  // ============================================================================
+  // Features
+  // ============================================================================
+  // Additional dev container features (optional)
+  "features": {}
 }

.env.example

@@ -0,0 +1,77 @@
+# .env.example
+# ============================================================================
+# ENVIRONMENT VARIABLES TEMPLATE
+# ============================================================================
+# Copy this file to .env and fill in your values.
+# For local development with Docker/Podman, these defaults should work out of the box.
+#
+# IMPORTANT: Never commit .env files with real credentials to version control!
+# ============================================================================
+
+# ===================
+# Database Configuration
+# ===================
+# PostgreSQL connection settings
+# For container development, use the service name "postgres"
+DB_HOST=postgres
+DB_PORT=5432
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_NAME=flyer_crawler_dev
+
+# ===================
+# Redis Configuration
+# ===================
+# Redis URL for caching and job queues
+# For container development, use the service name "redis"
+REDIS_URL=redis://redis:6379
+# Optional: Redis password (leave empty if not required)
+REDIS_PASSWORD=
+
+# ===================
+# Application Settings
+# ===================
+NODE_ENV=development
+# Frontend URL for CORS and email links
+FRONTEND_URL=http://localhost:3000
+
+# ===================
+# Authentication
+# ===================
+# REQUIRED: Secret key for signing JWT tokens (generate a random 64+ character string)
+JWT_SECRET=your-super-secret-jwt-key-change-this-in-production
+
+# ===================
+# AI/ML Services
+# ===================
+# REQUIRED: Google Gemini API key for flyer OCR processing
+GEMINI_API_KEY=your-gemini-api-key
+
+# ===================
+# External APIs
+# ===================
+# Optional: Google Maps API key for geocoding store addresses
+GOOGLE_MAPS_API_KEY=
+
+# ===================
+# Email Configuration (Optional)
+# ===================
+# SMTP settings for sending emails (deal notifications, password reset)
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_SECURE=false
+SMTP_USER=
+SMTP_PASS=
+SMTP_FROM_EMAIL=noreply@example.com
+
+# ===================
+# Worker Configuration (Optional)
+# ===================
+# Concurrency settings for background job workers
+WORKER_CONCURRENCY=1
+EMAIL_WORKER_CONCURRENCY=10
+ANALYTICS_WORKER_CONCURRENCY=1
+CLEANUP_WORKER_CONCURRENCY=10
+
+# Worker lock duration in milliseconds (default: 2 minutes)
+WORKER_LOCK_DURATION=120000

.env.test

@@ -0,0 +1,6 @@
+DB_HOST=10.89.0.4
+DB_USER=flyer
+DB_PASSWORD=flyer
+DB_NAME=flyer_crawler_test
+REDIS_URL=redis://redis:6379
+NODE_ENV=test

.gemini/settings.json

@@ -1,61 +1,66 @@
 {
-	"mcpServers": {
-		"markitdown": {
-			"command": "C:\\Users\\games3\\.local\\bin\\uvx.exe",
-			"args": [
-				"markitdown-mcp"
-			]
-		},
-		"gitea-torbonium": {
-			"command": "d:\\gitea-mcp\\gitea-mcp.exe",
-			"args": ["run", "-t", "stdio"],
-			"env": {
-				"GITEA_HOST": "https://gitea.torbonium.com",
-				"GITEA_ACCESS_TOKEN": "391c9ddbe113378bc87bb8184800ba954648fcf8"
-			}
-		},
-		"gitea-lan": {
-			"command": "d:\\gitea-mcp\\gitea-mcp.exe",
-			"args": ["run", "-t", "stdio"],
-			"env": {
-				"GITEA_HOST": "https://gitea.torbolan.com",
-				"GITEA_ACCESS_TOKEN": "REPLACE_WITH_NEW_TOKEN"
-			}
-		},
-		"gitea-projectium": {
-			"command": "d:\\gitea-mcp\\gitea-mcp.exe",
-			"args": ["run", "-t", "stdio"],
-			"env": {
-				"GITEA_HOST": "https://gitea.projectium.com",
-				"GITEA_ACCESS_TOKEN": "c72bc0f14f623fec233d3c94b3a16397fe3649ef"
-			}
-		},
-		"podman": {
-			"command": "D:\\nodejs\\npx.cmd",
-			"args": ["-y", "podman-mcp-server@latest"],
-			"env": {
-				"DOCKER_HOST": "npipe:////./pipe/podman-machine-default"
-			}
-		},
-		"filesystem": {
-			"command": "D:\\nodejs\\npx.cmd",
-			"args": [
-				"-y",
-				"@modelcontextprotocol/server-filesystem",
-				"D:\\gitea\\flyer-crawler.projectium.com\\flyer-crawler.projectium.com"
-			]
-		},
-		"fetch": {
-			"command": "D:\\nodejs\\npx.cmd",
-			"args": ["-y", "@modelcontextprotocol/server-fetch"]
-		},
-      	"sequential-thinking": {
-		    "command": "D:\\nodejs\\npx.cmd",
-		    "args": ["-y", "@modelcontextprotocol/server-sequential-thinking"]
-	    },
-	    "memory": {
-		    "command": "D:\\nodejs\\npx.cmd",
-		    "args": ["-y", "@modelcontextprotocol/server-memory"]
-	    }
-	}
-}
+  "mcpServers": {
+    "gitea-projectium": {
+      "command": "d:\\gitea-mcp\\gitea-mcp.exe",
+      "args": ["run", "-t", "stdio"],
+      "env": {
+        "GITEA_HOST": "https://gitea.projectium.com",
+        "GITEA_ACCESS_TOKEN": "c72bc0f14f623fec233d3c94b3a16397fe3649ef"
+      }
+    },
+    "gitea-torbonium": {
+      "command": "d:\\gitea-mcp\\gitea-mcp.exe",
+      "args": ["run", "-t", "stdio"],
+      "env": {
+        "GITEA_HOST": "https://gitea.torbonium.com",
+        "GITEA_ACCESS_TOKEN": "391c9ddbe113378bc87bb8184800ba954648fcf8"
+      }
+    },
+    "gitea-lan": {
+      "command": "d:\\gitea-mcp\\gitea-mcp.exe",
+      "args": ["run", "-t", "stdio"],
+      "env": {
+        "GITEA_HOST": "https://gitea.torbolan.com",
+        "GITEA_ACCESS_TOKEN": "YOUR_LAN_TOKEN_HERE"
+      },
+      "disabled": true
+    },
+    "podman": {
+      "command": "D:\\nodejs\\npx.cmd",
+      "args": ["-y", "podman-mcp-server@latest"],
+      "env": {
+        "DOCKER_HOST": "npipe:////./pipe/podman-machine-default"
+      }
+    },
+    "filesystem": {
+      "command": "d:\\nodejs\\node.exe",
+      "args": [
+        "c:\\Users\\games3\\AppData\\Roaming\\npm\\node_modules\\@modelcontextprotocol\\server-filesystem\\dist\\index.js",
+        "d:\\gitea\\flyer-crawler.projectium.com\\flyer-crawler.projectium.com"
+      ]
+    },
+    "fetch": {
+      "command": "D:\\nodejs\\npx.cmd",
+      "args": ["-y", "@modelcontextprotocol/server-fetch"]
+    },
+    "io.github.ChromeDevTools/chrome-devtools-mcp": {
+      "type": "stdio",
+      "command": "npx",
+      "args": ["chrome-devtools-mcp@0.12.1"],
+      "gallery": "https://api.mcp.github.com",
+      "version": "0.12.1"
+    },
+    "markitdown": {
+      "command": "C:\\Users\\games3\\.local\\bin\\uvx.exe",
+      "args": ["markitdown-mcp"]
+    },
+    "sequential-thinking": {
+      "command": "D:\\nodejs\\npx.cmd",
+      "args": ["-y", "@modelcontextprotocol/server-sequential-thinking"]
+    },
+    "memory": {
+      "command": "D:\\nodejs\\npx.cmd",
+      "args": ["-y", "@modelcontextprotocol/server-memory"]
+    }
+  }
+}

.gitea/workflows/deploy-to-prod.yml

@@ -117,7 +117,8 @@ jobs:
           DB_USER: ${{ secrets.DB_USER }}
           DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
           DB_NAME: ${{ secrets.DB_DATABASE_PROD }}
-          REDIS_URL: 'redis://localhost:6379'
+          # Explicitly use database 0 for production (test uses database 1)
+          REDIS_URL: 'redis://localhost:6379/0'
           REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_PROD }}
           FRONTEND_URL: 'https://flyer-crawler.projectium.com'
           JWT_SECRET: ${{ secrets.JWT_SECRET }}

.gitea/workflows/deploy-to-test.yml

@@ -96,6 +96,24 @@ jobs:
           # It prevents the accumulation of duplicate processes from previous test runs.
           node -e "const exec = require('child_process').execSync; try { const list = JSON.parse(exec('pm2 jlist').toString()); list.forEach(p => { if (p.name && p.name.endsWith('-test')) { console.log('Deleting test process: ' + p.name + ' (' + p.pm2_env.pm_id + ')'); try { exec('pm2 delete ' + p.pm2_env.pm_id); } catch(e) { console.error('Failed to delete ' + p.pm2_env.pm_id, e.message); } } }); console.log('✅ Test process cleanup complete.'); } catch (e) { if (e.stdout.toString().includes('No process found')) { console.log('No PM2 processes running, cleanup not needed.'); } else { console.error('Error cleaning up test processes:', e.message); } }" || true
 
+      - name: Flush Redis Test Database Before Tests
+        # CRITICAL: Clear Redis database 1 (test database) to remove stale BullMQ jobs.
+        # This prevents old jobs with outdated error messages from polluting test results.
+        # NOTE: We use database 1 for tests to isolate from production (database 0).
+        env:
+          REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_TEST }}
+        run: |
+          echo "--- Flushing Redis database 1 (test database) to remove stale jobs ---"
+          if [ -z "$REDIS_PASSWORD" ]; then
+            echo "⚠️ REDIS_PASSWORD_TEST not set, attempting flush without password..."
+            redis-cli -n 1 FLUSHDB || echo "Redis flush failed (no password)"
+          else
+            redis-cli -a "$REDIS_PASSWORD" -n 1 FLUSHDB 2>/dev/null && echo "✅ Redis database 1 (test) flushed successfully." || echo "⚠️ Redis flush failed"
+          fi
+          # Verify the flush worked by checking key count on database 1
+          KEY_COUNT=$(redis-cli -a "$REDIS_PASSWORD" -n 1 DBSIZE 2>/dev/null | grep -oE '[0-9]+' || echo "unknown")
+          echo "Redis database 1 key count after flush: $KEY_COUNT"
+
       - name: Run All Tests and Generate Merged Coverage Report
         # This single step runs both unit and integration tests, then merges their
         # coverage data into a single report. It combines the environment variables
@@ -109,7 +127,9 @@ jobs:
           DB_NAME: 'flyer-crawler-test' # Explicitly set for tests
 
           # --- Redis credentials for the test suite ---
-          REDIS_URL: 'redis://localhost:6379'
+          # CRITICAL: Use Redis database 1 to isolate tests from production (which uses db 0).
+          # This prevents the production worker from picking up test jobs.
+          REDIS_URL: 'redis://localhost:6379/1'
           REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_TEST }}
 
           # --- Integration test specific variables ---
@@ -117,6 +137,13 @@ jobs:
           VITE_API_BASE_URL: 'http://localhost:3001/api'
           GEMINI_API_KEY: ${{ secrets.VITE_GOOGLE_GENAI_API_KEY }}
 
+          # --- Storage path for flyer images ---
+          # CRITICAL: Use an absolute path in the test runner's working directory for file storage.
+          # This ensures tests can read processed files to verify their contents (e.g., EXIF stripping).
+          # Without this, multer and flyerProcessingService default to /var/www/.../flyer-images.
+          # NOTE: We use ${{ github.workspace }} which resolves to the checkout directory.
+          STORAGE_PATH: '${{ github.workspace }}/flyer-images'
+
           # --- JWT Secret for Passport authentication in tests ---
           JWT_SECRET: ${{ secrets.JWT_SECRET }}
 
@@ -384,8 +411,8 @@ jobs:
           DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
           DB_NAME: ${{ secrets.DB_DATABASE_TEST }}
 
-          # Redis Credentials
-          REDIS_URL: 'redis://localhost:6379'
+          # Redis Credentials (use database 1 to isolate from production)
+          REDIS_URL: 'redis://localhost:6379/1'
           REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_TEST }}
 
           # Application Secrets

.gitea/workflows/manual-deploy-major.yml

@@ -116,7 +116,8 @@ jobs:
           DB_USER: ${{ secrets.DB_USER }}
           DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
           DB_NAME: ${{ secrets.DB_DATABASE_PROD }}
-          REDIS_URL: 'redis://localhost:6379'
+          # Explicitly use database 0 for production (test uses database 1)
+          REDIS_URL: 'redis://localhost:6379/0'
           REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_PROD }}
           FRONTEND_URL: 'https://flyer-crawler.projectium.com'
           JWT_SECRET: ${{ secrets.JWT_SECRET }}

.gitea/workflows/manual-redis-flush-prod.yml

@@ -0,0 +1,167 @@
+# .gitea/workflows/manual-redis-flush-prod.yml
+#
+# DANGER: This workflow is DESTRUCTIVE and intended for manual execution only.
+# It will completely FLUSH the PRODUCTION Redis database (db 0).
+# This will clear all BullMQ queues, sessions, caches, and any other Redis data.
+#
+name: Manual - Flush Production Redis
+
+on:
+  workflow_dispatch:
+    inputs:
+      confirmation:
+        description: 'DANGER: This will FLUSH production Redis. Type "flush-production-redis" to confirm.'
+        required: true
+        default: 'do-not-run'
+      flush_type:
+        description: 'What to flush?'
+        required: true
+        type: choice
+        options:
+          - 'queues-only'
+          - 'entire-database'
+        default: 'queues-only'
+
+jobs:
+  flush-redis:
+    runs-on: projectium.com # This job runs on your self-hosted Gitea runner.
+
+    env:
+      REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD_PROD }}
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: '**/package-lock.json'
+
+      - name: Install Dependencies
+        run: npm ci
+
+      - name: Validate Secrets
+        run: |
+          if [ -z "$REDIS_PASSWORD" ]; then
+            echo "ERROR: REDIS_PASSWORD_PROD secret is not set in Gitea repository settings."
+            exit 1
+          fi
+          echo "✅ Redis password secret is present."
+
+      - name: Verify Confirmation Phrase
+        run: |
+          if [ "${{ gitea.event.inputs.confirmation }}" != "flush-production-redis" ]; then
+            echo "ERROR: Confirmation phrase did not match. Aborting Redis flush."
+            exit 1
+          fi
+          echo "✅ Confirmation accepted. Proceeding with Redis flush."
+
+      - name: Show Current Redis State
+        run: |
+          echo "--- Current Redis Database 0 (Production) State ---"
+          redis-cli -a "$REDIS_PASSWORD" -n 0 INFO keyspace 2>/dev/null || echo "Could not get keyspace info"
+          echo ""
+          echo "--- Key Count ---"
+          KEY_COUNT=$(redis-cli -a "$REDIS_PASSWORD" -n 0 DBSIZE 2>/dev/null | grep -oE '[0-9]+' || echo "unknown")
+          echo "Production Redis (db 0) key count: $KEY_COUNT"
+          echo ""
+          echo "--- BullMQ Queue Keys ---"
+          redis-cli -a "$REDIS_PASSWORD" -n 0 KEYS "bull:*" 2>/dev/null | head -20 || echo "No BullMQ keys found"
+
+      - name: 🚨 FINAL WARNING & PAUSE 🚨
+        run: |
+          echo "*********************************************************************"
+          echo "WARNING: YOU ARE ABOUT TO FLUSH PRODUCTION REDIS DATA."
+          echo "Flush type: ${{ gitea.event.inputs.flush_type }}"
+          echo ""
+          if [ "${{ gitea.event.inputs.flush_type }}" = "entire-database" ]; then
+            echo "This will DELETE ALL Redis data including sessions, caches, and queues!"
+          else
+            echo "This will DELETE ALL BullMQ queue data (pending jobs, failed jobs, etc.)"
+          fi
+          echo ""
+          echo "This action is IRREVERSIBLE. Press Ctrl+C in the runner terminal NOW to cancel."
+          echo "Sleeping for 10 seconds..."
+          echo "*********************************************************************"
+          sleep 10
+
+      - name: Flush BullMQ Queues Only
+        if: ${{ gitea.event.inputs.flush_type == 'queues-only' }}
+        env:
+          REDIS_URL: 'redis://localhost:6379/0'
+        run: |
+          echo "--- Obliterating BullMQ queues using Node.js ---"
+          node -e "
+            const { Queue } = require('bullmq');
+            const IORedis = require('ioredis');
+
+            const connection = new IORedis(process.env.REDIS_URL, {
+              maxRetriesPerRequest: null,
+              password: process.env.REDIS_PASSWORD,
+            });
+
+            const queueNames = [
+              'flyer-processing',
+              'email-sending',
+              'analytics-reporting',
+              'weekly-analytics-reporting',
+              'file-cleanup',
+              'token-cleanup'
+            ];
+
+            (async () => {
+              for (const name of queueNames) {
+                try {
+                  const queue = new Queue(name, { connection });
+                  const counts = await queue.getJobCounts();
+                  console.log('Queue \"' + name + '\" before obliterate:', JSON.stringify(counts));
+                  await queue.obliterate({ force: true });
+                  console.log('✅ Obliterated queue: ' + name);
+                  await queue.close();
+                } catch (err) {
+                  console.error('⚠️ Failed to obliterate queue ' + name + ':', err.message);
+                }
+              }
+              await connection.quit();
+              console.log('✅ All BullMQ queues obliterated.');
+            })();
+          "
+
+      - name: Flush Entire Redis Database
+        if: ${{ gitea.event.inputs.flush_type == 'entire-database' }}
+        run: |
+          echo "--- Flushing entire Redis database 0 (production) ---"
+          redis-cli -a "$REDIS_PASSWORD" -n 0 FLUSHDB 2>/dev/null && echo "✅ Redis database 0 flushed successfully." || echo "❌ Redis flush failed"
+
+      - name: Verify Flush Results
+        run: |
+          echo "--- Redis Database 0 (Production) State After Flush ---"
+          KEY_COUNT=$(redis-cli -a "$REDIS_PASSWORD" -n 0 DBSIZE 2>/dev/null | grep -oE '[0-9]+' || echo "unknown")
+          echo "Production Redis (db 0) key count after flush: $KEY_COUNT"
+          echo ""
+          echo "--- Remaining BullMQ Queue Keys ---"
+          BULL_KEYS=$(redis-cli -a "$REDIS_PASSWORD" -n 0 KEYS "bull:*" 2>/dev/null | wc -l || echo "0")
+          echo "BullMQ key count: $BULL_KEYS"
+
+          if [ "${{ gitea.event.inputs.flush_type }}" = "queues-only" ] && [ "$BULL_KEYS" -gt 0 ]; then
+            echo "⚠️ Warning: Some BullMQ keys may still exist. This can happen if new jobs were added during the flush."
+          fi
+
+      - name: Summary
+        run: |
+          echo ""
+          echo "=========================================="
+          echo "PRODUCTION REDIS FLUSH COMPLETE"
+          echo "=========================================="
+          echo "Flush type: ${{ gitea.event.inputs.flush_type }}"
+          echo "Timestamp: $(date -u '+%Y-%m-%d %H:%M:%S UTC')"
+          echo ""
+          echo "NOTE: If you flushed queues, any pending jobs (flyer processing,"
+          echo "emails, analytics, etc.) have been permanently deleted."
+          echo ""
+          echo "The production workers will automatically start processing"
+          echo "new jobs as they are added to the queues."
+          echo "=========================================="

.husky/pre-commit

@@ -0,0 +1 @@
+npx lint-staged

.lintstagedrc.json

@@ -0,0 +1,4 @@
+{
+  "*.{js,jsx,ts,tsx}": ["eslint --fix", "prettier --write"],
+  "*.{json,md,css,html,yml,yaml}": ["prettier --write"]
+}

.prettierignore

@@ -0,0 +1,41 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+build/
+.cache/
+
+# Coverage reports
+coverage/
+.coverage/
+
+# IDE and editor configs
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Logs
+*.log
+logs/
+
+# Environment files (may contain secrets)
+.env*
+!.env.example
+
+# Lock files (managed by package managers)
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+
+# Generated files
+*.min.js
+*.min.css
+
+# Git directory
+.git/
+.gitea/
+
+# Test artifacts
+__snapshots__/

Dockerfile.dev

@@ -1,31 +1,60 @@
-# Use Ubuntu 22.04 (LTS) as the base image to match production
+# Dockerfile.dev
+# ============================================================================
+# DEVELOPMENT DOCKERFILE
+# ============================================================================
+# This Dockerfile creates a development environment that matches production
+# as closely as possible while providing the tools needed for development.
+#
+# Base: Ubuntu 22.04 (LTS) - matches production server
+# Node: v20.x (LTS) - matches production
+# Includes: PostgreSQL client, Redis CLI, build tools
+# ============================================================================
+
 FROM ubuntu:22.04
 
 # Set environment variables to non-interactive to avoid prompts during installation
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Update package lists and install essential tools
-# - curl: for downloading Node.js setup script
+# ============================================================================
+# Install System Dependencies
+# ============================================================================
+# - curl: for downloading Node.js setup script and health checks
 # - git: for version control operations
 # - build-essential: for compiling native Node.js modules (node-gyp)
 # - python3: required by some Node.js build tools
+# - postgresql-client: for psql CLI (database initialization)
+# - redis-tools: for redis-cli (health checks)
 RUN apt-get update && apt-get install -y \
     curl \
     git \
     build-essential \
     python3 \
+    postgresql-client \
+    redis-tools \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Node.js 20.x (LTS) from NodeSource
+# ============================================================================
+# Install Node.js 20.x (LTS)
+# ============================================================================
 RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
     && apt-get install -y nodejs
 
-# Set the working directory inside the container
+# ============================================================================
+# Set Working Directory
+# ============================================================================
 WORKDIR /app
 
-# Set default environment variables for development
+# ============================================================================
+# Environment Configuration
+# ============================================================================
+# Default environment variables for development
 ENV NODE_ENV=development
+# Increase Node.js memory limit for large builds
 ENV NODE_OPTIONS='--max-old-space-size=8192'
 
-# Default command keeps the container running so you can attach to it
-CMD ["bash"]
+# ============================================================================
+# Default Command
+# ============================================================================
+# Keep container running so VS Code can attach.
+# Actual commands (npm run dev, etc.) are run via devcontainer.json.
+CMD ["bash"]

compose.dev.yml

@@ -1,8 +1,36 @@
+# compose.dev.yml
+# ============================================================================
+# DEVELOPMENT DOCKER COMPOSE CONFIGURATION
+# ============================================================================
+# This file defines the local development environment using Docker/Podman.
+#
+# Services:
+#   - app: Node.js application (API + Frontend)
+#   - postgres: PostgreSQL 15 with PostGIS extension
+#   - redis: Redis for caching and job queues
+#
+# Usage:
+#   Start all services:     podman-compose -f compose.dev.yml up -d
+#   Stop all services:      podman-compose -f compose.dev.yml down
+#   View logs:              podman-compose -f compose.dev.yml logs -f
+#   Reset everything:       podman-compose -f compose.dev.yml down -v
+#
+# VS Code Dev Containers:
+#   This file is referenced by .devcontainer/devcontainer.json for seamless
+#   VS Code integration. Open the project in VS Code and use "Reopen in Container".
+# ============================================================================
+
 version: '3.8'
 
 services:
+  # ===================
+  # Application Service
+  # ===================
   app:
     container_name: flyer-crawler-dev
+    # Use pre-built image if available, otherwise build from Dockerfile.dev
+    # To build: podman build -f Dockerfile.dev -t flyer-crawler-dev:latest .
+    image: localhost/flyer-crawler-dev:latest
     build:
       context: .
       dockerfile: Dockerfile.dev
@@ -16,21 +44,44 @@ services:
       - '3000:3000' # Frontend (Vite default)
       - '3001:3001' # Backend API
     environment:
+      # Core settings
       - NODE_ENV=development
+      # Database - use service name for Docker networking
       - DB_HOST=postgres
+      - DB_PORT=5432
       - DB_USER=postgres
       - DB_PASSWORD=postgres
       - DB_NAME=flyer_crawler_dev
+      # Redis - use service name for Docker networking
       - REDIS_URL=redis://redis:6379
-      # Add other secrets here or use a .env file
+      - REDIS_HOST=redis
+      - REDIS_PORT=6379
+      # Frontend URL for CORS
+      - FRONTEND_URL=http://localhost:3000
+      # Default JWT secret for development (override in production!)
+      - JWT_SECRET=dev-jwt-secret-change-in-production
+      # Worker settings
+      - WORKER_LOCK_DURATION=120000
     depends_on:
-      - postgres
-      - redis
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
     # Keep container running so VS Code can attach
     command: tail -f /dev/null
+    # Healthcheck for the app (once it's running)
+    healthcheck:
+      test: ['CMD', 'curl', '-f', 'http://localhost:3001/api/health', '||', 'exit', '0']
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
 
+  # ===================
+  # PostgreSQL Database
+  # ===================
   postgres:
-    image: docker.io/library/postgis/postgis:15-3.4
+    image: docker.io/postgis/postgis:15-3.4
     container_name: flyer-crawler-postgres
     ports:
       - '5432:5432'
@@ -38,15 +89,54 @@ services:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres
       POSTGRES_DB: flyer_crawler_dev
+      # Optimize for development
+      POSTGRES_INITDB_ARGS: '--encoding=UTF8 --locale=C'
     volumes:
       - postgres_data:/var/lib/postgresql/data
+      # Mount the extensions init script to run on first database creation
+      # The 00- prefix ensures it runs before any other init scripts
+      - ./sql/00-init-extensions.sql:/docker-entrypoint-initdb.d/00-init-extensions.sql:ro
+    # Healthcheck ensures postgres is ready before app starts
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U postgres -d flyer_crawler_dev']
+      interval: 5s
+      timeout: 5s
+      retries: 10
+      start_period: 10s
 
+  # ===================
+  # Redis Cache/Queue
+  # ===================
   redis:
     image: docker.io/library/redis:alpine
     container_name: flyer-crawler-redis
     ports:
       - '6379:6379'
+    volumes:
+      - redis_data:/data
+    # Healthcheck ensures redis is ready before app starts
+    healthcheck:
+      test: ['CMD', 'redis-cli', 'ping']
+      interval: 5s
+      timeout: 5s
+      retries: 10
+      start_period: 5s
+    # Enable persistence for development data
+    command: redis-server --appendonly yes
 
+# ===================
+# Named Volumes
+# ===================
 volumes:
   postgres_data:
+    name: flyer-crawler-postgres-data
+  redis_data:
+    name: flyer-crawler-redis-data
   node_modules_data:
+    name: flyer-crawler-node-modules
+
+# ===================
+# Network Configuration
+# ===================
+# All services are on the default bridge network.
+# Use service names (postgres, redis) as hostnames.

docs/adr/0001-standardized-error-handling.md

@@ -4,6 +4,8 @@
 
 **Status**: Accepted
 
+**Implemented**: 2026-01-07
+
 ## Context
 
 Our application has experienced a recurring pattern of bugs and brittle tests related to error handling, specifically for "resource not found" scenarios. The root causes identified are:
@@ -41,3 +43,86 @@ We will adopt a strict, consistent error-handling contract for the service and r
 
 **Initial Refactoring**: Requires a one-time effort to audit and refactor all existing repository methods to conform to this new standard.
 **Convention Adherence**: Developers must be aware of and adhere to this convention. This ADR serves as the primary documentation for this pattern.
+
+## Implementation Details
+
+### Custom Error Types
+
+All custom errors are defined in `src/services/db/errors.db.ts`:
+
+| Error Class                      | HTTP Status | PostgreSQL Code | Use Case                        |
+| -------------------------------- | ----------- | --------------- | ------------------------------- |
+| `NotFoundError`                  | 404         | -               | Resource not found              |
+| `UniqueConstraintError`          | 409         | 23505           | Duplicate key violation         |
+| `ForeignKeyConstraintError`      | 400         | 23503           | Referenced record doesn't exist |
+| `NotNullConstraintError`         | 400         | 23502           | Required field is null          |
+| `CheckConstraintError`           | 400         | 23514           | Check constraint violated       |
+| `InvalidTextRepresentationError` | 400         | 22P02           | Invalid data type format        |
+| `NumericValueOutOfRangeError`    | 400         | 22003           | Numeric overflow                |
+| `ValidationError`                | 400         | -               | Request validation failed       |
+| `ForbiddenError`                 | 403         | -               | Access denied                   |
+
+### Error Handler Middleware
+
+The centralized error handler in `src/middleware/errorHandler.ts`:
+
+1. Catches all errors from route handlers
+2. Maps custom error types to HTTP status codes
+3. Logs errors with appropriate severity (warn for 4xx, error for 5xx)
+4. Returns consistent JSON error responses
+5. Includes error ID for server errors (for support correlation)
+
+### Usage Pattern
+
+```typescript
+// In repository (throws NotFoundError)
+async function getUserById(id: number): Promise<User> {
+  const result = await pool.query('SELECT * FROM users WHERE id = $1', [id]);
+  if (result.rows.length === 0) {
+    throw new NotFoundError(`User with ID ${id} not found.`);
+  }
+  return result.rows[0];
+}
+
+// In route handler (simple try/catch)
+router.get('/:id', async (req, res, next) => {
+  try {
+    const user = await getUserById(req.params.id);
+    res.json(user);
+  } catch (error) {
+    next(error); // errorHandler maps NotFoundError to 404
+  }
+});
+```
+
+### Centralized Error Handler Helper
+
+The `handleDbError` function in `src/services/db/errors.db.ts` provides centralized PostgreSQL error handling:
+
+```typescript
+import { handleDbError } from './errors.db';
+
+try {
+  await pool.query('INSERT INTO users (email) VALUES ($1)', [email]);
+} catch (error) {
+  handleDbError(
+    error,
+    logger,
+    'Failed to create user',
+    { email },
+    {
+      uniqueMessage: 'A user with this email already exists.',
+      defaultMessage: 'Failed to create user.',
+    },
+  );
+}
+```
+
+## Key Files
+
+- `src/services/db/errors.db.ts` - Custom error classes and `handleDbError` utility
+- `src/middleware/errorHandler.ts` - Centralized Express error handling middleware
+
+## Related ADRs
+
+- [ADR-034](./0034-repository-pattern-standards.md) - Repository Pattern Standards (extends this ADR)

docs/adr/0002-standardized-transaction-management.md

@@ -60,3 +60,109 @@ async function registerUserAndCreateDefaultList(userData) {
 
 **Learning Curve**: Developers will need to learn and adopt the `withTransaction` pattern for all transactional database work.
 **Refactoring Effort**: Existing methods that manually manage transactions (`createUser`, `createBudget`, etc.) will need to be refactored to use the new pattern.
+
+## Implementation Details
+
+### The `withTransaction` Helper
+
+Located in `src/services/db/connection.db.ts`:
+
+```typescript
+export async function withTransaction<T>(callback: (client: PoolClient) => Promise<T>): Promise<T> {
+  const client = await getPool().connect();
+  try {
+    await client.query('BEGIN');
+    const result = await callback(client);
+    await client.query('COMMIT');
+    return result;
+  } catch (error) {
+    await client.query('ROLLBACK');
+    logger.error({ err: error }, 'Transaction failed, rolling back.');
+    throw error;
+  } finally {
+    client.release();
+  }
+}
+```
+
+### Repository Pattern for Transaction Support
+
+Repository methods accept an optional `PoolClient` parameter:
+
+```typescript
+// Function-based approach
+export async function createUser(userData: CreateUserInput, client?: PoolClient): Promise<User> {
+  const queryable = client || getPool();
+  const result = await queryable.query<User>(
+    'INSERT INTO users (email, password_hash) VALUES ($1, $2) RETURNING *',
+    [userData.email, userData.passwordHash],
+  );
+  return result.rows[0];
+}
+```
+
+### Transactional Service Example
+
+```typescript
+// src/services/authService.ts
+import { withTransaction } from './db/connection.db';
+import { createUser, createProfile } from './db';
+
+export async function registerUserWithProfile(
+  email: string,
+  password: string,
+  profileData: ProfileInput,
+): Promise<UserWithProfile> {
+  return withTransaction(async (client) => {
+    // All operations use the same transactional client
+    const user = await createUser({ email, password }, client);
+    const profile = await createProfile(
+      {
+        userId: user.user_id,
+        ...profileData,
+      },
+      client,
+    );
+
+    return { user, profile };
+  });
+}
+```
+
+### Services Using `withTransaction`
+
+| Service                   | Function                | Operations                          |
+| ------------------------- | ----------------------- | ----------------------------------- |
+| `authService`             | `registerAndLoginUser`  | Create user + profile + preferences |
+| `userService`             | `updateUserWithProfile` | Update user + profile atomically    |
+| `flyerPersistenceService` | `saveFlyer`             | Create flyer + items + metadata     |
+| `shoppingService`         | `createListWithItems`   | Create list + initial items         |
+| `gamificationService`     | `awardAchievement`      | Create achievement + update points  |
+
+### Connection Pool Configuration
+
+```typescript
+const poolConfig: PoolConfig = {
+  max: 20, // Max clients in pool
+  idleTimeoutMillis: 30000, // Close idle clients after 30s
+  connectionTimeoutMillis: 2000, // Fail connect after 2s
+};
+```
+
+### Pool Status Monitoring
+
+```typescript
+import { getPoolStatus } from './db/connection.db';
+
+const status = getPoolStatus();
+// { totalCount: 20, idleCount: 15, waitingCount: 0 }
+```
+
+## Key Files
+
+- `src/services/db/connection.db.ts` - `getPool()`, `withTransaction()`, `getPoolStatus()`
+
+## Related ADRs
+
+- [ADR-001](./0001-standardized-error-handling.md) - Error handling within transactions
+- [ADR-034](./0034-repository-pattern-standards.md) - Repository patterns for transaction participation

docs/adr/0003-standardized-input-validation-using-middleware.md

@@ -79,3 +79,140 @@ router.get('/:id', validateRequest(getFlyerSchema), async (req, res, next) => {
 **New Dependency**: Introduces `zod` as a new project dependency.
 **Learning Curve**: Developers need to learn the `zod` schema definition syntax.
 **Refactoring Effort**: Requires a one-time effort to create schemas and refactor all existing routes to use the `validateRequest` middleware.
+
+## Implementation Details
+
+### The `validateRequest` Middleware
+
+Located in `src/middleware/validation.middleware.ts`:
+
+```typescript
+export const validateRequest =
+  (schema: ZodObject<z.ZodRawShape>) => async (req: Request, res: Response, next: NextFunction) => {
+    try {
+      const { params, query, body } = await schema.parseAsync({
+        params: req.params,
+        query: req.query,
+        body: req.body,
+      });
+
+      // Merge parsed data back into request
+      Object.keys(req.params).forEach((key) => delete req.params[key]);
+      Object.assign(req.params, params);
+      Object.keys(req.query).forEach((key) => delete req.query[key]);
+      Object.assign(req.query, query);
+      req.body = body;
+
+      return next();
+    } catch (error) {
+      if (error instanceof ZodError) {
+        const validationIssues = error.issues.map((issue) => ({
+          ...issue,
+          path: issue.path.map((p) => String(p)),
+        }));
+        return next(new ValidationError(validationIssues));
+      }
+      return next(error);
+    }
+  };
+```
+
+### Common Zod Patterns
+
+```typescript
+import { z } from 'zod';
+import { requiredString } from '../utils/zodUtils';
+
+// String that coerces to positive integer (for ID params)
+const idParam = z.string().pipe(z.coerce.number().int().positive());
+
+// Pagination query params with defaults
+const paginationQuery = z.object({
+  limit: z.coerce.number().int().positive().max(100).default(20),
+  offset: z.coerce.number().int().nonnegative().default(0),
+});
+
+// Email with sanitization
+const emailSchema = z.string().trim().toLowerCase().email('A valid email is required.');
+
+// Password with strength validation
+const passwordSchema = z
+  .string()
+  .trim()
+  .min(8, 'Password must be at least 8 characters long.')
+  .superRefine((password, ctx) => {
+    const strength = validatePasswordStrength(password);
+    if (!strength.isValid) ctx.addIssue({ code: 'custom', message: strength.feedback });
+  });
+
+// Optional string that converts empty string to undefined
+const optionalString = z.preprocess(
+  (val) => (val === '' ? undefined : val),
+  z.string().trim().optional(),
+);
+```
+
+### Routes Using `validateRequest`
+
+All API routes use the validation middleware:
+
+| Router                   | Schemas Defined | Validated Endpoints                                                              |
+| ------------------------ | --------------- | -------------------------------------------------------------------------------- |
+| `auth.routes.ts`         | 5               | `/register`, `/login`, `/forgot-password`, `/reset-password`, `/change-password` |
+| `user.routes.ts`         | 4               | `/profile`, `/address`, `/preferences`, `/notifications`                         |
+| `flyer.routes.ts`        | 6               | `GET /:id`, `GET /`, `GET /:id/items`, `DELETE /:id`                             |
+| `budget.routes.ts`       | 5               | `/`, `/:id`, `/batch`, `/categories`                                             |
+| `recipe.routes.ts`       | 4               | `GET /`, `GET /:id`, `POST /`, `PATCH /:id`                                      |
+| `admin.routes.ts`        | 8               | Various admin endpoints                                                          |
+| `ai.routes.ts`           | 3               | `/upload-and-process`, `/analyze`, `/jobs/:jobId/status`                         |
+| `gamification.routes.ts` | 3               | `/achievements`, `/leaderboard`, `/points`                                       |
+
+### Validation Error Response Format
+
+When validation fails, the `errorHandler` returns:
+
+```json
+{
+  "message": "The request data is invalid.",
+  "errors": [
+    {
+      "path": ["body", "email"],
+      "message": "A valid email is required."
+    },
+    {
+      "path": ["body", "password"],
+      "message": "Password must be at least 8 characters long."
+    }
+  ]
+}
+```
+
+HTTP Status: `400 Bad Request`
+
+### Zod Utility Functions
+
+Located in `src/utils/zodUtils.ts`:
+
+```typescript
+// String that rejects empty strings
+export const requiredString = (message?: string) =>
+  z.string().min(1, message || 'This field is required.');
+
+// Number from string with validation
+export const numericString = z.string().pipe(z.coerce.number());
+
+// Boolean from string ('true'/'false')
+export const booleanString = z.enum(['true', 'false']).transform((v) => v === 'true');
+```
+
+## Key Files
+
+- `src/middleware/validation.middleware.ts` - The `validateRequest` middleware
+- `src/services/db/errors.db.ts` - `ValidationError` class definition
+- `src/middleware/errorHandler.ts` - Error formatting for validation errors
+- `src/utils/zodUtils.ts` - Reusable Zod schema utilities
+
+## Related ADRs
+
+- [ADR-001](./0001-standardized-error-handling.md) - Error handling for validation errors
+- [ADR-032](./0032-rate-limiting-strategy.md) - Rate limiting applied alongside validation

docs/adr/0004-standardized-application-wide-structured-logging.md

@@ -86,3 +86,219 @@ router.get('/:id', async (req, res, next) => {
 
 **Refactoring Effort**: Requires adding the `requestLogger` middleware and refactoring all routes and services to use `req.log` instead of the global `logger`.
 **Slight Performance Overhead**: Creating a child logger for every request adds a minor performance cost, though this is negligible for most modern logging libraries.
+
+## Implementation Details
+
+### Logger Configuration
+
+Located in `src/services/logger.server.ts`:
+
+```typescript
+import pino from 'pino';
+
+const isProduction = process.env.NODE_ENV === 'production';
+const isTest = process.env.NODE_ENV === 'test';
+
+export const logger = pino({
+  level: isProduction ? 'info' : 'debug',
+  transport:
+    isProduction || isTest
+      ? undefined
+      : {
+          target: 'pino-pretty',
+          options: {
+            colorize: true,
+            translateTime: 'SYS:standard',
+            ignore: 'pid,hostname',
+          },
+        },
+  redact: {
+    paths: [
+      'req.headers.authorization',
+      'req.headers.cookie',
+      '*.body.password',
+      '*.body.newPassword',
+      '*.body.currentPassword',
+      '*.body.confirmPassword',
+      '*.body.refreshToken',
+      '*.body.token',
+    ],
+    censor: '[REDACTED]',
+  },
+});
+```
+
+### Request Logger Middleware
+
+Located in `server.ts`:
+
+```typescript
+const requestLogger = (req: Request, res: Response, next: NextFunction) => {
+  const requestId = randomUUID();
+  const user = req.user as UserProfile | undefined;
+  const start = process.hrtime();
+
+  // Create request-scoped logger
+  req.log = logger.child({
+    request_id: requestId,
+    user_id: user?.user.user_id,
+    ip_address: req.ip,
+  });
+
+  req.log.debug({ method: req.method, originalUrl: req.originalUrl }, 'INCOMING');
+
+  res.on('finish', () => {
+    const duration = getDurationInMilliseconds(start);
+    const { statusCode, statusMessage } = res;
+    const logDetails = {
+      user_id: (req.user as UserProfile | undefined)?.user.user_id,
+      method: req.method,
+      originalUrl: req.originalUrl,
+      statusCode,
+      statusMessage,
+      duration: duration.toFixed(2),
+    };
+
+    // Include request details for failed requests (for debugging)
+    if (statusCode >= 400) {
+      logDetails.req = { headers: req.headers, body: req.body };
+    }
+
+    if (statusCode >= 500) req.log.error(logDetails, 'Request completed with server error');
+    else if (statusCode >= 400) req.log.warn(logDetails, 'Request completed with client error');
+    else req.log.info(logDetails, 'Request completed successfully');
+  });
+
+  next();
+};
+
+app.use(requestLogger);
+```
+
+### TypeScript Support
+
+The `req.log` property is typed via declaration merging in `src/types/express.d.ts`:
+
+```typescript
+import { Logger } from 'pino';
+
+declare global {
+  namespace Express {
+    export interface Request {
+      log: Logger;
+    }
+  }
+}
+```
+
+### Automatic Sensitive Data Redaction
+
+The Pino logger automatically redacts sensitive fields:
+
+```json
+// Before redaction
+{
+  "body": {
+    "email": "user@example.com",
+    "password": "secret123",
+    "newPassword": "newsecret456"
+  }
+}
+
+// After redaction (in logs)
+{
+  "body": {
+    "email": "user@example.com",
+    "password": "[REDACTED]",
+    "newPassword": "[REDACTED]"
+  }
+}
+```
+
+### Log Levels by Scenario
+
+| Level | HTTP Status | Scenario                                           |
+| ----- | ----------- | -------------------------------------------------- |
+| DEBUG | Any         | Request incoming, internal state, development info |
+| INFO  | 2xx         | Successful requests, business events               |
+| WARN  | 4xx         | Client errors, validation failures, not found      |
+| ERROR | 5xx         | Server errors, unhandled exceptions                |
+
+### Service Layer Logging
+
+Services accept the request-scoped logger as an optional parameter:
+
+```typescript
+export async function registerUser(email: string, password: string, reqLog?: Logger) {
+  const log = reqLog || logger; // Fall back to global logger
+
+  log.info({ email }, 'Registering new user');
+  // ... implementation
+
+  log.debug({ userId: user.user_id }, 'User created successfully');
+  return user;
+}
+
+// In route handler
+router.post('/register', async (req, res, next) => {
+  await authService.registerUser(req.body.email, req.body.password, req.log);
+});
+```
+
+### Log Output Format
+
+**Development** (pino-pretty):
+
+```text
+[2026-01-09 12:34:56.789] INFO (request_id=abc123): Request completed successfully
+    method: "GET"
+    originalUrl: "/api/flyers"
+    statusCode: 200
+    duration: "45.23"
+```
+
+**Production** (JSON):
+
+```json
+{
+  "level": 30,
+  "time": 1704812096789,
+  "request_id": "abc123",
+  "user_id": "user_456",
+  "ip_address": "192.168.1.1",
+  "method": "GET",
+  "originalUrl": "/api/flyers",
+  "statusCode": 200,
+  "duration": "45.23",
+  "msg": "Request completed successfully"
+}
+```
+
+### Routes Using `req.log`
+
+All route files have been migrated to use the request-scoped logger:
+
+- `src/routes/auth.routes.ts`
+- `src/routes/user.routes.ts`
+- `src/routes/flyer.routes.ts`
+- `src/routes/ai.routes.ts`
+- `src/routes/admin.routes.ts`
+- `src/routes/budget.routes.ts`
+- `src/routes/recipe.routes.ts`
+- `src/routes/gamification.routes.ts`
+- `src/routes/personalization.routes.ts`
+- `src/routes/stats.routes.ts`
+- `src/routes/health.routes.ts`
+- `src/routes/system.routes.ts`
+
+## Key Files
+
+- `src/services/logger.server.ts` - Pino logger configuration
+- `src/services/logger.client.ts` - Client-side logger (for frontend)
+- `src/types/express.d.ts` - TypeScript declaration for `req.log`
+- `server.ts` - Request logger middleware
+
+## Related ADRs
+
+- [ADR-001](./0001-standardized-error-handling.md) - Error handler uses `req.log` for error logging
+- [ADR-026](./0026-standardized-client-side-structured-logging.md) - Client-side logging strategy

docs/adr/0006-background-job-processing-and-task-queues.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
 
 ## Context
 
@@ -16,3 +16,82 @@ We will implement a dedicated background job processing system using a task queu
 
 **Positive**: Decouples the API from heavy processing, allows for retries on failure, and enables scaling the processing workers independently. Increases application reliability and resilience.
 **Negative**: Introduces a new dependency (Redis) into the infrastructure. Requires refactoring of the flyer processing logic to work within a job queue structure.
+
+## Implementation Details
+
+### Queue Infrastructure
+
+The implementation uses **BullMQ v5.65.1** with **ioredis v5.8.2** for Redis connectivity. Six distinct queues handle different job types:
+
+| Queue Name                   | Purpose                     | Retry Attempts | Backoff Strategy       |
+| ---------------------------- | --------------------------- | -------------- | ---------------------- |
+| `flyer-processing`           | OCR/AI processing of flyers | 3              | Exponential (5s base)  |
+| `email-sending`              | Email delivery              | 5              | Exponential (10s base) |
+| `analytics-reporting`        | Daily report generation     | 2              | Exponential (60s base) |
+| `weekly-analytics-reporting` | Weekly report generation    | 2              | Exponential (1h base)  |
+| `file-cleanup`               | Temporary file cleanup      | 3              | Exponential (30s base) |
+| `token-cleanup`              | Expired token removal       | 2              | Exponential (1h base)  |
+
+### Key Files
+
+- `src/services/queues.server.ts` - Queue definitions and configuration
+- `src/services/workers.server.ts` - Worker implementations with configurable concurrency
+- `src/services/redis.server.ts` - Redis connection management
+- `src/services/queueService.server.ts` - Queue lifecycle and graceful shutdown
+- `src/services/flyerProcessingService.server.ts` - 5-stage flyer processing pipeline
+- `src/types/job-data.ts` - TypeScript interfaces for all job data types
+
+### API Design
+
+Endpoints for long-running tasks return **202 Accepted** immediately with a job ID:
+
+```text
+POST /api/ai/upload-and-process → 202 { jobId: "..." }
+GET  /api/ai/jobs/:jobId/status → { state: "...", progress: ... }
+```
+
+### Worker Configuration
+
+Workers are configured via environment variables:
+
+- `WORKER_CONCURRENCY` - Flyer processing parallelism (default: 1)
+- `EMAIL_WORKER_CONCURRENCY` - Email worker parallelism (default: 10)
+- `ANALYTICS_WORKER_CONCURRENCY` - Analytics worker parallelism (default: 1)
+- `CLEANUP_WORKER_CONCURRENCY` - Cleanup worker parallelism (default: 10)
+
+### Monitoring
+
+- **Bull Board UI** available at `/api/admin/jobs` for admin users
+- Worker status endpoint: `GET /api/admin/workers/status`
+- Queue status endpoint: `GET /api/admin/queues/status`
+
+### Graceful Shutdown
+
+Both API and worker processes implement graceful shutdown with a 30-second timeout, ensuring in-flight jobs complete before process termination.
+
+## Compliance Notes
+
+### Deprecated Synchronous Endpoints
+
+The following endpoints process flyers synchronously and are **deprecated**:
+
+- `POST /api/ai/upload-legacy` - For integration testing only
+- `POST /api/ai/flyers/process` - Legacy workflow, should migrate to queue-based approach
+
+New integrations MUST use `POST /api/ai/upload-and-process` for queue-based processing.
+
+### Email Handling
+
+- **Bulk emails** (deal notifications): Enqueued via `emailQueue`
+- **Transactional emails** (password reset): Sent synchronously for immediate user feedback
+
+## Future Enhancements
+
+Potential improvements for consideration:
+
+1. **Dead Letter Queue (DLQ)**: Move permanently failed jobs to a dedicated queue for analysis
+2. **Job Priority Levels**: Allow priority-based processing for different job types
+3. **Real-time Progress**: WebSocket/SSE for live job progress updates to clients
+4. **Per-Queue Rate Limiting**: Throttle job processing based on external API limits
+5. **Job Dependencies**: Support for jobs that depend on completion of other jobs
+6. **Prometheus Metrics**: Export queue metrics for observability dashboards

docs/adr/0007-configuration-and-secrets-management.md

@@ -2,7 +2,9 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
 
 ## Context
 
@@ -16,3 +18,216 @@ We will introduce a centralized, schema-validated configuration service. We will
 
 **Positive**: Improves application reliability and developer experience by catching configuration errors at startup rather than at runtime. Provides a single source of truth for all required configuration.
 **Negative**: Adds a small amount of boilerplate for defining the configuration schema. Requires a one-time effort to refactor all `process.env` access points to use the new configuration service.
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ **Centralized Configuration Schema** - Zod-based validation in `src/config/env.ts`
+- ✅ **Type-Safe Access** - Full TypeScript types for all configuration
+- ✅ **Fail-Fast Startup** - Clear error messages for missing/invalid config
+- ✅ **Environment Helpers** - `isProduction`, `isTest`, `isDevelopment` exports
+- ✅ **Service Configuration Helpers** - `isSmtpConfigured`, `isAiConfigured`, etc.
+
+### Migration Status
+
+- ⏳ Gradual migration of `process.env` access to `config.*` in progress
+- Legacy `process.env` access still works during transition
+
+## Implementation Details
+
+### Configuration Schema
+
+The configuration is organized into logical groups:
+
+```typescript
+import { config, isProduction, isTest } from './config/env';
+
+// Database
+config.database.host; // DB_HOST
+config.database.port; // DB_PORT (default: 5432)
+config.database.user; // DB_USER
+config.database.password; // DB_PASSWORD
+config.database.name; // DB_NAME
+
+// Redis
+config.redis.url; // REDIS_URL
+config.redis.password; // REDIS_PASSWORD (optional)
+
+// Authentication
+config.auth.jwtSecret; // JWT_SECRET (min 32 chars)
+config.auth.jwtSecretPrevious; // JWT_SECRET_PREVIOUS (for rotation)
+
+// SMTP (all optional - email degrades gracefully)
+config.smtp.host; // SMTP_HOST
+config.smtp.port; // SMTP_PORT (default: 587)
+config.smtp.user; // SMTP_USER
+config.smtp.pass; // SMTP_PASS
+config.smtp.secure; // SMTP_SECURE (default: false)
+config.smtp.fromEmail; // SMTP_FROM_EMAIL
+
+// AI Services
+config.ai.geminiApiKey; // GEMINI_API_KEY
+config.ai.geminiRpm; // GEMINI_RPM (default: 5)
+config.ai.priceQualityThreshold; // AI_PRICE_QUALITY_THRESHOLD (default: 0.5)
+
+// Google Services
+config.google.mapsApiKey; // GOOGLE_MAPS_API_KEY (optional)
+config.google.clientId; // GOOGLE_CLIENT_ID (optional)
+config.google.clientSecret; // GOOGLE_CLIENT_SECRET (optional)
+
+// Worker Configuration
+config.worker.concurrency; // WORKER_CONCURRENCY (default: 1)
+config.worker.lockDuration; // WORKER_LOCK_DURATION (default: 30000)
+config.worker.emailConcurrency; // EMAIL_WORKER_CONCURRENCY (default: 10)
+config.worker.analyticsConcurrency; // ANALYTICS_WORKER_CONCURRENCY (default: 1)
+config.worker.cleanupConcurrency; // CLEANUP_WORKER_CONCURRENCY (default: 10)
+config.worker.weeklyAnalyticsConcurrency; // WEEKLY_ANALYTICS_WORKER_CONCURRENCY (default: 1)
+
+// Server
+config.server.nodeEnv; // NODE_ENV (development/production/test)
+config.server.port; // PORT (default: 3001)
+config.server.frontendUrl; // FRONTEND_URL
+config.server.baseUrl; // BASE_URL
+config.server.storagePath; // STORAGE_PATH (default: /var/www/.../flyer-images)
+```
+
+### Convenience Helpers
+
+```typescript
+import { isProduction, isTest, isDevelopment, isSmtpConfigured } from './config/env';
+
+// Environment checks
+if (isProduction) {
+  // Production-only logic
+}
+
+// Service availability checks
+if (isSmtpConfigured) {
+  await sendEmail(...);
+} else {
+  logger.warn('Email not configured, skipping notification');
+}
+```
+
+### Fail-Fast Error Messages
+
+When configuration is invalid, the application exits with a clear error:
+
+```text
+╔════════════════════════════════════════════════════════════════╗
+║           CONFIGURATION ERROR - APPLICATION STARTUP            ║
+╚════════════════════════════════════════════════════════════════╝
+
+The following environment variables are missing or invalid:
+
+  - database.host: DB_HOST is required
+  - auth.jwtSecret: JWT_SECRET must be at least 32 characters for security
+
+Please check your .env file or environment configuration.
+See ADR-007 for the complete list of required environment variables.
+```
+
+### Usage Example
+
+```typescript
+// Before (direct process.env access)
+const pool = new Pool({
+  host: process.env.DB_HOST,
+  port: parseInt(process.env.DB_PORT || '5432', 10),
+  user: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_NAME,
+});
+
+// After (type-safe config access)
+import { config } from './config/env';
+
+const pool = new Pool({
+  host: config.database.host,
+  port: config.database.port,
+  user: config.database.user,
+  password: config.database.password,
+  database: config.database.name,
+});
+```
+
+## Required Environment Variables
+
+### Critical (Application will not start without these)
+
+| Variable      | Description                                           |
+| ------------- | ----------------------------------------------------- |
+| `DB_HOST`     | PostgreSQL database host                              |
+| `DB_USER`     | PostgreSQL database user                              |
+| `DB_PASSWORD` | PostgreSQL database password                          |
+| `DB_NAME`     | PostgreSQL database name                              |
+| `REDIS_URL`   | Redis connection URL (e.g., `redis://localhost:6379`) |
+| `JWT_SECRET`  | JWT signing secret (minimum 32 characters)            |
+
+### Optional with Defaults
+
+| Variable                     | Default                   | Description                     |
+| ---------------------------- | ------------------------- | ------------------------------- |
+| `DB_PORT`                    | 5432                      | PostgreSQL port                 |
+| `PORT`                       | 3001                      | Server HTTP port                |
+| `NODE_ENV`                   | development               | Environment mode                |
+| `STORAGE_PATH`               | /var/www/.../flyer-images | File upload directory           |
+| `SMTP_PORT`                  | 587                       | SMTP server port                |
+| `SMTP_SECURE`                | false                     | Use TLS for SMTP                |
+| `GEMINI_RPM`                 | 5                         | Gemini API requests per minute  |
+| `AI_PRICE_QUALITY_THRESHOLD` | 0.5                       | AI extraction quality threshold |
+| `WORKER_CONCURRENCY`         | 1                         | Flyer processing concurrency    |
+| `WORKER_LOCK_DURATION`       | 30000                     | Worker lock duration (ms)       |
+
+### Optional (Feature-specific)
+
+| Variable              | Description                                 |
+| --------------------- | ------------------------------------------- |
+| `GEMINI_API_KEY`      | Google Gemini API key (enables AI features) |
+| `GOOGLE_MAPS_API_KEY` | Google Maps API key (enables geocoding)     |
+| `SMTP_HOST`           | SMTP server (enables email notifications)   |
+| `SMTP_USER`           | SMTP authentication username                |
+| `SMTP_PASS`           | SMTP authentication password                |
+| `SMTP_FROM_EMAIL`     | Sender email address                        |
+| `FRONTEND_URL`        | Frontend URL for email links                |
+| `JWT_SECRET_PREVIOUS` | Previous JWT secret for rotation (ADR-029)  |
+
+## Key Files
+
+- `src/config/env.ts` - Configuration schema and validation
+- `.env.example` - Template for required environment variables
+
+## Migration Guide
+
+To migrate existing `process.env` usage:
+
+1. Import the config:
+
+   ```typescript
+   import { config, isProduction } from '../config/env';
+   ```
+
+2. Replace direct access:
+
+   ```typescript
+   // Before
+   process.env.DB_HOST;
+   process.env.NODE_ENV === 'production';
+   parseInt(process.env.PORT || '3001', 10);
+
+   // After
+   config.database.host;
+   isProduction;
+   config.server.port;
+   ```
+
+3. Use service helpers for optional features:
+
+   ```typescript
+   import { isSmtpConfigured, isAiConfigured } from '../config/env';
+
+   if (isSmtpConfigured) {
+     // Email is available
+   }
+   ```

docs/adr/0009-caching-strategy-for-read-heavy-operations.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
 
 ## Context
 
@@ -20,3 +20,107 @@ We will implement a multi-layered caching strategy using an in-memory data store
 
 **Positive**: Directly addresses application performance and scalability. Reduces database load and improves API response times for common requests.
 **Negative**: Introduces Redis as a dependency if not already used. Adds complexity to the data-fetching logic and requires careful management of cache invalidation to prevent stale data.
+
+## Implementation Details
+
+### Cache Service
+
+A centralized cache service (`src/services/cacheService.server.ts`) provides reusable caching functionality:
+
+- **`getOrSet<T>(key, fetcher, options)`**: Cache-aside pattern implementation
+- **`get<T>(key)`**: Retrieve cached value
+- **`set<T>(key, value, ttl)`**: Store value with TTL
+- **`del(key)`**: Delete specific key
+- **`invalidatePattern(pattern)`**: Delete keys matching a pattern
+
+All cache operations are fail-safe - cache failures do not break the application.
+
+### TTL Configuration
+
+Different data types use different TTL values based on volatility:
+
+| Data Type           | TTL       | Rationale                              |
+| ------------------- | --------- | -------------------------------------- |
+| Brands/Stores       | 1 hour    | Rarely changes, safe to cache longer   |
+| Flyer lists         | 5 minutes | Changes when new flyers are added      |
+| Individual flyers   | 10 minutes| Stable once created                    |
+| Flyer items         | 10 minutes| Stable once created                    |
+| Statistics          | 5 minutes | Can be slightly stale                  |
+| Frequent sales      | 15 minutes| Aggregated data, updated periodically  |
+| Categories          | 1 hour    | Rarely changes                         |
+
+### Cache Key Strategy
+
+Cache keys follow a consistent prefix pattern for pattern-based invalidation:
+
+- `cache:brands` - All brands list
+- `cache:flyers:{limit}:{offset}` - Paginated flyer lists
+- `cache:flyer:{id}` - Individual flyer data
+- `cache:flyer-items:{flyerId}` - Items for a specific flyer
+- `cache:stats:*` - Statistics data
+- `geocode:{address}` - Geocoding results (30-day TTL)
+
+### Cached Endpoints
+
+The following repository methods implement server-side caching:
+
+| Method | Cache Key Pattern | TTL |
+| ------ | ----------------- | --- |
+| `FlyerRepository.getAllBrands()` | `cache:brands` | 1 hour |
+| `FlyerRepository.getFlyers()` | `cache:flyers:{limit}:{offset}` | 5 minutes |
+| `FlyerRepository.getFlyerItems()` | `cache:flyer-items:{flyerId}` | 10 minutes |
+
+### Cache Invalidation
+
+**Event-based invalidation** is triggered on write operations:
+
+- **Flyer creation** (`FlyerPersistenceService.saveFlyer`): Invalidates all `cache:flyers*` keys
+- **Flyer deletion** (`FlyerRepository.deleteFlyer`): Invalidates specific flyer and flyer items cache, plus flyer lists
+
+**Manual invalidation** via admin endpoints:
+
+- `POST /api/admin/system/clear-cache` - Clears all application cache (flyers, brands, stats)
+- `POST /api/admin/system/clear-geocode-cache` - Clears geocoding cache
+
+### Client-Side Caching
+
+TanStack React Query provides client-side caching with configurable stale times:
+
+| Query Type        | Stale Time  |
+| ----------------- | ----------- |
+| Categories        | 1 hour      |
+| Master Items      | 10 minutes  |
+| Flyer Items       | 5 minutes   |
+| Flyers            | 2 minutes   |
+| Shopping Lists    | 1 minute    |
+| Activity Log      | 30 seconds  |
+
+### Multi-Layer Cache Architecture
+
+```text
+Client Request
+      ↓
+[TanStack React Query] ← Client-side cache (staleTime-based)
+      ↓
+[Express API]
+      ↓
+[CacheService.getOrSet()] ← Server-side Redis cache (TTL-based)
+      ↓
+[PostgreSQL Database]
+```
+
+## Key Files
+
+- `src/services/cacheService.server.ts` - Centralized cache service
+- `src/services/db/flyer.db.ts` - Repository with caching for brands, flyers, flyer items
+- `src/services/flyerPersistenceService.server.ts` - Cache invalidation on flyer creation
+- `src/routes/admin.routes.ts` - Admin cache management endpoints
+- `src/config/queryClient.ts` - Client-side query cache configuration
+
+## Future Enhancements
+
+1. **Recipe caching**: Add caching to expensive recipe queries (by-sale-percentage, etc.)
+2. **Cache warming**: Pre-populate cache on startup for frequently accessed static data
+3. **Cache metrics**: Add hit/miss rate monitoring for observability
+4. **Conditional caching**: Skip cache for authenticated user-specific data
+5. **Cache compression**: Compress large cached payloads to reduce Redis memory usage

docs/adr/0010-testing-strategy-and-standards.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
 
 ## Context
 
@@ -14,9 +14,305 @@ We will formalize the testing pyramid for the project, defining the role of each
 
 1. **Unit Tests (Vitest)**: For isolated functions, components, and repository methods with mocked dependencies. High coverage is expected.
 2. **Integration Tests (Supertest)**: For API routes, testing the interaction between controllers, services, and mocked database layers. Focus on contract and middleware correctness.
-3. **End-to-End (E2E) Tests (Playwright/Cypress)**: For critical user flows (e.g., login, flyer upload, checkout), running against a real browser and a test database to ensure the entire system works together.
+3. **End-to-End (E2E) Tests (Vitest + Supertest)**: For critical user flows (e.g., login, flyer upload, checkout), running against a real test server and database to ensure the entire system works together.
 
 ## Consequences
 
 **Positive**: Ensures a consistent and comprehensive approach to quality assurance. Gives developers confidence when refactoring or adding new features. Clearly defines "done" for a new feature.
 **Negative**: May require investment in setting up and maintaining the E2E testing environment. Can slightly increase the time required to develop a feature if all test layers are required.
+
+## Implementation Details
+
+### Testing Framework Stack
+
+| Tool | Version | Purpose |
+| ---- | ------- | ------- |
+| Vitest | 4.0.15 | Test runner for all test types |
+| @testing-library/react | 16.3.0 | React component testing |
+| @testing-library/jest-dom | 6.9.1 | DOM assertion matchers |
+| supertest | 7.1.4 | HTTP assertion library for API testing |
+| msw | 2.12.3 | Mock Service Worker for network mocking |
+| testcontainers | 11.8.1 | Database containerization (optional) |
+| c8 + nyc | 10.1.3 / 17.1.0 | Coverage reporting |
+
+### Test File Organization
+
+```text
+src/
+├── components/
+│   └── *.test.tsx        # Component unit tests (colocated)
+├── hooks/
+│   └── *.test.ts         # Hook unit tests (colocated)
+├── services/
+│   └── *.test.ts         # Service unit tests (colocated)
+├── routes/
+│   └── *.test.ts         # Route handler unit tests (colocated)
+├── utils/
+│   └── *.test.ts         # Utility function tests (colocated)
+└── tests/
+    ├── setup/            # Test configuration and setup files
+    ├── utils/            # Test utilities, factories, helpers
+    ├── assets/           # Test fixtures (images, files)
+    ├── integration/      # Integration test files (*.test.ts)
+    └── e2e/              # End-to-end test files (*.e2e.test.ts)
+```
+
+**Naming Convention**: `{filename}.test.ts` or `{filename}.test.tsx` for unit/integration, `{filename}.e2e.test.ts` for E2E.
+
+### Configuration Files
+
+| Config | Environment | Purpose |
+| ------ | ----------- | ------- |
+| `vite.config.ts` | jsdom | Unit tests (React components, hooks) |
+| `vitest.config.integration.ts` | node | Integration tests (API routes) |
+| `vitest.config.e2e.ts` | node | E2E tests (full user flows) |
+| `vitest.workspace.ts` | - | Orchestrates all test projects |
+
+### Test Pyramid
+
+```text
+                    ┌─────────────┐
+                    │    E2E      │  5 test files
+                    │   Tests     │  Critical user flows
+                    ├─────────────┤
+                    │ Integration │  17 test files
+                    │   Tests     │  API contracts + middleware
+                ┌───┴─────────────┴───┐
+                │     Unit Tests      │  185 test files
+                │  Components, Hooks, │  Isolated functions
+                │  Services, Utils    │  Mocked dependencies
+                └─────────────────────┘
+```
+
+### Unit Tests
+
+**Purpose**: Test isolated functions, components, and modules with mocked dependencies.
+
+**Environment**: jsdom (browser-like)
+
+**Key Patterns**:
+
+```typescript
+// Component testing with providers
+import { renderWithProviders, screen } from '@/tests/utils/renderWithProviders';
+
+describe('MyComponent', () => {
+  it('renders correctly', () => {
+    renderWithProviders(<MyComponent />);
+    expect(screen.getByText('Hello')).toBeInTheDocument();
+  });
+});
+```
+
+```typescript
+// Hook testing
+import { renderHook, waitFor } from '@testing-library/react';
+import { useMyHook } from './useMyHook';
+
+describe('useMyHook', () => {
+  it('returns expected value', async () => {
+    const { result } = renderHook(() => useMyHook());
+    await waitFor(() => expect(result.current.data).toBeDefined());
+  });
+});
+```
+
+**Global Mocks** (automatically applied via `tests-setup-unit.ts`):
+
+- Database connections (`pg.Pool`)
+- AI services (`@google/genai`)
+- Authentication (`jsonwebtoken`, `bcrypt`)
+- Logging (`logger.server`, `logger.client`)
+- Notifications (`notificationService`)
+
+### Integration Tests
+
+**Purpose**: Test API routes with real service interactions and database.
+
+**Environment**: node
+
+**Setup**: Real Express server on port 3001, real PostgreSQL database
+
+```typescript
+// API route testing pattern
+import supertest from 'supertest';
+import { createAndLoginUser } from '@/tests/utils/testHelpers';
+
+describe('Auth API', () => {
+  let request: ReturnType<typeof supertest>;
+  let authToken: string;
+
+  beforeAll(async () => {
+    const app = (await import('../../../server')).default;
+    request = supertest(app);
+    const { token } = await createAndLoginUser(request);
+    authToken = token;
+  });
+
+  it('GET /api/auth/me returns user profile', async () => {
+    const response = await request
+      .get('/api/auth/me')
+      .set('Authorization', `Bearer ${authToken}`);
+
+    expect(response.status).toBe(200);
+    expect(response.body.user.email).toBeDefined();
+  });
+});
+```
+
+**Database Cleanup**:
+
+```typescript
+import { cleanupDb } from '@/tests/utils/cleanup';
+
+afterAll(async () => {
+  await cleanupDb({ users: [testUserId] });
+});
+```
+
+### E2E Tests
+
+**Purpose**: Test complete user journeys through the application.
+
+**Timeout**: 120 seconds (for long-running flows)
+
+**Current E2E Tests**:
+
+- `auth.e2e.test.ts` - Registration, login, password reset
+- `flyer-upload.e2e.test.ts` - Complete flyer upload pipeline
+- `user-journey.e2e.test.ts` - Full user workflow
+- `admin-authorization.e2e.test.ts` - Admin-specific flows
+- `admin-dashboard.e2e.test.ts` - Admin dashboard functionality
+
+### Mock Factories
+
+The project uses comprehensive mock factories (`src/tests/utils/mockFactories.ts`, 1553 lines) for creating test data:
+
+```typescript
+import {
+  createMockUser,
+  createMockFlyer,
+  createMockFlyerItem,
+  createMockRecipe,
+  resetMockIds,
+} from '@/tests/utils/mockFactories';
+
+beforeEach(() => {
+  resetMockIds(); // Ensure deterministic IDs
+});
+
+it('creates flyer with items', () => {
+  const flyer = createMockFlyer({ store_name: 'TestMart' });
+  const items = [createMockFlyerItem({ flyer_id: flyer.flyer_id })];
+  // ...
+});
+```
+
+**Factory Coverage**: 90+ factory functions for all domain entities including users, flyers, recipes, shopping lists, budgets, achievements, etc.
+
+### Test Utilities
+
+| Utility | Purpose |
+| ------- | ------- |
+| `renderWithProviders()` | Wrap components with AppProviders + Router |
+| `createAndLoginUser()` | Create user and return auth token |
+| `cleanupDb()` | Database cleanup respecting FK constraints |
+| `createTestApp()` | Create Express app for route testing |
+| `poll()` | Polling utility for async operations |
+
+### Coverage Configuration
+
+**Coverage Provider**: v8 (built-in Vitest)
+
+**Report Directories**:
+
+- `.coverage/unit/` - Unit test coverage
+- `.coverage/integration/` - Integration test coverage
+- `.coverage/e2e/` - E2E test coverage
+
+**Excluded from Coverage**:
+
+- `src/index.tsx`, `src/main.tsx` (entry points)
+- `src/tests/**` (test files themselves)
+- `src/**/*.d.ts` (type declarations)
+- `src/components/icons/**` (icon components)
+- `src/db/seed*.ts` (database seeding scripts)
+
+### npm Scripts
+
+```bash
+# Run all tests
+npm run test
+
+# Run by level
+npm run test:unit          # Unit tests only (jsdom)
+npm run test:integration   # Integration tests only (node)
+
+# With coverage
+npm run test:coverage      # Unit + Integration with reports
+
+# Clean coverage directories
+npm run clean
+```
+
+### Test Timeouts
+
+| Test Type | Timeout | Rationale |
+| --------- | ------- | --------- |
+| Unit | 5 seconds | Fast, isolated tests |
+| Integration | 60 seconds | AI service calls, DB operations |
+| E2E | 120 seconds | Full user flow with multiple API calls |
+
+## Best Practices
+
+### When to Write Each Test Type
+
+1. **Unit Tests** (required):
+   - Pure functions and utilities
+   - React components (rendering, user interactions)
+   - Custom hooks
+   - Service methods with mocked dependencies
+   - Repository methods
+
+2. **Integration Tests** (required for API changes):
+   - New API endpoints
+   - Authentication/authorization flows
+   - Middleware behavior
+   - Database query correctness
+
+3. **E2E Tests** (for critical paths):
+   - User registration and login
+   - Core business flows (flyer upload, shopping lists)
+   - Admin operations
+
+### Test Isolation Guidelines
+
+1. **Reset mock IDs**: Call `resetMockIds()` in `beforeEach()`
+2. **Unique test data**: Use timestamps or UUIDs for emails/usernames
+3. **Clean up after tests**: Use `cleanupDb()` in `afterAll()`
+4. **Don't share state**: Each test should be independent
+
+### Mocking Guidelines
+
+1. **Unit tests**: Mock external dependencies (DB, APIs, services)
+2. **Integration tests**: Mock only external APIs (AI services)
+3. **E2E tests**: Minimal mocking, use real services where possible
+
+## Key Files
+
+- `vite.config.ts` - Unit test configuration
+- `vitest.config.integration.ts` - Integration test configuration
+- `vitest.config.e2e.ts` - E2E test configuration
+- `vitest.workspace.ts` - Workspace orchestration
+- `src/tests/setup/tests-setup-unit.ts` - Global mocks (488 lines)
+- `src/tests/setup/integration-global-setup.ts` - Server + DB setup
+- `src/tests/utils/mockFactories.ts` - Mock factories (1553 lines)
+- `src/tests/utils/testHelpers.ts` - Test utilities
+
+## Future Enhancements
+
+1. **Browser E2E Tests**: Consider adding Playwright for actual browser testing
+2. **Visual Regression**: Screenshot comparison for UI components
+3. **Performance Testing**: Add benchmarks for critical paths
+4. **Mutation Testing**: Verify test quality with mutation testing tools
+5. **Coverage Thresholds**: Define minimum coverage requirements per module

docs/adr/0012-frontend-component-library-and-design-system.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Partially Implemented
 
 ## Context
 
@@ -16,3 +16,255 @@ We will establish a formal Design System and Component Library. This will involv
 
 - **Positive**: Ensures a consistent and high-quality user interface. Accelerates frontend development by providing reusable, well-documented components. Improves maintainability and reduces technical debt.
 - **Negative**: Requires an initial investment in setting up Storybook and migrating existing components. Adds a new dependency and a new workflow for frontend development.
+
+## Implementation Status
+
+### What's Implemented
+
+The codebase has a solid foundation for a design system:
+
+- ✅ **Tailwind CSS v4.1.17** as the styling solution
+- ✅ **Dark mode** fully implemented with system preference detection
+- ✅ **55 custom icon components** for consistent iconography
+- ✅ **Component organization** with shared vs. feature-specific separation
+- ✅ **Accessibility patterns** with ARIA attributes and focus management
+
+### What's Not Yet Implemented
+
+- ❌ **Storybook** is not yet installed or configured
+- ❌ **Formal design token documentation** (colors, typography, spacing)
+- ❌ **Visual regression testing** for component changes
+
+## Implementation Details
+
+### Component Library Structure
+
+```text
+src/
+├── components/              # 30+ shared UI components
+│   ├── icons/              # 55 SVG icon components
+│   ├── Header.tsx
+│   ├── Footer.tsx
+│   ├── LoadingSpinner.tsx
+│   ├── ErrorDisplay.tsx
+│   ├── ConfirmationModal.tsx
+│   ├── DarkModeToggle.tsx
+│   ├── StatCard.tsx
+│   ├── PasswordInput.tsx
+│   └── ...
+├── features/               # Feature-specific components
+│   ├── charts/            # PriceChart, PriceHistoryChart
+│   ├── flyer/             # FlyerDisplay, FlyerList, FlyerUploader
+│   ├── shopping/          # ShoppingListComponent, WatchedItemsList
+│   └── voice-assistant/   # VoiceAssistant
+├── layouts/               # Page layouts
+│   └── MainLayout.tsx
+├── pages/                 # Page components
+│   └── admin/components/  # Admin-specific components
+└── providers/             # Context providers
+```
+
+### Styling Approach
+
+**Tailwind CSS** with utility-first classes:
+
+```typescript
+// Component example with consistent styling patterns
+<button className="px-4 py-2 bg-brand-primary text-white rounded-lg
+                   hover:bg-brand-dark transition-colors duration-200
+                   focus:outline-none focus:ring-2 focus:ring-brand-primary
+                   focus:ring-offset-2 dark:focus:ring-offset-gray-800">
+  Click me
+</button>
+```
+
+**Common Utility Patterns**:
+
+| Pattern | Classes |
+| ------- | ------- |
+| Card container | `bg-white dark:bg-gray-800 rounded-lg shadow-md p-6` |
+| Primary button | `bg-brand-primary hover:bg-brand-dark text-white rounded-lg px-4 py-2` |
+| Secondary button | `bg-gray-100 dark:bg-gray-700 text-gray-700 dark:text-gray-200` |
+| Input field | `border border-gray-300 dark:border-gray-600 rounded-md px-3 py-2` |
+| Focus ring | `focus:outline-none focus:ring-2 focus:ring-brand-primary` |
+
+### Color System
+
+**Brand Colors** (Tailwind theme extensions):
+
+- `brand-primary` - Primary brand color (blue/teal)
+- `brand-light` - Lighter variant
+- `brand-dark` - Darker variant for hover states
+- `brand-secondary` - Secondary accent color
+
+**Semantic Colors**:
+
+- Gray scale: `gray-50` through `gray-950`
+- Error: `red-500`, `red-600`
+- Success: `green-500`, `green-600`
+- Warning: `yellow-500`, `orange-500`
+- Info: `blue-500`, `blue-600`
+
+### Dark Mode Implementation
+
+Dark mode is fully implemented using Tailwind's `dark:` variant:
+
+```typescript
+// Initialization in useAppInitialization hook
+const initializeDarkMode = () => {
+  // Priority: user profile > localStorage > system preference
+  const stored = localStorage.getItem('darkMode');
+  const systemPreference = window.matchMedia('(prefers-color-scheme: dark)').matches;
+  const isDarkMode = stored ? stored === 'true' : systemPreference;
+
+  document.documentElement.classList.toggle('dark', isDarkMode);
+  return isDarkMode;
+};
+```
+
+**Usage in components**:
+
+```typescript
+<div className="bg-white dark:bg-gray-800 text-gray-900 dark:text-white">
+  Content adapts to theme
+</div>
+```
+
+### Icon System
+
+**55 custom SVG icon components** in `src/components/icons/`:
+
+```typescript
+// Icon component pattern
+interface IconProps extends React.SVGProps<SVGSVGElement> {
+  title?: string;
+}
+
+export const CheckCircleIcon: React.FC<IconProps> = ({ title, ...props }) => (
+  <svg {...props} fill="currentColor" viewBox="0 0 24 24">
+    {title && <title>{title}</title>}
+    <path d="..." />
+  </svg>
+);
+```
+
+**Usage**:
+
+```typescript
+<CheckCircleIcon className="w-5 h-5 text-green-500" title="Success" />
+```
+
+**External icons**: Lucide React (`lucide-react` v0.555.0) used for additional icons.
+
+### Accessibility Patterns
+
+**ARIA Attributes**:
+
+```typescript
+// Modal pattern
+<div role="dialog" aria-modal="true" aria-labelledby="modal-title">
+  <h2 id="modal-title">Modal Title</h2>
+</div>
+
+// Button with label
+<button aria-label="Close modal">
+  <XMarkIcon aria-hidden="true" />
+</button>
+
+// Loading state
+<div role="status" aria-live="polite">
+  <LoadingSpinner />
+</div>
+```
+
+**Focus Management**:
+
+- Consistent focus rings: `focus:ring-2 focus:ring-brand-primary focus:ring-offset-2`
+- Dark mode offset: `dark:focus:ring-offset-gray-800`
+- No outline: `focus:outline-none` (using ring instead)
+
+### State Management
+
+**Context Providers** (see ADR-005):
+
+| Provider | Purpose |
+| -------- | ------- |
+| `AuthProvider` | Authentication state |
+| `ModalProvider` | Modal open/close state |
+| `FlyersProvider` | Flyer data |
+| `MasterItemsProvider` | Grocery items |
+| `UserDataProvider` | User-specific data |
+
+**Provider Hierarchy** in `AppProviders.tsx`:
+
+```typescript
+<QueryClientProvider>
+  <ModalProvider>
+    <AuthProvider>
+      <FlyersProvider>
+        <MasterItemsProvider>
+          <UserDataProvider>
+            {children}
+          </UserDataProvider>
+        </MasterItemsProvider>
+      </FlyersProvider>
+    </AuthProvider>
+  </ModalProvider>
+</QueryClientProvider>
+```
+
+## Key Files
+
+- `tailwind.config.js` - Tailwind CSS configuration
+- `src/index.css` - Tailwind CSS entry point
+- `src/components/` - Shared UI components
+- `src/components/icons/` - Icon component library (55 icons)
+- `src/providers/AppProviders.tsx` - Context provider composition
+- `src/hooks/useAppInitialization.ts` - Dark mode initialization
+
+## Component Guidelines
+
+### When to Create Shared Components
+
+Create a shared component in `src/components/` when:
+
+1. Used in 3+ places across the application
+2. Represents a reusable UI pattern (buttons, cards, modals)
+3. Has consistent styling/behavior requirements
+
+### Naming Conventions
+
+- **Components**: PascalCase (`LoadingSpinner.tsx`)
+- **Icons**: PascalCase with `Icon` suffix (`CheckCircleIcon.tsx`)
+- **Hooks**: camelCase with `use` prefix (`useModal.ts`)
+- **Contexts**: PascalCase with `Context` suffix (`AuthContext.tsx`)
+
+### Styling Guidelines
+
+1. Use Tailwind utility classes exclusively
+2. Include dark mode variants for all colors: `bg-white dark:bg-gray-800`
+3. Add focus states for interactive elements
+4. Use semantic color names from the design system
+
+## Future Enhancements (Storybook Setup)
+
+To complete ADR-012 implementation:
+
+1. **Install Storybook**:
+
+   ```bash
+   npx storybook@latest init
+   ```
+
+2. **Create stories for core components**:
+   - Button variants
+   - Form inputs (PasswordInput, etc.)
+   - Modal components
+   - Loading states
+   - Icon showcase
+
+3. **Add visual regression testing** with Chromatic or Percy
+
+4. **Document design tokens** formally in Storybook
+
+5. **Create component composition guidelines**

docs/adr/0014-containerization-and-deployment-strategy.md

@@ -2,17 +2,288 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Implemented
+
+**Implemented**: 2026-01-09
 
 ## Context
 
-The project is currently run using `pm2`, and the `README.md` contains manual setup instructions. While functional, this lacks the portability, scalability, and consistency of modern deployment practices.
+The project is currently run using `pm2`, and the `README.md` contains manual setup instructions. While functional, this lacks the portability, scalability, and consistency of modern deployment practices. Local development environments also suffered from inconsistency issues.
 
 ## Decision
 
-We will standardize the deployment process by containerizing the application using **Docker**. This will involve defining a `Dockerfile` for building a production-ready image and a `docker-compose.yml` file for orchestrating the application, database, and other services (like Redis) in a development environment.
+We will standardize the deployment process using a hybrid approach:
+
+1. **PM2 for Production**: Use PM2 cluster mode for process management, load balancing, and zero-downtime reloads.
+2. **Docker/Podman for Development**: Provide a complete containerized development environment with automatic initialization.
+3. **VS Code Dev Containers**: Enable one-click development environment setup.
+4. **Gitea Actions for CI/CD**: Automated deployment pipelines handle builds and deployments.
 
 ## Consequences
 
-- **Positive**: Ensures consistency between development and production environments. Simplifies the setup for new developers. Improves portability and scalability of the application.
-- **Negative**: Requires learning Docker and containerization concepts. Adds `Dockerfile` and `docker-compose.yml` to the project's configuration.
+- **Positive**: Ensures consistency between development and production environments. Simplifies the setup for new developers to a single "Reopen in Container" action. Improves portability and scalability of the application.
+- **Negative**: Requires Docker/Podman installation. Container builds take time on first setup.
+
+## Implementation Details
+
+### Quick Start (Development)
+
+```bash
+# Prerequisites:
+# - Docker Desktop or Podman installed
+# - VS Code with "Dev Containers" extension
+
+# Option 1: VS Code Dev Containers (Recommended)
+# 1. Open project in VS Code
+# 2. Click "Reopen in Container" when prompted
+# 3. Wait for initialization to complete
+# 4. Development server starts automatically
+
+# Option 2: Manual Docker Compose
+podman-compose -f compose.dev.yml up -d
+podman exec -it flyer-crawler-dev bash
+./scripts/docker-init.sh
+npm run dev:container
+```
+
+### Container Services Architecture
+
+```text
+┌─────────────────────────────────────────────────────────────┐
+│                    Development Environment                   │
+├─────────────────────────────────────────────────────────────┤
+│                                                             │
+│  ┌─────────────┐    ┌─────────────┐    ┌─────────────┐     │
+│  │     app     │    │   postgres  │    │    redis    │     │
+│  │  (Node.js)  │───▶│  (PostGIS)  │    │   (Cache)   │     │
+│  │             │───▶│             │    │             │     │
+│  └─────────────┘    └─────────────┘    └─────────────┘     │
+│     :3000/:3001         :5432              :6379           │
+│                                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### compose.dev.yml Services
+
+| Service    | Image                   | Purpose                | Healthcheck      |
+| ---------- | ----------------------- | ---------------------- | ---------------- |
+| `app`      | Custom (Dockerfile.dev) | Node.js application    | HTTP /api/health |
+| `postgres` | postgis/postgis:15-3.4  | Database with PostGIS  | pg_isready       |
+| `redis`    | redis:alpine            | Caching and job queues | redis-cli ping   |
+
+### Automatic Initialization
+
+The container initialization script (`scripts/docker-init.sh`) performs:
+
+1. **npm install** - Installs dependencies into isolated volume
+2. **Wait for PostgreSQL** - Polls until database is ready
+3. **Wait for Redis** - Polls until Redis is responding
+4. **Schema Check** - Detects if database needs initialization
+5. **Database Setup** - Runs `npm run db:reset:dev` if needed (schema + seed data)
+
+### Development Dockerfile
+
+Located in `Dockerfile.dev`:
+
+```dockerfile
+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install Node.js 20.x LTS + database clients
+RUN apt-get update && apt-get install -y \
+    curl git build-essential python3 \
+    postgresql-client redis-tools \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
+    && apt-get install -y nodejs
+
+WORKDIR /app
+
+ENV NODE_ENV=development
+ENV NODE_OPTIONS='--max-old-space-size=8192'
+
+CMD ["bash"]
+```
+
+### Environment Configuration
+
+Copy `.env.example` to `.env` for local overrides (optional for containers):
+
+```bash
+# Container defaults (set in compose.dev.yml)
+DB_HOST=postgres          # Use Docker service name, not IP
+DB_PORT=5432
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_NAME=flyer_crawler_dev
+REDIS_URL=redis://redis:6379
+```
+
+### VS Code Dev Container Configuration
+
+Located in `.devcontainer/devcontainer.json`:
+
+| Lifecycle Hook      | Timing            | Action                         |
+| ------------------- | ----------------- | ------------------------------ |
+| `initializeCommand` | Before container  | Start Podman machine (Windows) |
+| `postCreateCommand` | Container created | Run `docker-init.sh`           |
+| `postAttachCommand` | VS Code attached  | Start dev server               |
+
+### Default Test Accounts
+
+After initialization, these accounts are available:
+
+| Role  | Email               | Password  |
+| ----- | ------------------- | --------- |
+| Admin | `admin@example.com` | adminpass |
+| User  | `user@example.com`  | userpass  |
+
+---
+
+## Production Deployment (PM2)
+
+### PM2 Ecosystem Configuration
+
+Located in `ecosystem.config.cjs`:
+
+```javascript
+module.exports = {
+  apps: [
+    {
+      // API Server - Cluster mode for load balancing
+      name: 'flyer-crawler-api',
+      script: './node_modules/.bin/tsx',
+      args: 'server.ts',
+      max_memory_restart: '500M',
+      instances: 'max', // Use all CPU cores
+      exec_mode: 'cluster', // Enable cluster mode
+      kill_timeout: 5000, // Graceful shutdown timeout
+
+      // Restart configuration
+      max_restarts: 40,
+      exp_backoff_restart_delay: 100,
+      min_uptime: '10s',
+
+      env_production: {
+        NODE_ENV: 'production',
+        cwd: '/var/www/flyer-crawler.projectium.com',
+      },
+      env_test: {
+        NODE_ENV: 'test',
+        cwd: '/var/www/flyer-crawler-test.projectium.com',
+      },
+    },
+    {
+      // Background Worker - Single instance
+      name: 'flyer-crawler-worker',
+      script: './node_modules/.bin/tsx',
+      args: 'src/services/worker.ts',
+      max_memory_restart: '1G',
+      kill_timeout: 10000, // Workers need more time for jobs
+      // ... similar config
+    },
+  ],
+};
+```
+
+### Deployment Directory Structure
+
+```text
+/var/www/
+├── flyer-crawler.projectium.com/          # Production
+│   ├── server.ts
+│   ├── ecosystem.config.cjs
+│   ├── package.json
+│   ├── flyer-images/
+│   │   ├── icons/
+│   │   └── archive/
+│   └── ...
+└── flyer-crawler-test.projectium.com/     # Test environment
+    └── ... (same structure)
+```
+
+### Environment-Specific Configuration
+
+| Environment | Port | Redis DB | PM2 Process Suffix |
+| ----------- | ---- | -------- | ------------------ |
+| Production  | 3000 | 0        | (none)             |
+| Test        | 3001 | 1        | `-test`            |
+| Development | 3000 | 0        | `-dev`             |
+
+### PM2 Commands Reference
+
+```bash
+# Start/reload with environment
+pm2 startOrReload ecosystem.config.cjs --env production --update-env
+
+# Save process list for startup
+pm2 save
+
+# View logs
+pm2 logs flyer-crawler-api --lines 50
+
+# Monitor processes
+pm2 monit
+
+# List all processes
+pm2 list
+
+# Describe process details
+pm2 describe flyer-crawler-api
+```
+
+### Resource Limits
+
+| Process          | Memory Limit | Restart Delay            | Kill Timeout |
+| ---------------- | ------------ | ------------------------ | ------------ |
+| API Server       | 500MB        | Exponential (100ms base) | 5s           |
+| Worker           | 1GB          | Exponential (100ms base) | 10s          |
+| Analytics Worker | 1GB          | Exponential (100ms base) | 10s          |
+
+---
+
+## Troubleshooting
+
+### Container Issues
+
+```bash
+# Reset everything and start fresh
+podman-compose -f compose.dev.yml down -v
+podman-compose -f compose.dev.yml up -d --build
+
+# View container logs
+podman-compose -f compose.dev.yml logs -f app
+
+# Connect to database manually
+podman exec -it flyer-crawler-postgres psql -U postgres -d flyer_crawler_dev
+
+# Rebuild just the app container
+podman-compose -f compose.dev.yml build app
+```
+
+### Common Issues
+
+| Issue                    | Solution                                                        |
+| ------------------------ | --------------------------------------------------------------- |
+| "Database not ready"     | Wait for postgres healthcheck, or run `docker-init.sh` manually |
+| "node_modules not found" | Run `npm install` inside container                              |
+| "Permission denied"      | Ensure scripts have execute permission: `chmod +x scripts/*.sh` |
+| "Network unreachable"    | Use service names (postgres, redis) not IPs                     |
+
+## Key Files
+
+- `compose.dev.yml` - Docker Compose configuration
+- `Dockerfile.dev` - Development container definition
+- `.devcontainer/devcontainer.json` - VS Code Dev Container config
+- `scripts/docker-init.sh` - Container initialization script
+- `.env.example` - Environment variable template
+- `ecosystem.config.cjs` - PM2 production configuration
+- `.gitea/workflows/deploy-to-prod.yml` - Production deployment pipeline
+- `.gitea/workflows/deploy-to-test.yml` - Test deployment pipeline
+
+## Related ADRs
+
+- [ADR-017](./0017-ci-cd-and-branching-strategy.md) - CI/CD Strategy
+- [ADR-038](./0038-graceful-shutdown-pattern.md) - Graceful Shutdown Pattern

docs/adr/0016-api-security-hardening.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
 
 ## Context
 
@@ -20,3 +20,197 @@ We will implement a multi-layered security approach for the API:
 
 - **Positive**: Significantly improves the application's security posture against common web vulnerabilities like XSS, clickjacking, and brute-force attacks.
 - **Negative**: Requires careful configuration of CORS and rate limits to avoid blocking legitimate traffic. Content-Security-Policy can be complex to configure correctly.
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ **Helmet** - Security headers middleware with CSP, HSTS, and more
+- ✅ **Rate Limiting** - Comprehensive implementation with 17+ specific limiters
+- ✅ **Input Validation** - Zod-based request validation on all routes
+- ✅ **File Upload Security** - MIME type validation, size limits, filename sanitization
+- ✅ **Error Handling** - Production-safe error responses (no sensitive data leakage)
+- ✅ **Request Timeout** - 5-minute timeout protection
+- ✅ **Secure Cookies** - httpOnly and secure flags for authentication cookies
+
+### Not Required
+
+- ℹ️ **CORS** - Not needed (API and frontend are same-origin)
+
+## Implementation Details
+
+### Helmet Security Headers
+
+Using **helmet v8.x** configured in `server.ts` as the first middleware after app initialization.
+
+**Security Headers Applied**:
+
+| Header | Configuration | Purpose |
+| ------ | ------------- | ------- |
+| Content-Security-Policy | Custom directives | Prevents XSS, code injection |
+| Strict-Transport-Security | 1 year, includeSubDomains, preload | Forces HTTPS connections |
+| X-Content-Type-Options | nosniff | Prevents MIME type sniffing |
+| X-Frame-Options | DENY | Prevents clickjacking |
+| X-XSS-Protection | 0 (disabled) | Deprecated, CSP preferred |
+| Referrer-Policy | strict-origin-when-cross-origin | Controls referrer information |
+| Cross-Origin-Resource-Policy | cross-origin | Allows external resource loading |
+
+**Content Security Policy Directives**:
+
+```typescript
+contentSecurityPolicy: {
+  directives: {
+    defaultSrc: ["'self'"],
+    scriptSrc: ["'self'", "'unsafe-inline'"],   // React inline scripts
+    styleSrc: ["'self'", "'unsafe-inline'"],    // Tailwind inline styles
+    imgSrc: ["'self'", 'data:', 'blob:', 'https:'],  // External images
+    fontSrc: ["'self'", 'https:', 'data:'],
+    connectSrc: ["'self'", 'https:', 'wss:'],   // API + WebSocket
+    frameSrc: ["'none'"],                        // No iframes
+    objectSrc: ["'none'"],                       // No plugins
+    upgradeInsecureRequests: [],                 // Production only
+  },
+}
+```
+
+**HSTS Configuration**:
+
+- Max-age: 1 year (31536000 seconds)
+- Includes subdomains
+- Preload-ready for browser HSTS lists
+
+### Rate Limiting
+
+Using **express-rate-limit v8.2.1** with a centralized configuration in `src/config/rateLimiters.ts`.
+
+**Standard Configuration**:
+
+```typescript
+const standardConfig = {
+  standardHeaders: true,  // Sends RateLimit-* headers
+  legacyHeaders: false,
+  skip: shouldSkipRateLimit,  // Disabled in test environment
+};
+```
+
+**Rate Limiters by Category**:
+
+| Category | Limiter | Window | Max Requests |
+| -------- | ------- | ------ | ------------ |
+| **Authentication** | loginLimiter | 15 min | 5 |
+| | registerLimiter | 1 hour | 5 |
+| | forgotPasswordLimiter | 15 min | 5 |
+| | resetPasswordLimiter | 15 min | 10 |
+| | refreshTokenLimiter | 15 min | 20 |
+| | logoutLimiter | 15 min | 10 |
+| **Public/User Read** | publicReadLimiter | 15 min | 100 |
+| | userReadLimiter | 15 min | 100 |
+| | userUpdateLimiter | 15 min | 100 |
+| **Sensitive Operations** | userSensitiveUpdateLimiter | 1 hour | 5 |
+| | adminTriggerLimiter | 15 min | 30 |
+| **AI/Costly** | aiGenerationLimiter | 15 min | 20 |
+| | geocodeLimiter | 1 hour | 100 |
+| | priceHistoryLimiter | 15 min | 50 |
+| **Uploads** | adminUploadLimiter | 15 min | 20 |
+| | aiUploadLimiter | 15 min | 10 |
+| | batchLimiter | 15 min | 50 |
+| **Tracking** | trackingLimiter | 15 min | 200 |
+| | reactionToggleLimiter | 15 min | 150 |
+
+**Test Environment Handling**:
+
+Rate limiting is automatically disabled in test environment via `shouldSkipRateLimit` utility (`src/utils/rateLimit.ts`). Tests can opt-in to rate limiting by setting the `x-test-rate-limit-enable: true` header.
+
+### Input Validation
+
+**Zod Schema Validation** (`src/middleware/validation.middleware.ts`):
+
+- Type-safe parsing and coercion for params, query, and body
+- Applied to all API routes via `validateRequest()` middleware
+- Returns structured validation errors with field-level details
+
+**Filename Sanitization** (`src/utils/stringUtils.ts`):
+
+```typescript
+// Removes dangerous characters from uploaded filenames
+sanitizeFilename(filename: string): string
+```
+
+### File Upload Security
+
+**Multer Configuration** (`src/middleware/multer.middleware.ts`):
+
+- MIME type validation via `imageFileFilter` (only image/* allowed)
+- File size limits (2MB for logos, configurable per upload type)
+- Unique filenames using timestamps + random suffixes
+- User-scoped storage paths
+
+### Error Handling
+
+**Production-Safe Responses** (`src/middleware/errorHandler.ts`):
+
+- Production mode: Returns generic error message with tracking ID
+- Development mode: Returns detailed error information
+- Sensitive error details are logged but never exposed to clients
+
+### Request Security
+
+**Timeout Protection** (`server.ts`):
+
+- 5-minute request timeout via `connect-timeout` middleware
+- Prevents resource exhaustion from long-running requests
+
+**Secure Cookies**:
+
+```typescript
+// Cookie configuration for auth tokens
+{
+  httpOnly: true,
+  secure: process.env.NODE_ENV === 'production',
+  sameSite: 'strict',
+  maxAge: 7 * 24 * 60 * 60 * 1000  // 7 days for refresh token
+}
+```
+
+### Request Logging
+
+Per-request structured logging (ADR-004):
+
+- Request ID tracking
+- User ID and IP address logging
+- Failed request details (4xx+) logged with headers and body
+- Unhandled errors assigned unique error IDs
+
+## Key Files
+
+- `server.ts` - Helmet middleware configuration (security headers)
+- `src/config/rateLimiters.ts` - Rate limiter definitions (17+ limiters)
+- `src/utils/rateLimit.ts` - Rate limit skip logic for testing
+- `src/middleware/validation.middleware.ts` - Zod-based request validation
+- `src/middleware/errorHandler.ts` - Production-safe error handling
+- `src/middleware/multer.middleware.ts` - Secure file upload configuration
+- `src/utils/stringUtils.ts` - Filename sanitization
+
+## Future Enhancements
+
+1. **Configure CORS** (if needed for cross-origin access):
+
+   ```bash
+   npm install cors @types/cors
+   ```
+
+   Add to `server.ts`:
+
+   ```typescript
+   import cors from 'cors';
+   app.use(cors({
+     origin: process.env.ALLOWED_ORIGINS?.split(',') || 'http://localhost:3000',
+     credentials: true,
+   }));
+   ```
+
+2. **Redis-backed rate limiting**: For distributed deployments, use `rate-limit-redis` store
+
+3. **CSP Nonce**: Generate per-request nonces for stricter script-src policy
+
+4. **Report-Only CSP**: Add `Content-Security-Policy-Report-Only` header for testing policy changes

docs/adr/0017-ci-cd-and-branching-strategy.md

@@ -2,7 +2,9 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
 
 ## Context
 
@@ -10,9 +12,186 @@ The project has Gitea workflows but lacks a documented standard for how code mov
 
 ## Decision
 
-We will formalize the end-to-end CI/CD process. This ADR will define the project's **branching strategy** (e.g., GitFlow or Trunk-Based Development), establish mandatory checks in the pipeline (e.g., linting, unit tests, vulnerability scanning), and specify the process for building and publishing Docker images (`ADR-014`) to a registry.
+We will formalize the end-to-end CI/CD process using:
+
+1. **Trunk-Based Development**: All work is merged to `main` branch.
+2. **Automated Test Deployment**: Every push to `main` triggers deployment to test environment.
+3. **Manual Production Deployment**: Production deployments require explicit confirmation.
+4. **Semantic Versioning**: Automated version bumping on deployments.
 
 ## Consequences
 
 - **Positive**: Automates quality control and creates a safe, repeatable path to production. Increases development velocity and reduces deployment-related errors.
 - **Negative**: Initial setup effort for the CI/CD pipeline. May slightly increase the time to merge code due to mandatory checks.
+
+## Implementation Details
+
+### Branching Strategy
+
+**Trunk-Based Development**:
+
+```text
+main ─────●─────●─────●─────●─────●─────▶
+          │     │     │     │     │
+          │     │     │     │     └── Deploy to Prod (manual)
+          │     │     │     └── v0.9.70 (patch bump)
+          │     │     └── Deploy to Test (auto)
+          │     └── v0.9.69 (patch bump)
+          └── Feature complete
+```
+
+- All development happens on `main` branch
+- Feature branches are short-lived (< 1 day)
+- Every merge to `main` triggers test deployment
+- Production deploys are manual with confirmation
+
+### Pipeline Stages
+
+**Deploy to Test** (Automatic on push to `main`):
+
+```yaml
+jobs:
+  deploy-to-test:
+    steps:
+      - Checkout code
+      - Setup Node.js 20
+      - Install dependencies (npm ci)
+      - Bump patch version (npm version patch)
+      - TypeScript type-check
+      - Prettier check
+      - ESLint check
+      - Run unit tests with coverage
+      - Run integration tests with coverage
+      - Run E2E tests with coverage
+      - Merge coverage reports
+      - Check database schema hash
+      - Build React application
+      - Deploy to test server (rsync)
+      - Install production dependencies
+      - Reload PM2 processes
+      - Update schema hash in database
+```
+
+**Deploy to Production** (Manual trigger):
+
+```yaml
+on:
+  workflow_dispatch:
+    inputs:
+      confirmation:
+        description: 'Type "deploy-to-prod" to confirm'
+        required: true
+
+jobs:
+  deploy-production:
+    steps:
+      - Verify confirmation phrase
+      - Checkout main branch
+      - Install dependencies
+      - Bump minor version (npm version minor)
+      - Check production schema hash
+      - Build React application
+      - Deploy to production server
+      - Reload PM2 processes
+      - Update schema hash
+```
+
+### Version Bumping Strategy
+
+| Trigger                    | Version Change | Example         |
+| -------------------------- | -------------- | --------------- |
+| Push to main (test deploy) | Patch bump     | 0.9.69 → 0.9.70 |
+| Production deploy          | Minor bump     | 0.9.70 → 0.10.0 |
+| Major release              | Manual         | 0.10.0 → 1.0.0  |
+
+**Commit Message Format**:
+
+```text
+ci: Bump version to 0.9.70 [skip ci]
+```
+
+The `[skip ci]` tag prevents version bump commits from triggering another workflow.
+
+### Database Schema Management
+
+Schema changes are tracked via SHA-256 hash:
+
+```sql
+CREATE TABLE public.schema_info (
+  environment VARCHAR(50) PRIMARY KEY,
+  schema_hash VARCHAR(64) NOT NULL,
+  deployed_at TIMESTAMP DEFAULT NOW()
+);
+```
+
+**Deployment Checks**:
+
+1. Calculate hash of `sql/master_schema_rollup.sql`
+2. Compare with hash in target database
+3. If mismatch: **FAIL** deployment (manual migration required)
+4. If match: Continue deployment
+5. After deploy: Update hash in database
+
+### Quality Gates
+
+| Check                 | Required | Blocking               |
+| --------------------- | -------- | ---------------------- |
+| TypeScript type-check | ✅       | No (continue-on-error) |
+| Prettier formatting   | ✅       | No                     |
+| ESLint                | ✅       | No                     |
+| Unit tests            | ✅       | No                     |
+| Integration tests     | ✅       | No                     |
+| E2E tests             | ✅       | No                     |
+| Schema hash check     | ✅       | **Yes**                |
+| Build                 | ✅       | **Yes**                |
+
+### Environment Variables
+
+Secrets are injected from Gitea repository settings:
+
+| Secret                                                         | Test               | Production    |
+| -------------------------------------------------------------- | ------------------ | ------------- |
+| `DB_DATABASE_TEST` / `DB_DATABASE_PROD`                        | flyer-crawler-test | flyer-crawler |
+| `REDIS_PASSWORD_TEST` / `REDIS_PASSWORD_PROD`                  | \*\*\*             | \*\*\*        |
+| `VITE_GOOGLE_GENAI_API_KEY_TEST` / `VITE_GOOGLE_GENAI_API_KEY` | \*\*\*             | \*\*\*        |
+
+### Coverage Reporting
+
+Coverage reports are generated and published:
+
+```text
+https://flyer-crawler-test.projectium.com/coverage/
+```
+
+Coverage merging combines:
+
+- Unit test coverage (Vitest)
+- Integration test coverage (Vitest)
+- E2E test coverage (Vitest)
+- Server V8 coverage (c8)
+
+### Gitea Workflows
+
+| Workflow                      | Trigger      | Purpose                   |
+| ----------------------------- | ------------ | ------------------------- |
+| `deploy-to-test.yml`          | Push to main | Automated test deployment |
+| `deploy-to-prod.yml`          | Manual       | Production deployment     |
+| `manual-db-backup.yml`        | Manual       | Create database backup    |
+| `manual-db-restore.yml`       | Manual       | Restore from backup       |
+| `manual-db-reset-test.yml`    | Manual       | Reset test database       |
+| `manual-db-reset-prod.yml`    | Manual       | Reset production database |
+| `manual-deploy-major.yml`     | Manual       | Major version release     |
+| `manual-redis-flush-prod.yml` | Manual       | Flush Redis cache         |
+
+## Key Files
+
+- `.gitea/workflows/deploy-to-test.yml` - Test deployment pipeline
+- `.gitea/workflows/deploy-to-prod.yml` - Production deployment pipeline
+- `.gitea/workflows/manual-db-backup.yml` - Database backup workflow
+- `ecosystem.config.cjs` - PM2 configuration
+
+## Related ADRs
+
+- [ADR-014](./0014-containerization-and-deployment-strategy.md) - Containerization Strategy
+- [ADR-010](./0010-testing-strategy-and-standards.md) - Testing Strategy
+- [ADR-019](./0019-data-backup-and-recovery-strategy.md) - Backup Strategy

docs/adr/0019-data-backup-and-recovery-strategy.md

@@ -2,7 +2,9 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
 
 ## Context
 
@@ -16,3 +18,210 @@ We will implement a formal data backup and recovery strategy. This will involve
 
 - **Positive**: Protects against catastrophic data loss, ensuring business continuity. Provides a clear, tested plan for disaster recovery.
 - **Negative**: Requires setup and maintenance of backup scripts and secure storage. Incurs storage costs for backup files.
+
+## Implementation Details
+
+### Backup Workflow
+
+Located in `.gitea/workflows/manual-db-backup.yml`:
+
+```yaml
+name: Manual - Backup Production Database
+
+on:
+  workflow_dispatch:
+    inputs:
+      confirmation:
+        description: 'Type "backup-production-db" to confirm'
+        required: true
+
+jobs:
+  backup-database:
+    runs-on: projectium.com
+
+    env:
+      DB_HOST: ${{ secrets.DB_HOST }}
+      DB_PORT: ${{ secrets.DB_PORT }}
+      DB_USER: ${{ secrets.DB_USER }}
+      DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
+      DB_NAME: ${{ secrets.DB_NAME_PROD }}
+
+    steps:
+      - name: Validate Secrets
+        run: |
+          if [ -z "$DB_HOST" ] || [ -z "$DB_USER" ]; then
+            echo "ERROR: Database secrets not configured."
+            exit 1
+          fi
+
+      - name: Create Database Backup
+        run: |
+          TIMESTAMP=$(date +'%Y%m%d-%H%M%S')
+          BACKUP_FILENAME="flyer-crawler-prod-backup-${TIMESTAMP}.sql.gz"
+
+          # Create compressed backup
+          PGPASSWORD="$DB_PASSWORD" pg_dump \
+            -h "$DB_HOST" -p "$DB_PORT" \
+            -U "$DB_USER" -d "$DB_NAME" \
+            --clean --if-exists | gzip > "$BACKUP_FILENAME"
+
+          echo "backup_filename=$BACKUP_FILENAME" >> $GITEA_ENV
+
+      - name: Upload Backup as Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: database-backup
+          path: ${{ env.backup_filename }}
+```
+
+### Restore Workflow
+
+Located in `.gitea/workflows/manual-db-restore.yml`:
+
+```yaml
+name: Manual - Restore Database from Backup
+
+on:
+  workflow_dispatch:
+    inputs:
+      confirmation:
+        description: 'Type "restore-from-backup" to confirm'
+        required: true
+      backup_file:
+        description: 'Path to backup file on server'
+        required: true
+
+jobs:
+  restore-database:
+    steps:
+      - name: Verify Confirmation
+        run: |
+          if [ "${{ inputs.confirmation }}" != "restore-from-backup" ]; then
+            exit 1
+          fi
+
+      - name: Restore Database
+        run: |
+          # Decompress and restore
+          gunzip -c "${{ inputs.backup_file }}" | \
+            PGPASSWORD="$DB_PASSWORD" psql \
+              -h "$DB_HOST" -p "$DB_PORT" \
+              -U "$DB_USER" -d "$DB_NAME"
+```
+
+### Backup Command Reference
+
+**Manual Backup**:
+
+```bash
+# Create compressed backup
+PGPASSWORD="password" pg_dump \
+  -h localhost -p 5432 \
+  -U dbuser -d flyer-crawler \
+  --clean --if-exists | gzip > backup-$(date +%Y%m%d).sql.gz
+
+# List backup contents (without restoring)
+gunzip -c backup-20260109.sql.gz | head -100
+```
+
+**Manual Restore**:
+
+```bash
+# Restore from compressed backup
+gunzip -c backup-20260109.sql.gz | \
+  PGPASSWORD="password" psql \
+    -h localhost -p 5432 \
+    -U dbuser -d flyer-crawler
+```
+
+### pg_dump Options
+
+| Option            | Purpose                        |
+| ----------------- | ------------------------------ |
+| `--clean`         | Drop objects before recreating |
+| `--if-exists`     | Use IF EXISTS when dropping    |
+| `--no-owner`      | Skip ownership commands        |
+| `--no-privileges` | Skip access privilege commands |
+| `-F c`            | Custom format (for pg_restore) |
+| `-F p`            | Plain text SQL (default)       |
+
+### Recovery Objectives
+
+| Metric                             | Target   | Current        |
+| ---------------------------------- | -------- | -------------- |
+| **RPO** (Recovery Point Objective) | 24 hours | Manual trigger |
+| **RTO** (Recovery Time Objective)  | 1 hour   | ~15 minutes    |
+
+### Backup Retention Policy
+
+| Type            | Retention | Storage          |
+| --------------- | --------- | ---------------- |
+| Daily backups   | 7 days    | Gitea artifacts  |
+| Weekly backups  | 4 weeks   | Gitea artifacts  |
+| Monthly backups | 12 months | Off-site storage |
+
+### Backup Verification
+
+Periodically test backup integrity:
+
+```bash
+# Verify backup can be read
+gunzip -t backup-20260109.sql.gz
+
+# Test restore to a temporary database
+createdb flyer-crawler-restore-test
+gunzip -c backup-20260109.sql.gz | psql -d flyer-crawler-restore-test
+# Verify data integrity...
+dropdb flyer-crawler-restore-test
+```
+
+### Disaster Recovery Checklist
+
+1. **Identify the Issue**
+   - Data corruption?
+   - Accidental deletion?
+   - Full database loss?
+
+2. **Select Backup**
+   - Find most recent valid backup
+   - Download from Gitea artifacts or off-site storage
+
+3. **Stop Application**
+
+   ```bash
+   pm2 stop all
+   ```
+
+4. **Restore Database**
+
+   ```bash
+   gunzip -c backup.sql.gz | psql -d flyer-crawler
+   ```
+
+5. **Verify Data**
+   - Check table row counts
+   - Verify recent data exists
+   - Test critical queries
+
+6. **Restart Application**
+
+   ```bash
+   pm2 start all
+   ```
+
+7. **Post-Mortem**
+   - Document incident
+   - Update procedures if needed
+
+## Key Files
+
+- `.gitea/workflows/manual-db-backup.yml` - Backup workflow
+- `.gitea/workflows/manual-db-restore.yml` - Restore workflow
+- `.gitea/workflows/manual-db-reset-test.yml` - Reset test database
+- `.gitea/workflows/manual-db-reset-prod.yml` - Reset production database
+- `sql/master_schema_rollup.sql` - Current schema definition
+
+## Related ADRs
+
+- [ADR-013](./0013-database-schema-migration-strategy.md) - Schema Migration Strategy
+- [ADR-017](./0017-ci-cd-and-branching-strategy.md) - CI/CD Strategy

docs/adr/0020-health-checks-and-liveness-readiness-probes.md

@@ -2,7 +2,9 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
 
 ## Context
 
@@ -20,3 +22,195 @@ We will implement dedicated health check endpoints in the Express application.
 
 - **Positive**: Enables robust, automated application lifecycle management in a containerized environment. Prevents traffic from being sent to unhealthy or uninitialized application instances.
 - **Negative**: Adds a small amount of code for the health check endpoints. Requires configuration in the container orchestration layer.
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ **Liveness Probe** (`/api/health/live`) - Simple process health check
+- ✅ **Readiness Probe** (`/api/health/ready`) - Comprehensive dependency health check
+- ✅ **Startup Probe** (`/api/health/startup`) - Initial startup verification
+- ✅ **Individual Service Checks** - Database, Redis, Storage endpoints
+- ✅ **Detailed Health Response** - Service latency, status, and details
+
+## Implementation Details
+
+### Probe Endpoints
+
+| Endpoint              | Purpose         | Checks             | HTTP Status                   |
+| --------------------- | --------------- | ------------------ | ----------------------------- |
+| `/api/health/live`    | Liveness probe  | Process running    | 200 = alive                   |
+| `/api/health/ready`   | Readiness probe | DB, Redis, Storage | 200 = ready, 503 = not ready  |
+| `/api/health/startup` | Startup probe   | Database only      | 200 = started, 503 = starting |
+
+### Liveness Probe
+
+The liveness probe is intentionally simple with no external dependencies:
+
+```typescript
+// GET /api/health/live
+{
+  "status": "ok",
+  "timestamp": "2026-01-09T12:00:00.000Z"
+}
+```
+
+**Usage**: If this endpoint fails to respond, the container should be restarted.
+
+### Readiness Probe
+
+The readiness probe checks all critical dependencies:
+
+```typescript
+// GET /api/health/ready
+{
+  "status": "healthy",  // healthy | degraded | unhealthy
+  "timestamp": "2026-01-09T12:00:00.000Z",
+  "uptime": 3600.5,
+  "services": {
+    "database": {
+      "status": "healthy",
+      "latency": 5,
+      "details": {
+        "totalConnections": 10,
+        "idleConnections": 8,
+        "waitingConnections": 0
+      }
+    },
+    "redis": {
+      "status": "healthy",
+      "latency": 2
+    },
+    "storage": {
+      "status": "healthy",
+      "latency": 1,
+      "details": {
+        "path": "/var/www/.../flyer-images"
+      }
+    }
+  }
+}
+```
+
+**Status Logic**:
+
+- `healthy` - All critical services (database, Redis) are healthy
+- `degraded` - Some non-critical issues (high connection wait, storage issues)
+- `unhealthy` - Critical service unavailable (returns 503)
+
+### Startup Probe
+
+The startup probe is used during container initialization:
+
+```typescript
+// GET /api/health/startup
+// Success (200):
+{
+  "status": "started",
+  "timestamp": "2026-01-09T12:00:00.000Z",
+  "database": { "status": "healthy", "latency": 5 }
+}
+
+// Still starting (503):
+{
+  "status": "starting",
+  "message": "Waiting for database connection",
+  "database": { "status": "unhealthy", "message": "..." }
+}
+```
+
+### Individual Service Endpoints
+
+For detailed diagnostics:
+
+| Endpoint                | Purpose                         |
+| ----------------------- | ------------------------------- |
+| `/api/health/ping`      | Simple server responsiveness    |
+| `/api/health/db-schema` | Verify database tables exist    |
+| `/api/health/db-pool`   | Database connection pool status |
+| `/api/health/redis`     | Redis connectivity              |
+| `/api/health/storage`   | File storage accessibility      |
+| `/api/health/time`      | Server time synchronization     |
+
+## Kubernetes Configuration Example
+
+```yaml
+apiVersion: v1
+kind: Pod
+spec:
+  containers:
+    - name: flyer-crawler
+      livenessProbe:
+        httpGet:
+          path: /api/health/live
+          port: 3001
+        initialDelaySeconds: 10
+        periodSeconds: 15
+        failureThreshold: 3
+
+      readinessProbe:
+        httpGet:
+          path: /api/health/ready
+          port: 3001
+        initialDelaySeconds: 5
+        periodSeconds: 10
+        failureThreshold: 3
+
+      startupProbe:
+        httpGet:
+          path: /api/health/startup
+          port: 3001
+        initialDelaySeconds: 0
+        periodSeconds: 5
+        failureThreshold: 30 # Allow up to 150 seconds for startup
+```
+
+## Docker Compose Configuration Example
+
+```yaml
+services:
+  api:
+    image: flyer-crawler:latest
+    healthcheck:
+      test: ['CMD', 'curl', '-f', 'http://localhost:3001/api/health/ready']
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+```
+
+## PM2 Configuration Example
+
+For non-containerized deployments using PM2:
+
+```javascript
+// ecosystem.config.js
+module.exports = {
+  apps: [
+    {
+      name: 'flyer-crawler',
+      script: 'dist/server.js',
+      // PM2 will check this endpoint
+      // and restart if it fails
+      health_check: {
+        url: 'http://localhost:3001/api/health/ready',
+        interval: 30000,
+        timeout: 10000,
+      },
+    },
+  ],
+};
+```
+
+## Key Files
+
+- `src/routes/health.routes.ts` - Health check endpoint implementations
+- `server.ts` - Health routes mounted at `/api/health`
+
+## Service Health Thresholds
+
+| Service  | Healthy                | Degraded                | Unhealthy           |
+| -------- | ---------------------- | ----------------------- | ------------------- |
+| Database | Responds to `SELECT 1` | > 3 waiting connections | Connection fails    |
+| Redis    | `PING` returns `PONG`  | N/A                     | Connection fails    |
+| Storage  | Write access to path   | N/A                     | Path not accessible |

docs/adr/0021-code-formatting-and-linting-unification.md

@@ -2,7 +2,9 @@
 
 **Date**: 2025-12-12
 
-**Status**: Proposed
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
 
 ## Context
 
@@ -10,10 +12,203 @@ The project contains both frontend (React) and backend (Node.js) code. While lin
 
 ## Decision
 
-We will mandate the use of **Prettier** for automated code formatting and a unified **ESLint** configuration for code quality rules across both frontend and backend. This will be enforced automatically using a pre-commit hook managed by a tool like **Husky**.
+We will mandate the use of **Prettier** for automated code formatting and a unified **ESLint** configuration for code quality rules across both frontend and backend. This will be enforced automatically using a pre-commit hook managed by **Husky** and **lint-staged**.
 
 ## Consequences
 
 **Positive**: Improves developer experience and team velocity by automating code consistency. Reduces time spent on stylistic code review comments. Enhances code readability and maintainability.
 
 **Negative**: Requires an initial setup and configuration of Prettier, ESLint, and Husky. May require a one-time reformatting of the entire codebase.
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ **Prettier Configuration** - `.prettierrc` with consistent settings
+- ✅ **Prettier Ignore** - `.prettierignore` to exclude generated files
+- ✅ **ESLint Configuration** - `eslint.config.js` with TypeScript and React support
+- ✅ **ESLint + Prettier Integration** - `eslint-config-prettier` to avoid conflicts
+- ✅ **Husky Pre-commit Hooks** - Automatic enforcement on commit
+- ✅ **lint-staged** - Run linters only on staged files for performance
+
+## Implementation Details
+
+### Prettier Configuration
+
+The project uses a consistent Prettier configuration in `.prettierrc`:
+
+```json
+{
+  "semi": true,
+  "trailingComma": "all",
+  "singleQuote": true,
+  "printWidth": 100,
+  "tabWidth": 2,
+  "useTabs": false,
+  "endOfLine": "auto"
+}
+```
+
+### ESLint Configuration
+
+ESLint is configured with:
+
+- TypeScript support via `typescript-eslint`
+- React hooks rules via `eslint-plugin-react-hooks`
+- React Refresh support for HMR
+- Prettier compatibility via `eslint-config-prettier`
+- **Relaxed rules for test files** (see below)
+
+```javascript
+// eslint.config.js (ESLint v9 flat config)
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+import pluginReact from 'eslint-plugin-react';
+import pluginReactHooks from 'eslint-plugin-react-hooks';
+import pluginReactRefresh from 'eslint-plugin-react-refresh';
+import eslintConfigPrettier from 'eslint-config-prettier';
+
+export default tseslint.config(
+  // ... configurations
+  eslintConfigPrettier, // Must be last to override formatting rules
+);
+```
+
+### Relaxed Linting Rules for Test Files
+
+**Decision Date**: 2026-01-09
+
+**Status**: Active (revisit when product nears final release)
+
+The following ESLint rules are relaxed for test files (`*.test.ts`, `*.test.tsx`, `*.spec.ts`, `*.spec.tsx`):
+
+| Rule                                 | Setting | Rationale                                                                                                  |
+| ------------------------------------ | ------- | ---------------------------------------------------------------------------------------------------------- |
+| `@typescript-eslint/no-explicit-any` | `off`   | Mocking complexity often requires `any`; strict typing in tests adds friction without proportional benefit |
+
+**Rationale**:
+
+1. **Tests are not production code** - The primary goal of tests is verifying behavior, not type safety of the test code itself
+2. **Mocking complexity** - Mocking libraries often require type gymnastics; `any` simplifies creating partial mocks and test doubles
+3. **Testing edge cases** - Sometimes tests intentionally pass invalid types to verify error handling
+4. **Development velocity** - Strict typing in tests slows down test writing without proportional benefit during active development
+
+**Future Consideration**: This decision should be revisited when the product is nearing its final stages. At that point, stricter linting in tests may be warranted to ensure long-term maintainability.
+
+```javascript
+// eslint.config.js - Test file overrides
+{
+  files: ['**/*.test.ts', '**/*.test.tsx', '**/*.spec.ts', '**/*.spec.tsx'],
+  rules: {
+    '@typescript-eslint/no-explicit-any': 'off',
+  },
+}
+```
+
+### Pre-commit Hook
+
+The pre-commit hook runs lint-staged automatically:
+
+```bash
+# .husky/pre-commit
+npx lint-staged
+```
+
+### lint-staged Configuration
+
+lint-staged runs appropriate tools based on file type:
+
+```json
+{
+  "*.{js,jsx,ts,tsx}": ["eslint --fix", "prettier --write"],
+  "*.{json,md,css,html,yml,yaml}": ["prettier --write"]
+}
+```
+
+### NPM Scripts
+
+| Script             | Description                                    |
+| ------------------ | ---------------------------------------------- |
+| `npm run format`   | Format all files with Prettier                 |
+| `npm run lint`     | Run ESLint on all TypeScript/JavaScript files  |
+| `npm run validate` | Run Prettier check + TypeScript check + ESLint |
+
+## Key Files
+
+| File                 | Purpose                          |
+| -------------------- | -------------------------------- |
+| `.prettierrc`        | Prettier configuration           |
+| `.prettierignore`    | Files to exclude from formatting |
+| `eslint.config.js`   | ESLint flat configuration (v9)   |
+| `.husky/pre-commit`  | Pre-commit hook script           |
+| `.lintstagedrc.json` | lint-staged configuration        |
+
+## Developer Workflow
+
+### Automatic Formatting on Commit
+
+When you commit changes:
+
+1. Husky intercepts the commit
+2. lint-staged identifies staged files
+3. ESLint fixes auto-fixable issues
+4. Prettier formats the code
+5. Changes are automatically staged
+6. Commit proceeds if no errors
+
+### Manual Formatting
+
+```bash
+# Format entire codebase
+npm run format
+
+# Check formatting without changes
+npx prettier --check .
+
+# Run ESLint
+npm run lint
+
+# Run all validation checks
+npm run validate
+```
+
+### IDE Integration
+
+For the best experience, configure your IDE:
+
+**VS Code** - Install extensions:
+
+- Prettier - Code formatter
+- ESLint
+
+Add to `.vscode/settings.json`:
+
+```json
+{
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.formatOnSave": true,
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": "explicit"
+  }
+}
+```
+
+## Troubleshooting
+
+### "eslint --fix failed"
+
+ESLint may fail on unfixable errors. Review the output and manually fix the issues.
+
+### "prettier --write failed"
+
+Check for syntax errors in the file that prevent parsing.
+
+### Bypassing Hooks (Emergency)
+
+In rare cases, you may need to bypass hooks:
+
+```bash
+git commit --no-verify -m "emergency fix"
+```
+
+Use sparingly - the CI pipeline will still catch formatting issues.

docs/adr/0026-standardized-client-side-structured-logging.md

@@ -2,7 +2,7 @@
 
 **Date**: 2025-12-14
 
-**Status**: Proposed
+**Status**: Adopted
 
 ## Context
 

docs/adr/0028-api-response-standardization.md

@@ -0,0 +1,177 @@
+# ADR-028: API Response Standardization and Envelope Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Implemented
+
+## Context
+
+The API currently has inconsistent response formats across different endpoints:
+
+1. Some endpoints return raw data arrays (`[{...}, {...}]`)
+2. Some return wrapped objects (`{ data: [...] }`)
+3. Pagination is handled inconsistently (some use `page`/`limit`, others use `offset`/`count`)
+4. Error responses vary in structure between middleware and route handlers
+5. No standard for including metadata (pagination info, request timing, etc.)
+
+This inconsistency creates friction for:
+
+- Frontend developers who must handle multiple response formats
+- API documentation and client SDK generation
+- Implementing consistent error handling across the application
+- Future API versioning transitions
+
+## Decision
+
+We will adopt a standardized response envelope pattern for all API responses.
+
+### Success Response Format
+
+```typescript
+interface ApiSuccessResponse<T> {
+  success: true;
+  data: T;
+  meta?: {
+    // Pagination (when applicable)
+    pagination?: {
+      page: number;
+      limit: number;
+      total: number;
+      totalPages: number;
+      hasNextPage: boolean;
+      hasPrevPage: boolean;
+    };
+    // Timing
+    requestId?: string;
+    timestamp?: string;
+    duration?: number;
+  };
+}
+```
+
+### Error Response Format
+
+```typescript
+interface ApiErrorResponse {
+  success: false;
+  error: {
+    code: string; // Machine-readable error code (e.g., 'VALIDATION_ERROR')
+    message: string; // Human-readable message
+    details?: unknown; // Additional context (validation errors, etc.)
+  };
+  meta?: {
+    requestId?: string;
+    timestamp?: string;
+  };
+}
+```
+
+### Implementation Approach
+
+1. **Response Helper Functions**: Create utility functions in `src/utils/apiResponse.ts`:
+   - `sendSuccess(res, data, meta?)`
+   - `sendPaginated(res, data, pagination)`
+   - `sendError(res, code, message, details?, statusCode?)`
+
+2. **Error Handler Integration**: Update `errorHandler.ts` to use the standard error format
+
+3. **Gradual Migration**: Apply to new endpoints immediately, migrate existing endpoints incrementally
+
+4. **TypeScript Types**: Export response types for frontend consumption
+
+## Consequences
+
+### Positive
+
+- **Consistency**: All responses follow a predictable structure
+- **Type Safety**: Frontend can rely on consistent types
+- **Debugging**: Request IDs and timestamps aid in issue investigation
+- **Pagination**: Standardized pagination metadata reduces frontend complexity
+- **API Evolution**: Envelope pattern makes it easier to add fields without breaking changes
+
+### Negative
+
+- **Verbosity**: Responses are slightly larger due to envelope overhead
+- **Migration Effort**: Existing endpoints need updating
+- **Learning Curve**: Developers must learn and use the helper functions
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ Created `src/utils/apiResponse.ts` with helper functions (`sendSuccess`, `sendPaginated`, `sendError`, `sendNoContent`, `sendMessage`, `calculatePagination`)
+- ✅ Created `src/types/api.ts` with response type definitions (`ApiSuccessResponse`, `ApiErrorResponse`, `PaginationMeta`, `ErrorCode`)
+- ✅ Updated `src/middleware/errorHandler.ts` to use standard error format
+- ✅ Migrated all route files to use standardized responses:
+  - `health.routes.ts`
+  - `flyer.routes.ts`
+  - `deals.routes.ts`
+  - `budget.routes.ts`
+  - `personalization.routes.ts`
+  - `price.routes.ts`
+  - `reactions.routes.ts`
+  - `stats.routes.ts`
+  - `system.routes.ts`
+  - `gamification.routes.ts`
+  - `recipe.routes.ts`
+  - `auth.routes.ts`
+  - `user.routes.ts`
+  - `admin.routes.ts`
+  - `ai.routes.ts`
+
+### Error Codes
+
+The following error codes are defined in `src/types/api.ts`:
+
+| Code                     | HTTP Status | Description                         |
+| ------------------------ | ----------- | ----------------------------------- |
+| `VALIDATION_ERROR`       | 400         | Request validation failed           |
+| `BAD_REQUEST`            | 400         | Malformed request                   |
+| `UNAUTHORIZED`           | 401         | Authentication required             |
+| `FORBIDDEN`              | 403         | Insufficient permissions            |
+| `NOT_FOUND`              | 404         | Resource not found                  |
+| `CONFLICT`               | 409         | Resource conflict (e.g., duplicate) |
+| `RATE_LIMITED`           | 429         | Too many requests                   |
+| `PAYLOAD_TOO_LARGE`      | 413         | Request body too large              |
+| `INTERNAL_ERROR`         | 500         | Server error                        |
+| `NOT_IMPLEMENTED`        | 501         | Feature not yet implemented         |
+| `SERVICE_UNAVAILABLE`    | 503         | Service temporarily unavailable     |
+| `EXTERNAL_SERVICE_ERROR` | 502         | External service failure            |
+
+## Example Usage
+
+```typescript
+// In a route handler
+router.get('/flyers', async (req, res, next) => {
+  try {
+    const { page = 1, limit = 20 } = req.query;
+    const { flyers, total } = await flyerService.getFlyers({ page, limit });
+
+    return sendPaginated(res, flyers, {
+      page,
+      limit,
+      total,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// Response:
+// {
+//   "success": true,
+//   "data": [...],
+//   "meta": {
+//     "pagination": {
+//       "page": 1,
+//       "limit": 20,
+//       "total": 150,
+//       "totalPages": 8,
+//       "hasNextPage": true,
+//       "hasPrevPage": false
+//     },
+//     "requestId": "abc-123",
+//     "timestamp": "2026-01-09T12:00:00.000Z"
+//   }
+// }
+```

docs/adr/0029-secret-rotation-and-key-management.md

@@ -0,0 +1,147 @@
+# ADR-029: Secret Rotation and Key Management Strategy
+
+**Date**: 2026-01-09
+
+**Status**: Proposed
+
+## Context
+
+While ADR-007 covers configuration validation at startup, it does not address the lifecycle management of secrets:
+
+1. **JWT Secrets**: If the JWT_SECRET is rotated, all existing user sessions are immediately invalidated
+2. **Database Credentials**: No documented procedure for rotating database passwords without downtime
+3. **API Keys**: External service API keys (AI services, geocoding) have no rotation strategy
+4. **Emergency Revocation**: No process for immediately invalidating compromised credentials
+
+Current risks:
+
+- Long-lived secrets that never change become high-value targets
+- No ability to rotate secrets without application restart
+- No audit trail of when secrets were last rotated
+- Compromised keys could remain active indefinitely
+
+## Decision
+
+We will implement a comprehensive secret rotation and key management strategy.
+
+### 1. JWT Secret Rotation with Dual-Key Support
+
+Support multiple JWT secrets simultaneously to enable zero-downtime rotation:
+
+```typescript
+// Environment variables
+JWT_SECRET = current_secret;
+JWT_SECRET_PREVIOUS = old_secret; // Optional, for transition period
+
+// Token verification tries current first, falls back to previous
+const verifyToken = (token: string) => {
+  try {
+    return jwt.verify(token, process.env.JWT_SECRET);
+  } catch {
+    if (process.env.JWT_SECRET_PREVIOUS) {
+      return jwt.verify(token, process.env.JWT_SECRET_PREVIOUS);
+    }
+    throw new AuthenticationError('Invalid token');
+  }
+};
+```
+
+### 2. Database Credential Rotation
+
+Document and implement a procedure for PostgreSQL credential rotation:
+
+1. Create new database user with identical permissions
+2. Update application configuration to use new credentials
+3. Restart application instances (rolling restart)
+4. Remove old database user after all instances updated
+5. Log rotation event for audit purposes
+
+### 3. API Key Management
+
+For external service API keys (Google AI, geocoding services):
+
+1. **Naming Convention**: `{SERVICE}_API_KEY` and `{SERVICE}_API_KEY_PREVIOUS`
+2. **Fallback Logic**: Try primary key, fall back to previous on 401/403
+3. **Health Checks**: Validate API keys on startup
+4. **Usage Logging**: Track which key is being used for each request
+
+### 4. Emergency Revocation Procedures
+
+Document emergency procedures for:
+
+- **JWT Compromise**: Set new JWT_SECRET, clear all refresh tokens from database
+- **Database Compromise**: Rotate credentials immediately, audit access logs
+- **API Key Compromise**: Regenerate at provider, update environment, restart
+
+### 5. Secret Audit Trail
+
+Track secret lifecycle events:
+
+- When secrets were last rotated
+- Who initiated the rotation
+- Which instances are using which secrets
+
+## Implementation Approach
+
+### Phase 1: Dual JWT Secret Support
+
+- Modify token verification to support fallback secret
+- Add JWT_SECRET_PREVIOUS to configuration schema
+- Update documentation
+
+### Phase 2: Rotation Scripts
+
+- Create `scripts/rotate-jwt-secret.sh`
+- Create `scripts/rotate-db-credentials.sh`
+- Add rotation instructions to operations runbook
+
+### Phase 3: API Key Fallback
+
+- Wrap external API clients with fallback logic
+- Add key validation to health checks
+- Implement key usage logging
+
+## Consequences
+
+### Positive
+
+- **Zero-Downtime Rotation**: Secrets can be rotated without invalidating all sessions
+- **Reduced Risk**: Regular rotation limits exposure window for compromised credentials
+- **Audit Trail**: Clear record of when secrets were changed
+- **Emergency Response**: Documented procedures for security incidents
+
+### Negative
+
+- **Complexity**: Dual-key logic adds code complexity
+- **Operations Overhead**: Regular rotation requires operational discipline
+- **Testing**: Rotation procedures need to be tested periodically
+
+## Implementation Status
+
+### What's Implemented
+
+- ❌ Not yet implemented
+
+### What Needs To Be Done
+
+1. Implement dual JWT secret verification
+2. Create rotation scripts
+3. Document emergency procedures
+4. Add secret validation to health checks
+5. Create rotation schedule recommendations
+
+## Key Files (To Be Created)
+
+- `src/utils/secretManager.ts` - Secret rotation utilities
+- `scripts/rotate-jwt-secret.sh` - JWT rotation script
+- `scripts/rotate-db-credentials.sh` - Database credential rotation
+- `docs/operations/secret-rotation.md` - Operations runbook
+
+## Rotation Schedule Recommendations
+
+| Secret Type        | Rotation Frequency         | Grace Period      |
+| ------------------ | -------------------------- | ----------------- |
+| JWT_SECRET         | 90 days                    | 7 days (dual-key) |
+| Database Passwords | 180 days                   | Rolling restart   |
+| AI API Keys        | On suspicion of compromise | Immediate         |
+| Refresh Tokens     | 7-day max age              | N/A (per-token)   |

docs/adr/0030-graceful-degradation-and-circuit-breaker.md

@@ -0,0 +1,150 @@
+# ADR-030: Graceful Degradation and Circuit Breaker Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Proposed
+
+## Context
+
+The application depends on several external services:
+
+1. **AI Services** (Google Gemini) - For flyer item extraction
+2. **Redis** - For caching, rate limiting, and job queues
+3. **PostgreSQL** - Primary data store
+4. **Geocoding APIs** - For location services
+
+Currently, when these services fail:
+
+- AI failures may cause the entire upload to fail
+- Redis unavailability could crash the application or bypass rate limiting
+- No circuit breakers prevent repeated calls to failing services
+- No fallback behaviors are defined
+
+This creates fragility where a single service outage can cascade into application-wide failures.
+
+## Decision
+
+We will implement a graceful degradation strategy with circuit breakers for external service dependencies.
+
+### 1. Circuit Breaker Pattern
+
+Implement circuit breakers for external service calls using a library like `opossum`:
+
+```typescript
+import CircuitBreaker from 'opossum';
+
+const aiCircuitBreaker = new CircuitBreaker(callAiService, {
+  timeout: 30000, // 30 second timeout
+  errorThresholdPercentage: 50, // Open circuit at 50% failures
+  resetTimeout: 30000, // Try again after 30 seconds
+  volumeThreshold: 5, // Minimum calls before calculating error %
+});
+
+aiCircuitBreaker.on('open', () => {
+  logger.warn('AI service circuit breaker opened');
+});
+
+aiCircuitBreaker.on('halfOpen', () => {
+  logger.info('AI service circuit breaker half-open, testing...');
+});
+```
+
+### 2. Fallback Behaviors by Service
+
+| Service                | Fallback Behavior                        |
+| ---------------------- | ---------------------------------------- |
+| **Redis (Cache)**      | Skip cache, query database directly      |
+| **Redis (Rate Limit)** | Log warning, allow request (fail-open)   |
+| **Redis (Queues)**     | Queue to memory, process synchronously   |
+| **AI Service**         | Return partial results, queue for retry  |
+| **Geocoding**          | Return null location, allow manual entry |
+| **PostgreSQL**         | No fallback - critical dependency        |
+
+### 3. Health Status Aggregation
+
+Extend health checks (ADR-020) to report service-level health:
+
+```typescript
+// GET /api/health/ready response
+{
+  "status": "degraded",  // healthy | degraded | unhealthy
+  "services": {
+    "database": { "status": "healthy", "latency": 5 },
+    "redis": { "status": "healthy", "latency": 2 },
+    "ai": { "status": "degraded", "circuitState": "half-open" },
+    "geocoding": { "status": "healthy", "latency": 150 }
+  }
+}
+```
+
+### 4. Retry Strategies
+
+Define retry policies for transient failures:
+
+```typescript
+const retryConfig = {
+  ai: { maxRetries: 3, backoff: 'exponential', initialDelay: 1000 },
+  geocoding: { maxRetries: 2, backoff: 'linear', initialDelay: 500 },
+  database: { maxRetries: 3, backoff: 'exponential', initialDelay: 100 },
+};
+```
+
+## Implementation Approach
+
+### Phase 1: Redis Fallbacks
+
+- Wrap cache operations with try-catch (already partially done in cacheService)
+- Add fail-open for rate limiting when Redis is down
+- Log degraded state
+
+### Phase 2: AI Circuit Breaker
+
+- Wrap AI service calls with circuit breaker
+- Implement queue-for-retry on circuit open
+- Add manual fallback UI for failed extractions
+
+### Phase 3: Health Aggregation
+
+- Update health endpoints with service status
+- Add Prometheus-compatible metrics
+- Create dashboard for service health
+
+## Consequences
+
+### Positive
+
+- **Resilience**: Application continues functioning during partial outages
+- **User Experience**: Degraded but functional is better than complete failure
+- **Observability**: Clear visibility into service health
+- **Protection**: Circuit breakers prevent cascading failures
+
+### Negative
+
+- **Complexity**: Additional code for fallback logic
+- **Testing**: Requires testing failure scenarios
+- **Consistency**: Some operations may have different results during degradation
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ Cache operations fail gracefully (cacheService.server.ts)
+- ❌ Circuit breakers for AI services
+- ❌ Rate limit fail-open behavior
+- ❌ Health aggregation endpoint
+- ❌ Retry strategies with backoff
+
+### What Needs To Be Done
+
+1. Install and configure `opossum` circuit breaker library
+2. Wrap AI service calls with circuit breaker
+3. Add fail-open to rate limiting
+4. Extend health endpoints with service status
+5. Document degraded mode behaviors
+
+## Key Files
+
+- `src/utils/circuitBreaker.ts` - Circuit breaker configurations (to create)
+- `src/services/cacheService.server.ts` - Already has graceful fallbacks
+- `src/routes/health.routes.ts` - Health check endpoints (to extend)
+- `src/services/aiService.server.ts` - AI service wrapper (to wrap)

docs/adr/0031-data-retention-and-privacy-compliance.md

@@ -0,0 +1,199 @@
+# ADR-031: Data Retention and Privacy Compliance (GDPR/CCPA)
+
+**Date**: 2026-01-09
+
+**Status**: Proposed
+
+## Context
+
+The application stores various types of user data:
+
+1. **User Accounts**: Email, password hash, profile information
+2. **Shopping Lists**: Personal shopping preferences and history
+3. **Watch Lists**: Tracked items and price alerts
+4. **Activity Logs**: User actions for analytics and debugging
+5. **Tracking Data**: Page views, interactions, feature usage
+
+Current gaps in privacy compliance:
+
+- **No Data Retention Policies**: Activity logs accumulate indefinitely
+- **No User Data Export**: Users cannot export their data (GDPR Article 20)
+- **No User Data Deletion**: No self-service account deletion (GDPR Article 17)
+- **No Cookie Consent**: Cookie usage not disclosed or consented
+- **No Privacy Policy Enforcement**: Privacy commitments not enforced in code
+
+These gaps create legal exposure for users in EU (GDPR) and California (CCPA).
+
+## Decision
+
+We will implement comprehensive data retention and privacy compliance features.
+
+### 1. Data Retention Policies
+
+| Data Type                 | Retention Period         | Deletion Method          |
+| ------------------------- | ------------------------ | ------------------------ |
+| **Activity Logs**         | 90 days                  | Automated cleanup job    |
+| **Tracking Events**       | 30 days                  | Automated cleanup job    |
+| **Deleted User Data**     | 30 days (soft delete)    | Hard delete after period |
+| **Expired Sessions**      | 7 days after expiry      | Token cleanup job        |
+| **Failed Login Attempts** | 24 hours                 | Automated cleanup        |
+| **Flyer Data**            | Indefinite (public data) | N/A                      |
+| **User Shopping Lists**   | Until account deletion   | With account             |
+| **User Watch Lists**      | Until account deletion   | With account             |
+
+### 2. User Data Export (Right to Portability)
+
+Implement `GET /api/users/me/export` endpoint:
+
+```typescript
+interface UserDataExport {
+  exportDate: string;
+  user: {
+    email: string;
+    created_at: string;
+    profile: ProfileData;
+  };
+  shoppingLists: ShoppingList[];
+  watchedItems: WatchedItem[];
+  priceAlerts: PriceAlert[];
+  achievements: Achievement[];
+  // Exclude: password hash, internal IDs, admin flags
+}
+```
+
+Export formats: JSON (primary), CSV (optional)
+
+### 3. User Data Deletion (Right to Erasure)
+
+Implement `DELETE /api/users/me` endpoint:
+
+1. **Soft Delete**: Mark account as deleted, anonymize PII
+2. **Grace Period**: 30 days to restore account
+3. **Hard Delete**: Permanently remove all user data after grace period
+4. **Audit Log**: Record deletion request (anonymized)
+
+Deletion cascade:
+
+- User account → Anonymize email/name
+- Shopping lists → Delete
+- Watch lists → Delete
+- Achievements → Delete
+- Activity logs → Anonymize user_id
+- Sessions/tokens → Delete immediately
+
+### 4. Cookie Consent
+
+Implement cookie consent banner:
+
+```typescript
+// Cookie categories
+enum CookieCategory {
+  ESSENTIAL = 'essential', // Always allowed (auth, CSRF)
+  FUNCTIONAL = 'functional', // Dark mode, preferences
+  ANALYTICS = 'analytics', // Usage tracking
+}
+
+// Store consent in localStorage and server-side
+interface CookieConsent {
+  essential: true; // Cannot be disabled
+  functional: boolean;
+  analytics: boolean;
+  consentDate: string;
+  consentVersion: string;
+}
+```
+
+### 5. Privacy Policy Enforcement
+
+Enforce privacy commitments in code:
+
+- Email addresses never logged in plaintext
+- Passwords never logged (already in pino redact config)
+- IP addresses anonymized after 7 days
+- Third-party data sharing requires explicit consent
+
+## Implementation Approach
+
+### Phase 1: Data Retention Jobs
+
+- Create retention cleanup job in background job service
+- Add activity_log retention (90 days)
+- Add tracking_events retention (30 days)
+
+### Phase 2: User Data Export
+
+- Create export endpoint
+- Implement data aggregation query
+- Add rate limiting (1 export per 24h)
+
+### Phase 3: Account Deletion
+
+- Implement soft delete with anonymization
+- Create hard delete cleanup job
+- Add account recovery endpoint
+
+### Phase 4: Cookie Consent
+
+- Create consent banner component
+- Store consent preferences
+- Gate analytics based on consent
+
+## Consequences
+
+### Positive
+
+- **Legal Compliance**: Meets GDPR and CCPA requirements
+- **User Trust**: Demonstrates commitment to privacy
+- **Data Hygiene**: Automatic cleanup prevents data bloat
+- **Reduced Liability**: Less data = less risk
+
+### Negative
+
+- **Implementation Effort**: Significant feature development
+- **Operational Complexity**: Deletion jobs need monitoring
+- **Feature Limitations**: Some features may be limited without consent
+
+## Implementation Status
+
+### What's Implemented
+
+- ✅ Token cleanup job exists (tokenCleanupQueue)
+- ❌ Activity log retention
+- ❌ User data export endpoint
+- ❌ Account deletion endpoint
+- ❌ Cookie consent banner
+- ❌ Data anonymization functions
+
+### What Needs To Be Done
+
+1. Add activity_log cleanup to background jobs
+2. Create `/api/users/me/export` endpoint
+3. Create `/api/users/me` DELETE endpoint with soft delete
+4. Implement cookie consent UI component
+5. Document data retention in privacy policy
+6. Add anonymization utility functions
+
+## Key Files (To Be Created/Modified)
+
+- `src/services/backgroundJobService.ts` - Add retention jobs
+- `src/routes/user.routes.ts` - Add export/delete endpoints
+- `src/services/privacyService.server.ts` - Data export/deletion logic
+- `src/components/CookieConsent.tsx` - Consent banner
+- `src/utils/anonymize.ts` - Data anonymization utilities
+
+## Compliance Checklist
+
+### GDPR Requirements
+
+- [ ] Article 15: Right of Access (data export)
+- [ ] Article 17: Right to Erasure (account deletion)
+- [ ] Article 20: Right to Data Portability (JSON export)
+- [ ] Article 7: Conditions for Consent (cookie consent)
+- [ ] Article 13: Information to be Provided (privacy policy)
+
+### CCPA Requirements
+
+- [ ] Right to Know (data export)
+- [ ] Right to Delete (account deletion)
+- [ ] Right to Opt-Out (cookie consent for analytics)
+- [ ] Non-Discrimination (no feature penalty for privacy choices)

docs/adr/0032-rate-limiting-strategy.md

@@ -0,0 +1,147 @@
+# ADR-032: Rate Limiting Strategy
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+Public-facing APIs are vulnerable to abuse through excessive requests, whether from malicious actors attempting denial-of-service attacks, automated scrapers, or accidental loops in client code. Without proper rate limiting, the application could:
+
+1. **Experience degraded performance**: Excessive requests can overwhelm database connections and server resources
+2. **Incur unexpected costs**: AI service calls (Gemini API) and external APIs (Google Maps) are billed per request
+3. **Allow credential stuffing**: Login endpoints without limits enable brute-force attacks
+4. **Suffer from data scraping**: Public endpoints could be scraped at high volume
+
+## Decision
+
+We will implement a tiered rate limiting strategy using `express-rate-limit` middleware, with different limits based on endpoint sensitivity and resource cost.
+
+### Tier System
+
+| Tier                        | Window | Max Requests | Use Case                         |
+| --------------------------- | ------ | ------------ | -------------------------------- |
+| **Authentication (Strict)** | 15 min | 5            | Login, registration              |
+| **Sensitive Operations**    | 1 hour | 5            | Password changes, email updates  |
+| **AI/Costly Operations**    | 15 min | 10-20        | Gemini API calls, geocoding      |
+| **File Uploads**            | 15 min | 10-20        | Flyer uploads, avatar uploads    |
+| **Batch Operations**        | 15 min | 50           | Bulk updates                     |
+| **User Read**               | 15 min | 100          | Standard authenticated endpoints |
+| **Public Read**             | 15 min | 100          | Public data endpoints            |
+| **Tracking/High-Volume**    | 15 min | 150-200      | Analytics, reactions             |
+
+### Rate Limiter Configuration
+
+All rate limiters share a standard configuration:
+
+```typescript
+const standardConfig = {
+  standardHeaders: true, // Return rate limit info in headers
+  legacyHeaders: false, // Disable deprecated X-RateLimit headers
+  skip: shouldSkipRateLimit, // Allow bypassing in test environment
+};
+```
+
+### Test Environment Bypass
+
+Rate limiting is bypassed during integration and E2E tests to avoid test flakiness:
+
+```typescript
+export const shouldSkipRateLimit = (req: Request): boolean => {
+  return process.env.NODE_ENV === 'test';
+};
+```
+
+## Implementation Details
+
+### Available Rate Limiters
+
+| Limiter                      | Window | Max | Endpoint Examples                 |
+| ---------------------------- | ------ | --- | --------------------------------- |
+| `loginLimiter`               | 15 min | 5   | POST /api/auth/login              |
+| `registerLimiter`            | 1 hour | 5   | POST /api/auth/register           |
+| `forgotPasswordLimiter`      | 15 min | 5   | POST /api/auth/forgot-password    |
+| `resetPasswordLimiter`       | 15 min | 10  | POST /api/auth/reset-password     |
+| `refreshTokenLimiter`        | 15 min | 20  | POST /api/auth/refresh            |
+| `logoutLimiter`              | 15 min | 10  | POST /api/auth/logout             |
+| `publicReadLimiter`          | 15 min | 100 | GET /api/flyers, GET /api/recipes |
+| `userReadLimiter`            | 15 min | 100 | GET /api/users/profile            |
+| `userUpdateLimiter`          | 15 min | 100 | PUT /api/users/profile            |
+| `userSensitiveUpdateLimiter` | 1 hour | 5   | PUT /api/auth/change-password     |
+| `adminTriggerLimiter`        | 15 min | 30  | POST /api/admin/jobs/\*           |
+| `aiGenerationLimiter`        | 15 min | 20  | POST /api/ai/analyze              |
+| `aiUploadLimiter`            | 15 min | 10  | POST /api/ai/upload-and-process   |
+| `geocodeLimiter`             | 1 hour | 100 | GET /api/users/geocode            |
+| `priceHistoryLimiter`        | 15 min | 50  | GET /api/price-history/\*         |
+| `reactionToggleLimiter`      | 15 min | 150 | POST /api/reactions/toggle        |
+| `trackingLimiter`            | 15 min | 200 | POST /api/personalization/track   |
+| `batchLimiter`               | 15 min | 50  | PATCH /api/budgets/batch          |
+
+### Usage Pattern
+
+```typescript
+import { loginLimiter, userReadLimiter } from '../config/rateLimiters';
+
+// Apply to individual routes
+router.post('/login', loginLimiter, validateRequest(loginSchema), async (req, res, next) => {
+  // handler
+});
+
+// Or apply to entire router for consistent limits
+router.use(userReadLimiter);
+router.get('/me', async (req, res, next) => {
+  /* handler */
+});
+```
+
+### Response Headers
+
+When rate limiting is active, responses include standard headers:
+
+```
+RateLimit-Limit: 100
+RateLimit-Remaining: 95
+RateLimit-Reset: 900
+```
+
+### Rate Limit Exceeded Response
+
+When a client exceeds their limit:
+
+```json
+{
+  "message": "Too many login attempts from this IP, please try again after 15 minutes."
+}
+```
+
+HTTP Status: `429 Too Many Requests`
+
+## Key Files
+
+- `src/config/rateLimiters.ts` - Rate limiter definitions
+- `src/utils/rateLimit.ts` - Helper functions (test bypass)
+
+## Consequences
+
+### Positive
+
+- **Security**: Protects against brute-force and credential stuffing attacks
+- **Cost Control**: Prevents runaway costs from AI/external API abuse
+- **Fair Usage**: Ensures all users get reasonable service access
+- **DDoS Mitigation**: Provides basic protection against request flooding
+
+### Negative
+
+- **Legitimate User Impact**: Aggressive users may hit limits during normal use
+- **IP-Based Limitations**: Shared IPs (offices, VPNs) may cause false positives
+- **No Distributed State**: Rate limits are per-instance, not cluster-wide (would need Redis store for that)
+
+## Future Enhancements
+
+1. **Redis Store**: Implement distributed rate limiting with Redis for multi-instance deployments
+2. **User-Based Limits**: Track limits per authenticated user rather than just IP
+3. **Dynamic Limits**: Adjust limits based on user tier (free vs premium)
+4. **Monitoring Dashboard**: Track rate limit hits in admin dashboard
+5. **Allowlisting**: Allow specific IPs (monitoring services) to bypass limits

docs/adr/0033-file-upload-and-storage-strategy.md

@@ -0,0 +1,196 @@
+# ADR-033: File Upload and Storage Strategy
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+The application handles file uploads for flyer images and user avatars. Without a consistent strategy, file uploads can introduce security vulnerabilities (path traversal, malicious file types), performance issues (unbounded file sizes), and maintenance challenges (inconsistent storage locations).
+
+Key concerns:
+
+1. **Security**: Preventing malicious file uploads, path traversal attacks, and unsafe filenames
+2. **Storage Organization**: Consistent directory structure for uploaded files
+3. **Size Limits**: Preventing resource exhaustion from oversized uploads
+4. **File Type Validation**: Ensuring only expected file types are accepted
+5. **Cleanup**: Managing temporary and orphaned files
+
+## Decision
+
+We will implement a centralized file upload strategy using `multer` middleware with custom storage configurations, file type validation, and size limits.
+
+### Storage Types
+
+| Type     | Directory                      | Purpose                        | Size Limit |
+| -------- | ------------------------------ | ------------------------------ | ---------- |
+| `flyer`  | `$STORAGE_PATH` (configurable) | Flyer images for AI processing | 100MB      |
+| `avatar` | `public/uploads/avatars/`      | User profile pictures          | 5MB        |
+
+### Filename Strategy
+
+All uploaded files are renamed to prevent:
+
+- Path traversal attacks
+- Filename collisions
+- Problematic characters in filenames
+
+**Pattern**: `{fieldname}-{timestamp}-{random}-{sanitized-original}`
+
+Example: `flyer-1704825600000-829461742-grocery-flyer.jpg`
+
+### File Type Validation
+
+Only image files (`image/*` MIME type) are accepted. Non-image uploads are rejected with a structured `ValidationError`.
+
+## Implementation Details
+
+### Multer Configuration Factory
+
+```typescript
+import { createUploadMiddleware } from '../middleware/multer.middleware';
+
+// For flyer uploads (100MB limit)
+const flyerUpload = createUploadMiddleware({
+  storageType: 'flyer',
+  fileSize: 100 * 1024 * 1024, // 100MB
+  fileFilter: 'image',
+});
+
+// For avatar uploads (5MB limit)
+const avatarUpload = createUploadMiddleware({
+  storageType: 'avatar',
+  fileSize: 5 * 1024 * 1024, // 5MB
+  fileFilter: 'image',
+});
+```
+
+### Storage Configuration
+
+```typescript
+// Configurable via environment variable
+export const flyerStoragePath =
+  process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
+
+// Relative to project root
+export const avatarStoragePath = path.join(process.cwd(), 'public', 'uploads', 'avatars');
+```
+
+### Filename Sanitization
+
+The `sanitizeFilename` utility removes dangerous characters:
+
+```typescript
+// Removes: path separators, null bytes, special characters
+// Keeps: alphanumeric, dots, hyphens, underscores
+const sanitized = sanitizeFilename(file.originalname);
+```
+
+### Required File Validation Middleware
+
+Ensures a file was uploaded before processing:
+
+```typescript
+import { requireFileUpload } from '../middleware/fileUpload.middleware';
+
+router.post(
+  '/upload',
+  flyerUpload.single('flyerImage'),
+  requireFileUpload('flyerImage'), // 400 error if missing
+  handleMulterError,
+  async (req, res) => {
+    // req.file is guaranteed to exist
+  },
+);
+```
+
+### Error Handling
+
+```typescript
+import { handleMulterError } from '../middleware/multer.middleware';
+
+// Catches multer-specific errors (file too large, etc.)
+router.use(handleMulterError);
+```
+
+### Directory Initialization
+
+Storage directories are created automatically at application startup:
+
+```typescript
+(async () => {
+  await fs.mkdir(flyerStoragePath, { recursive: true });
+  await fs.mkdir(avatarStoragePath, { recursive: true });
+})();
+```
+
+### Test Environment Handling
+
+In test environments, files use predictable names for easy cleanup:
+
+```typescript
+if (process.env.NODE_ENV === 'test') {
+  return cb(null, `test-avatar${path.extname(file.originalname) || '.png'}`);
+}
+```
+
+## Usage Example
+
+```typescript
+import { createUploadMiddleware, handleMulterError } from '../middleware/multer.middleware';
+import { requireFileUpload } from '../middleware/fileUpload.middleware';
+import { validateRequest } from '../middleware/validation.middleware';
+import { aiUploadLimiter } from '../config/rateLimiters';
+
+const flyerUpload = createUploadMiddleware({
+  storageType: 'flyer',
+  fileSize: 100 * 1024 * 1024,
+  fileFilter: 'image',
+});
+
+router.post(
+  '/upload-and-process',
+  aiUploadLimiter,
+  validateRequest(uploadSchema),
+  flyerUpload.single('flyerImage'),
+  requireFileUpload('flyerImage'),
+  handleMulterError,
+  async (req, res, next) => {
+    const filePath = req.file!.path;
+    // Process the uploaded file...
+  },
+);
+```
+
+## Key Files
+
+- `src/middleware/multer.middleware.ts` - Multer configuration and storage handlers
+- `src/middleware/fileUpload.middleware.ts` - File requirement validation
+- `src/utils/stringUtils.ts` - Filename sanitization utilities
+- `src/utils/fileUtils.ts` - File system utilities (deletion, etc.)
+
+## Consequences
+
+### Positive
+
+- **Security**: Prevents path traversal and malicious uploads through sanitization and validation
+- **Consistency**: All uploads follow the same patterns and storage organization
+- **Predictability**: Test environments use predictable filenames for cleanup
+- **Extensibility**: Factory pattern allows easy addition of new upload types
+
+### Negative
+
+- **Disk Storage**: Files stored on disk require backup and cleanup strategies
+- **Single Server**: Current implementation doesn't support cloud storage (S3, etc.)
+- **No Virus Scanning**: Files aren't scanned for malware before processing
+
+## Future Enhancements
+
+1. **Cloud Storage**: Support for S3/GCS as storage backend
+2. **Virus Scanning**: Integrate ClamAV or cloud-based scanning
+3. **Image Optimization**: Automatic resizing/compression before storage
+4. **CDN Integration**: Serve uploaded files through CDN
+5. **Cleanup Job**: Scheduled job to remove orphaned/temporary files
+6. **Presigned URLs**: Direct upload to cloud storage to reduce server load

docs/adr/0034-repository-pattern-standards.md

@@ -0,0 +1,345 @@
+# ADR-034: Repository Pattern Standards
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+The application uses a repository pattern to abstract database access from business logic. However, without clear standards, repository implementations can diverge in:
+
+1. **Method naming**: Inconsistent verbs (get vs find vs fetch)
+2. **Return types**: Some methods return `undefined`, others throw errors
+3. **Error handling**: Varied approaches to database error handling
+4. **Transaction participation**: Unclear how methods participate in transactions
+5. **Logging patterns**: Inconsistent logging context and messages
+
+This ADR establishes standards for all repository implementations, complementing ADR-001 (Error Handling) and ADR-002 (Transaction Management).
+
+## Decision
+
+All repository implementations MUST follow these standards:
+
+### Method Naming Conventions
+
+| Prefix    | Returns                | Behavior on Not Found                |
+| --------- | ---------------------- | ------------------------------------ |
+| `get*`    | Single entity          | Throws `NotFoundError`               |
+| `find*`   | Entity or `null`       | Returns `null`                       |
+| `list*`   | Array (possibly empty) | Returns `[]`                         |
+| `create*` | Created entity         | Throws on constraint violation       |
+| `update*` | Updated entity         | Throws `NotFoundError` if not exists |
+| `delete*` | `void` or `boolean`    | Throws `NotFoundError` if not exists |
+| `exists*` | `boolean`              | Returns true/false                   |
+| `count*`  | `number`               | Returns count                        |
+
+### Error Handling Pattern
+
+All repository methods MUST use the centralized `handleDbError` function:
+
+```typescript
+import { handleDbError, NotFoundError } from './errors.db';
+
+async getById(id: number): Promise<Entity> {
+  try {
+    const result = await this.pool.query('SELECT * FROM entities WHERE id = $1', [id]);
+    if (result.rows.length === 0) {
+      throw new NotFoundError(`Entity with ID ${id} not found.`);
+    }
+    return result.rows[0];
+  } catch (error) {
+    handleDbError(error, this.logger, 'Database error in getById', { id }, {
+      entityName: 'Entity',
+      defaultMessage: 'Failed to fetch entity.',
+    });
+  }
+}
+```
+
+### Transaction Participation
+
+Repository methods that need to participate in transactions MUST accept an optional `PoolClient`:
+
+```typescript
+class UserRepository {
+  private pool: Pool;
+  private client?: PoolClient;
+
+  constructor(poolOrClient?: Pool | PoolClient) {
+    if (poolOrClient && 'query' in poolOrClient && !('connect' in poolOrClient)) {
+      // It's a PoolClient (for transactions)
+      this.client = poolOrClient as PoolClient;
+    } else {
+      this.pool = (poolOrClient as Pool) || getPool();
+    }
+  }
+
+  private get queryable() {
+    return this.client || this.pool;
+  }
+}
+```
+
+Or using the function-based pattern:
+
+```typescript
+async function createUser(userData: CreateUserInput, client?: PoolClient): Promise<User> {
+  const queryable = client || getPool();
+  // ...
+}
+```
+
+## Implementation Details
+
+### Repository File Structure
+
+```
+src/services/db/
+├── connection.db.ts      # Pool management, withTransaction
+├── errors.db.ts          # Custom error types, handleDbError
+├── index.db.ts           # Barrel exports
+├── user.db.ts            # User repository
+├── user.db.test.ts       # User repository tests
+├── flyer.db.ts           # Flyer repository
+├── flyer.db.test.ts      # Flyer repository tests
+└── ...                   # Other domain repositories
+```
+
+### Standard Repository Template
+
+```typescript
+// src/services/db/example.db.ts
+import { Pool, PoolClient } from 'pg';
+import { getPool } from './connection.db';
+import { handleDbError, NotFoundError } from './errors.db';
+import { logger } from '../logger.server';
+import type { Example, CreateExampleInput, UpdateExampleInput } from '../../types';
+
+const log = logger.child({ module: 'example.db' });
+
+/**
+ * Gets an example by ID.
+ * @throws {NotFoundError} If the example doesn't exist.
+ */
+export async function getExampleById(id: number, client?: PoolClient): Promise<Example> {
+  const queryable = client || getPool();
+  try {
+    const result = await queryable.query<Example>('SELECT * FROM examples WHERE id = $1', [id]);
+    if (result.rows.length === 0) {
+      throw new NotFoundError(`Example with ID ${id} not found.`);
+    }
+    return result.rows[0];
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in getExampleById',
+      { id },
+      {
+        entityName: 'Example',
+        defaultMessage: 'Failed to fetch example.',
+      },
+    );
+  }
+}
+
+/**
+ * Finds an example by slug, returns null if not found.
+ */
+export async function findExampleBySlug(
+  slug: string,
+  client?: PoolClient,
+): Promise<Example | null> {
+  const queryable = client || getPool();
+  try {
+    const result = await queryable.query<Example>('SELECT * FROM examples WHERE slug = $1', [slug]);
+    return result.rows[0] || null;
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in findExampleBySlug',
+      { slug },
+      {
+        entityName: 'Example',
+        defaultMessage: 'Failed to find example.',
+      },
+    );
+  }
+}
+
+/**
+ * Lists all examples with optional pagination.
+ */
+export async function listExamples(
+  options: { limit?: number; offset?: number } = {},
+  client?: PoolClient,
+): Promise<Example[]> {
+  const queryable = client || getPool();
+  const { limit = 100, offset = 0 } = options;
+  try {
+    const result = await queryable.query<Example>(
+      'SELECT * FROM examples ORDER BY created_at DESC LIMIT $1 OFFSET $2',
+      [limit, offset],
+    );
+    return result.rows;
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in listExamples',
+      { limit, offset },
+      {
+        entityName: 'Example',
+        defaultMessage: 'Failed to list examples.',
+      },
+    );
+  }
+}
+
+/**
+ * Creates a new example.
+ * @throws {UniqueConstraintError} If slug already exists.
+ */
+export async function createExample(
+  input: CreateExampleInput,
+  client?: PoolClient,
+): Promise<Example> {
+  const queryable = client || getPool();
+  try {
+    const result = await queryable.query<Example>(
+      `INSERT INTO examples (name, slug, description)
+       VALUES ($1, $2, $3)
+       RETURNING *`,
+      [input.name, input.slug, input.description],
+    );
+    return result.rows[0];
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in createExample',
+      { input },
+      {
+        entityName: 'Example',
+        uniqueMessage: 'An example with this slug already exists.',
+        defaultMessage: 'Failed to create example.',
+      },
+    );
+  }
+}
+
+/**
+ * Updates an existing example.
+ * @throws {NotFoundError} If the example doesn't exist.
+ */
+export async function updateExample(
+  id: number,
+  input: UpdateExampleInput,
+  client?: PoolClient,
+): Promise<Example> {
+  const queryable = client || getPool();
+  try {
+    const result = await queryable.query<Example>(
+      `UPDATE examples
+       SET name = COALESCE($2, name), description = COALESCE($3, description)
+       WHERE id = $1
+       RETURNING *`,
+      [id, input.name, input.description],
+    );
+    if (result.rows.length === 0) {
+      throw new NotFoundError(`Example with ID ${id} not found.`);
+    }
+    return result.rows[0];
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in updateExample',
+      { id, input },
+      {
+        entityName: 'Example',
+        defaultMessage: 'Failed to update example.',
+      },
+    );
+  }
+}
+
+/**
+ * Deletes an example.
+ * @throws {NotFoundError} If the example doesn't exist.
+ */
+export async function deleteExample(id: number, client?: PoolClient): Promise<void> {
+  const queryable = client || getPool();
+  try {
+    const result = await queryable.query('DELETE FROM examples WHERE id = $1', [id]);
+    if (result.rowCount === 0) {
+      throw new NotFoundError(`Example with ID ${id} not found.`);
+    }
+  } catch (error) {
+    handleDbError(
+      error,
+      log,
+      'Database error in deleteExample',
+      { id },
+      {
+        entityName: 'Example',
+        defaultMessage: 'Failed to delete example.',
+      },
+    );
+  }
+}
+```
+
+### Using with Transactions
+
+```typescript
+import { withTransaction } from './connection.db';
+import { createExample, updateExample } from './example.db';
+import { createRelated } from './related.db';
+
+async function createExampleWithRelated(data: ComplexInput): Promise<Example> {
+  return withTransaction(async (client) => {
+    const example = await createExample(data.example, client);
+    await createRelated({ exampleId: example.id, ...data.related }, client);
+    return example;
+  });
+}
+```
+
+## Key Files
+
+- `src/services/db/connection.db.ts` - `getPool()`, `withTransaction()`
+- `src/services/db/errors.db.ts` - `handleDbError()`, custom error classes
+- `src/services/db/index.db.ts` - Barrel exports for all repositories
+- `src/services/db/*.db.ts` - Individual domain repositories
+
+## Consequences
+
+### Positive
+
+- **Consistency**: All repositories follow the same patterns
+- **Predictability**: Method names clearly indicate behavior
+- **Testability**: Consistent interfaces make mocking straightforward
+- **Error Handling**: Centralized error handling prevents inconsistent responses
+- **Transaction Safety**: Clear pattern for transaction participation
+
+### Negative
+
+- **Learning Curve**: Developers must learn and follow conventions
+- **Boilerplate**: Each method requires similar error handling structure
+- **Refactoring**: Existing repositories may need updates to conform
+
+## Compliance Checklist
+
+For new repository methods:
+
+- [ ] Method name follows prefix convention (get/find/list/create/update/delete)
+- [ ] Throws `NotFoundError` for `get*` methods when entity not found
+- [ ] Returns `null` for `find*` methods when entity not found
+- [ ] Uses `handleDbError` for database error handling
+- [ ] Accepts optional `PoolClient` parameter for transaction support
+- [ ] Includes JSDoc with `@throws` documentation
+- [ ] Has corresponding unit tests

docs/adr/0035-service-layer-architecture.md

@@ -0,0 +1,328 @@
+# ADR-035: Service Layer Architecture
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+The application has evolved to include multiple service types:
+
+1. **Repository services** (`*.db.ts`): Direct database access
+2. **Business services** (`*Service.ts`): Business logic orchestration
+3. **External services** (`*Service.server.ts`): Integration with external APIs
+4. **Infrastructure services** (`logger`, `redis`, `queues`): Cross-cutting concerns
+
+Without clear boundaries, business logic can leak into routes, repositories can contain business rules, and services can become tightly coupled.
+
+## Decision
+
+We will establish a clear layered architecture with defined responsibilities for each layer:
+
+### Layer Responsibilities
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│                        Routes Layer                              │
+│  - Request/response handling                                     │
+│  - Input validation (via middleware)                             │
+│  - Authentication/authorization                                  │
+│  - Rate limiting                                                 │
+│  - Response formatting                                           │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│                       Services Layer                             │
+│  - Business logic orchestration                                  │
+│  - Transaction coordination                                      │
+│  - External API integration                                      │
+│  - Cross-repository operations                                   │
+│  - Event publishing                                              │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│                      Repository Layer                            │
+│  - Direct database access                                        │
+│  - Query construction                                            │
+│  - Entity mapping                                                │
+│  - Error translation                                             │
+└─────────────────────────────────────────────────────────────────┘
+```
+
+### Service Types and Naming
+
+| Type                | Pattern                         | Suffix        | Example               |
+| ------------------- | ------------------------------- | ------------- | --------------------- |
+| Business Service    | Orchestrates business logic     | `*Service.ts` | `authService.ts`      |
+| Server-Only Service | External APIs, server-side only | `*.server.ts` | `aiService.server.ts` |
+| Database Repository | Direct DB access                | `*.db.ts`     | `user.db.ts`          |
+| Infrastructure      | Cross-cutting concerns          | Descriptive   | `logger.server.ts`    |
+
+### Service Dependencies
+
+```
+Routes → Business Services → Repositories
+            ↓
+       External Services
+            ↓
+      Infrastructure (logger, redis, queues)
+```
+
+**Rules**:
+
+- Routes MUST NOT directly access repositories (except simple CRUD)
+- Repositories MUST NOT call other repositories (use services)
+- Services MAY call other services
+- Infrastructure services MAY be called from any layer
+
+## Implementation Details
+
+### Business Service Pattern
+
+```typescript
+// src/services/authService.ts
+import { withTransaction } from './db/connection.db';
+import * as userRepo from './db/user.db';
+import * as profileRepo from './db/personalization.db';
+import { emailService } from './emailService.server';
+import { logger } from './logger.server';
+
+const log = logger.child({ service: 'auth' });
+
+interface LoginResult {
+  user: UserProfile;
+  accessToken: string;
+  refreshToken: string;
+}
+
+export const authService = {
+  /**
+   * Registers a new user and sends welcome email.
+   * Orchestrates multiple repositories in a transaction.
+   */
+  async registerAndLoginUser(
+    email: string,
+    password: string,
+    fullName?: string,
+    avatarUrl?: string,
+    reqLog?: Logger,
+  ): Promise<LoginResult> {
+    const log = reqLog || logger;
+
+    return withTransaction(async (client) => {
+      // 1. Create user (repository)
+      const user = await userRepo.createUser({ email, password }, client);
+
+      // 2. Create profile (repository)
+      await profileRepo.createProfile(
+        {
+          userId: user.user_id,
+          fullName,
+          avatarUrl,
+        },
+        client,
+      );
+
+      // 3. Generate tokens (business logic)
+      const { accessToken, refreshToken } = this.generateTokens(user);
+
+      // 4. Send welcome email (external service, non-blocking)
+      emailService.sendWelcomeEmail(email, fullName).catch((err) => {
+        log.warn({ err, email }, 'Failed to send welcome email');
+      });
+
+      log.info({ userId: user.user_id }, 'User registered successfully');
+
+      return {
+        user: await this.buildUserProfile(user.user_id, client),
+        accessToken,
+        refreshToken,
+      };
+    });
+  },
+
+  // ... other methods
+};
+```
+
+### Server-Only Service Pattern
+
+```typescript
+// src/services/aiService.server.ts
+// This file MUST only be imported by server-side code
+
+import { GenAI } from '@google/genai';
+import { config } from '../config/env';
+import { logger } from './logger.server';
+
+const log = logger.child({ service: 'ai' });
+
+class AiService {
+  private client: GenAI;
+
+  constructor() {
+    this.client = new GenAI({ apiKey: config.ai.geminiApiKey });
+  }
+
+  async analyzeImage(imagePath: string): Promise<AnalysisResult> {
+    log.info({ imagePath }, 'Starting image analysis');
+    // ... implementation
+  }
+}
+
+export const aiService = new AiService();
+```
+
+### Route Handler Pattern
+
+```typescript
+// src/routes/auth.routes.ts
+import { Router } from 'express';
+import { validateRequest } from '../middleware/validation.middleware';
+import { loginLimiter } from '../config/rateLimiters';
+import { authService } from '../services/authService';
+
+const router = Router();
+
+// Route is thin - delegates to service
+router.post(
+  '/register',
+  registerLimiter,
+  validateRequest(registerSchema),
+  async (req, res, next) => {
+    try {
+      const { email, password, full_name } = req.body;
+
+      // Delegate to service
+      const result = await authService.registerAndLoginUser(
+        email,
+        password,
+        full_name,
+        undefined,
+        req.log, // Pass request-scoped logger
+      );
+
+      // Format response
+      res.status(201).json({
+        message: 'Registration successful',
+        user: result.user,
+        accessToken: result.accessToken,
+      });
+    } catch (error) {
+      next(error); // Let error handler deal with it
+    }
+  },
+);
+```
+
+### Service File Organization
+
+```
+src/services/
+├── db/                           # Repository layer
+│   ├── connection.db.ts          # Pool, transactions
+│   ├── errors.db.ts              # DB error types
+│   ├── user.db.ts                # User repository
+│   ├── flyer.db.ts               # Flyer repository
+│   └── index.db.ts               # Barrel exports
+├── authService.ts                # Authentication business logic
+├── userService.ts                # User management business logic
+├── gamificationService.ts        # Gamification business logic
+├── aiService.server.ts           # AI API integration (server-only)
+├── emailService.server.ts        # Email sending (server-only)
+├── geocodingService.server.ts    # Geocoding API (server-only)
+├── cacheService.server.ts        # Redis caching (server-only)
+├── queueService.server.ts        # BullMQ queues (server-only)
+├── logger.server.ts              # Pino logger (server-only)
+└── logger.client.ts              # Client-side logger
+```
+
+### Dependency Injection for Testing
+
+Services should support dependency injection for easier testing:
+
+```typescript
+// Production: use singleton
+export const authService = createAuthService();
+
+// Testing: inject mocks
+export function createAuthService(deps?: Partial<AuthServiceDeps>) {
+  const userRepo = deps?.userRepo || defaultUserRepo;
+  const emailService = deps?.emailService || defaultEmailService;
+
+  return {
+    async registerAndLoginUser(...) { /* ... */ },
+  };
+}
+```
+
+## Key Files
+
+### Infrastructure Services
+
+- `src/services/logger.server.ts` - Server-side structured logging
+- `src/services/logger.client.ts` - Client-side logging
+- `src/services/redis.server.ts` - Redis connection management
+- `src/services/queueService.server.ts` - BullMQ queue management
+- `src/services/cacheService.server.ts` - Caching abstraction
+
+### Business Services
+
+- `src/services/authService.ts` - Authentication flows
+- `src/services/userService.ts` - User management
+- `src/services/gamificationService.ts` - Achievements, leaderboards
+- `src/services/flyerProcessingService.server.ts` - Flyer pipeline
+
+### External Integration Services
+
+- `src/services/aiService.server.ts` - Gemini AI integration
+- `src/services/emailService.server.ts` - Email sending
+- `src/services/geocodingService.server.ts` - Address geocoding
+
+## Consequences
+
+### Positive
+
+- **Separation of Concerns**: Clear boundaries between layers
+- **Testability**: Services can be tested in isolation with mocked dependencies
+- **Reusability**: Business logic in services can be used by multiple routes
+- **Maintainability**: Changes to one layer don't ripple through others
+- **Transaction Safety**: Services coordinate transactions across repositories
+
+### Negative
+
+- **Indirection**: More layers mean more code to navigate
+- **Potential Over-Engineering**: Simple CRUD operations don't need full service layer
+- **Coordination Overhead**: Team must agree on layer boundaries
+
+## Guidelines
+
+### When to Create a Service
+
+Create a business service when:
+
+- Logic spans multiple repositories
+- External APIs need to be called
+- Complex business rules exist
+- The same logic is needed by multiple routes
+- Transaction coordination is required
+
+### When Direct Repository Access is OK
+
+Routes can directly use repositories for:
+
+- Simple single-entity CRUD operations
+- Read-only queries with no business logic
+- Operations that don't need transaction coordination
+
+### Service Method Guidelines
+
+- Accept a request-scoped logger as an optional parameter
+- Return domain objects, not HTTP-specific responses
+- Throw domain errors, let routes handle HTTP status codes
+- Use `withTransaction` for multi-repository operations
+- Log business events (user registered, order placed, etc.)

docs/adr/0036-event-bus-and-pub-sub-pattern.md

@@ -0,0 +1,212 @@
+# ADR-036: Event Bus and Pub/Sub Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+Modern web applications often need to handle cross-component communication without creating tight coupling between modules. In our application, several scenarios require broadcasting events across the system:
+
+1. **Session Expiry**: When a user's session expires, multiple components need to respond (auth state, UI notifications, API client).
+2. **Real-time Updates**: When data changes on the server, multiple UI components may need to update.
+3. **Cross-Component Communication**: Independent components need to communicate without direct references to each other.
+
+Traditional approaches like prop drilling or global state management can lead to tightly coupled code that is difficult to maintain and test.
+
+## Decision
+
+We will implement a lightweight, in-memory event bus pattern using a publish/subscribe (pub/sub) architecture. This provides:
+
+1. **Decoupled Communication**: Publishers and subscribers don't need to know about each other.
+2. **Event-Driven Architecture**: Components react to events rather than polling for changes.
+3. **Testability**: Events can be easily mocked and verified in tests.
+
+### Design Principles
+
+- **Singleton Pattern**: A single event bus instance is shared across the application.
+- **Type-Safe Events**: Event names are string constants to prevent typos.
+- **Memory Management**: Subscribers must unsubscribe when components unmount to prevent memory leaks.
+
+## Implementation Details
+
+### EventBus Class
+
+Located in `src/services/eventBus.ts`:
+
+```typescript
+type EventCallback = (data?: any) => void;
+
+export class EventBus {
+  private listeners: { [key: string]: EventCallback[] } = {};
+
+  on(event: string, callback: EventCallback): void {
+    if (!this.listeners[event]) {
+      this.listeners[event] = [];
+    }
+    this.listeners[event].push(callback);
+  }
+
+  off(event: string, callback: EventCallback): void {
+    if (!this.listeners[event]) return;
+    this.listeners[event] = this.listeners[event].filter((l) => l !== callback);
+  }
+
+  dispatch(event: string, data?: any): void {
+    if (!this.listeners[event]) return;
+    this.listeners[event].forEach((callback) => callback(data));
+  }
+}
+
+// Singleton instance
+export const eventBus = new EventBus();
+```
+
+### Event Constants
+
+Define event names as constants to prevent typos:
+
+```typescript
+// src/constants/events.ts
+export const EVENTS = {
+  SESSION_EXPIRED: 'session:expired',
+  SESSION_REFRESHED: 'session:refreshed',
+  USER_LOGGED_OUT: 'user:loggedOut',
+  DATA_UPDATED: 'data:updated',
+  NOTIFICATION_RECEIVED: 'notification:received',
+} as const;
+```
+
+### React Hook for Event Subscription
+
+```typescript
+// src/hooks/useEventBus.ts
+import { useEffect } from 'react';
+import { eventBus } from '../services/eventBus';
+
+export function useEventBus(event: string, callback: (data?: any) => void) {
+  useEffect(() => {
+    eventBus.on(event, callback);
+
+    // Cleanup on unmount
+    return () => {
+      eventBus.off(event, callback);
+    };
+  }, [event, callback]);
+}
+```
+
+### Usage Examples
+
+**Publishing Events**:
+
+```typescript
+import { eventBus } from '../services/eventBus';
+import { EVENTS } from '../constants/events';
+
+// In API client when session expires
+function handleSessionExpiry() {
+  eventBus.dispatch(EVENTS.SESSION_EXPIRED, { reason: 'token_expired' });
+}
+```
+
+**Subscribing in Components**:
+
+```typescript
+import { useCallback } from 'react';
+import { useEventBus } from '../hooks/useEventBus';
+import { EVENTS } from '../constants/events';
+
+function AuthenticatedComponent() {
+  const handleSessionExpired = useCallback((data) => {
+    console.log('Session expired:', data.reason);
+    // Redirect to login, show notification, etc.
+  }, []);
+
+  useEventBus(EVENTS.SESSION_EXPIRED, handleSessionExpired);
+
+  return <div>Protected Content</div>;
+}
+```
+
+**Subscribing in Non-React Code**:
+
+```typescript
+import { eventBus } from '../services/eventBus';
+import { EVENTS } from '../constants/events';
+
+// In API client
+const handleLogout = () => {
+  clearAuthToken();
+};
+
+eventBus.on(EVENTS.USER_LOGGED_OUT, handleLogout);
+```
+
+### Testing
+
+The EventBus is fully tested in `src/services/eventBus.test.ts`:
+
+```typescript
+import { EventBus } from './eventBus';
+
+describe('EventBus', () => {
+  let bus: EventBus;
+
+  beforeEach(() => {
+    bus = new EventBus();
+  });
+
+  it('should call registered listeners when event is dispatched', () => {
+    const callback = vi.fn();
+    bus.on('test', callback);
+    bus.dispatch('test', { value: 42 });
+    expect(callback).toHaveBeenCalledWith({ value: 42 });
+  });
+
+  it('should unsubscribe listeners correctly', () => {
+    const callback = vi.fn();
+    bus.on('test', callback);
+    bus.off('test', callback);
+    bus.dispatch('test');
+    expect(callback).not.toHaveBeenCalled();
+  });
+
+  it('should handle multiple listeners for the same event', () => {
+    const callback1 = vi.fn();
+    const callback2 = vi.fn();
+    bus.on('test', callback1);
+    bus.on('test', callback2);
+    bus.dispatch('test');
+    expect(callback1).toHaveBeenCalled();
+    expect(callback2).toHaveBeenCalled();
+  });
+});
+```
+
+## Consequences
+
+### Positive
+
+- **Loose Coupling**: Components don't need direct references to communicate.
+- **Flexibility**: New subscribers can be added without modifying publishers.
+- **Testability**: Easy to mock events and verify interactions.
+- **Simplicity**: Minimal code footprint compared to full state management solutions.
+
+### Negative
+
+- **Debugging Complexity**: Event-driven flows can be harder to trace than direct function calls.
+- **Memory Leaks**: Forgetting to unsubscribe can cause memory leaks (mitigated by the React hook).
+- **No Type Safety for Payloads**: Event data is typed as `any` (could be improved with generics).
+
+## Key Files
+
+- `src/services/eventBus.ts` - EventBus implementation
+- `src/services/eventBus.test.ts` - EventBus tests
+
+## Related ADRs
+
+- [ADR-005](./0005-frontend-state-management-and-server-cache-strategy.md) - State Management Strategy
+- [ADR-022](./0022-real-time-notification-system.md) - Real-time Notification System

docs/adr/0037-scheduled-jobs-and-cron-pattern.md

@@ -0,0 +1,265 @@
+# ADR-037: Scheduled Jobs and Cron Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+Many business operations need to run on a recurring schedule without user intervention:
+
+1. **Daily Deal Checks**: Scan watched items for price drops and notify users.
+2. **Analytics Generation**: Compile daily and weekly statistics reports.
+3. **Token Cleanup**: Remove expired password reset tokens from the database.
+4. **Data Maintenance**: Archive old data, clean up temporary files.
+
+These scheduled operations require:
+
+- Reliable execution at specific times
+- Protection against overlapping runs
+- Graceful error handling that doesn't crash the server
+- Integration with the existing job queue system (BullMQ)
+
+## Decision
+
+We will use `node-cron` for scheduling jobs and integrate with BullMQ for job execution. This provides:
+
+1. **Cron Expressions**: Standard, well-understood scheduling syntax.
+2. **Job Queue Integration**: Scheduled jobs enqueue work to BullMQ for reliable processing.
+3. **Idempotency**: Jobs use predictable IDs to prevent duplicate runs.
+4. **Overlap Protection**: In-memory locks prevent concurrent execution of the same job.
+
+### Architecture
+
+```text
+┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
+│   node-cron     │────▶│   BullMQ Queue  │────▶│   Worker        │
+│   (Scheduler)   │     │   (Job Store)   │     │   (Processor)   │
+└─────────────────┘     └─────────────────┘     └─────────────────┘
+                              │
+                              ▼
+                        ┌─────────────────┐
+                        │   Redis         │
+                        │   (Persistence) │
+                        └─────────────────┘
+```
+
+## Implementation Details
+
+### BackgroundJobService
+
+Located in `src/services/backgroundJobService.ts`:
+
+```typescript
+import cron from 'node-cron';
+import type { Logger } from 'pino';
+import type { Queue } from 'bullmq';
+
+export class BackgroundJobService {
+  constructor(
+    private personalizationRepo: PersonalizationRepository,
+    private notificationRepo: NotificationRepository,
+    private emailQueue: Queue<EmailJobData>,
+    private logger: Logger,
+  ) {}
+
+  async runDailyDealCheck(): Promise<void> {
+    this.logger.info('[BackgroundJob] Starting daily deal check...');
+
+    // 1. Fetch all deals for all users in one efficient query
+    const allDeals = await this.personalizationRepo.getBestSalePricesForAllUsers(this.logger);
+
+    // 2. Group deals by user
+    const dealsByUser = this.groupDealsByUser(allDeals);
+
+    // 3. Process each user's deals in parallel
+    const results = await Promise.allSettled(
+      Array.from(dealsByUser.values()).map((userGroup) => this._processDealsForUser(userGroup)),
+    );
+
+    // 4. Bulk insert notifications
+    await this.bulkCreateNotifications(results);
+
+    this.logger.info('[BackgroundJob] Daily deal check completed.');
+  }
+
+  async triggerAnalyticsReport(): Promise<string> {
+    const reportDate = getCurrentDateISOString();
+    const jobId = `manual-report-${reportDate}-${Date.now()}`;
+    const job = await analyticsQueue.add('generate-daily-report', { reportDate }, { jobId });
+    return job.id;
+  }
+}
+```
+
+### Cron Job Initialization
+
+```typescript
+// In-memory lock to prevent job overlap
+let isDailyDealCheckRunning = false;
+
+export function startBackgroundJobs(
+  backgroundJobService: BackgroundJobService,
+  analyticsQueue: Queue,
+  weeklyAnalyticsQueue: Queue,
+  tokenCleanupQueue: Queue,
+  logger: Logger,
+): void {
+  // Daily deal check at 2:00 AM
+  cron.schedule('0 2 * * *', () => {
+    (async () => {
+      if (isDailyDealCheckRunning) {
+        logger.warn('[BackgroundJob] Daily deal check already running. Skipping.');
+        return;
+      }
+      isDailyDealCheckRunning = true;
+      try {
+        await backgroundJobService.runDailyDealCheck();
+      } catch (error) {
+        logger.error({ err: error }, '[BackgroundJob] Daily deal check failed.');
+      } finally {
+        isDailyDealCheckRunning = false;
+      }
+    })().catch((error) => {
+      logger.error({ err: error }, '[BackgroundJob] Unhandled rejection in cron wrapper.');
+      isDailyDealCheckRunning = false;
+    });
+  });
+
+  // Daily analytics at 3:00 AM
+  cron.schedule('0 3 * * *', () => {
+    (async () => {
+      const reportDate = getCurrentDateISOString();
+      await analyticsQueue.add(
+        'generate-daily-report',
+        { reportDate },
+        { jobId: `daily-report-${reportDate}` }, // Prevents duplicates
+      );
+    })().catch((error) => {
+      logger.error({ err: error }, '[BackgroundJob] Analytics job enqueue failed.');
+    });
+  });
+
+  // Weekly analytics at 4:00 AM on Sundays
+  cron.schedule('0 4 * * 0', () => {
+    (async () => {
+      const { year, week } = getSimpleWeekAndYear();
+      await weeklyAnalyticsQueue.add(
+        'generate-weekly-report',
+        { reportYear: year, reportWeek: week },
+        { jobId: `weekly-report-${year}-${week}` },
+      );
+    })().catch((error) => {
+      logger.error({ err: error }, '[BackgroundJob] Weekly analytics enqueue failed.');
+    });
+  });
+
+  // Token cleanup at 5:00 AM
+  cron.schedule('0 5 * * *', () => {
+    (async () => {
+      const timestamp = new Date().toISOString();
+      await tokenCleanupQueue.add(
+        'cleanup-tokens',
+        { timestamp },
+        { jobId: `token-cleanup-${timestamp.split('T')[0]}` },
+      );
+    })().catch((error) => {
+      logger.error({ err: error }, '[BackgroundJob] Token cleanup enqueue failed.');
+    });
+  });
+
+  logger.info('[BackgroundJob] All cron jobs scheduled successfully.');
+}
+```
+
+### Job Schedule Reference
+
+| Job              | Schedule                     | Queue                  | Purpose                           |
+| ---------------- | ---------------------------- | ---------------------- | --------------------------------- |
+| Daily Deal Check | `0 2 * * *` (2:00 AM)        | Direct execution       | Find price drops on watched items |
+| Daily Analytics  | `0 3 * * *` (3:00 AM)        | `analyticsQueue`       | Generate daily statistics         |
+| Weekly Analytics | `0 4 * * 0` (4:00 AM Sunday) | `weeklyAnalyticsQueue` | Generate weekly reports           |
+| Token Cleanup    | `0 5 * * *` (5:00 AM)        | `tokenCleanupQueue`    | Remove expired tokens             |
+
+### Cron Expression Reference
+
+```text
+┌───────────── minute (0 - 59)
+│ ┌───────────── hour (0 - 23)
+│ │ ┌───────────── day of month (1 - 31)
+│ │ │ ┌───────────── month (1 - 12)
+│ │ │ │ ┌───────────── day of week (0 - 7, Sun = 0 or 7)
+│ │ │ │ │
+* * * * *
+
+Examples:
+0 2 * * *     = 2:00 AM every day
+0 4 * * 0     = 4:00 AM every Sunday
+*/15 * * * *  = Every 15 minutes
+0 0 1 * *     = Midnight on the 1st of each month
+```
+
+### Error Handling Pattern
+
+The async IIFE wrapper with `.catch()` ensures that:
+
+1. Errors in the job don't crash the cron scheduler
+2. Unhandled promise rejections are logged
+3. The lock is always released in the `finally` block
+
+```typescript
+cron.schedule('0 2 * * *', () => {
+  (async () => {
+    // Job logic here
+  })().catch((error) => {
+    // Handle unhandled rejections from the async wrapper
+    logger.error({ err: error }, 'Unhandled rejection');
+  });
+});
+```
+
+### Manual Trigger API
+
+Admin endpoints allow manual triggering of scheduled jobs:
+
+```typescript
+// src/routes/admin.routes.ts
+router.post('/jobs/daily-deals', isAdmin, async (req, res, next) => {
+  await backgroundJobService.runDailyDealCheck();
+  res.json({ message: 'Daily deal check triggered' });
+});
+
+router.post('/jobs/analytics', isAdmin, async (req, res, next) => {
+  const jobId = await backgroundJobService.triggerAnalyticsReport();
+  res.json({ message: 'Analytics report queued', jobId });
+});
+```
+
+## Consequences
+
+### Positive
+
+- **Reliability**: Jobs run at predictable times without manual intervention.
+- **Idempotency**: Duplicate job prevention via job IDs.
+- **Observability**: All job activity is logged with structured logging.
+- **Flexibility**: Jobs can be triggered manually for testing or urgent runs.
+- **Separation**: Scheduling is decoupled from job execution (cron vs BullMQ).
+
+### Negative
+
+- **Single Server**: Cron runs on a single server instance. For multi-server deployments, consider distributed scheduling.
+- **Time Zone Dependency**: Cron times are server-local; consider UTC for distributed systems.
+- **In-Memory Locks**: Overlap protection is per-process, not cluster-wide.
+
+## Key Files
+
+- `src/services/backgroundJobService.ts` - BackgroundJobService class and `startBackgroundJobs`
+- `src/services/queueService.server.ts` - BullMQ queue definitions
+- `src/services/workers.server.ts` - BullMQ worker processors
+
+## Related ADRs
+
+- [ADR-006](./0006-background-job-processing-and-task-queues.md) - Background Job Processing
+- [ADR-004](./0004-standardized-application-wide-structured-logging.md) - Structured Logging

docs/adr/0038-graceful-shutdown-pattern.md

@@ -0,0 +1,290 @@
+# ADR-038: Graceful Shutdown Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+When deploying or restarting the application, abrupt termination can cause:
+
+1. **Lost Jobs**: BullMQ jobs in progress may be marked as failed or stalled.
+2. **Connection Leaks**: Database and Redis connections may not be properly closed.
+3. **Incomplete Requests**: HTTP requests in flight may receive no response.
+4. **Data Corruption**: Transactions may be left in an inconsistent state.
+
+Kubernetes and PM2 send termination signals (SIGTERM, SIGINT) to processes before forcefully killing them. The application must handle these signals to shut down gracefully.
+
+## Decision
+
+We will implement a coordinated graceful shutdown pattern that:
+
+1. **Stops Accepting New Work**: Closes HTTP server, pauses job queues.
+2. **Completes In-Flight Work**: Waits for active requests and jobs to finish.
+3. **Releases Resources**: Closes database pools, Redis connections, and queues.
+4. **Logs Shutdown Progress**: Provides visibility into the shutdown process.
+
+### Signal Handling
+
+| Signal  | Source             | Behavior                                |
+| ------- | ------------------ | --------------------------------------- |
+| SIGTERM | Kubernetes, PM2    | Graceful shutdown with resource cleanup |
+| SIGINT  | Ctrl+C in terminal | Same as SIGTERM                         |
+| SIGKILL | Force kill         | Cannot be caught; immediate termination |
+
+## Implementation Details
+
+### Queue and Worker Shutdown
+
+Located in `src/services/queueService.server.ts`:
+
+```typescript
+import { logger } from './logger.server';
+
+export const gracefulShutdown = async (signal: string): Promise<void> => {
+  logger.info(`[Shutdown] Received ${signal}. Closing all queues and workers...`);
+
+  const resources = [
+    { name: 'flyerQueue', close: () => flyerQueue.close() },
+    { name: 'emailQueue', close: () => emailQueue.close() },
+    { name: 'analyticsQueue', close: () => analyticsQueue.close() },
+    { name: 'weeklyAnalyticsQueue', close: () => weeklyAnalyticsQueue.close() },
+    { name: 'cleanupQueue', close: () => cleanupQueue.close() },
+    { name: 'tokenCleanupQueue', close: () => tokenCleanupQueue.close() },
+    { name: 'redisConnection', close: () => connection.quit() },
+  ];
+
+  const results = await Promise.allSettled(
+    resources.map(async (resource) => {
+      try {
+        await resource.close();
+        logger.info(`[Shutdown] ${resource.name} closed successfully.`);
+      } catch (error) {
+        logger.error({ err: error }, `[Shutdown] Error closing ${resource.name}`);
+        throw error;
+      }
+    }),
+  );
+
+  const failures = results.filter((r) => r.status === 'rejected');
+  if (failures.length > 0) {
+    logger.error(`[Shutdown] ${failures.length} resources failed to close.`);
+  }
+
+  logger.info('[Shutdown] All resources closed. Process can now exit.');
+};
+
+// Register signal handlers
+process.on('SIGTERM', () => gracefulShutdown('SIGTERM'));
+process.on('SIGINT', () => gracefulShutdown('SIGINT'));
+```
+
+### HTTP Server Shutdown
+
+Located in `server.ts`:
+
+```typescript
+import { gracefulShutdown as shutdownQueues } from './src/services/queueService.server';
+import { closePool } from './src/services/db/connection.db';
+
+const server = app.listen(PORT, () => {
+  logger.info(`Server listening on port ${PORT}`);
+});
+
+const gracefulShutdown = async (signal: string): Promise<void> => {
+  logger.info(`[Shutdown] Received ${signal}. Starting graceful shutdown...`);
+
+  // 1. Stop accepting new connections
+  server.close((err) => {
+    if (err) {
+      logger.error({ err }, '[Shutdown] Error closing HTTP server');
+    } else {
+      logger.info('[Shutdown] HTTP server closed.');
+    }
+  });
+
+  // 2. Wait for in-flight requests (with timeout)
+  await new Promise((resolve) => setTimeout(resolve, 5000));
+
+  // 3. Close queues and workers
+  await shutdownQueues(signal);
+
+  // 4. Close database pool
+  await closePool();
+  logger.info('[Shutdown] Database pool closed.');
+
+  // 5. Exit process
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => gracefulShutdown('SIGTERM'));
+process.on('SIGINT', () => gracefulShutdown('SIGINT'));
+```
+
+### Database Pool Shutdown
+
+Located in `src/services/db/connection.db.ts`:
+
+```typescript
+let pool: Pool | null = null;
+
+export function getPool(): Pool {
+  if (!pool) {
+    pool = new Pool({
+      max: 20,
+      idleTimeoutMillis: 30000,
+      connectionTimeoutMillis: 2000,
+    });
+  }
+  return pool;
+}
+
+export async function closePool(): Promise<void> {
+  if (pool) {
+    await pool.end();
+    pool = null;
+    logger.info('[Database] Connection pool closed.');
+  }
+}
+
+export function getPoolStatus(): { totalCount: number; idleCount: number; waitingCount: number } {
+  const p = getPool();
+  return {
+    totalCount: p.totalCount,
+    idleCount: p.idleCount,
+    waitingCount: p.waitingCount,
+  };
+}
+```
+
+### PM2 Ecosystem Configuration
+
+Located in `ecosystem.config.cjs`:
+
+```javascript
+module.exports = {
+  apps: [
+    {
+      name: 'flyer-crawler-api',
+      script: 'server.ts',
+      interpreter: 'tsx',
+
+      // Graceful shutdown settings
+      kill_timeout: 10000, // 10 seconds to cleanup before SIGKILL
+      wait_ready: true, // Wait for 'ready' signal before considering app started
+      listen_timeout: 10000, // Timeout for ready signal
+
+      // Cluster mode for zero-downtime reloads
+      instances: 1,
+      exec_mode: 'fork',
+
+      // Environment variables
+      env_production: {
+        NODE_ENV: 'production',
+        PORT: 3000,
+      },
+      env_test: {
+        NODE_ENV: 'test',
+        PORT: 3001,
+      },
+    },
+  ],
+};
+```
+
+### Worker Graceful Shutdown
+
+BullMQ workers can be configured to wait for active jobs:
+
+```typescript
+import { Worker } from 'bullmq';
+
+const worker = new Worker('flyerQueue', processor, {
+  connection,
+  // Graceful shutdown: wait for active jobs before closing
+  settings: {
+    lockDuration: 30000, // Time before job is considered stalled
+    stalledInterval: 5000, // Check for stalled jobs every 5s
+  },
+});
+
+// Workers auto-close when connection closes
+worker.on('closing', () => {
+  logger.info('[Worker] flyerQueue worker is closing...');
+});
+
+worker.on('closed', () => {
+  logger.info('[Worker] flyerQueue worker closed.');
+});
+```
+
+### Shutdown Sequence Diagram
+
+```text
+SIGTERM Received
+       │
+       ▼
+┌──────────────────────┐
+│ Stop HTTP Server     │  ← No new connections accepted
+│ (server.close())     │
+└──────────────────────┘
+       │
+       ▼
+┌──────────────────────┐
+│ Wait for In-Flight   │  ← 5-second grace period
+│ Requests             │
+└──────────────────────┘
+       │
+       ▼
+┌──────────────────────┐
+│ Close BullMQ Queues  │  ← Stop processing new jobs
+│ and Workers          │
+└──────────────────────┘
+       │
+       ▼
+┌──────────────────────┐
+│ Close Redis          │  ← Disconnect from Redis
+│ Connection           │
+└──────────────────────┘
+       │
+       ▼
+┌──────────────────────┐
+│ Close Database Pool  │  ← Release all DB connections
+│ (pool.end())         │
+└──────────────────────┘
+       │
+       ▼
+┌──────────────────────┐
+│ process.exit(0)      │  ← Clean exit
+└──────────────────────┘
+```
+
+## Consequences
+
+### Positive
+
+- **Zero Lost Work**: In-flight requests and jobs complete before shutdown.
+- **Clean Resource Cleanup**: All connections are properly closed.
+- **Zero-Downtime Deploys**: PM2 can reload without dropping requests.
+- **Observability**: Shutdown progress is logged for debugging.
+
+### Negative
+
+- **Shutdown Delay**: Takes 5-15 seconds to fully shutdown.
+- **Complexity**: Multiple shutdown handlers must be coordinated.
+- **Edge Cases**: Very long-running jobs may be killed if they exceed the grace period.
+
+## Key Files
+
+- `server.ts` - HTTP server shutdown and signal handling
+- `src/services/queueService.server.ts` - Queue shutdown (`gracefulShutdown`)
+- `src/services/db/connection.db.ts` - Database pool shutdown (`closePool`)
+- `ecosystem.config.cjs` - PM2 configuration with `kill_timeout`
+
+## Related ADRs
+
+- [ADR-006](./0006-background-job-processing-and-task-queues.md) - Background Job Processing
+- [ADR-020](./0020-health-checks-and-liveness-readiness-probes.md) - Health Checks
+- [ADR-014](./0014-containerization-and-deployment-strategy.md) - Containerization

docs/adr/0039-dependency-injection-pattern.md

@@ -0,0 +1,278 @@
+# ADR-039: Dependency Injection Pattern
+
+**Date**: 2026-01-09
+
+**Status**: Accepted
+
+**Implemented**: 2026-01-09
+
+## Context
+
+As the application grows, tightly coupled components become difficult to test and maintain. Common issues include:
+
+1. **Hard-to-Test Code**: Components that instantiate their own dependencies cannot be easily unit tested with mocks.
+2. **Rigid Architecture**: Changing one implementation requires modifying all consumers.
+3. **Hidden Dependencies**: It's unclear what a component needs to function.
+4. **Circular Dependencies**: Tight coupling can lead to circular import issues.
+
+Dependency Injection (DI) addresses these issues by inverting the control of dependency creation.
+
+## Decision
+
+We will adopt a constructor-based dependency injection pattern for all services and repositories. This approach:
+
+1. **Explicit Dependencies**: All dependencies are declared in the constructor.
+2. **Default Values**: Production dependencies have sensible defaults.
+3. **Testability**: Test code can inject mocks without modifying source code.
+4. **Loose Coupling**: Components depend on interfaces, not implementations.
+
+### Design Principles
+
+- **Constructor Injection**: Dependencies are passed through constructors, not looked up globally.
+- **Default Production Dependencies**: Use default parameter values for production instances.
+- **Interface Segregation**: Depend on the minimal interface needed (e.g., `Pick<Pool, 'query'>`).
+- **Composition Root**: Wire dependencies at the application entry point.
+
+## Implementation Details
+
+### Repository Pattern with DI
+
+Located in `src/services/db/flyer.db.ts`:
+
+```typescript
+import { Pool, PoolClient } from 'pg';
+import { getPool } from './connection.db';
+
+export class FlyerRepository {
+  // Accept any object with a 'query' method - Pool or PoolClient
+  private db: Pick<Pool | PoolClient, 'query'>;
+
+  constructor(db: Pick<Pool | PoolClient, 'query'> = getPool()) {
+    this.db = db;
+  }
+
+  async getFlyerById(flyerId: number, logger: Logger): Promise<Flyer> {
+    const result = await this.db.query<Flyer>('SELECT * FROM flyers WHERE flyer_id = $1', [
+      flyerId,
+    ]);
+    if (result.rows.length === 0) {
+      throw new NotFoundError(`Flyer with ID ${flyerId} not found.`);
+    }
+    return result.rows[0];
+  }
+
+  async insertFlyer(flyer: FlyerDbInsert, logger: Logger): Promise<Flyer> {
+    // Implementation
+  }
+}
+```
+
+**Usage in Production**:
+
+```typescript
+// Uses default pool
+const flyerRepo = new FlyerRepository();
+```
+
+**Usage in Tests**:
+
+```typescript
+const mockDb = {
+  query: vi.fn().mockResolvedValue({ rows: [mockFlyer] }),
+};
+const flyerRepo = new FlyerRepository(mockDb);
+```
+
+**Usage in Transactions**:
+
+```typescript
+import { withTransaction } from './connection.db';
+
+await withTransaction(async (client) => {
+  // Pass transactional client to repository
+  const flyerRepo = new FlyerRepository(client);
+  const flyer = await flyerRepo.insertFlyer(flyerData, logger);
+  // ... more operations in the same transaction
+});
+```
+
+### Service Layer with DI
+
+Located in `src/services/backgroundJobService.ts`:
+
+```typescript
+export class BackgroundJobService {
+  constructor(
+    private personalizationRepo: PersonalizationRepository,
+    private notificationRepo: NotificationRepository,
+    private emailQueue: Queue<EmailJobData>,
+    private logger: Logger,
+  ) {}
+
+  async runDailyDealCheck(): Promise<void> {
+    this.logger.info('[BackgroundJob] Starting daily deal check...');
+
+    const deals = await this.personalizationRepo.getBestSalePricesForAllUsers(this.logger);
+    // ... process deals
+  }
+}
+
+// Composition root - wire production dependencies
+import { personalizationRepo, notificationRepo } from './db/index.db';
+import { logger } from './logger.server';
+import { emailQueue } from './queueService.server';
+
+export const backgroundJobService = new BackgroundJobService(
+  personalizationRepo,
+  notificationRepo,
+  emailQueue,
+  logger,
+);
+```
+
+**Testing with Mocks**:
+
+```typescript
+describe('BackgroundJobService', () => {
+  it('should process deals for all users', async () => {
+    const mockPersonalizationRepo = {
+      getBestSalePricesForAllUsers: vi.fn().mockResolvedValue([mockDeal]),
+    };
+    const mockNotificationRepo = {
+      createBulkNotifications: vi.fn().mockResolvedValue([]),
+    };
+    const mockEmailQueue = {
+      add: vi.fn().mockResolvedValue({ id: 'job-1' }),
+    };
+    const mockLogger = {
+      info: vi.fn(),
+      error: vi.fn(),
+    };
+
+    const service = new BackgroundJobService(
+      mockPersonalizationRepo as any,
+      mockNotificationRepo as any,
+      mockEmailQueue as any,
+      mockLogger as any,
+    );
+
+    await service.runDailyDealCheck();
+
+    expect(mockPersonalizationRepo.getBestSalePricesForAllUsers).toHaveBeenCalled();
+    expect(mockEmailQueue.add).toHaveBeenCalled();
+  });
+});
+```
+
+### Processing Service with DI
+
+Located in `src/services/flyer/flyerProcessingService.ts`:
+
+```typescript
+export class FlyerProcessingService {
+  constructor(
+    private fileHandler: FlyerFileHandler,
+    private aiProcessor: FlyerAiProcessor,
+    private fsAdapter: FileSystemAdapter,
+    private cleanupQueue: Queue<CleanupJobData>,
+    private dataTransformer: FlyerDataTransformer,
+    private persistenceService: FlyerPersistenceService,
+  ) {}
+
+  async processFlyer(filePath: string, logger: Logger): Promise<ProcessedFlyer> {
+    // Use injected dependencies
+    const fileInfo = await this.fileHandler.extractMetadata(filePath);
+    const aiResult = await this.aiProcessor.analyze(filePath, logger);
+    const transformed = this.dataTransformer.transform(aiResult);
+    const saved = await this.persistenceService.save(transformed, logger);
+
+    // Queue cleanup
+    await this.cleanupQueue.add('cleanup', { filePath });
+
+    return saved;
+  }
+}
+
+// Composition root
+const flyerProcessingService = new FlyerProcessingService(
+  new FlyerFileHandler(fsAdapter, execAsync),
+  new FlyerAiProcessor(aiService, db.personalizationRepo),
+  fsAdapter,
+  cleanupQueue,
+  new FlyerDataTransformer(),
+  new FlyerPersistenceService(),
+);
+```
+
+### Interface Segregation
+
+Use the minimum interface required:
+
+```typescript
+// Bad - depends on full Pool
+constructor(pool: Pool) {}
+
+// Good - depends only on what's needed
+constructor(db: Pick<Pool | PoolClient, 'query'>) {}
+```
+
+This allows injecting either a `Pool`, `PoolClient` (for transactions), or a mock object with just a `query` method.
+
+### Composition Root Pattern
+
+Wire all dependencies at application startup:
+
+```typescript
+// src/services/db/index.db.ts - Composition root for repositories
+import { getPool } from './connection.db';
+
+export const userRepo = new UserRepository(getPool());
+export const flyerRepo = new FlyerRepository(getPool());
+export const adminRepo = new AdminRepository(getPool());
+export const personalizationRepo = new PersonalizationRepository(getPool());
+export const notificationRepo = new NotificationRepository(getPool());
+
+export const db = {
+  userRepo,
+  flyerRepo,
+  adminRepo,
+  personalizationRepo,
+  notificationRepo,
+};
+```
+
+## Consequences
+
+### Positive
+
+- **Testability**: Unit tests can inject mocks without modifying production code.
+- **Flexibility**: Swap implementations (e.g., different database adapters) easily.
+- **Explicit Dependencies**: Clear contract of what a component needs.
+- **Transaction Support**: Repositories can participate in transactions by accepting a client.
+
+### Negative
+
+- **More Boilerplate**: Constructors become longer with many dependencies.
+- **Composition Complexity**: Must wire dependencies somewhere (composition root).
+- **No Runtime Type Checking**: TypeScript types are erased at runtime.
+
+### Mitigation
+
+For complex services with many dependencies, consider:
+
+1. **Factory Functions**: Encapsulate construction logic.
+2. **Dependency Groups**: Pass related dependencies as a single object.
+3. **DI Containers**: For very large applications, consider a DI library like `tsyringe` or `inversify`.
+
+## Key Files
+
+- `src/services/db/*.db.ts` - Repository classes with constructor DI
+- `src/services/db/index.db.ts` - Composition root for repositories
+- `src/services/backgroundJobService.ts` - Service class with constructor DI
+- `src/services/flyer/flyerProcessingService.ts` - Complex service with multiple dependencies
+
+## Related ADRs
+
+- [ADR-002](./0002-standardized-transaction-management.md) - Transaction Management
+- [ADR-034](./0034-repository-pattern-standards.md) - Repository Pattern Standards
+- [ADR-035](./0035-service-layer-architecture.md) - Service Layer Architecture

docs/adr/adr-implementation-tracker.md

@@ -0,0 +1,145 @@
+# ADR Implementation Tracker
+
+This document tracks the implementation status and estimated effort for all Architectural Decision Records (ADRs).
+
+## Effort Estimation Guide
+
+| Rating | Description                                 | Typical Duration  |
+| ------ | ------------------------------------------- | ----------------- |
+| S      | Small - Simple, isolated changes            | 1-2 hours         |
+| M      | Medium - Multiple files, some testing       | Half day to 1 day |
+| L      | Large - Significant refactoring, many files | 1-3 days          |
+| XL     | Extra Large - Major architectural change    | 1+ weeks          |
+
+## Implementation Status Overview
+
+| Status                       | Count |
+| ---------------------------- | ----- |
+| Accepted (Fully Implemented) | 22    |
+| Partially Implemented        | 2     |
+| Proposed (Not Started)       | 15    |
+
+---
+
+## Detailed Implementation Status
+
+### Category 1: Foundational / Core Infrastructure
+
+| ADR                                                              | Title                   | Status   | Effort | Notes                          |
+| ---------------------------------------------------------------- | ----------------------- | -------- | ------ | ------------------------------ |
+| [ADR-002](./0002-standardized-transaction-management.md)         | Transaction Management  | Accepted | -      | Fully implemented              |
+| [ADR-007](./0007-configuration-and-secrets-management.md)        | Configuration & Secrets | Accepted | -      | Fully implemented              |
+| [ADR-020](./0020-health-checks-and-liveness-readiness-probes.md) | Health Checks           | Accepted | -      | Fully implemented              |
+| [ADR-030](./0030-graceful-degradation-and-circuit-breaker.md)    | Circuit Breaker         | Proposed | L      | New resilience patterns needed |
+
+### Category 2: Data Management
+
+| ADR                                                             | Title                    | Status   | Effort | Notes                          |
+| --------------------------------------------------------------- | ------------------------ | -------- | ------ | ------------------------------ |
+| [ADR-009](./0009-caching-strategy-for-read-heavy-operations.md) | Caching Strategy         | Accepted | -      | Fully implemented              |
+| [ADR-013](./0013-database-schema-migration-strategy.md)         | Schema Migrations v1     | Proposed | M      | Superseded by ADR-023          |
+| [ADR-019](./0019-data-backup-and-recovery-strategy.md)          | Backup & Recovery        | Accepted | -      | Fully implemented              |
+| [ADR-023](./0023-database-schema-migration-strategy.md)         | Schema Migrations v2     | Proposed | L      | Requires tooling setup         |
+| [ADR-031](./0031-data-retention-and-privacy-compliance.md)      | Data Retention & Privacy | Proposed | XL     | Legal/compliance review needed |
+
+### Category 3: API & Integration
+
+| ADR                                                                 | Title                    | Status      | Effort | Notes                                 |
+| ------------------------------------------------------------------- | ------------------------ | ----------- | ------ | ------------------------------------- |
+| [ADR-003](./0003-standardized-input-validation-using-middleware.md) | Input Validation         | Accepted    | -      | Fully implemented                     |
+| [ADR-008](./0008-api-versioning-strategy.md)                        | API Versioning           | Proposed    | L      | Major URL/routing changes             |
+| [ADR-018](./0018-api-documentation-strategy.md)                     | API Documentation        | Proposed    | M      | OpenAPI/Swagger setup                 |
+| [ADR-022](./0022-real-time-notification-system.md)                  | Real-time Notifications  | Proposed    | XL     | WebSocket infrastructure              |
+| [ADR-028](./0028-api-response-standardization.md)                   | Response Standardization | Implemented | L      | Completed (routes, middleware, tests) |
+
+### Category 4: Security & Compliance
+
+| ADR                                                                     | Title                 | Status   | Effort | Notes                            |
+| ----------------------------------------------------------------------- | --------------------- | -------- | ------ | -------------------------------- |
+| [ADR-001](./0001-standardized-error-handling.md)                        | Error Handling        | Accepted | -      | Fully implemented                |
+| [ADR-011](./0011-advanced-authorization-and-access-control-strategy.md) | Authorization & RBAC  | Proposed | XL     | Policy engine, permission system |
+| [ADR-016](./0016-api-security-hardening.md)                             | Security Hardening    | Accepted | -      | Fully implemented                |
+| [ADR-029](./0029-secret-rotation-and-key-management.md)                 | Secret Rotation       | Proposed | L      | Infrastructure changes needed    |
+| [ADR-032](./0032-rate-limiting-strategy.md)                             | Rate Limiting         | Accepted | -      | Fully implemented                |
+| [ADR-033](./0033-file-upload-and-storage-strategy.md)                   | File Upload & Storage | Accepted | -      | Fully implemented                |
+
+### Category 5: Observability & Monitoring
+
+| ADR                                                                        | Title                | Status   | Effort | Notes                   |
+| -------------------------------------------------------------------------- | -------------------- | -------- | ------ | ----------------------- |
+| [ADR-004](./0004-standardized-application-wide-structured-logging.md)      | Structured Logging   | Accepted | -      | Fully implemented       |
+| [ADR-015](./0015-application-performance-monitoring-and-error-tracking.md) | APM & Error Tracking | Proposed | M      | Third-party integration |
+
+### Category 6: Deployment & Operations
+
+| ADR                                                            | Title             | Status   | Effort | Notes                      |
+| -------------------------------------------------------------- | ----------------- | -------- | ------ | -------------------------- |
+| [ADR-006](./0006-background-job-processing-and-task-queues.md) | Background Jobs   | Accepted | -      | Fully implemented          |
+| [ADR-014](./0014-containerization-and-deployment-strategy.md)  | Containerization  | Partial  | M      | Docker done, K8s pending   |
+| [ADR-017](./0017-ci-cd-and-branching-strategy.md)              | CI/CD & Branching | Accepted | -      | Fully implemented          |
+| [ADR-024](./0024-feature-flagging-strategy.md)                 | Feature Flags     | Proposed | M      | New service/library needed |
+| [ADR-037](./0037-scheduled-jobs-and-cron-pattern.md)           | Scheduled Jobs    | Accepted | -      | Fully implemented          |
+| [ADR-038](./0038-graceful-shutdown-pattern.md)                 | Graceful Shutdown | Accepted | -      | Fully implemented          |
+
+### Category 7: Frontend / User Interface
+
+| ADR                                                                      | Title               | Status   | Effort | Notes                                       |
+| ------------------------------------------------------------------------ | ------------------- | -------- | ------ | ------------------------------------------- |
+| [ADR-005](./0005-frontend-state-management-and-server-cache-strategy.md) | State Management    | Accepted | -      | Fully implemented                           |
+| [ADR-012](./0012-frontend-component-library-and-design-system.md)        | Component Library   | Partial  | L      | Core components done, design tokens pending |
+| [ADR-025](./0025-internationalization-and-localization-strategy.md)      | i18n & l10n         | Proposed | XL     | All UI strings need extraction              |
+| [ADR-026](./0026-standardized-client-side-structured-logging.md)         | Client-Side Logging | Accepted | -      | Fully implemented                           |
+
+### Category 8: Development Workflow & Quality
+
+| ADR                                                                           | Title                | Status   | Effort | Notes             |
+| ----------------------------------------------------------------------------- | -------------------- | -------- | ------ | ----------------- |
+| [ADR-010](./0010-testing-strategy-and-standards.md)                           | Testing Strategy     | Accepted | -      | Fully implemented |
+| [ADR-021](./0021-code-formatting-and-linting-unification.md)                  | Formatting & Linting | Accepted | -      | Fully implemented |
+| [ADR-027](./0027-standardized-naming-convention-for-ai-and-database-types.md) | Naming Conventions   | Accepted | -      | Fully implemented |
+
+### Category 9: Architecture Patterns
+
+| ADR                                                | Title                | Status   | Effort | Notes             |
+| -------------------------------------------------- | -------------------- | -------- | ------ | ----------------- |
+| [ADR-034](./0034-repository-pattern-standards.md)  | Repository Pattern   | Accepted | -      | Fully implemented |
+| [ADR-035](./0035-service-layer-architecture.md)    | Service Layer        | Accepted | -      | Fully implemented |
+| [ADR-036](./0036-event-bus-and-pub-sub-pattern.md) | Event Bus            | Accepted | -      | Fully implemented |
+| [ADR-039](./0039-dependency-injection-pattern.md)  | Dependency Injection | Accepted | -      | Fully implemented |
+
+---
+
+## Work Still To Be Completed (Priority Order)
+
+These ADRs are proposed but not yet implemented, ordered by suggested implementation priority:
+
+| Priority | ADR     | Title                    | Effort | Rationale                                             |
+| -------- | ------- | ------------------------ | ------ | ----------------------------------------------------- |
+| 1        | ADR-018 | API Documentation        | M      | Improves developer experience, enables SDK generation |
+| 2        | ADR-015 | APM & Error Tracking     | M      | Production visibility, debugging                      |
+| 3        | ADR-024 | Feature Flags            | M      | Safer deployments, A/B testing                        |
+| 4        | ADR-023 | Schema Migrations v2     | L      | Database evolution support                            |
+| 5        | ADR-029 | Secret Rotation          | L      | Security improvement                                  |
+| 6        | ADR-008 | API Versioning           | L      | Future API evolution                                  |
+| 7        | ADR-030 | Circuit Breaker          | L      | Resilience improvement                                |
+| 8        | ADR-022 | Real-time Notifications  | XL     | Major feature enhancement                             |
+| 9        | ADR-011 | Authorization & RBAC     | XL     | Advanced permission system                            |
+| 10       | ADR-025 | i18n & l10n              | XL     | Multi-language support                                |
+| 11       | ADR-031 | Data Retention & Privacy | XL     | Compliance requirements                               |
+
+---
+
+## Recent Implementation History
+
+| Date       | ADR     | Change                                                                                        |
+| ---------- | ------- | --------------------------------------------------------------------------------------------- |
+| 2026-01-09 | ADR-026 | Fully implemented - all client-side components, hooks, and services now use structured logger |
+| 2026-01-09 | ADR-028 | Fully implemented - all routes, middleware, and tests updated                                 |
+
+---
+
+## Notes
+
+- **Effort estimates** are rough guidelines and may vary based on current codebase state
+- **Dependencies** between ADRs should be considered when planning implementation order
+- This document should be updated when ADRs are implemented or status changes

docs/adr/index.md

@@ -4,49 +4,66 @@ This directory contains a log of the architectural decisions made for the Flyer
 
 ## 1. Foundational / Core Infrastructure
 
-**[ADR-002](./0002-standardized-transaction-management.md)**: Standardized Transaction Management and Unit of Work Pattern (Proposed)
-**[ADR-007](./0007-configuration-and-secrets-management.md)**: Configuration and Secrets Management (Proposed)
-**[ADR-020](./0020-health-checks-and-liveness-readiness-probes.md)**: Health Checks and Liveness/Readiness Probes (Proposed)
+**[ADR-002](./0002-standardized-transaction-management.md)**: Standardized Transaction Management and Unit of Work Pattern (Accepted)
+**[ADR-007](./0007-configuration-and-secrets-management.md)**: Configuration and Secrets Management (Accepted)
+**[ADR-020](./0020-health-checks-and-liveness-readiness-probes.md)**: Health Checks and Liveness/Readiness Probes (Accepted)
+**[ADR-030](./0030-graceful-degradation-and-circuit-breaker.md)**: Graceful Degradation and Circuit Breaker Pattern (Proposed)
 
 ## 2. Data Management
 
-**[ADR-009](./0009-caching-strategy-for-read-heavy-operations.md)**: Caching Strategy for Read-Heavy Operations (Proposed)
+**[ADR-009](./0009-caching-strategy-for-read-heavy-operations.md)**: Caching Strategy for Read-Heavy Operations (Accepted)
 **[ADR-013](./0013-database-schema-migration-strategy.md)**: Database Schema Migration Strategy (Proposed)
-**[ADR-019](./0019-data-backup-and-recovery-strategy.md)**: Data Backup and Recovery Strategy (Proposed)
+**[ADR-019](./0019-data-backup-and-recovery-strategy.md)**: Data Backup and Recovery Strategy (Accepted)
 **[ADR-023](./0023-database-schema-migration-strategy.md)**: Database Schema Migration Strategy (Proposed)
+**[ADR-031](./0031-data-retention-and-privacy-compliance.md)**: Data Retention and Privacy Compliance (Proposed)
 
 ## 3. API & Integration
 
-**[ADR-003](./0003-standardized-input-validation-using-middleware.md)**: Standardized Input Validation using Middleware (Proposed)
+**[ADR-003](./0003-standardized-input-validation-using-middleware.md)**: Standardized Input Validation using Middleware (Accepted)
 **[ADR-008](./0008-api-versioning-strategy.md)**: API Versioning Strategy (Proposed)
 **[ADR-018](./0018-api-documentation-strategy.md)**: API Documentation Strategy (Proposed)
 **[ADR-022](./0022-real-time-notification-system.md)**: Real-time Notification System (Proposed)
+**[ADR-028](./0028-api-response-standardization.md)**: API Response Standardization and Envelope Pattern (Implemented)
 
 ## 4. Security & Compliance
 
 **[ADR-001](./0001-standardized-error-handling.md)**: Standardized Error Handling for Service and Repository Layers (Accepted)
 **[ADR-011](./0011-advanced-authorization-and-access-control-strategy.md)**: Advanced Authorization and Access Control Strategy (Proposed)
-**[ADR-016](./0016-api-security-hardening.md)**: API Security Hardening (Proposed)
+**[ADR-016](./0016-api-security-hardening.md)**: API Security Hardening (Accepted)
+**[ADR-029](./0029-secret-rotation-and-key-management.md)**: Secret Rotation and Key Management Strategy (Proposed)
+**[ADR-032](./0032-rate-limiting-strategy.md)**: Rate Limiting Strategy (Accepted)
+**[ADR-033](./0033-file-upload-and-storage-strategy.md)**: File Upload and Storage Strategy (Accepted)
 
 ## 5. Observability & Monitoring
 
-**[ADR-004](./0004-standardized-application-wide-structured-logging.md)**: Standardized Application-Wide Structured Logging (Proposed)
+**[ADR-004](./0004-standardized-application-wide-structured-logging.md)**: Standardized Application-Wide Structured Logging (Accepted)
 **[ADR-015](./0015-application-performance-monitoring-and-error-tracking.md)**: Application Performance Monitoring (APM) and Error Tracking (Proposed)
 
 ## 6. Deployment & Operations
 
-**[ADR-006](./0006-background-job-processing-and-task-queues.md)**: Background Job Processing and Task Queues (Proposed)
-**[ADR-014](./0014-containerization-and-deployment-strategy.md)**: Containerization and Deployment Strategy (Proposed)
-**[ADR-017](./0017-ci-cd-and-branching-strategy.md)**: CI/CD and Branching Strategy (Proposed)
+**[ADR-006](./0006-background-job-processing-and-task-queues.md)**: Background Job Processing and Task Queues (Accepted)
+**[ADR-014](./0014-containerization-and-deployment-strategy.md)**: Containerization and Deployment Strategy (Partially Implemented)
+**[ADR-017](./0017-ci-cd-and-branching-strategy.md)**: CI/CD and Branching Strategy (Accepted)
 **[ADR-024](./0024-feature-flagging-strategy.md)**: Feature Flagging Strategy (Proposed)
+**[ADR-037](./0037-scheduled-jobs-and-cron-pattern.md)**: Scheduled Jobs and Cron Pattern (Accepted)
+**[ADR-038](./0038-graceful-shutdown-pattern.md)**: Graceful Shutdown Pattern (Accepted)
 
 ## 7. Frontend / User Interface
 
-**[ADR-005](./0005-frontend-state-management-and-server-cache-strategy.md)**: Frontend State Management and Server Cache Strategy (Proposed)
-**[ADR-012](./0012-frontend-component-library-and-design-system.md)**: Frontend Component Library and Design System (Proposed)
+**[ADR-005](./0005-frontend-state-management-and-server-cache-strategy.md)**: Frontend State Management and Server Cache Strategy (Accepted)
+**[ADR-012](./0012-frontend-component-library-and-design-system.md)**: Frontend Component Library and Design System (Partially Implemented)
 **[ADR-025](./0025-internationalization-and-localization-strategy.md)**: Internationalization (i18n) and Localization (l10n) Strategy (Proposed)
+**[ADR-026](./0026-standardized-client-side-structured-logging.md)**: Standardized Client-Side Structured Logging (Proposed)
 
 ## 8. Development Workflow & Quality
 
-**[ADR-010](./0010-testing-strategy-and-standards.md)**: Testing Strategy and Standards (Proposed)
-**[ADR-021](./0021-code-formatting-and-linting-unification.md)**: Code Formatting and Linting Unification (Proposed)
+**[ADR-010](./0010-testing-strategy-and-standards.md)**: Testing Strategy and Standards (Accepted)
+**[ADR-021](./0021-code-formatting-and-linting-unification.md)**: Code Formatting and Linting Unification (Accepted)
+**[ADR-027](./0027-standardized-naming-convention-for-ai-and-database-types.md)**: Standardized Naming Convention for AI and Database Types (Accepted)
+
+## 9. Architecture Patterns
+
+**[ADR-034](./0034-repository-pattern-standards.md)**: Repository Pattern Standards (Accepted)
+**[ADR-035](./0035-service-layer-architecture.md)**: Service Layer Architecture (Accepted)
+**[ADR-036](./0036-event-bus-and-pub-sub-pattern.md)**: Event Bus and Pub/Sub Pattern (Accepted)
+**[ADR-039](./0039-dependency-injection-pattern.md)**: Dependency Injection Pattern (Accepted)

eslint.config.js

@@ -3,6 +3,7 @@ import tseslint from 'typescript-eslint';
 import pluginReact from 'eslint-plugin-react';
 import pluginReactHooks from 'eslint-plugin-react-hooks';
 import pluginReactRefresh from 'eslint-plugin-react-refresh';
+import eslintConfigPrettier from 'eslint-config-prettier';
 
 export default tseslint.config(
   {
@@ -29,4 +30,26 @@ export default tseslint.config(
   },
   // TypeScript files
   ...tseslint.configs.recommended,
+  // Allow underscore-prefixed variables to be unused (common convention for intentionally unused params)
+  {
+    files: ['**/*.{ts,tsx}'],
+    rules: {
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+        },
+      ],
+    },
+  },
+  // Relaxed rules for test files - see ADR-021 for rationale
+  {
+    files: ['**/*.test.ts', '**/*.test.tsx', '**/*.spec.ts', '**/*.spec.tsx'],
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+    },
+  },
+  // Prettier compatibility - must be last to override other formatting rules
+  eslintConfigPrettier,
 );

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "flyer-crawler",
-  "version": "0.9.67",
+  "version": "0.9.76",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "flyer-crawler",
-      "version": "0.9.67",
+      "version": "0.9.76",
       "dependencies": {
         "@bull-board/api": "^6.14.2",
         "@bull-board/express": "^6.14.2",
@@ -22,6 +22,7 @@
         "express": "^5.1.0",
         "express-list-endpoints": "^7.1.1",
         "express-rate-limit": "^8.2.1",
+        "helmet": "^8.1.0",
         "ioredis": "^5.8.2",
         "jsonwebtoken": "^9.0.2",
         "lucide-react": "^0.555.0",
@@ -92,8 +93,10 @@
         "eslint-plugin-react-refresh": "^0.4.24",
         "glob": "^13.0.0",
         "globals": "16.5.0",
+        "husky": "^9.1.7",
         "istanbul-reports": "^3.2.0",
         "jsdom": "^27.2.0",
+        "lint-staged": "^16.2.7",
         "msw": "^2.12.3",
         "nyc": "^17.1.0",
         "pino-pretty": "^13.1.3",
@@ -6144,6 +6147,22 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ansi-escapes": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-7.2.0.tgz",
+      "integrity": "sha512-g6LhBsl+GBPRWGWsBtutpzBYuIIdBkLEvad5C/va/74Db018+5TZiyA26cZJAr3Rft5lprVqOIPxf5Vid6tqAw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "environment": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/ansi-regex": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
@@ -6952,6 +6971,19 @@
         "balanced-match": "^1.0.0"
       }
     },
+    "node_modules/braces": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
+      "integrity": "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fill-range": "^7.1.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/browserslist": {
       "version": "4.28.1",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.1.tgz",
@@ -7286,6 +7318,85 @@
         "node": ">=6"
       }
     },
+    "node_modules/cli-cursor": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-5.0.0.tgz",
+      "integrity": "sha512-aCj4O5wKyszjMmDT4tZj93kxyydN/K5zPWSCe6/0AV/AA1pqe5ZBIw0a2ZfPQV7lL5/yb5HsUreJ6UFAF1tEQw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "restore-cursor": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/cli-truncate/-/cli-truncate-5.1.1.tgz",
+      "integrity": "sha512-SroPvNHxUnk+vIW/dOSfNqdy1sPEFkrTk6TUtqLCnBlo3N7TNYYkzzN7uSD6+jVjrdO4+p8nH7JzH6cIvUem6A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "slice-ansi": "^7.1.0",
+        "string-width": "^8.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/ansi-regex": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.2.2.tgz",
+      "integrity": "sha512-Bq3SmSpyFHaWjPk8If9yc6svM8c56dB5BAtW4Qbw5jHTwwXXcTLoRMkpDJp6VL0XzlWaCHTXrkFURMYmD0sLqg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-regex?sponsor=1"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/string-width": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-8.1.0.tgz",
+      "integrity": "sha512-Kxl3KJGb/gxkaUMOjRsQ8IrXiGW75O4E3RPjFIINOVH8AMl2SQ/yWdTzWwF3FevIX9LcMAjJW+GRwAlAbTSXdg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "get-east-asian-width": "^1.3.0",
+        "strip-ansi": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/strip-ansi": {
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.2.tgz",
+      "integrity": "sha512-gmBGslpoQJtgnMAvOVqGZpEz9dyoKTCzy2nfz/n8aIFhN/jCE/rCmcxabB6jOOHV+0WNnylOxaxBQPSvcWklhA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
+      }
+    },
     "node_modules/cli-width": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/cli-width/-/cli-width-4.1.0.tgz",
@@ -7394,6 +7505,16 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/commander": {
+      "version": "14.0.2",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-14.0.2.tgz",
+      "integrity": "sha512-TywoWNNRbhoD0BXs1P3ZEScW8W5iKrnbithIl0YH+uCmBd0QpPOA8yc82DS3BIE5Ma6FnBVUsJ7wVUDz4dvOWQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/commondir": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
@@ -8344,6 +8465,19 @@
         "url": "https://github.com/fb55/entities?sponsor=1"
       }
     },
+    "node_modules/environment": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/environment/-/environment-1.1.0.tgz",
+      "integrity": "sha512-xUtoPkMggbz0MPyPiIWr1Kp4aeWJjDZ6SMvURhimjdZgsRuDplF5/s9hcgGhyXMhs+6vpnuoiZ2kFiu3FMnS8Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/es-abstract": {
       "version": "1.24.1",
       "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.24.1.tgz",
@@ -9292,6 +9426,19 @@
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+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.4.1.tgz",
+      "integrity": "sha512-q1b3N5QkRUWUl7iyylaaj3kOpIT0N2i9MqIEQXP73GVsN9cw3fdx8X63cEmWhJGi2PPCF23Ijp7ktmd39rawIA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/rimraf": {
       "version": "6.1.2",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-6.1.2.tgz",
@@ -14957,6 +15491,52 @@
         "node": ">=18"
       }
     },
+    "node_modules/slice-ansi": {
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-7.1.2.tgz",
+      "integrity": "sha512-iOBWFgUX7caIZiuutICxVgX1SdxwAVFFKwt1EvMYYec/NWO5meOJ6K5uQxhrYBdQJne4KxiqZc+KptFOWFSI9w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^6.2.1",
+        "is-fullwidth-code-point": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/slice-ansi?sponsor=1"
+      }
+    },
+    "node_modules/slice-ansi/node_modules/ansi-styles": {
+      "version": "6.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.3.tgz",
+      "integrity": "sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/slice-ansi/node_modules/is-fullwidth-code-point": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-5.1.0.tgz",
+      "integrity": "sha512-5XHYaSyiqADb4RnZ1Bdad6cPp8Toise4TzEjcOYDHZkTCbKgiUl7WTUCpNWHuxmDt91wnsZBc9xinNzopv3JMQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "get-east-asian-width": "^1.3.1"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/sonic-boom": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/sonic-boom/-/sonic-boom-4.2.0.tgz",
@@ -15230,6 +15810,16 @@
         "safe-buffer": "~5.2.0"
       }
     },
+    "node_modules/string-argv": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/string-argv/-/string-argv-0.3.2.tgz",
+      "integrity": "sha512-aqD2Q0144Z+/RqG52NeHEkZauTAUWJO8c6yTftGJKO3Tja5tUgIfmIl6kExvhtxSDP7fXB6DvzkfMpCd/F3G+Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6.19"
+      }
+    },
     "node_modules/string-width": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
@@ -15790,6 +16380,19 @@
         "node": ">=14.14"
       }
     },
+    "node_modules/to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "is-number": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=8.0"
+      }
+    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "flyer-crawler",
   "private": true,
-  "version": "0.9.67",
+  "version": "0.9.76",
   "type": "module",
   "scripts": {
     "dev": "concurrently \"npm:start:dev\" \"vite\"",
@@ -24,7 +24,8 @@
     "start:test": "NODE_ENV=test NODE_V8_COVERAGE=.coverage/tmp/integration-server tsx server.ts",
     "db:reset:dev": "NODE_ENV=development tsx src/db/seed.ts",
     "db:reset:test": "NODE_ENV=test tsx src/db/seed.ts",
-    "worker:prod": "NODE_ENV=production tsx src/services/queueService.server.ts"
+    "worker:prod": "NODE_ENV=production tsx src/services/queueService.server.ts",
+    "prepare": "node -e \"try { require.resolve('husky') } catch (e) { process.exit(0) }\" && husky || true"
   },
   "dependencies": {
     "@bull-board/api": "^6.14.2",
@@ -41,6 +42,7 @@
     "express": "^5.1.0",
     "express-list-endpoints": "^7.1.1",
     "express-rate-limit": "^8.2.1",
+    "helmet": "^8.1.0",
     "ioredis": "^5.8.2",
     "jsonwebtoken": "^9.0.2",
     "lucide-react": "^0.555.0",
@@ -111,8 +113,10 @@
     "eslint-plugin-react-refresh": "^0.4.24",
     "glob": "^13.0.0",
     "globals": "16.5.0",
+    "husky": "^9.1.7",
     "istanbul-reports": "^3.2.0",
     "jsdom": "^27.2.0",
+    "lint-staged": "^16.2.7",
     "msw": "^2.12.3",
     "nyc": "^17.1.0",
     "pino-pretty": "^13.1.3",

scripts/docker-init.sh

@@ -0,0 +1,150 @@
+#!/bin/bash
+# scripts/docker-init.sh
+# ============================================================================
+# CONTAINER INITIALIZATION SCRIPT
+# ============================================================================
+# Purpose:
+# This script is run when the dev container is created for the first time.
+# It handles all first-run setup tasks to ensure a fully working environment.
+#
+# Tasks performed:
+#   1. Install npm dependencies (if not already done)
+#   2. Wait for PostgreSQL to be ready
+#   3. Wait for Redis to be ready
+#   4. Initialize the database schema
+#   5. Seed the database with development data
+#
+# Usage:
+# This script is called automatically by devcontainer.json's postCreateCommand.
+# It can also be run manually: ./scripts/docker-init.sh
+# ============================================================================
+
+set -e  # Exit immediately on error
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+log_info() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+log_success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+log_warning() {
+    echo -e "${YELLOW}[WARNING]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+# ============================================================================
+# 1. Install npm dependencies
+# ============================================================================
+log_info "Step 1/5: Installing npm dependencies..."
+if [ -d "node_modules" ] && [ -f "node_modules/.package-lock.json" ]; then
+    log_info "node_modules exists, running npm install to sync..."
+fi
+npm install
+log_success "npm dependencies installed."
+
+# ============================================================================
+# 2. Wait for PostgreSQL to be ready
+# ============================================================================
+log_info "Step 2/5: Waiting for PostgreSQL to be ready..."
+
+POSTGRES_HOST="${DB_HOST:-postgres}"
+POSTGRES_PORT="${DB_PORT:-5432}"
+POSTGRES_USER="${DB_USER:-postgres}"
+POSTGRES_DB="${DB_NAME:-flyer_crawler_dev}"
+
+MAX_RETRIES=30
+RETRY_COUNT=0
+
+until PGPASSWORD="${DB_PASSWORD:-postgres}" psql -h "$POSTGRES_HOST" -p "$POSTGRES_PORT" -U "$POSTGRES_USER" -d "postgres" -c '\q' 2>/dev/null; do
+    RETRY_COUNT=$((RETRY_COUNT + 1))
+    if [ $RETRY_COUNT -ge $MAX_RETRIES ]; then
+        log_error "PostgreSQL did not become ready after $MAX_RETRIES attempts. Exiting."
+        exit 1
+    fi
+    log_warning "PostgreSQL is not ready yet (attempt $RETRY_COUNT/$MAX_RETRIES). Waiting 2 seconds..."
+    sleep 2
+done
+
+log_success "PostgreSQL is ready."
+
+# ============================================================================
+# 3. Wait for Redis to be ready
+# ============================================================================
+log_info "Step 3/5: Waiting for Redis to be ready..."
+
+REDIS_HOST="${REDIS_HOST:-redis}"
+REDIS_PORT="${REDIS_PORT:-6379}"
+
+MAX_RETRIES=30
+RETRY_COUNT=0
+
+# Extract host from REDIS_URL if set
+if [ -n "$REDIS_URL" ]; then
+    # Parse redis://host:port format
+    REDIS_HOST=$(echo "$REDIS_URL" | sed -E 's|redis://([^:]+):?.*|\1|')
+fi
+
+until redis-cli -h "$REDIS_HOST" -p "$REDIS_PORT" ping 2>/dev/null | grep -q PONG; do
+    RETRY_COUNT=$((RETRY_COUNT + 1))
+    if [ $RETRY_COUNT -ge $MAX_RETRIES ]; then
+        log_error "Redis did not become ready after $MAX_RETRIES attempts. Exiting."
+        exit 1
+    fi
+    log_warning "Redis is not ready yet (attempt $RETRY_COUNT/$MAX_RETRIES). Waiting 2 seconds..."
+    sleep 2
+done
+
+log_success "Redis is ready."
+
+# ============================================================================
+# 4. Check if database needs initialization
+# ============================================================================
+log_info "Step 4/5: Checking database state..."
+
+# Check if the users table exists (indicator of initialized schema)
+TABLE_EXISTS=$(PGPASSWORD="${DB_PASSWORD:-postgres}" psql -h "$POSTGRES_HOST" -p "$POSTGRES_PORT" -U "$POSTGRES_USER" -d "$POSTGRES_DB" -t -c "SELECT EXISTS (SELECT FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'users');" 2>/dev/null | tr -d '[:space:]' || echo "f")
+
+if [ "$TABLE_EXISTS" = "t" ]; then
+    log_info "Database schema already exists. Skipping initialization."
+    log_info "To reset the database, run: npm run db:reset:dev"
+else
+    log_info "Database schema not found. Initializing..."
+
+    # ============================================================================
+    # 5. Initialize and seed the database
+    # ============================================================================
+    log_info "Step 5/5: Running database initialization and seed..."
+
+    # The db:reset:dev script handles both schema creation and seeding
+    npm run db:reset:dev
+
+    log_success "Database initialized and seeded successfully."
+fi
+
+# ============================================================================
+# Done!
+# ============================================================================
+echo ""
+log_success "=========================================="
+log_success "Container initialization complete!"
+log_success "=========================================="
+echo ""
+log_info "Default test accounts:"
+echo "  Admin: admin@example.com / adminpass"
+echo "  User:  user@example.com / userpass"
+echo ""
+log_info "To start the development server, run:"
+echo "  npm run dev:container"
+echo ""

server.ts

@@ -1,6 +1,7 @@
 // server.ts
 import express, { Request, Response, NextFunction } from 'express';
 import { randomUUID } from 'crypto';
+import helmet from 'helmet';
 import timeout from 'connect-timeout';
 import cookieParser from 'cookie-parser';
 import listEndpoints from 'express-list-endpoints';
@@ -62,6 +63,38 @@ logger.info('-----------------------------------------------\n');
 
 const app = express();
 
+// --- Security Headers Middleware (ADR-016) ---
+// Helmet sets various HTTP headers to help protect the app from common web vulnerabilities.
+// Must be applied early in the middleware chain, before any routes.
+app.use(
+  helmet({
+    // Content Security Policy - configured for API + SPA frontend
+    contentSecurityPolicy: {
+      directives: {
+        defaultSrc: ["'self'"],
+        scriptSrc: ["'self'", "'unsafe-inline'"], // Allow inline scripts for React
+        styleSrc: ["'self'", "'unsafe-inline'"], // Allow inline styles for Tailwind
+        imgSrc: ["'self'", 'data:', 'blob:', 'https:'], // Allow images from various sources
+        fontSrc: ["'self'", 'https:', 'data:'],
+        connectSrc: ["'self'", 'https:', 'wss:'], // Allow API and WebSocket connections
+        frameSrc: ["'none'"], // Disallow iframes
+        objectSrc: ["'none'"], // Disallow plugins
+        upgradeInsecureRequests: process.env.NODE_ENV === 'production' ? [] : null,
+      },
+    },
+    // Cross-Origin settings for API
+    crossOriginEmbedderPolicy: false, // Disabled to allow loading external images
+    crossOriginResourcePolicy: { policy: 'cross-origin' }, // Allow cross-origin resource loading
+    // Additional security headers
+    hsts: {
+      maxAge: 31536000, // 1 year in seconds
+      includeSubDomains: true,
+      preload: true,
+    },
+    referrerPolicy: { policy: 'strict-origin-when-cross-origin' },
+  }),
+);
+
 // --- Core Middleware ---
 // Increase the limit for JSON and URL-encoded bodies. This is crucial for handling large file uploads
 // that are part of multipart/form-data requests, as the overall request size is checked.

sql/00-init-extensions.sql

@@ -0,0 +1,24 @@
+-- sql/00-init-extensions.sql
+-- ============================================================================
+-- DATABASE EXTENSIONS INITIALIZATION
+-- ============================================================================
+-- This script is automatically run by PostgreSQL on database creation
+-- when placed in /docker-entrypoint-initdb.d/
+--
+-- It creates the required extensions before the schema is loaded.
+-- ============================================================================
+
+-- Enable UUID generation
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+-- Enable trigram fuzzy text search
+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+
+-- Enable PostGIS for geographic queries (usually pre-installed in postgis image)
+CREATE EXTENSION IF NOT EXISTS postgis;
+
+-- Log completion
+DO $$
+BEGIN
+  RAISE NOTICE '✅ All required PostgreSQL extensions have been created';
+END $$;

src/App.tsx

@@ -56,13 +56,16 @@ function App() {
   // Debugging: Log renders to identify infinite loops
   useEffect(() => {
     if (process.env.NODE_ENV === 'test') {
-      console.log('[App] Render:', {
-        flyersCount: flyers.length,
-        selectedFlyerId: selectedFlyer?.flyer_id,
-        flyerIdFromUrl,
-        authStatus,
-        profileId: userProfile?.user.user_id,
-      });
+      logger.debug(
+        {
+          flyersCount: flyers.length,
+          selectedFlyerId: selectedFlyer?.flyer_id,
+          flyerIdFromUrl,
+          authStatus,
+          profileId: userProfile?.user.user_id,
+        },
+        '[App] Render',
+      );
     }
   });
 
@@ -76,7 +79,6 @@ function App() {
   const handleCloseVoiceAssistant = useCallback(() => closeModal('voiceAssistant'), [closeModal]);
 
   const handleOpenWhatsNew = useCallback(() => openModal('whatsNew'), [openModal]);
-  const handleCloseWhatsNew = useCallback(() => closeModal('whatsNew'), [closeModal]);
 
   const handleOpenCorrectionTool = useCallback(() => openModal('correctionTool'), [openModal]);
   const handleCloseCorrectionTool = useCallback(() => closeModal('correctionTool'), [closeModal]);
@@ -134,7 +136,7 @@ function App() {
 
   useEffect(() => {
     if (!selectedFlyer && flyers.length > 0) {
-      if (process.env.NODE_ENV === 'test') console.log('[App] Effect: Auto-selecting first flyer');
+      if (process.env.NODE_ENV === 'test') logger.debug('[App] Effect: Auto-selecting first flyer');
       handleFlyerSelect(flyers[0]);
     }
   }, [flyers, selectedFlyer, handleFlyerSelect]);

src/components/FlyerCorrectionTool.tsx

@@ -34,17 +34,16 @@ export const FlyerCorrectionTool: React.FC<FlyerCorrectionToolProps> = ({
   // Fetch the image and store it as a File object for API submission
   useEffect(() => {
     if (isOpen && imageUrl) {
-      console.debug('[DEBUG] FlyerCorrectionTool: isOpen is true, fetching image URL:', imageUrl);
+      logger.debug({ imageUrl }, '[FlyerCorrectionTool] isOpen is true, fetching image URL');
       fetch(imageUrl)
         .then((res) => res.blob())
         .then((blob) => {
           const file = new File([blob], 'flyer-image.jpg', { type: blob.type });
           setImageFile(file);
-          console.debug('[DEBUG] FlyerCorrectionTool: Image fetched and stored as File object.');
+          logger.debug('[FlyerCorrectionTool] Image fetched and stored as File object');
         })
         .catch((err) => {
-          console.error('[DEBUG] FlyerCorrectionTool: Failed to fetch image.', { err });
-          logger.error({ error: err }, 'Failed to fetch image for correction tool');
+          logger.error({ err }, '[FlyerCorrectionTool] Failed to fetch image');
           notifyError('Could not load the image for correction.');
         });
     }
@@ -112,26 +111,37 @@ export const FlyerCorrectionTool: React.FC<FlyerCorrectionToolProps> = ({
   const handleMouseUp = () => {
     setIsDrawing(false);
     setStartPoint(null);
-    console.debug('[DEBUG] FlyerCorrectionTool: Mouse Up - selection complete.', { selectionRect });
+    logger.debug({ selectionRect }, '[FlyerCorrectionTool] Mouse Up - selection complete');
   };
 
   const handleRescan = async (type: ExtractionType) => {
-    console.debug(`[DEBUG] handleRescan triggered for type: ${type}`);
-    console.debug(
-      `[DEBUG] handleRescan state: selectionRect=${!!selectionRect}, imageRef=${!!imageRef.current}, imageFile=${!!imageFile}`,
+    logger.debug({ type }, '[FlyerCorrectionTool] handleRescan triggered');
+    logger.debug(
+      {
+        hasSelectionRect: !!selectionRect,
+        hasImageRef: !!imageRef.current,
+        hasImageFile: !!imageFile,
+      },
+      '[FlyerCorrectionTool] handleRescan state',
     );
 
     if (!selectionRect || !imageRef.current || !imageFile) {
-      console.warn('[DEBUG] handleRescan: Guard failed. Missing prerequisites.');
-      if (!selectionRect) console.warn('[DEBUG] Reason: No selectionRect');
-      if (!imageRef.current) console.warn('[DEBUG] Reason: No imageRef');
-      if (!imageFile) console.warn('[DEBUG] Reason: No imageFile');
-
+      logger.warn(
+        {
+          hasSelectionRect: !!selectionRect,
+          hasImageRef: !!imageRef.current,
+          hasImageFile: !!imageFile,
+        },
+        '[FlyerCorrectionTool] handleRescan: Guard failed. Missing prerequisites',
+      );
       notifyError('Please select an area on the image first.');
       return;
     }
 
-    console.debug(`[DEBUG] handleRescan: Prerequisites met. Starting processing for "${type}".`);
+    logger.debug(
+      { type },
+      '[FlyerCorrectionTool] handleRescan: Prerequisites met. Starting processing',
+    );
     setIsProcessing(true);
     try {
       // Scale selection coordinates to the original image dimensions
@@ -145,38 +155,34 @@ export const FlyerCorrectionTool: React.FC<FlyerCorrectionToolProps> = ({
         width: selectionRect.width * scaleX,
         height: selectionRect.height * scaleY,
       };
-      console.debug('[DEBUG] handleRescan: Calculated scaled cropArea:', cropArea);
+      logger.debug({ cropArea }, '[FlyerCorrectionTool] handleRescan: Calculated scaled cropArea');
 
-      console.debug('[DEBUG] handleRescan: Awaiting aiApiClient.rescanImageArea...');
+      logger.debug('[FlyerCorrectionTool] handleRescan: Awaiting aiApiClient.rescanImageArea');
       const response = await aiApiClient.rescanImageArea(imageFile, cropArea, type);
-      console.debug('[DEBUG] handleRescan: API call returned. Response ok:', response.ok);
+      logger.debug({ ok: response.ok }, '[FlyerCorrectionTool] handleRescan: API call returned');
       if (!response.ok) {
         const errorData = await response.json();
         throw new Error(errorData.message || 'Failed to rescan area.');
       }
 
       const { text } = await response.json();
-      console.debug('[DEBUG] handleRescan: Successfully extracted text:', text);
+      logger.debug({ text }, '[FlyerCorrectionTool] handleRescan: Successfully extracted text');
       notifySuccess(`Extracted: ${text}`);
       onDataExtracted(type, text);
       onClose(); // Close modal on success
     } catch (err) {
       const msg = err instanceof Error ? err.message : 'An unknown error occurred.';
-      console.error('[DEBUG] handleRescan: Caught an error.', { error: err });
+      logger.error({ err }, '[FlyerCorrectionTool] handleRescan: Caught an error');
       notifyError(msg);
-      logger.error({ error: err }, 'Error during rescan:');
     } finally {
-      console.debug('[DEBUG] handleRescan: Finished. Setting isProcessing=false.');
+      logger.debug('[FlyerCorrectionTool] handleRescan: Finished. Setting isProcessing=false');
       setIsProcessing(false);
     }
   };
 
   if (!isOpen) return null;
 
-  console.debug('[DEBUG] FlyerCorrectionTool: Rendering with state:', {
-    isProcessing,
-    hasSelection: !!selectionRect,
-  });
+  logger.debug({ isProcessing, hasSelection: !!selectionRect }, '[FlyerCorrectionTool] Rendering');
   return (
     <div
       className="fixed inset-0 bg-black bg-opacity-75 z-50 flex justify-center items-center p-4"

src/components/Leaderboard.test.tsx

@@ -1,12 +1,11 @@
 // src/components/Leaderboard.test.tsx
 import React from 'react';
 import { screen, waitFor } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
 import Leaderboard from './Leaderboard';
 import * as apiClient from '../services/apiClient';
 import { LeaderboardUser } from '../types';
 import { createMockLeaderboardUser } from '../tests/utils/mockFactories';
-import { createMockLogger } from '../tests/utils/mockLogger';
 import { renderWithProviders } from '../tests/utils/renderWithProviders';
 
 // The apiClient and logger are mocked globally.

src/config/env.ts

@@ -0,0 +1,303 @@
+// src/config/env.ts
+/**
+ * @file Centralized, schema-validated configuration service.
+ * Implements ADR-007: Configuration and Secrets Management.
+ *
+ * This module parses and validates all environment variables at application startup.
+ * If any required configuration is missing or invalid, the application will fail fast
+ * with a clear error message.
+ *
+ * Usage:
+ *   import { config } from './config/env';
+ *   console.log(config.database.host);
+ */
+import { z } from 'zod';
+
+// --- Schema Definitions ---
+
+/**
+ * Helper to parse string to integer with default.
+ * Handles empty strings by treating them as undefined.
+ */
+const intWithDefault = (defaultValue: number) =>
+  z
+    .string()
+    .optional()
+    .transform((val) => (val && val.trim() !== '' ? parseInt(val, 10) : defaultValue))
+    .pipe(z.number().int());
+
+/**
+ * Helper to parse string to float with default.
+ */
+const floatWithDefault = (defaultValue: number) =>
+  z
+    .string()
+    .optional()
+    .transform((val) => (val && val.trim() !== '' ? parseFloat(val) : defaultValue))
+    .pipe(z.number());
+
+/**
+ * Helper to parse string 'true'/'false' to boolean.
+ */
+const booleanString = (defaultValue: boolean) =>
+  z
+    .string()
+    .optional()
+    .transform((val) => (val === undefined ? defaultValue : val === 'true'));
+
+/**
+ * Database configuration schema.
+ */
+const databaseSchema = z.object({
+  host: z.string().min(1, 'DB_HOST is required'),
+  port: intWithDefault(5432),
+  user: z.string().min(1, 'DB_USER is required'),
+  password: z.string().min(1, 'DB_PASSWORD is required'),
+  name: z.string().min(1, 'DB_NAME is required'),
+});
+
+/**
+ * Redis configuration schema.
+ */
+const redisSchema = z.object({
+  url: z.string().url('REDIS_URL must be a valid URL'),
+  password: z.string().optional(),
+});
+
+/**
+ * Authentication configuration schema.
+ */
+const authSchema = z.object({
+  jwtSecret: z.string().min(32, 'JWT_SECRET must be at least 32 characters for security'),
+  jwtSecretPrevious: z.string().optional(), // For secret rotation (ADR-029)
+});
+
+/**
+ * SMTP/Email configuration schema.
+ * All fields are optional - email service degrades gracefully if not configured.
+ */
+const smtpSchema = z.object({
+  host: z.string().optional(),
+  port: intWithDefault(587),
+  user: z.string().optional(),
+  pass: z.string().optional(),
+  secure: booleanString(false),
+  fromEmail: z.string().email().optional(),
+});
+
+/**
+ * AI/Gemini configuration schema.
+ */
+const aiSchema = z.object({
+  geminiApiKey: z.string().optional(),
+  geminiRpm: intWithDefault(5),
+  priceQualityThreshold: floatWithDefault(0.5),
+});
+
+/**
+ * Google services configuration schema.
+ */
+const googleSchema = z.object({
+  mapsApiKey: z.string().optional(),
+  clientId: z.string().optional(),
+  clientSecret: z.string().optional(),
+});
+
+/**
+ * Worker concurrency configuration schema.
+ */
+const workerSchema = z.object({
+  concurrency: intWithDefault(1),
+  lockDuration: intWithDefault(30000),
+  emailConcurrency: intWithDefault(10),
+  analyticsConcurrency: intWithDefault(1),
+  cleanupConcurrency: intWithDefault(10),
+  weeklyAnalyticsConcurrency: intWithDefault(1),
+});
+
+/**
+ * Server configuration schema.
+ */
+const serverSchema = z.object({
+  nodeEnv: z.enum(['development', 'production', 'test']).default('development'),
+  port: intWithDefault(3001),
+  frontendUrl: z.string().url().optional(),
+  baseUrl: z.string().optional(),
+  storagePath: z.string().default('/var/www/flyer-crawler.projectium.com/flyer-images'),
+});
+
+/**
+ * Complete environment configuration schema.
+ */
+const envSchema = z.object({
+  database: databaseSchema,
+  redis: redisSchema,
+  auth: authSchema,
+  smtp: smtpSchema,
+  ai: aiSchema,
+  google: googleSchema,
+  worker: workerSchema,
+  server: serverSchema,
+});
+
+export type EnvConfig = z.infer<typeof envSchema>;
+
+// --- Configuration Loading ---
+
+/**
+ * Maps environment variables to the configuration structure.
+ * This is the single source of truth for which env vars map to which config keys.
+ */
+function loadEnvVars(): unknown {
+  return {
+    database: {
+      host: process.env.DB_HOST,
+      port: process.env.DB_PORT,
+      user: process.env.DB_USER,
+      password: process.env.DB_PASSWORD,
+      name: process.env.DB_NAME,
+    },
+    redis: {
+      url: process.env.REDIS_URL,
+      password: process.env.REDIS_PASSWORD,
+    },
+    auth: {
+      jwtSecret: process.env.JWT_SECRET,
+      jwtSecretPrevious: process.env.JWT_SECRET_PREVIOUS,
+    },
+    smtp: {
+      host: process.env.SMTP_HOST,
+      port: process.env.SMTP_PORT,
+      user: process.env.SMTP_USER,
+      pass: process.env.SMTP_PASS,
+      secure: process.env.SMTP_SECURE,
+      fromEmail: process.env.SMTP_FROM_EMAIL,
+    },
+    ai: {
+      geminiApiKey: process.env.GEMINI_API_KEY,
+      geminiRpm: process.env.GEMINI_RPM,
+      priceQualityThreshold: process.env.AI_PRICE_QUALITY_THRESHOLD,
+    },
+    google: {
+      mapsApiKey: process.env.GOOGLE_MAPS_API_KEY,
+      clientId: process.env.GOOGLE_CLIENT_ID,
+      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
+    },
+    worker: {
+      concurrency: process.env.WORKER_CONCURRENCY,
+      lockDuration: process.env.WORKER_LOCK_DURATION,
+      emailConcurrency: process.env.EMAIL_WORKER_CONCURRENCY,
+      analyticsConcurrency: process.env.ANALYTICS_WORKER_CONCURRENCY,
+      cleanupConcurrency: process.env.CLEANUP_WORKER_CONCURRENCY,
+      weeklyAnalyticsConcurrency: process.env.WEEKLY_ANALYTICS_WORKER_CONCURRENCY,
+    },
+    server: {
+      nodeEnv: process.env.NODE_ENV,
+      port: process.env.PORT,
+      frontendUrl: process.env.FRONTEND_URL,
+      baseUrl: process.env.BASE_URL,
+      storagePath: process.env.STORAGE_PATH,
+    },
+  };
+}
+
+/**
+ * Validates and parses environment configuration.
+ * Throws a descriptive error if validation fails.
+ */
+function parseConfig(): EnvConfig {
+  const rawConfig = loadEnvVars();
+  const result = envSchema.safeParse(rawConfig);
+
+  if (!result.success) {
+    const errors = result.error.issues.map((issue) => {
+      const path = issue.path.join('.');
+      return `  - ${path}: ${issue.message}`;
+    });
+
+    const errorMessage = [
+      '',
+      '╔════════════════════════════════════════════════════════════════╗',
+      '║           CONFIGURATION ERROR - APPLICATION STARTUP            ║',
+      '╚════════════════════════════════════════════════════════════════╝',
+      '',
+      'The following environment variables are missing or invalid:',
+      '',
+      ...errors,
+      '',
+      'Please check your .env file or environment configuration.',
+      'See ADR-007 for the complete list of required environment variables.',
+      '',
+    ].join('\n');
+
+    // In test environment, throw instead of exiting to allow test frameworks to catch
+    if (process.env.NODE_ENV === 'test') {
+      throw new Error(errorMessage);
+    }
+
+    console.error(errorMessage);
+    process.exit(1);
+  }
+
+  return result.data;
+}
+
+// --- Exported Configuration ---
+
+/**
+ * The validated application configuration.
+ * This is a singleton that is parsed once at module load time.
+ *
+ * @example
+ * ```typescript
+ * import { config } from './config/env';
+ *
+ * // Access database config
+ * const pool = new Pool({
+ *   host: config.database.host,
+ *   port: config.database.port,
+ *   user: config.database.user,
+ *   password: config.database.password,
+ *   database: config.database.name,
+ * });
+ *
+ * // Check environment
+ * if (config.server.isProduction) {
+ *   // production-only logic
+ * }
+ * ```
+ */
+export const config: EnvConfig = parseConfig();
+
+// --- Convenience Helpers ---
+
+/**
+ * Returns true if running in production environment.
+ */
+export const isProduction = config.server.nodeEnv === 'production';
+
+/**
+ * Returns true if running in test environment.
+ */
+export const isTest = config.server.nodeEnv === 'test';
+
+/**
+ * Returns true if running in development environment.
+ */
+export const isDevelopment = config.server.nodeEnv === 'development';
+
+/**
+ * Returns true if SMTP is configured (all required fields present).
+ */
+export const isSmtpConfigured =
+  !!config.smtp.host && !!config.smtp.user && !!config.smtp.pass && !!config.smtp.fromEmail;
+
+/**
+ * Returns true if AI services are configured.
+ */
+export const isAiConfigured = !!config.ai.geminiApiKey;
+
+/**
+ * Returns true if Google Maps is configured.
+ */
+export const isGoogleMapsConfigured = !!config.google.mapsApiKey;

src/hooks/useFlyerUploader.ts

@@ -2,15 +2,9 @@
 // src/hooks/useFlyerUploader.ts
 import { useState, useCallback, useMemo } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
-import {
-  uploadAndProcessFlyer,
-  getJobStatus,
-  type JobStatus,
-  JobFailedError,
-} from '../services/aiApiClient';
+import { uploadAndProcessFlyer, getJobStatus, type JobStatus } from '../services/aiApiClient';
 import { logger } from '../services/logger.client';
 import { generateFileChecksum } from '../utils/checksum';
-import type { ProcessingStage } from '../types';
 
 export type ProcessingState = 'idle' | 'uploading' | 'polling' | 'completed' | 'error';
 
@@ -105,7 +99,7 @@ export const useFlyerUploader = () => {
 
   // Consolidate state derivation for the UI from the react-query hooks using useMemo.
   // This improves performance by memoizing the derived state and makes the logic easier to follow.
-  const { processingState, errorMessage, duplicateFlyerId, flyerId, statusMessage } = useMemo(() => {
+  const { processingState, errorMessage, duplicateFlyerId, flyerId } = useMemo(() => {
     // The order of these checks is critical. Errors must be checked first to override
     // any stale `jobStatus` from a previous successful poll.
     const state: ProcessingState = (() => {
@@ -150,7 +144,7 @@ export const useFlyerUploader = () => {
       processingState: state,
       errorMessage: msg,
       duplicateFlyerId: dupId,
-      flyerId: jobStatus?.state === 'completed' ? jobStatus.returnValue?.flyerId ?? null : null,
+      flyerId: jobStatus?.state === 'completed' ? (jobStatus.returnValue?.flyerId ?? null) : null,
       statusMessage: uploadMutation.isPending ? 'Uploading file...' : jobStatus?.progress?.message,
     };
   }, [uploadMutation, jobStatus, pollError]);

src/hooks/useShoppingLists.tsx

@@ -9,6 +9,7 @@ import {
   useUpdateShoppingListItemMutation,
   useRemoveShoppingListItemMutation,
 } from './mutations';
+import { logger } from '../services/logger.client';
 import type { ShoppingListItem } from '../types';
 
 /**
@@ -84,7 +85,7 @@ const useShoppingListsHook = () => {
         await createListMutation.mutateAsync({ name });
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
-        console.error('useShoppingLists: Failed to create list', error);
+        logger.error({ err: error }, '[useShoppingLists] Failed to create list');
       }
     },
     [userProfile, createListMutation],
@@ -102,7 +103,7 @@ const useShoppingListsHook = () => {
         await deleteListMutation.mutateAsync({ listId });
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
-        console.error('useShoppingLists: Failed to delete list', error);
+        logger.error({ err: error }, '[useShoppingLists] Failed to delete list');
       }
     },
     [userProfile, deleteListMutation],
@@ -123,7 +124,7 @@ const useShoppingListsHook = () => {
         await addItemMutation.mutateAsync({ listId, item });
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
-        console.error('useShoppingLists: Failed to add item', error);
+        logger.error({ err: error }, '[useShoppingLists] Failed to add item');
       }
     },
     [userProfile, addItemMutation],
@@ -141,7 +142,7 @@ const useShoppingListsHook = () => {
         await updateItemMutation.mutateAsync({ itemId, updates });
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
-        console.error('useShoppingLists: Failed to update item', error);
+        logger.error({ err: error }, '[useShoppingLists] Failed to update item');
       }
     },
     [userProfile, updateItemMutation],
@@ -159,7 +160,7 @@ const useShoppingListsHook = () => {
         await removeItemMutation.mutateAsync({ itemId });
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
-        console.error('useShoppingLists: Failed to remove item', error);
+        logger.error({ err: error }, '[useShoppingLists] Failed to remove item');
       }
     },
     [userProfile, removeItemMutation],

src/hooks/useWatchedItems.tsx

@@ -3,6 +3,7 @@ import { useMemo, useCallback } from 'react';
 import { useAuth } from '../hooks/useAuth';
 import { useUserData } from '../hooks/useUserData';
 import { useAddWatchedItemMutation, useRemoveWatchedItemMutation } from './mutations';
+import { logger } from '../services/logger.client';
 
 /**
  * A custom hook to manage all state and logic related to a user's watched items.
@@ -43,7 +44,7 @@ const useWatchedItemsHook = () => {
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
         // Just log for debugging
-        console.error('useWatchedItems: Failed to add item', error);
+        logger.error({ err: error }, '[useWatchedItems] Failed to add item');
       }
     },
     [userProfile, addWatchedItemMutation],
@@ -62,7 +63,7 @@ const useWatchedItemsHook = () => {
       } catch (error) {
         // Error is already handled by the mutation hook (notification shown)
         // Just log for debugging
-        console.error('useWatchedItems: Failed to remove item', error);
+        logger.error({ err: error }, '[useWatchedItems] Failed to remove item');
       }
     },
     [userProfile, removeWatchedItemMutation],

src/middleware/errorHandler.test.ts

@@ -114,10 +114,13 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/generic-error');
     expect(response.status).toBe(500);
     // In test/dev, we now expect a stack trace for 5xx errors.
-    expect(response.body.message).toBe('A generic server error occurred.');
-    expect(response.body.stack).toBeDefined();
-    expect(response.body.errorId).toEqual(expect.any(String));
-    console.log('[DEBUG] errorHandler.test.ts: Received 500 error response with ID:', response.body.errorId);
+    expect(response.body.error.message).toBe('A generic server error occurred.');
+    expect(response.body.error.details.stack).toBeDefined();
+    expect(response.body.meta.requestId).toEqual(expect.any(String));
+    console.log(
+      '[DEBUG] errorHandler.test.ts: Received 500 error response with ID:',
+      response.body.meta.requestId,
+    );
     expect(mockLogger.error).toHaveBeenCalledWith(
       expect.objectContaining({
         err: expect.any(Error),
@@ -136,7 +139,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/http-error-404');
 
     expect(response.status).toBe(404);
-    expect(response.body).toEqual({ message: 'Resource not found' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'NOT_FOUND', message: 'Resource not found' },
+    });
     expect(mockLogger.error).not.toHaveBeenCalled(); // 4xx errors are not logged as server errors
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
@@ -152,7 +158,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/not-found-error');
 
     expect(response.status).toBe(404);
-    expect(response.body).toEqual({ message: 'Specific resource missing' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'NOT_FOUND', message: 'Specific resource missing' },
+    });
     expect(mockLogger.error).not.toHaveBeenCalled();
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
@@ -168,7 +177,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/fk-error');
 
     expect(response.status).toBe(400);
-    expect(response.body).toEqual({ message: 'The referenced item does not exist.' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'BAD_REQUEST', message: 'The referenced item does not exist.' },
+    });
     expect(mockLogger.error).not.toHaveBeenCalled();
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
@@ -184,7 +196,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/unique-error');
 
     expect(response.status).toBe(409); // 409 Conflict
-    expect(response.body).toEqual({ message: 'This item already exists.' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'CONFLICT', message: 'This item already exists.' },
+    });
     expect(mockLogger.error).not.toHaveBeenCalled();
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
@@ -200,9 +215,9 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/validation-error');
 
     expect(response.status).toBe(400);
-    expect(response.body.message).toBe('Input validation failed');
-    expect(response.body.errors).toBeDefined();
-    expect(response.body.errors).toEqual([
+    expect(response.body.error.message).toBe('Input validation failed');
+    expect(response.body.error.details).toBeDefined();
+    expect(response.body.error.details).toEqual([
       { path: ['body', 'email'], message: 'Invalid email format' },
     ]);
     expect(mockLogger.error).not.toHaveBeenCalled(); // 4xx errors are not logged as server errors
@@ -222,9 +237,9 @@ describe('errorHandler Middleware', () => {
 
     expect(response.status).toBe(500);
     // In test/dev, we now expect a stack trace for 5xx errors.
-    expect(response.body.message).toBe('A database connection issue occurred.');
-    expect(response.body.stack).toBeDefined();
-    expect(response.body.errorId).toEqual(expect.any(String));
+    expect(response.body.error.message).toBe('A database connection issue occurred.');
+    expect(response.body.error.details.stack).toBeDefined();
+    expect(response.body.meta.requestId).toEqual(expect.any(String));
     expect(mockLogger.error).toHaveBeenCalledWith(
       expect.objectContaining({
         err: expect.any(DatabaseError),
@@ -243,7 +258,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/unauthorized-error-no-status');
 
     expect(response.status).toBe(401);
-    expect(response.body).toEqual({ message: 'Invalid Token' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'UNAUTHORIZED', message: 'Invalid Token' },
+    });
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
         err: expect.any(Error),
@@ -258,7 +276,10 @@ describe('errorHandler Middleware', () => {
     const response = await supertest(app).get('/unauthorized-error-with-status');
 
     expect(response.status).toBe(401);
-    expect(response.body).toEqual({ message: 'Invalid Token' });
+    expect(response.body).toEqual({
+      success: false,
+      error: { code: 'UNAUTHORIZED', message: 'Invalid Token' },
+    });
     expect(mockLogger.warn).toHaveBeenCalledWith(
       {
         err: expect.any(Error),
@@ -304,17 +325,17 @@ describe('errorHandler Middleware', () => {
       const response = await supertest(app).get('/generic-error');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toMatch(
+      expect(response.body.error.message).toMatch(
         /An unexpected server error occurred. Please reference error ID: \w+/,
       );
-      expect(response.body.stack).toBeUndefined();
+      expect(response.body.error.details?.stack).toBeUndefined();
     });
 
     it('should return the actual error message for client errors (4xx) in production', async () => {
       const response = await supertest(app).get('/http-error-404');
 
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Resource not found');
+      expect(response.body.error.message).toBe('Resource not found');
     });
   });
 });

src/middleware/errorHandler.ts

@@ -1,4 +1,11 @@
 // src/middleware/errorHandler.ts
+// ============================================================================
+// CENTRALIZED ERROR HANDLING MIDDLEWARE
+// ============================================================================
+// This middleware standardizes all error responses per ADR-028.
+// It should be the LAST `app.use()` call to catch all errors.
+// ============================================================================
+
 import { Request, Response, NextFunction } from 'express';
 import crypto from 'crypto';
 import { ZodError } from 'zod';
@@ -9,12 +16,43 @@ import {
   ValidationError,
 } from '../services/db/errors.db';
 import { logger } from '../services/logger.server';
+import { ErrorCode, ApiErrorResponse } from '../types/api';
+
+/**
+ * Helper to send standardized error responses.
+ */
+function sendErrorResponse(
+  res: Response,
+  statusCode: number,
+  code: string,
+  message: string,
+  details?: unknown,
+  meta?: { requestId?: string; timestamp?: string },
+): Response<ApiErrorResponse> {
+  const response: ApiErrorResponse = {
+    success: false,
+    error: {
+      code,
+      message,
+    },
+  };
+
+  if (details !== undefined) {
+    response.error.details = details;
+  }
+
+  if (meta) {
+    response.meta = meta;
+  }
+
+  return res.status(statusCode).json(response);
+}
 
 /**
  * A centralized error handling middleware for the Express application.
  * This middleware should be the LAST `app.use()` call to catch all errors from previous routes and middleware.
  *
- * It standardizes error responses and ensures consistent logging.
+ * It standardizes error responses per ADR-028 and ensures consistent logging per ADR-004.
  */
 export const errorHandler = (err: Error, req: Request, res: Response, next: NextFunction) => {
   // If headers have already been sent, delegate to the default Express error handler.
@@ -29,16 +67,19 @@ export const errorHandler = (err: Error, req: Request, res: Response, next: Next
   if (err instanceof ZodError) {
     const statusCode = 400;
     const message = 'The request data is invalid.';
-    const errors = err.issues.map((e) => ({ path: e.path, message: e.message }));
-    log.warn({ err, validationErrors: errors, statusCode }, `Client Error on ${req.method} ${req.path}: ${message}`);
-    return res.status(statusCode).json({ message, errors });
+    const details = err.issues.map((e) => ({ path: e.path, message: e.message }));
+    log.warn(
+      { err, validationErrors: details, statusCode },
+      `Client Error on ${req.method} ${req.path}: ${message}`,
+    );
+    return sendErrorResponse(res, statusCode, ErrorCode.VALIDATION_ERROR, message, details);
   }
 
   // --- Handle Custom Operational Errors ---
   if (err instanceof NotFoundError) {
     const statusCode = 404;
     log.warn({ err, statusCode }, `Client Error on ${req.method} ${req.path}: ${err.message}`);
-    return res.status(statusCode).json({ message: err.message });
+    return sendErrorResponse(res, statusCode, ErrorCode.NOT_FOUND, err.message);
   }
 
   if (err instanceof ValidationError) {
@@ -47,30 +88,66 @@ export const errorHandler = (err: Error, req: Request, res: Response, next: Next
       { err, validationErrors: err.validationErrors, statusCode },
       `Client Error on ${req.method} ${req.path}: ${err.message}`,
     );
-    return res.status(statusCode).json({ message: err.message, errors: err.validationErrors });
+    return sendErrorResponse(
+      res,
+      statusCode,
+      ErrorCode.VALIDATION_ERROR,
+      err.message,
+      err.validationErrors,
+    );
   }
 
   if (err instanceof UniqueConstraintError) {
     const statusCode = 409;
     log.warn({ err, statusCode }, `Client Error on ${req.method} ${req.path}: ${err.message}`);
-    return res.status(statusCode).json({ message: err.message }); // Use 409 Conflict for unique constraints
+    return sendErrorResponse(res, statusCode, ErrorCode.CONFLICT, err.message);
   }
 
   if (err instanceof ForeignKeyConstraintError) {
     const statusCode = 400;
     log.warn({ err, statusCode }, `Client Error on ${req.method} ${req.path}: ${err.message}`);
-    return res.status(statusCode).json({ message: err.message });
+    return sendErrorResponse(res, statusCode, ErrorCode.BAD_REQUEST, err.message);
   }
 
   // --- Handle Generic Client Errors (e.g., from express-jwt, or manual status setting) ---
-  let status = (err as any).status || (err as any).statusCode;
+  const errWithStatus = err as Error & { status?: number; statusCode?: number };
+  let status = errWithStatus.status || errWithStatus.statusCode;
   // Default UnauthorizedError to 401 if no status is present, a common case for express-jwt.
   if (err.name === 'UnauthorizedError' && !status) {
     status = 401;
   }
   if (status && status >= 400 && status < 500) {
-    log.warn({ err, statusCode: status }, `Client Error on ${req.method} ${req.path}: ${err.message}`);
-    return res.status(status).json({ message: err.message });
+    log.warn(
+      { err, statusCode: status },
+      `Client Error on ${req.method} ${req.path}: ${err.message}`,
+    );
+
+    // Map status codes to error codes
+    let errorCode: string;
+    switch (status) {
+      case 400:
+        errorCode = ErrorCode.BAD_REQUEST;
+        break;
+      case 401:
+        errorCode = ErrorCode.UNAUTHORIZED;
+        break;
+      case 403:
+        errorCode = ErrorCode.FORBIDDEN;
+        break;
+      case 404:
+        errorCode = ErrorCode.NOT_FOUND;
+        break;
+      case 409:
+        errorCode = ErrorCode.CONFLICT;
+        break;
+      case 429:
+        errorCode = ErrorCode.RATE_LIMITED;
+        break;
+      default:
+        errorCode = ErrorCode.BAD_REQUEST;
+    }
+
+    return sendErrorResponse(res, status, errorCode, err.message);
   }
 
   // --- Handle All Other (500-level) Errors ---
@@ -91,11 +168,23 @@ export const errorHandler = (err: Error, req: Request, res: Response, next: Next
 
   // In production, send a generic message to avoid leaking implementation details.
   if (process.env.NODE_ENV === 'production') {
-    return res.status(500).json({
-      message: `An unexpected server error occurred. Please reference error ID: ${errorId}`,
-    });
+    return sendErrorResponse(
+      res,
+      500,
+      ErrorCode.INTERNAL_ERROR,
+      `An unexpected server error occurred. Please reference error ID: ${errorId}`,
+      undefined,
+      { requestId: errorId },
+    );
   }
 
   // In non-production environments (dev, test, etc.), send more details for easier debugging.
-  return res.status(500).json({ message: err.message, stack: err.stack, errorId });
-};
+  return sendErrorResponse(
+    res,
+    500,
+    ErrorCode.INTERNAL_ERROR,
+    err.message,
+    { stack: err.stack },
+    { requestId: errorId },
+  );
+};

src/pages/MyDealsPage.test.tsx

@@ -1,7 +1,7 @@
 // src/pages/MyDealsPage.test.tsx
 import React from 'react';
 import { render, screen, waitFor } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
 import MyDealsPage from './MyDealsPage';
 import * as apiClient from '../services/apiClient';
 import type { WatchedItemDeal } from '../types';

src/pages/UserProfilePage.test.tsx

@@ -1,7 +1,7 @@
 // src/pages/UserProfilePage.test.tsx
 import React from 'react';
 import { render, screen, fireEvent, waitFor } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
 import UserProfilePage from './UserProfilePage';
 import * as apiClient from '../services/apiClient';
 import { UserProfile, Achievement, UserAchievement } from '../types';

src/pages/UserProfilePage.tsx

@@ -1,6 +1,6 @@
+// src/pages/UserProfilePage.tsx
 import React, { useState, useEffect, useRef } from 'react';
 import * as apiClient from '../services/apiClient';
-import type { UserProfile } from '../types';
 import { logger } from '../services/logger.client';
 import { notifySuccess, notifyError } from '../services/notificationService';
 import { AchievementsList } from '../components/AchievementsList';

src/pages/VoiceLabPage.tsx

@@ -15,47 +15,43 @@ export const VoiceLabPage: React.FC = () => {
   const [audioPlayer, setAudioPlayer] = useState<HTMLAudioElement | null>(null);
 
   // Debug log for rendering
-  console.log(
-    '[VoiceLabPage RENDER] audioPlayer state is:',
-    audioPlayer ? 'Present (Object)' : 'Null',
-  );
+  logger.debug({ hasAudioPlayer: !!audioPlayer }, '[VoiceLabPage] Render');
 
   const handleGenerateSpeech = async () => {
-    console.log('[VoiceLabPage] handleGenerateSpeech triggered');
+    logger.debug('[VoiceLabPage] handleGenerateSpeech triggered');
     if (!textToSpeak.trim()) {
       notifyError('Please enter some text to generate speech.');
       return;
     }
     setIsGeneratingSpeech(true);
     try {
-      console.log('[VoiceLabPage] Calling generateSpeechFromText...');
+      logger.debug('[VoiceLabPage] Calling generateSpeechFromText');
       const response = await generateSpeechFromText(textToSpeak);
       const base64Audio = await response.json(); // Extract the base64 audio string from the response
-      console.log('[VoiceLabPage] Response JSON received. Length:', base64Audio?.length);
+      logger.debug({ audioLength: base64Audio?.length }, '[VoiceLabPage] Response JSON received');
 
       if (base64Audio) {
         const audioSrc = `data:audio/mpeg;base64,${base64Audio}`;
-        console.log('[VoiceLabPage] creating new Audio()');
+        logger.debug('[VoiceLabPage] Creating new Audio()');
         const audio = new Audio(audioSrc);
-        console.log('[VoiceLabPage] Audio created:', audio);
+        logger.debug('[VoiceLabPage] Audio created');
 
-        console.log('[VoiceLabPage] calling setAudioPlayer...');
+        logger.debug('[VoiceLabPage] Calling setAudioPlayer');
         setAudioPlayer(audio);
 
-        console.log('[VoiceLabPage] calling audio.play()...');
+        logger.debug('[VoiceLabPage] Calling audio.play()');
         await audio.play();
-        console.log('[VoiceLabPage] audio.play() resolved');
+        logger.debug('[VoiceLabPage] audio.play() resolved');
       } else {
-        console.warn('[VoiceLabPage] base64Audio was falsy');
+        logger.warn('[VoiceLabPage] base64Audio was falsy');
         notifyError('The AI did not return any audio data.');
       }
     } catch (error) {
-      console.error('[VoiceLabPage] Error caught:', error);
+      logger.error({ err: error }, '[VoiceLabPage] Failed to generate speech');
       const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred.';
-      logger.error({ err: error }, 'Failed to generate speech:');
       notifyError(`Speech generation failed: ${errorMessage}`);
     } finally {
-      console.log('[VoiceLabPage] finally block - setting isGeneratingSpeech false');
+      logger.debug('[VoiceLabPage] finally block - setting isGeneratingSpeech false');
       setIsGeneratingSpeech(false);
     }
   };

src/pages/admin/ActivityLog.tsx

@@ -4,6 +4,7 @@ import { ActivityLogItem } from '../../types';
 import { UserProfile } from '../../types';
 import { formatDistanceToNow } from 'date-fns';
 import { useActivityLogQuery } from '../../hooks/queries/useActivityLogQuery';
+import { logger } from '../../services/logger.client';
 
 export type ActivityLogClickHandler = (log: ActivityLogItem) => void;
 
@@ -98,8 +99,9 @@ export const ActivityLog: React.FC<ActivityLogProps> = ({ userProfile, onLogClic
               {log.user_avatar_url ? (
                 (() => {
                   const altText = log.user_full_name || 'User Avatar';
-                  console.log(
-                    `[ActivityLog] Rendering avatar for log ${log.activity_log_id}. Alt: "${altText}"`,
+                  logger.debug(
+                    { activityLogId: log.activity_log_id, altText },
+                    '[ActivityLog] Rendering avatar',
                   );
                   return (
                     <img className="h-8 w-8 rounded-full" src={log.user_avatar_url} alt={altText} />

src/pages/admin/CorrectionsPage.tsx

@@ -1,7 +1,6 @@
 // src/pages/admin/CorrectionsPage.tsx
 import React from 'react';
 import { Link } from 'react-router-dom';
-import type { SuggestedCorrection, MasterGroceryItem, Category } from '../../types';
 import { LoadingSpinner } from '../../components/LoadingSpinner';
 import { ArrowPathIcon } from '../../components/icons/ArrowPathIcon';
 import { CorrectionRow } from './components/CorrectionRow';
@@ -18,15 +17,9 @@ export const CorrectionsPage: React.FC = () => {
     refetch: refetchCorrections,
   } = useSuggestedCorrectionsQuery();
 
-  const {
-    data: masterItems = [],
-    isLoading: isLoadingMasterItems,
-  } = useMasterItemsQuery();
+  const { data: masterItems = [], isLoading: isLoadingMasterItems } = useMasterItemsQuery();
 
-  const {
-    data: categories = [],
-    isLoading: isLoadingCategories,
-  } = useCategoriesQuery();
+  const { data: categories = [], isLoading: isLoadingCategories } = useCategoriesQuery();
 
   const isLoading = isLoadingCorrections || isLoadingMasterItems || isLoadingCategories;
   const error = correctionsError?.message || null;

src/pages/admin/components/AdminBrandManager.tsx

@@ -5,14 +5,15 @@ import { fetchAllBrands, uploadBrandLogo } from '../../../services/apiClient';
 import { Brand } from '../../../types';
 import { ErrorDisplay } from '../../../components/ErrorDisplay';
 import { useApiOnMount } from '../../../hooks/useApiOnMount';
+import { logger } from '../../../services/logger.client';
 
 export const AdminBrandManager: React.FC = () => {
   // Wrap the fetcher function in useCallback to prevent it from being recreated on every render.
   // The hook expects a function that returns a Promise<Response>, and it will handle
   // the JSON parsing and error checking internally.
   const fetchBrandsWrapper = useCallback(() => {
-    console.log(
-      'AdminBrandManager: The memoized fetchBrandsWrapper is being passed to useApiOnMount.',
+    logger.debug(
+      '[AdminBrandManager] The memoized fetchBrandsWrapper is being passed to useApiOnMount',
     );
     // This wrapper simply calls the API client function. The hook will manage the promise.
     return fetchAllBrands();
@@ -30,19 +31,22 @@ export const AdminBrandManager: React.FC = () => {
   // At render time, decide which data to display. If updatedBrands exists, it takes precedence.
   // Otherwise, fall back to the initial data from the hook. Default to an empty array.
   const brandsToRender = updatedBrands || initialBrands || [];
-  console.log('AdminBrandManager RENDER:', {
-    loading,
-    error: error?.message,
-    hasInitialBrands: !!initialBrands,
-    hasUpdatedBrands: !!updatedBrands,
-    brandsToRenderCount: brandsToRender.length,
-  });
+  logger.debug(
+    {
+      loading,
+      error: error?.message,
+      hasInitialBrands: !!initialBrands,
+      hasUpdatedBrands: !!updatedBrands,
+      brandsToRenderCount: brandsToRender.length,
+    },
+    '[AdminBrandManager] Render',
+  );
 
   // The file parameter is now optional to handle cases where the user cancels the file picker.
   const handleLogoUpload = async (brandId: number, file: File | undefined) => {
     if (!file) {
       // This check is now the single source of truth for a missing file.
-      console.log('AdminBrandManager: handleLogoUpload called with no file. Showing error toast.');
+      logger.debug('[AdminBrandManager] handleLogoUpload called with no file. Showing error toast');
       toast.error('Please select a file to upload.');
       return;
     }
@@ -61,11 +65,14 @@ export const AdminBrandManager: React.FC = () => {
 
     try {
       const response = await uploadBrandLogo(brandId, file);
-      console.log('AdminBrandManager: Logo upload response received.', {
-        ok: response.ok,
-        status: response.status,
-        statusText: response.statusText,
-      });
+      logger.debug(
+        {
+          ok: response.ok,
+          status: response.status,
+          statusText: response.statusText,
+        },
+        '[AdminBrandManager] Logo upload response received',
+      );
 
       // Check for a successful response before attempting to parse JSON.
       if (!response.ok) {
@@ -78,8 +85,9 @@ export const AdminBrandManager: React.FC = () => {
 
       // Optimistically update the UI by setting the updatedBrands state.
       // This update is based on the currently rendered list of brands.
-      console.log(
-        `AdminBrandManager: Optimistically updating brand ${brandId} with new logo: ${logoUrl}`,
+      logger.debug(
+        { brandId, logoUrl },
+        '[AdminBrandManager] Optimistically updating brand with new logo',
       );
       setUpdatedBrands(
         brandsToRender.map((brand) =>
@@ -93,12 +101,12 @@ export const AdminBrandManager: React.FC = () => {
   };
 
   if (loading) {
-    console.log('AdminBrandManager: Rendering the loading state.');
+    logger.debug('[AdminBrandManager] Rendering the loading state');
     return <div className="text-center p-4">Loading brands...</div>;
   }
 
   if (error) {
-    console.error(`AdminBrandManager: Rendering the error state. Error: ${error.message}`);
+    logger.error({ err: error }, '[AdminBrandManager] Rendering the error state');
     return <ErrorDisplay message={`Failed to load brands: ${error.message}`} />;
   }
 

src/pages/admin/components/CorrectionRow.test.tsx

@@ -2,7 +2,7 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import { screen, fireEvent, waitFor } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { CorrectionRow } from './CorrectionRow';
 import * as apiClient from '../../../services/apiClient';
 import {

src/pages/admin/components/ProfileManager.test.tsx

@@ -1,7 +1,7 @@
 // src/pages/admin/components/ProfileManager.test.tsx
 import React from 'react';
 import { render, screen, fireEvent, waitFor, cleanup, act } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, afterEach, type Mock, test } from 'vitest';
+import { describe, it, expect, vi, beforeEach, afterEach, type Mock } from 'vitest';
 import { ProfileManager } from './ProfileManager';
 import * as apiClient from '../../../services/apiClient';
 import { notifySuccess, notifyError } from '../../../services/notificationService';
@@ -272,7 +272,9 @@ describe('ProfileManager', () => {
 
       await waitFor(() => {
         expect(notifyError).toHaveBeenCalledWith('Cannot save profile, no user is logged in.');
-        expect(loggerSpy).toHaveBeenCalledWith('[handleProfileSave] Aborted: No user is logged in.');
+        expect(loggerSpy).toHaveBeenCalledWith(
+          '[handleProfileSave] Aborted: No user is logged in.',
+        );
       });
       expect(mockedApiClient.updateUserProfile).not.toHaveBeenCalled();
     });
@@ -974,11 +976,11 @@ describe('ProfileManager', () => {
     });
 
     it('should handle updating the user profile and address with empty strings', async () => {
-      mockedApiClient.updateUserProfile.mockImplementation(async (data) =>
-        new Response(JSON.stringify({ ...authenticatedProfile, ...data })),
+      mockedApiClient.updateUserProfile.mockImplementation(
+        async (data) => new Response(JSON.stringify({ ...authenticatedProfile, ...data })),
       );
-      mockedApiClient.updateUserAddress.mockImplementation(async (data) =>
-        new Response(JSON.stringify({ ...mockAddress, ...data })),
+      mockedApiClient.updateUserAddress.mockImplementation(
+        async (data) => new Response(JSON.stringify({ ...mockAddress, ...data })),
       );
 
       render(<ProfileManager {...defaultAuthenticatedProps} />);
@@ -1004,7 +1006,7 @@ describe('ProfileManager', () => {
           expect.objectContaining({ signal: expect.anything() }),
         );
         expect(mockOnProfileUpdate).toHaveBeenCalledWith(
-          expect.objectContaining({ full_name: '' })
+          expect.objectContaining({ full_name: '' }),
         );
         expect(notifySuccess).toHaveBeenCalledWith('Profile updated successfully!');
       });

src/providers/ApiProvider.test.tsx

@@ -1,7 +1,7 @@
 // src/providers/ApiProvider.test.tsx
 import React, { useContext } from 'react';
 import { render, screen } from '@testing-library/react';
-import { describe, it, expect, vi } from 'vitest';
+import { describe, it, expect } from 'vitest';
 import { ApiProvider } from './ApiProvider';
 import { ApiContext } from '../contexts/ApiContext';
 import * as apiClient from '../services/apiClient';
@@ -26,7 +26,7 @@ describe('ApiProvider & ApiContext', () => {
     render(
       <ApiProvider>
         <div data-testid="child">Child Content</div>
-      </ApiProvider>
+      </ApiProvider>,
     );
     expect(screen.getByTestId('child')).toBeInTheDocument();
     expect(screen.getByText('Child Content')).toBeInTheDocument();
@@ -36,7 +36,7 @@ describe('ApiProvider & ApiContext', () => {
     render(
       <ApiProvider>
         <TestConsumer />
-      </ApiProvider>
+      </ApiProvider>,
     );
     expect(screen.getByTestId('value-check')).toHaveTextContent('Matches apiClient');
   });
@@ -46,4 +46,4 @@ describe('ApiProvider & ApiContext', () => {
     render(<TestConsumer />);
     expect(screen.getByTestId('value-check')).toHaveTextContent('Matches apiClient');
   });
-});
+});

src/routes/admin.content.routes.test.ts

@@ -170,7 +170,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.getSuggestedCorrections).mockResolvedValue(mockCorrections);
       const response = await supertest(app).get('/api/admin/corrections');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockCorrections);
+      expect(response.body.data).toEqual(mockCorrections);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -179,7 +179,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       );
       const response = await supertest(app).get('/api/admin/corrections');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('POST /corrections/:id/approve should approve a correction', async () => {
@@ -187,7 +187,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.approveCorrection).mockResolvedValue(undefined);
       const response = await supertest(app).post(`/api/admin/corrections/${correctionId}/approve`);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ message: 'Correction approved successfully.' });
+      expect(response.body.data).toEqual({ message: 'Correction approved successfully.' });
       expect(vi.mocked(mockedDb.adminRepo.approveCorrection)).toHaveBeenCalledWith(
         correctionId,
         expect.anything(),
@@ -206,7 +206,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.rejectCorrection).mockResolvedValue(undefined);
       const response = await supertest(app).post(`/api/admin/corrections/${correctionId}/reject`);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ message: 'Correction rejected successfully.' });
+      expect(response.body.data).toEqual({ message: 'Correction rejected successfully.' });
     });
 
     it('POST /corrections/:id/reject should return 500 on DB error', async () => {
@@ -230,7 +230,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .put(`/api/admin/corrections/${correctionId}`)
         .send(requestBody);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUpdatedCorrection);
+      expect(response.body.data).toEqual(mockUpdatedCorrection);
     });
 
     it('PUT /corrections/:id should return 400 for invalid data', async () => {
@@ -248,7 +248,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .put('/api/admin/corrections/999')
         .send({ suggested_value: 'new value' });
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Correction with ID 999 not found');
+      expect(response.body.error.message).toBe('Correction with ID 999 not found');
     });
 
     it('PUT /corrections/:id should return 500 on a generic DB error', async () => {
@@ -259,7 +259,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .put('/api/admin/corrections/101')
         .send({ suggested_value: 'new value' });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Generic DB Error');
+      expect(response.body.error.message).toBe('Generic DB Error');
     });
   });
 
@@ -272,7 +272,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.getFlyersForReview).mockResolvedValue(mockFlyers);
       const response = await supertest(app).get('/api/admin/review/flyers');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyers);
+      expect(response.body.data).toEqual(mockFlyers);
       expect(vi.mocked(mockedDb.adminRepo.getFlyersForReview)).toHaveBeenCalledWith(
         expect.anything(),
       );
@@ -282,7 +282,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.getFlyersForReview).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/review/flyers');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -292,7 +292,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.getApplicationStats).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/stats');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -302,14 +302,14 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.flyerRepo.getAllBrands).mockResolvedValue(mockBrands);
       const response = await supertest(app).get('/api/admin/brands');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockBrands);
+      expect(response.body.data).toEqual(mockBrands);
     });
 
     it('GET /brands should return 500 on DB error', async () => {
       vi.mocked(mockedDb.flyerRepo.getAllBrands).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/brands');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('POST /brands/:id/logo should upload a logo and update the brand', async () => {
@@ -319,7 +319,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .post(`/api/admin/brands/${brandId}/logo`)
         .attach('logoImage', Buffer.from('dummy-logo-content'), 'test-logo.png');
       expect(response.status).toBe(200);
-      expect(response.body.message).toBe('Brand logo updated successfully.');
+      expect(response.body.data.message).toBe('Brand logo updated successfully.');
       expect(vi.mocked(mockedDb.adminRepo.updateBrandLogo)).toHaveBeenCalledWith(
         brandId,
         expect.stringContaining('/flyer-images/'),
@@ -339,7 +339,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
     it('POST /brands/:id/logo should return 400 if no file is uploaded', async () => {
       const response = await supertest(app).post('/api/admin/brands/55/logo');
       expect(response.status).toBe(400);
-      expect(response.body.message).toMatch(
+      expect(response.body.error.message).toMatch(
         /Logo image file is required|The request data is invalid|Logo image file is missing./,
       );
     });
@@ -367,7 +367,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .attach('logoImage', Buffer.from('this is not an image'), 'document.txt');
       expect(response.status).toBe(400);
       // This message comes from the handleMulterError middleware for the imageFileFilter
-      expect(response.body.message).toBe('Only image files are allowed!');
+      expect(response.body.error.message).toBe('Only image files are allowed!');
     });
 
     it('POST /brands/:id/logo should return 400 for an invalid brand ID', async () => {
@@ -414,7 +414,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .put(`/api/admin/recipes/${recipeId}/status`)
         .send(requestBody);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUpdatedRecipe);
+      expect(response.body.data).toEqual(mockUpdatedRecipe);
     });
 
     it('PUT /recipes/:id/status should return 400 for an invalid status value', async () => {
@@ -448,7 +448,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
         .put(`/api/admin/comments/${commentId}/status`)
         .send(requestBody);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUpdatedComment);
+      expect(response.body.data).toEqual(mockUpdatedComment);
     });
 
     it('PUT /comments/:id/status should return 400 for an invalid status value', async () => {
@@ -485,7 +485,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       vi.mocked(mockedDb.adminRepo.getUnmatchedFlyerItems).mockResolvedValue(mockUnmatchedItems);
       const response = await supertest(app).get('/api/admin/unmatched-items');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUnmatchedItems);
+      expect(response.body.data).toEqual(mockUnmatchedItems);
     });
 
     it('GET /unmatched-items should return 500 on DB error', async () => {
@@ -515,23 +515,21 @@ describe('Admin Content Management Routes (/api/admin)', () => {
       );
       const response = await supertest(app).delete(`/api/admin/flyers/${flyerId}`);
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Flyer with ID 999 not found.');
+      expect(response.body.error.message).toBe('Flyer with ID 999 not found.');
     });
 
     it('DELETE /flyers/:flyerId should return 500 on a generic DB error', async () => {
       const flyerId = 42;
-      vi.mocked(mockedDb.flyerRepo.deleteFlyer).mockRejectedValue(
-        new Error('Generic DB Error'),
-      );
+      vi.mocked(mockedDb.flyerRepo.deleteFlyer).mockRejectedValue(new Error('Generic DB Error'));
       const response = await supertest(app).delete(`/api/admin/flyers/${flyerId}`);
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Generic DB Error');
+      expect(response.body.error.message).toBe('Generic DB Error');
     });
 
     it('DELETE /flyers/:flyerId should return 400 for an invalid flyerId', async () => {
       const response = await supertest(app).delete('/api/admin/flyers/abc');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/Expected number, received nan/i);
+      expect(response.body.error.details[0].message).toMatch(/Expected number, received nan/i);
     });
   });
 });

src/routes/admin.jobs.routes.test.ts

@@ -108,7 +108,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       // Use the instance method mock
       const response = await supertest(app).post('/api/admin/trigger/daily-deal-check');
       expect(response.status).toBe(202);
-      expect(response.body.message).toContain('Daily deal check job has been triggered');
+      expect(response.body.data.message).toContain('Daily deal check job has been triggered');
       expect(backgroundJobService.runDailyDealCheck).toHaveBeenCalledTimes(1);
     });
 
@@ -118,7 +118,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       });
       const response = await supertest(app).post('/api/admin/trigger/daily-deal-check');
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Job runner failed');
+      expect(response.body.error.message).toContain('Job runner failed');
     });
   });
 
@@ -128,7 +128,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       vi.mocked(analyticsQueue.add).mockResolvedValue(mockJob);
       const response = await supertest(app).post('/api/admin/trigger/failing-job');
       expect(response.status).toBe(202);
-      expect(response.body.message).toContain('Failing test job has been enqueued');
+      expect(response.body.data.message).toContain('Failing test job has been enqueued');
       expect(analyticsQueue.add).toHaveBeenCalledWith('generate-daily-report', {
         reportDate: 'FAIL',
       });
@@ -138,23 +138,29 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       vi.mocked(analyticsQueue.add).mockRejectedValue(new Error('Queue is down'));
       const response = await supertest(app).post('/api/admin/trigger/failing-job');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Queue is down');
+      expect(response.body.error.message).toBe('Queue is down');
     });
   });
 
   describe('POST /trigger/analytics-report', () => {
     it('should trigger the analytics report job and return 202 Accepted', async () => {
-      vi.mocked(backgroundJobService.triggerAnalyticsReport).mockResolvedValue('manual-report-job-123');
+      vi.mocked(backgroundJobService.triggerAnalyticsReport).mockResolvedValue(
+        'manual-report-job-123',
+      );
 
       const response = await supertest(app).post('/api/admin/trigger/analytics-report');
 
       expect(response.status).toBe(202);
-      expect(response.body.message).toContain('Analytics report generation job has been enqueued');
+      expect(response.body.data.message).toContain(
+        'Analytics report generation job has been enqueued',
+      );
       expect(backgroundJobService.triggerAnalyticsReport).toHaveBeenCalledTimes(1);
     });
 
     it('should return 500 if enqueuing the analytics job fails', async () => {
-      vi.mocked(backgroundJobService.triggerAnalyticsReport).mockRejectedValue(new Error('Queue error'));
+      vi.mocked(backgroundJobService.triggerAnalyticsReport).mockRejectedValue(
+        new Error('Queue error'),
+      );
       const response = await supertest(app).post('/api/admin/trigger/analytics-report');
       expect(response.status).toBe(500);
     });
@@ -162,17 +168,21 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
 
   describe('POST /trigger/weekly-analytics', () => {
     it('should trigger the weekly analytics job and return 202 Accepted', async () => {
-      vi.mocked(backgroundJobService.triggerWeeklyAnalyticsReport).mockResolvedValue('manual-weekly-report-job-123');
+      vi.mocked(backgroundJobService.triggerWeeklyAnalyticsReport).mockResolvedValue(
+        'manual-weekly-report-job-123',
+      );
 
       const response = await supertest(app).post('/api/admin/trigger/weekly-analytics');
 
       expect(response.status).toBe(202);
-      expect(response.body.message).toContain('Successfully enqueued weekly analytics job');
+      expect(response.body.data.message).toContain('Successfully enqueued weekly analytics job');
       expect(backgroundJobService.triggerWeeklyAnalyticsReport).toHaveBeenCalledTimes(1);
     });
 
     it('should return 500 if enqueuing the weekly analytics job fails', async () => {
-      vi.mocked(backgroundJobService.triggerWeeklyAnalyticsReport).mockRejectedValue(new Error('Queue error'));
+      vi.mocked(backgroundJobService.triggerWeeklyAnalyticsReport).mockRejectedValue(
+        new Error('Queue error'),
+      );
       const response = await supertest(app).post('/api/admin/trigger/weekly-analytics');
       expect(response.status).toBe(500);
     });
@@ -185,7 +195,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       vi.mocked(cleanupQueue.add).mockResolvedValue(mockJob);
       const response = await supertest(app).post(`/api/admin/flyers/${flyerId}/cleanup`);
       expect(response.status).toBe(202);
-      expect(response.body.message).toBe(
+      expect(response.body.data.message).toBe(
         `File cleanup job for flyer ID ${flyerId} has been enqueued.`,
       );
       expect(cleanupQueue.add).toHaveBeenCalledWith('cleanup-flyer-files', { flyerId });
@@ -196,13 +206,13 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       vi.mocked(cleanupQueue.add).mockRejectedValue(new Error('Queue is down'));
       const response = await supertest(app).post(`/api/admin/flyers/${flyerId}/cleanup`);
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Queue is down');
+      expect(response.body.error.message).toBe('Queue is down');
     });
 
     it('should return 400 for an invalid flyerId', async () => {
       const response = await supertest(app).post('/api/admin/flyers/abc/cleanup');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/Expected number, received nan/i);
+      expect(response.body.error.details[0].message).toMatch(/Expected number, received nan/i);
     });
   });
 
@@ -224,7 +234,9 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body.message).toBe(`Job ${jobId} has been successfully marked for retry.`);
+      expect(response.body.data.message).toBe(
+        `Job ${jobId} has been successfully marked for retry.`,
+      );
       expect(mockJob.retry).toHaveBeenCalledTimes(1);
     });
 
@@ -244,7 +256,9 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       const response = await supertest(app).post(`/api/admin/jobs/${queueName}/${jobId}/retry`);
 
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe(`Job with ID '${jobId}' not found in queue '${queueName}'.`);
+      expect(response.body.error.message).toBe(
+        `Job with ID '${jobId}' not found in queue '${queueName}'.`,
+      );
     });
 
     it('should return 404 if the job ID is not found in the queue', async () => {
@@ -253,7 +267,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
         `/api/admin/jobs/${queueName}/not-found-job/retry`,
       );
       expect(response.status).toBe(404);
-      expect(response.body.message).toContain('not found in queue');
+      expect(response.body.error.message).toContain('not found in queue');
     });
 
     it('should return 400 if the job is not in a failed state', async () => {
@@ -267,7 +281,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       const response = await supertest(app).post(`/api/admin/jobs/${queueName}/${jobId}/retry`);
 
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe(
+      expect(response.body.error.message).toBe(
         "Job is not in a 'failed' state. Current state: completed.",
       ); // This is now handled by the errorHandler
       expect(mockJob.retry).not.toHaveBeenCalled();
@@ -284,7 +298,7 @@ describe('Admin Job Trigger Routes (/api/admin/trigger)', () => {
       const response = await supertest(app).post(`/api/admin/jobs/${queueName}/${jobId}/retry`);
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Cannot retry job');
+      expect(response.body.error.message).toContain('Cannot retry job');
     });
 
     it('should return 400 for an invalid queueName or jobId', async () => {

src/routes/admin.monitoring.routes.test.ts

@@ -1,5 +1,5 @@
 // src/routes/admin.monitoring.routes.test.ts
-import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
 import supertest from 'supertest';
 import type { Request, Response, NextFunction } from 'express';
 import { createMockUserProfile, createMockActivityLogItem } from '../tests/utils/mockFactories';
@@ -133,7 +133,7 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
       const response = await supertest(app).get('/api/admin/activity-log');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockLogs);
+      expect(response.body.data).toEqual(mockLogs);
       expect(adminRepo.getActivityLog).toHaveBeenCalledWith(50, 0, expect.anything());
     });
 
@@ -148,15 +148,15 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
     it('should return 400 for invalid limit and offset query parameters', async () => {
       const response = await supertest(app).get('/api/admin/activity-log?limit=abc&offset=-1');
       expect(response.status).toBe(400);
-      expect(response.body.errors).toBeDefined();
-      expect(response.body.errors.length).toBe(2); // Both limit and offset are invalid
+      expect(response.body.error.details).toBeDefined();
+      expect(response.body.error.details.length).toBe(2); // Both limit and offset are invalid
     });
 
     it('should return 500 if fetching activity log fails', async () => {
       vi.mocked(adminRepo.getActivityLog).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/activity-log');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -177,7 +177,7 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body).toEqual([
+      expect(response.body.data).toEqual([
         { name: 'flyer-processing', isRunning: true },
         { name: 'email-sending', isRunning: true },
         { name: 'analytics-reporting', isRunning: false },
@@ -190,7 +190,7 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
       vi.mocked(monitoringService.getWorkerStatuses).mockRejectedValue(new Error('Worker Error'));
       const response = await supertest(app).get('/api/admin/workers/status');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Worker Error');
+      expect(response.body.error.message).toBe('Worker Error');
     });
   });
 
@@ -226,7 +226,7 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body).toEqual([
+      expect(response.body.data).toEqual([
         {
           name: 'flyer-processing',
           counts: { waiting: 5, active: 1, completed: 100, failed: 2, delayed: 0, paused: 0 },
@@ -251,13 +251,11 @@ describe('Admin Monitoring Routes (/api/admin)', () => {
     });
 
     it('should return 500 if fetching queue counts fails', async () => {
-      vi.mocked(monitoringService.getQueueStatuses).mockRejectedValue(
-        new Error('Redis is down'),
-      );
+      vi.mocked(monitoringService.getQueueStatuses).mockRejectedValue(new Error('Redis is down'));
 
       const response = await supertest(app).get('/api/admin/queues/status');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Redis is down');
+      expect(response.body.error.message).toBe('Redis is down');
     });
   });
 });

src/routes/admin.routes.ts

@@ -2,18 +2,15 @@
 import { Router, NextFunction, Request, Response } from 'express';
 import passport from './passport.routes';
 import { isAdmin } from './passport.routes'; // Correctly imported
-import multer from 'multer';
 import { z } from 'zod';
 
 import * as db from '../services/db/index.db';
 import type { UserProfile } from '../types';
 import { geocodingService } from '../services/geocodingService.server';
+import { cacheService } from '../services/cacheService.server';
 import { requireFileUpload } from '../middleware/fileUpload.middleware'; // This was a duplicate, fixed.
-import {
-  createUploadMiddleware,
-  handleMulterError,
-} from '../middleware/multer.middleware';
-import { NotFoundError, ValidationError } from '../services/db/errors.db';
+import { createUploadMiddleware, handleMulterError } from '../middleware/multer.middleware';
+import { ValidationError } from '../services/db/errors.db';
 import { validateRequest } from '../middleware/validation.middleware';
 
 // --- Bull Board (Job Queue UI) Imports ---
@@ -21,15 +18,14 @@ import { createBullBoard } from '@bull-board/api';
 import { BullMQAdapter } from '@bull-board/api/bullMQAdapter';
 import { ExpressAdapter } from '@bull-board/express';
 import { backgroundJobService } from '../services/backgroundJobService';
-import { flyerQueue, emailQueue, analyticsQueue, cleanupQueue, weeklyAnalyticsQueue } from '../services/queueService.server';
-import { getSimpleWeekAndYear } from '../utils/dateUtils';
 import {
-  requiredString,
-  numericIdParam,
-  uuidParamSchema,
-  optionalNumeric,
-  optionalString,
-} from '../utils/zodUtils';
+  flyerQueue,
+  emailQueue,
+  analyticsQueue,
+  cleanupQueue,
+  weeklyAnalyticsQueue,
+} from '../services/queueService.server';
+import { numericIdParam, uuidParamSchema, optionalNumeric } from '../utils/zodUtils';
 // Removed: import { logger } from '../services/logger.server';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { monitoringService } from '../services/monitoringService.server';
@@ -37,6 +33,7 @@ import { userService } from '../services/userService';
 import { cleanupUploadedFile } from '../utils/fileUtils';
 import { brandService } from '../services/brandService';
 import { adminTriggerLimiter, adminUploadLimiter } from '../config/rateLimiters';
+import { sendSuccess, sendNoContent } from '../utils/apiResponse';
 
 const updateCorrectionSchema = numericIdParam('id').extend({
   body: z.object({
@@ -125,7 +122,7 @@ router.use(passport.authenticate('jwt', { session: false }), isAdmin);
 router.get('/corrections', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
   try {
     const corrections = await db.adminRepo.getSuggestedCorrections(req.log);
-    res.json(corrections);
+    sendSuccess(res, corrections);
   } catch (error) {
     req.log.error({ error }, 'Error fetching suggested corrections');
     next(error);
@@ -136,8 +133,11 @@ router.get('/review/flyers', validateRequest(emptySchema), async (req, res, next
   try {
     req.log.debug('Fetching flyers for review via adminRepo');
     const flyers = await db.adminRepo.getFlyersForReview(req.log);
-    req.log.info({ count: Array.isArray(flyers) ? flyers.length : 'unknown' }, 'Successfully fetched flyers for review');
-    res.json(flyers);
+    req.log.info(
+      { count: Array.isArray(flyers) ? flyers.length : 'unknown' },
+      'Successfully fetched flyers for review',
+    );
+    sendSuccess(res, flyers);
   } catch (error) {
     req.log.error({ error }, 'Error fetching flyers for review');
     next(error);
@@ -147,7 +147,7 @@ router.get('/review/flyers', validateRequest(emptySchema), async (req, res, next
 router.get('/brands', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
   try {
     const brands = await db.flyerRepo.getAllBrands(req.log);
-    res.json(brands);
+    sendSuccess(res, brands);
   } catch (error) {
     req.log.error({ error }, 'Error fetching brands');
     next(error);
@@ -157,7 +157,7 @@ router.get('/brands', validateRequest(emptySchema), async (req, res, next: NextF
 router.get('/stats', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
   try {
     const stats = await db.adminRepo.getApplicationStats(req.log);
-    res.json(stats);
+    sendSuccess(res, stats);
   } catch (error) {
     req.log.error({ error }, 'Error fetching application stats');
     next(error);
@@ -167,7 +167,7 @@ router.get('/stats', validateRequest(emptySchema), async (req, res, next: NextFu
 router.get('/stats/daily', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
   try {
     const dailyStats = await db.adminRepo.getDailyStatsForLast30Days(req.log);
-    res.json(dailyStats);
+    sendSuccess(res, dailyStats);
   } catch (error) {
     req.log.error({ error }, 'Error fetching daily stats');
     next(error);
@@ -182,7 +182,7 @@ router.post(
     const { params } = req as unknown as z.infer<ReturnType<typeof numericIdParam>>;
     try {
       await db.adminRepo.approveCorrection(params.id, req.log); // params.id is now safely typed as number
-      res.status(200).json({ message: 'Correction approved successfully.' });
+      sendSuccess(res, { message: 'Correction approved successfully.' });
     } catch (error) {
       req.log.error({ error }, 'Error approving correction');
       next(error);
@@ -198,7 +198,7 @@ router.post(
     const { params } = req as unknown as z.infer<ReturnType<typeof numericIdParam>>;
     try {
       await db.adminRepo.rejectCorrection(params.id, req.log); // params.id is now safely typed as number
-      res.status(200).json({ message: 'Correction rejected successfully.' });
+      sendSuccess(res, { message: 'Correction rejected successfully.' });
     } catch (error) {
       req.log.error({ error }, 'Error rejecting correction');
       next(error);
@@ -218,7 +218,7 @@ router.put(
         body.suggested_value,
         req.log,
       );
-      res.status(200).json(updatedCorrection);
+      sendSuccess(res, updatedCorrection);
     } catch (error) {
       req.log.error({ error }, 'Error updating suggested correction');
       next(error);
@@ -234,7 +234,7 @@ router.put(
     const { params, body } = req as unknown as z.infer<typeof updateRecipeStatusSchema>;
     try {
       const updatedRecipe = await db.adminRepo.updateRecipeStatus(params.id, body.status, req.log); // This is still a standalone function in admin.db.ts
-      res.status(200).json(updatedRecipe);
+      sendSuccess(res, updatedRecipe);
     } catch (error) {
       req.log.error({ error }, 'Error updating recipe status');
       next(error); // Pass all errors to the central error handler
@@ -259,8 +259,11 @@ router.post(
 
       const logoUrl = await brandService.updateBrandLogo(params.id, req.file, req.log);
 
-      req.log.info({ brandId: params.id, logoUrl }, `Brand logo updated for brand ID: ${params.id}`);
-      res.status(200).json({ message: 'Brand logo updated successfully.', logoUrl });
+      req.log.info(
+        { brandId: params.id, logoUrl },
+        `Brand logo updated for brand ID: ${params.id}`,
+      );
+      sendSuccess(res, { message: 'Brand logo updated successfully.', logoUrl });
     } catch (error) {
       // If an error occurs after the file has been uploaded (e.g., DB error),
       // we must clean up the orphaned file from the disk.
@@ -271,15 +274,19 @@ router.post(
   },
 );
 
-router.get('/unmatched-items', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
-  try {
-    const items = await db.adminRepo.getUnmatchedFlyerItems(req.log);
-    res.json(items);
-  } catch (error) {
-    req.log.error({ error }, 'Error fetching unmatched items');
-    next(error);
-  }
-});
+router.get(
+  '/unmatched-items',
+  validateRequest(emptySchema),
+  async (req, res, next: NextFunction) => {
+    try {
+      const items = await db.adminRepo.getUnmatchedFlyerItems(req.log);
+      sendSuccess(res, items);
+    } catch (error) {
+      req.log.error({ error }, 'Error fetching unmatched items');
+      next(error);
+    }
+  },
+);
 
 /**
  * DELETE /api/admin/recipes/:recipeId - Admin endpoint to delete any recipe.
@@ -294,7 +301,7 @@ router.delete(
     try {
       // The isAdmin flag bypasses the ownership check in the repository method.
       await db.recipeRepo.deleteRecipe(params.recipeId, userProfile.user.user_id, true, req.log);
-      res.status(204).send();
+      sendNoContent(res);
     } catch (error: unknown) {
       req.log.error({ error }, 'Error deleting recipe');
       next(error);
@@ -313,7 +320,7 @@ router.delete(
     const { params } = req as unknown as z.infer<ReturnType<typeof numericIdParam>>;
     try {
       await db.flyerRepo.deleteFlyer(params.flyerId, req.log);
-      res.status(204).send();
+      sendNoContent(res);
     } catch (error: unknown) {
       req.log.error({ error }, 'Error deleting flyer');
       next(error);
@@ -333,7 +340,7 @@ router.put(
         body.status,
         req.log,
       ); // This is still a standalone function in admin.db.ts
-      res.status(200).json(updatedComment);
+      sendSuccess(res, updatedComment);
     } catch (error: unknown) {
       req.log.error({ error }, 'Error updating comment status');
       next(error);
@@ -344,7 +351,7 @@ router.put(
 router.get('/users', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
   try {
     const users = await db.adminRepo.getAllUsers(req.log);
-    res.json(users);
+    sendSuccess(res, users);
   } catch (error) {
     req.log.error({ error }, 'Error fetching users');
     next(error);
@@ -361,7 +368,7 @@ router.get(
 
     try {
       const logs = await db.adminRepo.getActivityLog(limit!, offset!, req.log);
-      res.json(logs);
+      sendSuccess(res, logs);
     } catch (error) {
       req.log.error({ error }, 'Error fetching activity log');
       next(error);
@@ -377,7 +384,7 @@ router.get(
     const { params } = req as unknown as z.infer<ReturnType<typeof uuidParamSchema>>;
     try {
       const user = await db.userRepo.findUserProfileById(params.id, req.log);
-      res.json(user);
+      sendSuccess(res, user);
     } catch (error) {
       req.log.error({ error }, 'Error fetching user profile');
       next(error);
@@ -393,7 +400,7 @@ router.put(
     const { params, body } = req as unknown as z.infer<typeof updateUserRoleSchema>;
     try {
       const updatedUser = await db.adminRepo.updateUserRole(params.id, body.role, req.log);
-      res.json(updatedUser);
+      sendSuccess(res, updatedUser);
     } catch (error) {
       req.log.error({ error }, `Error updating user ${params.id}:`);
       next(error);
@@ -410,7 +417,7 @@ router.delete(
     const { params } = req as unknown as z.infer<ReturnType<typeof uuidParamSchema>>;
     try {
       await userService.deleteUserAsAdmin(userProfile.user.user_id, params.id, req.log);
-      res.status(204).send();
+      sendNoContent(res);
     } catch (error) {
       req.log.error({ error }, 'Error deleting user');
       next(error);
@@ -436,10 +443,14 @@ router.post(
       // We call the function but don't wait for it to finish (no `await`).
       // This is a "fire-and-forget" operation from the client's perspective.
       backgroundJobService.runDailyDealCheck();
-      res.status(202).json({
-        message:
-          'Daily deal check job has been triggered successfully. It will run in the background.',
-      });
+      sendSuccess(
+        res,
+        {
+          message:
+            'Daily deal check job has been triggered successfully. It will run in the background.',
+        },
+        202,
+      );
     } catch (error) {
       req.log.error({ error }, '[Admin] Failed to trigger daily deal check job.');
       next(error);
@@ -463,9 +474,13 @@ router.post(
 
     try {
       const jobId = await backgroundJobService.triggerAnalyticsReport();
-      res.status(202).json({
-        message: `Analytics report generation job has been enqueued successfully. Job ID: ${jobId}`,
-      });
+      sendSuccess(
+        res,
+        {
+          message: `Analytics report generation job has been enqueued successfully. Job ID: ${jobId}`,
+        },
+        202,
+      );
     } catch (error) {
       req.log.error({ error }, '[Admin] Failed to enqueue analytics report job.');
       next(error);
@@ -492,9 +507,11 @@ router.post(
     // Enqueue the cleanup job. The worker will handle the file deletion.
     try {
       await cleanupQueue.add('cleanup-flyer-files', { flyerId: params.flyerId });
-      res
-        .status(202)
-        .json({ message: `File cleanup job for flyer ID ${params.flyerId} has been enqueued.` });
+      sendSuccess(
+        res,
+        { message: `File cleanup job for flyer ID ${params.flyerId} has been enqueued.` },
+        202,
+      );
     } catch (error) {
       req.log.error({ error }, 'Error enqueuing cleanup job');
       next(error);
@@ -511,22 +528,24 @@ router.post(
   adminTriggerLimiter,
   validateRequest(emptySchema),
   async (req: Request, res: Response, next: NextFunction) => {
-  const userProfile = req.user as UserProfile;
-  req.log.info(
-    `[Admin] Manual trigger for a failing job received from user: ${userProfile.user.user_id}`,
-  );
+    const userProfile = req.user as UserProfile;
+    req.log.info(
+      `[Admin] Manual trigger for a failing job received from user: ${userProfile.user.user_id}`,
+    );
 
-  try {
-    // Add a job with a special 'forceFail' flag that the worker will recognize.
-    const job = await analyticsQueue.add('generate-daily-report', { reportDate: 'FAIL' });
-    res
-      .status(202)
-      .json({ message: `Failing test job has been enqueued successfully. Job ID: ${job.id}` });
-  } catch (error) {
-    req.log.error({ error }, 'Error enqueuing failing job');
-    next(error);
-  }
-}
+    try {
+      // Add a job with a special 'forceFail' flag that the worker will recognize.
+      const job = await analyticsQueue.add('generate-daily-report', { reportDate: 'FAIL' });
+      sendSuccess(
+        res,
+        { message: `Failing test job has been enqueued successfully. Job ID: ${job.id}` },
+        202,
+      );
+    } catch (error) {
+      req.log.error({ error }, 'Error enqueuing failing job');
+      next(error);
+    }
+  },
 );
 
 /**
@@ -545,7 +564,7 @@ router.post(
 
     try {
       const keysDeleted = await geocodingService.clearGeocodeCache(req.log);
-      res.status(200).json({
+      sendSuccess(res, {
         message: `Successfully cleared the geocode cache. ${keysDeleted} keys were removed.`,
       });
     } catch (error) {
@@ -559,29 +578,37 @@ router.post(
  * GET /api/admin/workers/status - Get the current running status of all BullMQ workers.
  * This is useful for a system health dashboard to see if any workers have crashed.
  */
-router.get('/workers/status', validateRequest(emptySchema), async (req: Request, res: Response, next: NextFunction) => {
-  try {
-    const workerStatuses = await monitoringService.getWorkerStatuses();
-    res.json(workerStatuses);
-  } catch (error) {
-    req.log.error({ error }, 'Error fetching worker statuses');
-    next(error);
-  }
-});
+router.get(
+  '/workers/status',
+  validateRequest(emptySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    try {
+      const workerStatuses = await monitoringService.getWorkerStatuses();
+      sendSuccess(res, workerStatuses);
+    } catch (error) {
+      req.log.error({ error }, 'Error fetching worker statuses');
+      next(error);
+    }
+  },
+);
 
 /**
  * GET /api/admin/queues/status - Get job counts for all BullMQ queues.
  * This is useful for monitoring the health and backlog of background jobs.
  */
-router.get('/queues/status', validateRequest(emptySchema), async (req: Request, res: Response, next: NextFunction) => {
-  try {
-    const queueStatuses = await monitoringService.getQueueStatuses();
-    res.json(queueStatuses);
-  } catch (error) {
-    req.log.error({ error }, 'Error fetching queue statuses');
-    next(error);
-  }
-});
+router.get(
+  '/queues/status',
+  validateRequest(emptySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    try {
+      const queueStatuses = await monitoringService.getQueueStatuses();
+      sendSuccess(res, queueStatuses);
+    } catch (error) {
+      req.log.error({ error }, 'Error fetching queue statuses');
+      next(error);
+    }
+  },
+);
 
 /**
  * POST /api/admin/jobs/:queueName/:jobId/retry - Retries a specific failed job.
@@ -597,12 +624,8 @@ router.post(
     } = req as unknown as z.infer<typeof jobRetrySchema>;
 
     try {
-      await monitoringService.retryFailedJob(
-        queueName,
-        jobId,
-        userProfile.user.user_id,
-      );
-      res.status(200).json({ message: `Job ${jobId} has been successfully marked for retry.` });
+      await monitoringService.retryFailedJob(queueName, jobId, userProfile.user.user_id);
+      sendSuccess(res, { message: `Job ${jobId} has been successfully marked for retry.` });
     } catch (error) {
       req.log.error({ error }, 'Error retrying job');
       next(error);
@@ -625,9 +648,7 @@ router.post(
 
     try {
       const jobId = await backgroundJobService.triggerWeeklyAnalyticsReport();
-      res
-        .status(202)
-        .json({ message: 'Successfully enqueued weekly analytics job.', jobId });
+      sendSuccess(res, { message: 'Successfully enqueued weekly analytics job.', jobId }, 202);
     } catch (error) {
       req.log.error({ error }, 'Error enqueuing weekly analytics job');
       next(error);
@@ -635,8 +656,43 @@ router.post(
   },
 );
 
+/**
+ * POST /api/admin/system/clear-cache - Clears the application data cache.
+ * Clears cached flyers, brands, and stats data from Redis.
+ * Requires admin privileges.
+ */
+router.post(
+  '/system/clear-cache',
+  adminTriggerLimiter,
+  validateRequest(emptySchema),
+  async (req: Request, res: Response, next: NextFunction) => {
+    const userProfile = req.user as UserProfile;
+    req.log.info(`[Admin] Manual cache clear received from user: ${userProfile.user.user_id}`);
+
+    try {
+      const [flyersDeleted, brandsDeleted, statsDeleted] = await Promise.all([
+        cacheService.invalidateFlyers(req.log),
+        cacheService.invalidateBrands(req.log),
+        cacheService.invalidateStats(req.log),
+      ]);
+
+      const totalDeleted = flyersDeleted + brandsDeleted + statsDeleted;
+      sendSuccess(res, {
+        message: `Successfully cleared the application cache. ${totalDeleted} keys were removed.`,
+        details: {
+          flyers: flyersDeleted,
+          brands: brandsDeleted,
+          stats: statsDeleted,
+        },
+      });
+    } catch (error) {
+      req.log.error({ error }, '[Admin] Failed to clear application cache.');
+      next(error);
+    }
+  },
+);
+
 /* Catches errors from multer (e.g., file size, file filter) */
 router.use(handleMulterError);
 
-
 export default router;

src/routes/admin.stats.routes.test.ts

@@ -90,14 +90,14 @@ describe('Admin Stats Routes (/api/admin/stats)', () => {
       vi.mocked(adminRepo.getApplicationStats).mockResolvedValue(mockStats);
       const response = await supertest(app).get('/api/admin/stats');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockStats);
+      expect(response.body.data).toEqual(mockStats);
     });
 
     it('should return 500 if the database call fails', async () => {
       vi.mocked(adminRepo.getApplicationStats).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/stats');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -110,14 +110,14 @@ describe('Admin Stats Routes (/api/admin/stats)', () => {
       vi.mocked(adminRepo.getDailyStatsForLast30Days).mockResolvedValue(mockDailyStats);
       const response = await supertest(app).get('/api/admin/stats/daily');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockDailyStats);
+      expect(response.body.data).toEqual(mockDailyStats);
     });
 
     it('should return 500 if the database call fails', async () => {
       vi.mocked(adminRepo.getDailyStatsForLast30Days).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/admin/stats/daily');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 });

src/routes/admin.system.routes.test.ts

@@ -88,14 +88,14 @@ describe('Admin System Routes (/api/admin/system)', () => {
       vi.mocked(geocodingService.clearGeocodeCache).mockResolvedValue(10);
       const response = await supertest(app).post('/api/admin/system/clear-geocode-cache');
       expect(response.status).toBe(200);
-      expect(response.body.message).toContain('10 keys were removed');
+      expect(response.body.data.message).toContain('10 keys were removed');
     });
 
     it('should return 500 if clearing the cache fails', async () => {
       vi.mocked(geocodingService.clearGeocodeCache).mockRejectedValue(new Error('Redis is down'));
       const response = await supertest(app).post('/api/admin/system/clear-geocode-cache');
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Redis is down');
+      expect(response.body.error.message).toContain('Redis is down');
     });
   });
 });

src/routes/admin.users.routes.test.ts

@@ -104,7 +104,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
       vi.mocked(adminRepo.getAllUsers).mockResolvedValue(mockUsers);
       const response = await supertest(app).get('/api/admin/users');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUsers);
+      expect(response.body.data).toEqual(mockUsers);
       expect(adminRepo.getAllUsers).toHaveBeenCalledTimes(1);
     });
 
@@ -122,7 +122,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
       vi.mocked(userRepo.findUserProfileById).mockResolvedValue(mockUser);
       const response = await supertest(app).get(`/api/admin/users/${userId}`);
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUser);
+      expect(response.body.data).toEqual(mockUser);
       expect(userRepo.findUserProfileById).toHaveBeenCalledWith(userId, expect.any(Object));
     });
 
@@ -133,7 +133,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
       );
       const response = await supertest(app).get(`/api/admin/users/${missingId}`);
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('User not found.');
+      expect(response.body.error.message).toBe('User not found.');
     });
 
     it('should return 500 on a generic database error', async () => {
@@ -160,7 +160,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
         .put(`/api/admin/users/${userId}`)
         .send({ role: 'admin' });
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(updatedUser);
+      expect(response.body.data).toEqual(updatedUser);
       expect(adminRepo.updateUserRole).toHaveBeenCalledWith(userId, 'admin', expect.any(Object));
     });
 
@@ -173,7 +173,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
         .put(`/api/admin/users/${missingId}`)
         .send({ role: 'user' });
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe(`User with ID ${missingId} not found.`);
+      expect(response.body.error.message).toBe(`User with ID ${missingId} not found.`);
     });
 
     it('should return 500 on a generic database error', async () => {
@@ -183,7 +183,7 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
         .put(`/api/admin/users/${userId}`)
         .send({ role: 'admin' });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for an invalid role', async () => {
@@ -201,7 +201,11 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
       vi.mocked(userService.deleteUserAsAdmin).mockResolvedValue(undefined);
       const response = await supertest(app).delete(`/api/admin/users/${targetId}`);
       expect(response.status).toBe(204);
-      expect(userService.deleteUserAsAdmin).toHaveBeenCalledWith(adminId, targetId, expect.any(Object));
+      expect(userService.deleteUserAsAdmin).toHaveBeenCalledWith(
+        adminId,
+        targetId,
+        expect.any(Object),
+      );
     });
 
     it('should prevent an admin from deleting their own account', async () => {
@@ -209,9 +213,13 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
       vi.mocked(userService.deleteUserAsAdmin).mockRejectedValue(validationError);
       const response = await supertest(app).delete(`/api/admin/users/${adminId}`);
       expect(response.status).toBe(400);
-      expect(response.body.message).toMatch(/Admins cannot delete their own account/);
+      expect(response.body.error.message).toMatch(/Admins cannot delete their own account/);
       expect(userRepo.deleteUserById).not.toHaveBeenCalled();
-      expect(userService.deleteUserAsAdmin).toHaveBeenCalledWith(adminId, adminId, expect.any(Object));
+      expect(userService.deleteUserAsAdmin).toHaveBeenCalledWith(
+        adminId,
+        adminId,
+        expect.any(Object),
+      );
     });
 
     it('should return 500 on a generic database error', async () => {

src/routes/ai.routes.test.ts

@@ -151,7 +151,9 @@ describe('AI Routes (/api/ai)', () => {
     const validChecksum = 'a'.repeat(64);
 
     it('should enqueue a job and return 202 on success', async () => {
-      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({ id: 'job-123' } as unknown as Job);
+      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({
+        id: 'job-123',
+      } as unknown as Job);
 
       const response = await supertest(app)
         .post('/api/ai/upload-and-process')
@@ -159,8 +161,8 @@ describe('AI Routes (/api/ai)', () => {
         .attach('flyerFile', imagePath);
 
       expect(response.status).toBe(202);
-      expect(response.body.message).toBe('Flyer accepted for processing.');
-      expect(response.body.jobId).toBe('job-123');
+      expect(response.body.data.message).toBe('Flyer accepted for processing.');
+      expect(response.body.data.jobId).toBe('job-123');
       expect(aiService.aiService.enqueueFlyerProcessing).toHaveBeenCalled();
     });
 
@@ -170,7 +172,7 @@ describe('AI Routes (/api/ai)', () => {
         .field('checksum', validChecksum);
 
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('A flyer file (PDF or image) is required.');
+      expect(response.body.error.message).toBe('A flyer file (PDF or image) is required.');
     });
 
     it('should return 400 if checksum is missing', async () => {
@@ -180,11 +182,14 @@ describe('AI Routes (/api/ai)', () => {
 
       expect(response.status).toBe(400);
       // Use regex to be resilient to validation message changes
-      expect(response.body.errors[0].message).toMatch(/checksum is required|Required/i);
+      expect(response.body.error.details[0].message).toMatch(/checksum is required|Required/i);
     });
 
     it('should return 409 if flyer checksum already exists', async () => {
-      const duplicateError = new aiService.DuplicateFlyerError('This flyer has already been processed.', 99);
+      const duplicateError = new aiService.DuplicateFlyerError(
+        'This flyer has already been processed.',
+        99,
+      );
       vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockRejectedValue(duplicateError);
 
       const response = await supertest(app)
@@ -193,11 +198,13 @@ describe('AI Routes (/api/ai)', () => {
         .attach('flyerFile', imagePath);
 
       expect(response.status).toBe(409);
-      expect(response.body.message).toBe('This flyer has already been processed.');
+      expect(response.body.error.message).toBe('This flyer has already been processed.');
     });
 
     it('should return 500 if enqueuing the job fails', async () => {
-      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockRejectedValueOnce(new Error('Redis connection failed'));
+      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockRejectedValueOnce(
+        new Error('Redis connection failed'),
+      );
 
       const response = await supertest(app)
         .post('/api/ai/upload-and-process')
@@ -205,7 +212,7 @@ describe('AI Routes (/api/ai)', () => {
         .attach('flyerFile', imagePath);
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Redis connection failed');
+      expect(response.body.error.message).toBe('Redis connection failed');
     });
 
     it('should pass user ID to the job when authenticated', async () => {
@@ -219,8 +226,10 @@ describe('AI Routes (/api/ai)', () => {
         basePath: '/api/ai',
         authenticatedUser: mockUser,
       });
-      
-      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({ id: 'job-456' } as unknown as Job);
+
+      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({
+        id: 'job-456',
+      } as unknown as Job);
 
       // Act
       await supertest(authenticatedApp)
@@ -255,8 +264,10 @@ describe('AI Routes (/api/ai)', () => {
         basePath: '/api/ai',
         authenticatedUser: mockUserWithAddress,
       });
-      
-      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({ id: 'job-789' } as unknown as Job);
+
+      vi.mocked(aiService.aiService.enqueueFlyerProcessing).mockResolvedValue({
+        id: 'job-789',
+      } as unknown as Job);
 
       // Act
       await supertest(authenticatedApp)
@@ -296,7 +307,7 @@ describe('AI Routes (/api/ai)', () => {
       const response = await supertest(app).get('/api/ai/jobs/non-existent-job/status');
 
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Job not found.');
+      expect(response.body.error.message).toBe('Job not found.');
     });
 
     it('should return job status if job is found', async () => {
@@ -311,7 +322,7 @@ describe('AI Routes (/api/ai)', () => {
       const response = await supertest(app).get('/api/ai/jobs/job-123/status');
 
       expect(response.status).toBe(200);
-      expect(response.body.state).toBe('completed');
+      expect(response.body.data.state).toBe('completed');
     });
 
     // Removed flaky test 'should return 400 for an invalid job ID format'
@@ -343,7 +354,7 @@ describe('AI Routes (/api/ai)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyer);
+      expect(response.body.data).toEqual(mockFlyer);
       expect(aiService.aiService.processLegacyFlyerUpload).toHaveBeenCalledWith(
         expect.any(Object), // req.file
         expect.any(Object), // req.body
@@ -358,7 +369,7 @@ describe('AI Routes (/api/ai)', () => {
         .field('some_legacy_field', 'value');
 
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('No flyer file uploaded.');
+      expect(response.body.error.message).toBe('No flyer file uploaded.');
     });
 
     it('should return 409 and cleanup file if a duplicate flyer is detected', async () => {
@@ -366,23 +377,29 @@ describe('AI Routes (/api/ai)', () => {
       vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(duplicateError);
       const unlinkSpy = vi.spyOn(fs.promises, 'unlink').mockResolvedValue(undefined);
 
-      const response = await supertest(authenticatedApp).post('/api/ai/upload-legacy').attach('flyerFile', imagePath);
+      const response = await supertest(authenticatedApp)
+        .post('/api/ai/upload-legacy')
+        .attach('flyerFile', imagePath);
 
       expect(response.status).toBe(409);
-      expect(response.body.message).toBe('Duplicate legacy flyer.');
-      expect(response.body.flyerId).toBe(101);
+      expect(response.body.error.message).toBe('Duplicate legacy flyer.');
+      expect(response.body.error.details.flyerId).toBe(101);
       expect(unlinkSpy).toHaveBeenCalledTimes(1);
       unlinkSpy.mockRestore();
     });
 
     it('should return 500 and cleanup file on a generic service error', async () => {
-      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(new Error('Internal service failure'));
+      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(
+        new Error('Internal service failure'),
+      );
       const unlinkSpy = vi.spyOn(fs.promises, 'unlink').mockResolvedValue(undefined);
 
-      const response = await supertest(authenticatedApp).post('/api/ai/upload-legacy').attach('flyerFile', imagePath);
+      const response = await supertest(authenticatedApp)
+        .post('/api/ai/upload-legacy')
+        .attach('flyerFile', imagePath);
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Internal service failure');
+      expect(response.body.error.message).toBe('Internal service failure');
       expect(unlinkSpy).toHaveBeenCalledTimes(1);
       unlinkSpy.mockRestore();
     });
@@ -412,7 +429,7 @@ describe('AI Routes (/api/ai)', () => {
 
       // Assert
       expect(response.status).toBe(201);
-      expect(response.body.message).toBe('Flyer processed and saved successfully.');
+      expect(response.body.data.message).toBe('Flyer processed and saved successfully.');
       expect(aiService.aiService.processLegacyFlyerUpload).toHaveBeenCalledTimes(1);
     });
 
@@ -425,7 +442,10 @@ describe('AI Routes (/api/ai)', () => {
 
     it('should return 409 Conflict and delete the uploaded file if flyer checksum already exists', async () => {
       // Arrange
-      const duplicateError = new aiService.DuplicateFlyerError('This flyer has already been processed.', 99);
+      const duplicateError = new aiService.DuplicateFlyerError(
+        'This flyer has already been processed.',
+        99,
+      );
       vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(duplicateError);
       const unlinkSpy = vi.spyOn(fs.promises, 'unlink').mockResolvedValue(undefined);
 
@@ -437,12 +457,14 @@ describe('AI Routes (/api/ai)', () => {
 
       // Assert
       expect(response.status).toBe(409);
-      expect(response.body.message).toBe('This flyer has already been processed.');
+      expect(response.body.error.message).toBe('This flyer has already been processed.');
       expect(mockedDb.createFlyerAndItems).not.toHaveBeenCalled(); // Should not be called if service throws
       // Assert that the file was deleted
       expect(unlinkSpy).toHaveBeenCalledTimes(1);
       // The filename is predictable in the test environment because of the multer config in ai.routes.ts
-      expect(unlinkSpy).toHaveBeenCalledWith(expect.stringContaining('flyerImage-test-flyer-image.jpg'));
+      expect(unlinkSpy).toHaveBeenCalledWith(
+        expect.stringContaining('flyerImage-test-flyer-image.jpg'),
+      );
     });
 
     it('should accept payload when extractedData.items is missing and save with empty items', async () => {
@@ -453,7 +475,9 @@ describe('AI Routes (/api/ai)', () => {
         extractedData: { store_name: 'Partial Store' }, // no items key
       };
 
-      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockResolvedValue(createMockFlyer({ flyer_id: 2 }));
+      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockResolvedValue(
+        createMockFlyer({ flyer_id: 2 }),
+      );
 
       const response = await supertest(app)
         .post('/api/ai/flyers/process')
@@ -471,7 +495,9 @@ describe('AI Routes (/api/ai)', () => {
         extractedData: { items: [] }, // store_name missing
       };
 
-      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockResolvedValue(createMockFlyer({ flyer_id: 3 }));
+      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockResolvedValue(
+        createMockFlyer({ flyer_id: 3 }),
+      );
 
       const response = await supertest(app)
         .post('/api/ai/flyers/process')
@@ -519,7 +545,7 @@ describe('AI Routes (/api/ai)', () => {
       expect(aiService.aiService.processLegacyFlyerUpload).toHaveBeenCalledTimes(1);
     });
 
-   it('should handle payload where extractedData is null', async () => {
+    it('should handle payload where extractedData is null', async () => {
       const payloadWithNullExtractedData = {
         checksum: 'null-extracted-data-checksum',
         originalFileName: 'flyer-null.jpg',
@@ -590,10 +616,12 @@ describe('AI Routes (/api/ai)', () => {
 
     it('should handle malformed JSON in data field and return 400', async () => {
       const malformedDataString = '{"checksum":'; // Invalid JSON
-      
+
       // Since the service parses the data, we mock it to throw a ValidationError when parsing fails
       // or when it detects the malformed input.
-      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(new ValidationError([], 'Checksum is required.'));
+      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(
+        new ValidationError([], 'Checksum is required.'),
+      );
 
       const response = await supertest(app)
         .post('/api/ai/flyers/process')
@@ -603,8 +631,8 @@ describe('AI Routes (/api/ai)', () => {
       // The outer catch block should be hit, leading to empty parsed data.
       // The handler then fails the checksum validation.
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('Checksum is required.');
-      // Note: The logging expectation was removed because if the service throws a ValidationError, 
+      expect(response.body.error.message).toBe('Checksum is required.');
+      // Note: The logging expectation was removed because if the service throws a ValidationError,
       // the route handler passes it to the global error handler, which might log differently or not as a "critical error during parsing" in the route itself.
     });
 
@@ -615,9 +643,11 @@ describe('AI Routes (/api/ai)', () => {
       };
       // Spy on fs.promises.unlink to verify file cleanup
       const unlinkSpy = vi.spyOn(fs.promises, 'unlink').mockResolvedValue(undefined);
-      
+
       // Mock the service to throw a ValidationError because the checksum is missing
-      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(new ValidationError([], 'Checksum is required.'));
+      vi.mocked(aiService.aiService.processLegacyFlyerUpload).mockRejectedValue(
+        new ValidationError([], 'Checksum is required.'),
+      );
 
       const response = await supertest(app)
         .post('/api/ai/flyers/process')
@@ -625,7 +655,7 @@ describe('AI Routes (/api/ai)', () => {
         .attach('flyerImage', imagePath);
 
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('Checksum is required.');
+      expect(response.body.error.message).toBe('Checksum is required.');
       // Ensure the uploaded file is cleaned up
       expect(unlinkSpy).toHaveBeenCalledTimes(1);
 
@@ -643,7 +673,7 @@ describe('AI Routes (/api/ai)', () => {
     it('should return 200 with a stubbed response on success', async () => {
       const response = await supertest(app).post('/api/ai/check-flyer').attach('image', imagePath);
       expect(response.status).toBe(200);
-      expect(response.body.is_flyer).toBe(true);
+      expect(response.body.data.is_flyer).toBe(true);
     });
 
     it('should return 500 on a generic error', async () => {
@@ -674,7 +704,7 @@ describe('AI Routes (/api/ai)', () => {
         .attach('image', imagePath)
         .field('extractionType', 'store_name'); // Missing cropArea
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(
+      expect(response.body.error.details[0].message).toMatch(
         /cropArea must be a valid JSON string|Required/i,
       );
     });
@@ -700,7 +730,7 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/extract-address')
         .attach('image', imagePath);
       expect(response.status).toBe(200);
-      expect(response.body.address).toBe('not identified');
+      expect(response.body.data.address).toBe('not identified');
     });
 
     it('should return 500 on a generic error', async () => {
@@ -728,7 +758,7 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/extract-logo')
         .attach('images', imagePath);
       expect(response.status).toBe(200);
-      expect(response.body.store_logo_base_64).toBeNull();
+      expect(response.body.data.store_logo_base_64).toBeNull();
     });
 
     it('should return 500 on a generic error', async () => {
@@ -750,7 +780,11 @@ describe('AI Routes (/api/ai)', () => {
     const mockUser = createMockUserProfile({
       user: { user_id: 'user-123', email: 'user-123@test.com' },
     });
-    const authenticatedApp = createTestApp({ router: aiRouter, basePath: '/api/ai', authenticatedUser: mockUser });
+    const authenticatedApp = createTestApp({
+      router: aiRouter,
+      basePath: '/api/ai',
+      authenticatedUser: mockUser,
+    });
 
     beforeEach(() => {
       // Inject an authenticated user for this test block
@@ -771,7 +805,7 @@ describe('AI Routes (/api/ai)', () => {
         .attach('image', imagePath);
       // Use the authenticatedApp instance for requests in this block
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockResult);
+      expect(response.body.data).toEqual(mockResult);
       expect(aiService.aiService.extractTextFromImageArea).toHaveBeenCalled();
     });
 
@@ -788,27 +822,20 @@ describe('AI Routes (/api/ai)', () => {
 
       expect(response.status).toBe(500);
       // The error message might be wrapped or formatted differently
-      expect(response.body.message).toMatch(/AI API is down/i);
+      expect(response.body.error.message).toMatch(/AI API is down/i);
     });
   });
 
   describe('when user is authenticated', () => {
-    const mockUserProfile = createMockUserProfile({
-      user: { user_id: 'user-123', email: 'user-123@test.com' },
-    });
-    const authenticatedApp = createTestApp({ router: aiRouter, basePath: '/api/ai', authenticatedUser: mockUserProfile });
+    // Note: authenticatedApp is available from the describe block above if needed
 
-    beforeEach(() => {
-      // The authenticatedApp instance is already set up with mockUserProfile
-    });
-    
     it('POST /quick-insights should return the stubbed response', async () => {
       const response = await supertest(app)
         .post('/api/ai/quick-insights')
         .send({ items: [{ name: 'test' }] });
 
       expect(response.status).toBe(200);
-      expect(response.body.text).toContain('server-generated quick insight');
+      expect(response.body.data.text).toContain('server-generated quick insight');
     });
 
     it('POST /quick-insights should accept items with "item" property instead of "name"', async () => {
@@ -835,20 +862,20 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/deep-dive')
         .send({ items: [{ name: 'test' }] });
       expect(response.status).toBe(200);
-      expect(response.body.text).toContain('server-generated deep dive');
+      expect(response.body.data.text).toContain('server-generated deep dive');
     });
 
     it('POST /generate-image should return 501 Not Implemented', async () => {
       const response = await supertest(app).post('/api/ai/generate-image').send({ prompt: 'test' });
 
       expect(response.status).toBe(501);
-      expect(response.body.message).toBe('Image generation is not yet implemented.');
+      expect(response.body.error.message).toBe('Image generation is not yet implemented.');
     });
 
     it('POST /generate-speech should return 501 Not Implemented', async () => {
       const response = await supertest(app).post('/api/ai/generate-speech').send({ text: 'test' });
       expect(response.status).toBe(501);
-      expect(response.body.message).toBe('Speech generation is not yet implemented.');
+      expect(response.body.error.message).toBe('Speech generation is not yet implemented.');
     });
 
     it('POST /search-web should return the stubbed response', async () => {
@@ -857,7 +884,7 @@ describe('AI Routes (/api/ai)', () => {
         .send({ query: 'test query' });
 
       expect(response.status).toBe(200);
-      expect(response.body.text).toContain('The web says this is good');
+      expect(response.body.data.text).toContain('The web says this is good');
     });
 
     it('POST /compare-prices should return the stubbed response', async () => {
@@ -866,7 +893,7 @@ describe('AI Routes (/api/ai)', () => {
         .send({ items: [{ name: 'Milk' }] });
 
       expect(response.status).toBe(200);
-      expect(response.body.text).toContain('server-generated price comparison');
+      expect(response.body.data.text).toContain('server-generated price comparison');
     });
 
     it('POST /plan-trip should return result on success', async () => {
@@ -882,7 +909,7 @@ describe('AI Routes (/api/ai)', () => {
         });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockResult);
+      expect(response.body.data).toEqual(mockResult);
     });
 
     it('POST /plan-trip should return 500 if the AI service fails', async () => {
@@ -899,7 +926,7 @@ describe('AI Routes (/api/ai)', () => {
         });
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Maps API key invalid');
+      expect(response.body.error.message).toBe('Maps API key invalid');
     });
 
     it('POST /deep-dive should return 500 on a generic error', async () => {
@@ -910,7 +937,7 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/deep-dive')
         .send({ items: [{ name: 'test' }] });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Deep dive logging failed');
+      expect(response.body.error.message).toBe('Deep dive logging failed');
     });
 
     it('POST /search-web should return 500 on a generic error', async () => {
@@ -921,7 +948,7 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/search-web')
         .send({ query: 'test query' });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Search web logging failed');
+      expect(response.body.error.message).toBe('Search web logging failed');
     });
 
     it('POST /compare-prices should return 500 on a generic error', async () => {
@@ -932,7 +959,7 @@ describe('AI Routes (/api/ai)', () => {
         .post('/api/ai/compare-prices')
         .send({ items: [{ name: 'Milk' }] });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Compare prices logging failed');
+      expect(response.body.error.message).toBe('Compare prices logging failed');
     });
 
     it('POST /quick-insights should return 400 if items are missing', async () => {

src/routes/ai.routes.ts

@@ -9,10 +9,7 @@ import { optionalAuth } from './passport.routes';
 // 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
-import {
-  createUploadMiddleware,
-  handleMulterError,
-} from '../middleware/multer.middleware';
+import { createUploadMiddleware, handleMulterError } from '../middleware/multer.middleware';
 import { logger } from '../services/logger.server'; // Needed for module-level logging (e.g., Zod schema transforms)
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { UserProfile } from '../types'; // This was a duplicate, fixed.
@@ -26,6 +23,7 @@ import { cleanupUploadedFile, cleanupUploadedFiles } from '../utils/fileUtils';
 import { monitoringService } from '../services/monitoringService.server';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { aiUploadLimiter, aiGenerationLimiter } from '../config/rateLimiters';
+import { sendSuccess, sendError, ErrorCode } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -35,7 +33,8 @@ const uploadAndProcessSchema = z.object({
   body: z.object({
     // Stricter validation for SHA-256 checksum. It must be a 64-character hexadecimal string.
     checksum: requiredString('File checksum is required.').pipe(
-      z.string()
+      z
+        .string()
         .length(64, 'Checksum must be 64 characters long.')
         .regex(/^[a-f0-9]+$/, 'Checksum must be a valid hexadecimal string.'),
     ),
@@ -96,8 +95,14 @@ const flyerItemForAnalysisSchema = z
     // Sanitize item and name by trimming whitespace.
     // The transform ensures that null/undefined values are preserved
     // while trimming any actual string values.
-    item: z.string().nullish().transform(val => (val ? val.trim() : val)),
-    name: z.string().nullish().transform(val => (val ? val.trim() : val)),
+    item: z
+      .string()
+      .nullish()
+      .transform((val) => (val ? val.trim() : val)),
+    name: z
+      .string()
+      .nullish()
+      .transform((val) => (val ? val.trim() : val)),
   })
   // Using .passthrough() allows extra properties on the item object.
   // If the intent is to strictly enforce only 'item' and 'name' (and other known properties),
@@ -190,7 +195,12 @@ router.post(
       const { body } = uploadAndProcessSchema.parse({ body: req.body });
 
       if (!req.file) {
-        return res.status(400).json({ message: 'A flyer file (PDF or image) is required.' });
+        return sendError(
+          res,
+          ErrorCode.BAD_REQUEST,
+          'A flyer file (PDF or image) is required.',
+          400,
+        );
       }
 
       req.log.debug(
@@ -204,7 +214,7 @@ router.post(
       if (process.env.NODE_ENV === 'test' && !req.headers['authorization']) {
         userProfile = undefined;
       }
- 
+
       const job = await aiService.enqueueFlyerProcessing(
         req.file,
         body.checksum,
@@ -215,15 +225,19 @@ router.post(
       );
 
       // Respond immediately to the client with 202 Accepted
-      res.status(202).json({
-        message: 'Flyer accepted for processing.',
-        jobId: job.id,
-      });
+      sendSuccess(
+        res,
+        {
+          message: 'Flyer accepted for processing.',
+          jobId: job.id,
+        },
+        202,
+      );
     } catch (error) {
       await cleanupUploadedFile(req.file);
       if (error instanceof DuplicateFlyerError) {
         req.log.warn(`Duplicate flyer upload attempt blocked for checksum: ${req.body?.checksum}`);
-        return res.status(409).json({ message: error.message, flyerId: error.flyerId });
+        return sendError(res, ErrorCode.CONFLICT, error.message, 409, { flyerId: error.flyerId });
       }
       next(error);
     }
@@ -234,6 +248,9 @@ 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.
  */
 router.post(
   '/upload-legacy',
@@ -243,16 +260,21 @@ router.post(
   async (req: Request, res: Response, next: NextFunction) => {
     try {
       if (!req.file) {
-        return res.status(400).json({ message: 'No flyer file uploaded.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'No flyer file uploaded.', 400);
       }
       const userProfile = req.user as UserProfile;
-      const newFlyer = await aiService.processLegacyFlyerUpload(req.file, req.body, userProfile, req.log);
-      res.status(200).json(newFlyer);
+      const newFlyer = await aiService.processLegacyFlyerUpload(
+        req.file,
+        req.body,
+        userProfile,
+        req.log,
+      );
+      sendSuccess(res, newFlyer);
     } catch (error) {
       await cleanupUploadedFile(req.file);
       if (error instanceof DuplicateFlyerError) {
         req.log.warn(`Duplicate legacy flyer upload attempt blocked.`);
-        return res.status(409).json({ message: error.message, flyerId: error.flyerId });
+        return sendError(res, ErrorCode.CONFLICT, error.message, 409, { flyerId: error.flyerId });
       }
       next(error);
     }
@@ -274,7 +296,7 @@ router.get(
     try {
       const jobStatus = await monitoringService.getFlyerJobStatus(jobId); // This was a duplicate, fixed.
       req.log.debug(`[API /ai/jobs] Status check for job ${jobId}: ${jobStatus.state}`);
-      res.json(jobStatus);
+      sendSuccess(res, jobStatus);
     } catch (error) {
       next(error);
     }
@@ -282,9 +304,12 @@ router.get(
 );
 
 /**
- * This endpoint saves the processed flyer data to the database. It is the final step
- * in the flyer upload workflow after the AI has extracted the data.
+ * 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.
  */
 router.post(
   '/flyers/process',
@@ -294,7 +319,7 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       if (!req.file) {
-        return res.status(400).json({ message: 'Flyer image file is required.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'Flyer image file is required.', 400);
       }
 
       const userProfile = req.user as UserProfile | undefined;
@@ -306,12 +331,16 @@ router.post(
         req.log,
       );
 
-      res.status(201).json({ message: 'Flyer processed and saved successfully.', flyer: newFlyer });
+      sendSuccess(
+        res,
+        { message: 'Flyer processed and saved successfully.', flyer: newFlyer },
+        201,
+      );
     } catch (error) {
       await cleanupUploadedFile(req.file);
       if (error instanceof DuplicateFlyerError) {
         req.log.warn(`Duplicate flyer upload attempt blocked.`);
-        return res.status(409).json({ message: error.message, flyerId: error.flyerId });
+        return sendError(res, ErrorCode.CONFLICT, error.message, 409, { flyerId: error.flyerId });
       }
       next(error);
     }
@@ -330,10 +359,10 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       if (!req.file) {
-        return res.status(400).json({ message: 'Image file is required.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'Image file is required.', 400);
       }
       req.log.info(`Server-side flyer check for file: ${req.file.originalname}`);
-      res.status(200).json({ is_flyer: true }); // Stubbed response
+      sendSuccess(res, { is_flyer: true }); // Stubbed response
     } catch (error) {
       next(error);
     } finally {
@@ -350,10 +379,10 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       if (!req.file) {
-        return res.status(400).json({ message: 'Image file is required.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'Image file is required.', 400);
       }
       req.log.info(`Server-side address extraction for file: ${req.file.originalname}`);
-      res.status(200).json({ address: 'not identified' }); // Updated stubbed response
+      sendSuccess(res, { address: 'not identified' }); // Updated stubbed response
     } catch (error) {
       next(error);
     } finally {
@@ -370,10 +399,10 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       if (!req.files || !Array.isArray(req.files) || req.files.length === 0) {
-        return res.status(400).json({ message: 'Image files are required.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'Image files are required.', 400);
       }
       req.log.info(`Server-side logo extraction for ${req.files.length} image(s).`);
-      res.status(200).json({ store_logo_base_64: null }); // Stubbed response
+      sendSuccess(res, { store_logo_base_64: null }); // Stubbed response
     } catch (error) {
       next(error);
     } finally {
@@ -390,9 +419,7 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       req.log.info(`Server-side quick insights requested.`);
-      res
-        .status(200)
-        .json({ text: 'This is a server-generated quick insight: buy the cheap stuff!' }); // Stubbed response
+      sendSuccess(res, { text: 'This is a server-generated quick insight: buy the cheap stuff!' }); // Stubbed response
     } catch (error) {
       next(error);
     }
@@ -407,9 +434,9 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       req.log.info(`Server-side deep dive requested.`);
-      res
-        .status(200)
-        .json({ text: 'This is a server-generated deep dive analysis. It is very detailed.' }); // Stubbed response
+      sendSuccess(res, {
+        text: 'This is a server-generated deep dive analysis. It is very detailed.',
+      }); // Stubbed response
     } catch (error) {
       next(error);
     }
@@ -424,7 +451,7 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       req.log.info(`Server-side web search requested.`);
-      res.status(200).json({ text: 'The web says this is good.', sources: [] }); // Stubbed response
+      sendSuccess(res, { text: 'The web says this is good.', sources: [] }); // Stubbed response
     } catch (error) {
       next(error);
     }
@@ -440,7 +467,7 @@ router.post(
     try {
       const { items } = req.body;
       req.log.info(`Server-side price comparison requested for ${items.length} items.`);
-      res.status(200).json({
+      sendSuccess(res, {
         text: 'This is a server-generated price comparison. Milk is cheaper at SuperMart.',
         sources: [],
       }); // Stubbed response
@@ -460,7 +487,7 @@ router.post(
       const { items, store, userLocation } = req.body;
       req.log.debug({ itemCount: items.length, storeName: store.name }, 'Trip planning requested.');
       const result = await aiService.planTripWithMaps(items, store, userLocation);
-      res.status(200).json(result);
+      sendSuccess(res, result);
     } catch (error) {
       req.log.error({ error: errMsg(error) }, 'Error in /api/ai/plan-trip endpoint:');
       next(error);
@@ -479,7 +506,7 @@ router.post(
     // This endpoint is a placeholder for a future feature.
     // Returning 501 Not Implemented is the correct HTTP response for this case.
     req.log.info('Request received for unimplemented endpoint: /api/ai/generate-image');
-    res.status(501).json({ message: 'Image generation is not yet implemented.' });
+    sendError(res, ErrorCode.NOT_IMPLEMENTED, 'Image generation is not yet implemented.', 501);
   },
 );
 
@@ -492,7 +519,7 @@ router.post(
     // This endpoint is a placeholder for a future feature.
     // Returning 501 Not Implemented is the correct HTTP response for this case.
     req.log.info('Request received for unimplemented endpoint: /api/ai/generate-speech');
-    res.status(501).json({ message: 'Speech generation is not yet implemented.' });
+    sendError(res, ErrorCode.NOT_IMPLEMENTED, 'Speech generation is not yet implemented.', 501);
   },
 );
 
@@ -509,7 +536,7 @@ router.post(
   async (req, res, next: NextFunction) => {
     try {
       if (!req.file) {
-        return res.status(400).json({ message: 'Image file is required.' });
+        return sendError(res, ErrorCode.BAD_REQUEST, 'Image file is required.', 400);
       }
       // validateRequest transforms the cropArea JSON string into an object in req.body.
       // So we use it directly instead of JSON.parse().
@@ -530,7 +557,7 @@ router.post(
         req.log,
       );
 
-      res.status(200).json(result);
+      sendSuccess(res, result);
     } catch (error) {
       next(error);
     } finally {

src/routes/auth.routes.test.ts

@@ -137,9 +137,9 @@ describe('Auth Routes (/api/auth)', () => {
       });
       // Assert
       expect(response.status).toBe(201);
-      expect(response.body.message).toBe('User registered successfully!');
-      expect(response.body.userprofile.user.email).toBe(newUserEmail);
-      expect(response.body.token).toBeTypeOf('string'); // This was a duplicate, fixed.
+      expect(response.body.data.message).toBe('User registered successfully!');
+      expect(response.body.data.userprofile.user.email).toBe(newUserEmail);
+      expect(response.body.data.token).toBeTypeOf('string'); // This was a duplicate, fixed.
       expect(mockedAuthService.registerAndLoginUser).toHaveBeenCalledWith(
         newUserEmail,
         strongPassword,
@@ -171,7 +171,7 @@ describe('Auth Routes (/api/auth)', () => {
 
       // Assert
       expect(response.status).toBe(201);
-      expect(response.body.message).toBe('User registered successfully!');
+      expect(response.body.data.message).toBe('User registered successfully!');
       expect(mockedAuthService.registerAndLoginUser).toHaveBeenCalledWith(
         email,
         strongPassword,
@@ -242,7 +242,7 @@ describe('Auth Routes (/api/auth)', () => {
       interface ZodError {
         message: string;
       }
-      const errorMessages = response.body.errors?.map((e: ZodError) => e.message).join(' ');
+      const errorMessages = response.body.error.details?.map((e: ZodError) => e.message).join(' ');
       expect(errorMessages).toMatch(/Password is too weak/i);
     });
 
@@ -260,7 +260,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: newUserEmail, password: strongPassword });
 
       expect(response.status).toBe(409); // 409 Conflict
-      expect(response.body.message).toBe('User with that email already exists.');
+      expect(response.body.error.message).toBe('User with that email already exists.');
     });
 
     it('should return 500 if a generic database error occurs during registration', async () => {
@@ -272,7 +272,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'fail@test.com', password: strongPassword });
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB connection lost'); // The errorHandler will forward the message
+      expect(response.body.error.message).toBe('DB connection lost'); // The errorHandler will forward the message
     });
 
     it('should return 400 for an invalid email format', async () => {
@@ -281,7 +281,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'not-an-email', password: strongPassword });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('A valid email is required.');
+      expect(response.body.error.details[0].message).toBe('A valid email is required.');
     });
 
     it('should return 400 for a password that is too short', async () => {
@@ -290,7 +290,9 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: newUserEmail, password: 'short' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('Password must be at least 8 characters long.');
+      expect(response.body.error.details[0].message).toBe(
+        'Password must be at least 8 characters long.',
+      );
     });
   });
 
@@ -309,7 +311,7 @@ describe('Auth Routes (/api/auth)', () => {
       // Assert
       expect(response.status).toBe(200);
       // The API now returns a nested UserProfile object
-      expect(response.body.userprofile).toEqual(
+      expect(response.body.data.userprofile).toEqual(
         expect.objectContaining({
           user: expect.objectContaining({
             user_id: 'user-123',
@@ -317,7 +319,7 @@ describe('Auth Routes (/api/auth)', () => {
           }),
         }),
       );
-      expect(response.body.token).toBeTypeOf('string');
+      expect(response.body.data.token).toBeTypeOf('string');
       expect(response.headers['set-cookie']).toBeDefined();
     });
 
@@ -327,7 +329,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'test@test.com', password: 'wrong_password' });
 
       expect(response.status).toBe(401);
-      expect(response.body.message).toBe('Incorrect email or password.');
+      expect(response.body.error.message).toBe('Incorrect email or password.');
     });
 
     it('should reject login for a locked account', async () => {
@@ -336,7 +338,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'locked@test.com', password: 'password123' });
 
       expect(response.status).toBe(401);
-      expect(response.body.message).toBe(
+      expect(response.body.error.message).toBe(
         'Account is temporarily locked. Please try again in 15 minutes.',
       );
     });
@@ -371,7 +373,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'dberror@test.com', password: 'any_password' });
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Database connection failed');
+      expect(response.body.error.message).toBe('Database connection failed');
     });
 
     it('should log a warning when passport authentication fails without a user', async () => {
@@ -414,7 +416,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'not-an-email', password: 'password123' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('A valid email is required.');
+      expect(response.body.error.details[0].message).toBe('A valid email is required.');
     });
 
     it('should return 400 if password is missing', async () => {
@@ -423,7 +425,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'test@test.com' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('Password is required.');
+      expect(response.body.error.details[0].message).toBe('Password is required.');
     });
   });
 
@@ -439,8 +441,8 @@ describe('Auth Routes (/api/auth)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body.message).toContain('a password reset link has been sent'); // This was a duplicate, fixed.
-      expect(response.body.token).toBeTypeOf('string');
+      expect(response.body.data.message).toContain('a password reset link has been sent'); // This was a duplicate, fixed.
+      expect(response.body.data.token).toBeTypeOf('string');
     });
 
     it('should return a generic success message even if the user does not exist', async () => {
@@ -451,7 +453,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'nouser@test.com' });
 
       expect(response.status).toBe(200);
-      expect(response.body.message).toContain('a password reset link has been sent');
+      expect(response.body.data.message).toContain('a password reset link has been sent');
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -469,7 +471,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ email: 'invalid-email' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('A valid email is required.');
+      expect(response.body.error.details[0].message).toBe('A valid email is required.');
     });
   });
 
@@ -482,7 +484,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ token: 'valid-token', newPassword: 'a-Very-Strong-Password-789!' });
 
       expect(response.status).toBe(200);
-      expect(response.body.message).toBe('Password has been reset successfully.');
+      expect(response.body.data.message).toBe('Password has been reset successfully.');
     });
 
     it('should reject with an invalid or expired token', async () => {
@@ -493,7 +495,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ token: 'invalid-token', newPassword: 'a-Very-Strong-Password-123!' }); // Use strong password to pass validation
 
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('Invalid or expired password reset token.');
+      expect(response.body.error.message).toBe('Invalid or expired password reset token.');
     });
 
     it('should return 400 for a weak new password', async () => {
@@ -511,7 +513,7 @@ describe('Auth Routes (/api/auth)', () => {
         .send({ newPassword: 'a-Very-Strong-Password-789!' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/Token is required|Required/i);
+      expect(response.body.error.details[0].message).toMatch(/Token is required|Required/i);
     });
   });
 
@@ -524,13 +526,13 @@ describe('Auth Routes (/api/auth)', () => {
         .set('Cookie', 'refreshToken=valid-refresh-token');
 
       expect(response.status).toBe(200);
-      expect(response.body.token).toBeTypeOf('string');
+      expect(response.body.data.token).toBeTypeOf('string');
     });
 
     it('should return 401 if no refresh token cookie is provided', async () => {
       const response = await supertest(app).post('/api/auth/refresh-token');
       expect(response.status).toBe(401);
-      expect(response.body.message).toBe('Refresh token not found.');
+      expect(response.body.error.message).toBe('Refresh token not found.');
     });
 
     it('should return 403 if refresh token is invalid', async () => {
@@ -552,7 +554,7 @@ describe('Auth Routes (/api/auth)', () => {
         .post('/api/auth/refresh-token')
         .set('Cookie', 'refreshToken=any-token');
       expect(response.status).toBe(500);
-      expect(response.body.message).toMatch(/DB Error/);
+      expect(response.body.error.message).toMatch(/DB Error/);
     });
   });
 
@@ -568,7 +570,7 @@ describe('Auth Routes (/api/auth)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body.message).toBe('Logged out successfully.');
+      expect(response.body.data.message).toBe('Logged out successfully.');
 
       // Check that the 'set-cookie' header is trying to expire the cookie
       const setCookieHeader = response.headers['set-cookie'];
@@ -616,7 +618,7 @@ describe('Auth Routes (/api/auth)', () => {
     });
   });
 
-describe('Rate Limiting on /forgot-password', () => {
+  describe('Rate Limiting on /forgot-password', () => {
     it('should block requests after exceeding the limit when the opt-in header is sent', async () => {
       // Arrange
       const email = 'rate-limit-test@example.com';
@@ -658,7 +660,7 @@ describe('Rate Limiting on /forgot-password', () => {
         expect(response.status, `Request ${i + 1} should succeed`).toBe(200);
       }
     });
-});
+  });
 
   describe('Rate Limiting on /reset-password', () => {
     it('should block requests after exceeding the limit when the opt-in header is sent', async () => {

src/routes/auth.routes.ts

@@ -23,6 +23,7 @@ import {
   refreshTokenLimiter,
   logoutLimiter,
 } from '../config/rateLimiters';
+import { sendSuccess, sendError, ErrorCode } from '../utils/apiResponse';
 
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { authService } from '../services/authService';
@@ -103,13 +104,19 @@ router.post(
         secure: process.env.NODE_ENV === 'production',
         maxAge: 7 * 24 * 60 * 60 * 1000, // 7 days
       });
-      return res
-        .status(201)
-        .json({ message: 'User registered successfully!', userprofile: newUserProfile, token: accessToken });
+      return sendSuccess(
+        res,
+        {
+          message: 'User registered successfully!',
+          userprofile: newUserProfile,
+          token: accessToken,
+        },
+        201,
+      );
     } catch (error: unknown) {
       if (error instanceof UniqueConstraintError) {
         // If the email is a duplicate, return a 409 Conflict status.
-        return res.status(409).json({ message: error.message });
+        return sendError(res, ErrorCode.CONFLICT, error.message, 409);
       }
       req.log.error({ error }, `User registration route failed for email: ${email}.`);
       // Pass the error to the centralized handler
@@ -143,13 +150,16 @@ router.post(
           return next(err);
         }
         if (!user) {
-          return res.status(401).json({ message: info.message || 'Login failed' });
+          return sendError(res, ErrorCode.UNAUTHORIZED, info.message || 'Login failed', 401);
         }
 
         try {
           const { rememberMe } = req.body;
           const userProfile = user as UserProfile;
-          const { accessToken, refreshToken } = await authService.handleSuccessfulLogin(userProfile, req.log);
+          const { accessToken, refreshToken } = await authService.handleSuccessfulLogin(
+            userProfile,
+            req.log,
+          );
           req.log.info(`JWT and refresh token issued for user: ${userProfile.user.email}`);
 
           const cookieOptions = {
@@ -160,7 +170,7 @@ router.post(
 
           res.cookie('refreshToken', refreshToken, cookieOptions);
           // Return the full user profile object on login to avoid a second fetch on the client.
-          return res.json({ userprofile: userProfile, token: accessToken });
+          return sendSuccess(res, { userprofile: userProfile, token: accessToken });
         } catch (tokenErr) {
           const email = (user as UserProfile)?.user?.email || req.body.email;
           req.log.error({ error: tokenErr }, `Failed to process login for user: ${email}`);
@@ -191,7 +201,7 @@ router.post(
         message: 'If an account with that email exists, a password reset link has been sent.',
       };
       if (process.env.NODE_ENV === 'test' && token) responsePayload.token = token;
-      res.status(200).json(responsePayload);
+      sendSuccess(res, responsePayload);
     } catch (error) {
       req.log.error({ error }, `An error occurred during /forgot-password for email: ${email}`);
       next(error);
@@ -214,10 +224,15 @@ router.post(
       const resetSuccessful = await authService.updatePassword(token, newPassword, req.log);
 
       if (!resetSuccessful) {
-        return res.status(400).json({ message: 'Invalid or expired password reset token.' });
+        return sendError(
+          res,
+          ErrorCode.BAD_REQUEST,
+          'Invalid or expired password reset token.',
+          400,
+        );
       }
 
-      res.status(200).json({ message: 'Password has been reset successfully.' });
+      sendSuccess(res, { message: 'Password has been reset successfully.' });
     } catch (error) {
       req.log.error({ error }, `An error occurred during password reset.`);
       next(error);
@@ -226,23 +241,27 @@ router.post(
 );
 
 // New Route to refresh the access token
-router.post('/refresh-token', refreshTokenLimiter, async (req: Request, res: Response, next: NextFunction) => {
-  const { refreshToken } = req.cookies;
-  if (!refreshToken) {
-    return res.status(401).json({ message: 'Refresh token not found.' });
-  }
-
-  try {
-    const result = await authService.refreshAccessToken(refreshToken, req.log);
-    if (!result) {
-      return res.status(403).json({ message: 'Invalid or expired refresh token.' });
+router.post(
+  '/refresh-token',
+  refreshTokenLimiter,
+  async (req: Request, res: Response, next: NextFunction) => {
+    const { refreshToken } = req.cookies;
+    if (!refreshToken) {
+      return sendError(res, ErrorCode.UNAUTHORIZED, 'Refresh token not found.', 401);
     }
-    res.json({ token: result.accessToken });
-  } catch (error) {
-    req.log.error({ error }, 'An error occurred during /refresh-token.');
-    next(error);
-  }
-});
+
+    try {
+      const result = await authService.refreshAccessToken(refreshToken, req.log);
+      if (!result) {
+        return sendError(res, ErrorCode.FORBIDDEN, 'Invalid or expired refresh token.', 403);
+      }
+      sendSuccess(res, { token: result.accessToken });
+    } catch (error) {
+      req.log.error({ error }, 'An error occurred during /refresh-token.');
+      next(error);
+    }
+  },
+);
 
 /**
  * POST /api/auth/logout - Logs the user out by invalidating their refresh token.
@@ -264,7 +283,7 @@ router.post('/logout', logoutLimiter, async (req: Request, res: Response) => {
     maxAge: 0, // Use maxAge for modern compatibility; Express sets 'Expires' as a fallback.
     secure: process.env.NODE_ENV === 'production',
   });
-  res.status(200).json({ message: 'Logged out successfully.' });
+  sendSuccess(res, { message: 'Logged out successfully.' });
 });
 
 // --- OAuth Routes ---

src/routes/budget.routes.test.ts

@@ -69,7 +69,11 @@ describe('Budget Routes (/api/budgets)', () => {
     vi.mocked(db.budgetRepo.getSpendingByCategory).mockResolvedValue([]);
   });
 
-  const app = createTestApp({ router: budgetRouter, basePath: '/api/budgets', authenticatedUser: mockUserProfile });
+  const app = createTestApp({
+    router: budgetRouter,
+    basePath: '/api/budgets',
+    authenticatedUser: mockUserProfile,
+  });
 
   describe('GET /', () => {
     it('should return a list of budgets for the user', async () => {
@@ -80,7 +84,7 @@ describe('Budget Routes (/api/budgets)', () => {
       const response = await supertest(app).get('/api/budgets');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockBudgets);
+      expect(response.body.data).toEqual(mockBudgets);
       expect(db.budgetRepo.getBudgetsForUser).toHaveBeenCalledWith(
         mockUserProfile.user.user_id,
         expectLogger,
@@ -91,7 +95,7 @@ describe('Budget Routes (/api/budgets)', () => {
       vi.mocked(db.budgetRepo.getBudgetsForUser).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).get('/api/budgets');
       expect(response.status).toBe(500); // The custom handler will now be used
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -114,7 +118,7 @@ describe('Budget Routes (/api/budgets)', () => {
       const response = await supertest(app).post('/api/budgets').send(newBudgetData);
 
       expect(response.status).toBe(201);
-      expect(response.body).toEqual(mockCreatedBudget);
+      expect(response.body.data).toEqual(mockCreatedBudget);
     });
 
     it('should return 400 if the user does not exist', async () => {
@@ -129,7 +133,7 @@ describe('Budget Routes (/api/budgets)', () => {
       );
       const response = await supertest(app).post('/api/budgets').send(newBudgetData);
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('User not found');
+      expect(response.body.error.message).toBe('User not found');
     });
 
     it('should return 500 if a generic database error occurs', async () => {
@@ -142,7 +146,7 @@ describe('Budget Routes (/api/budgets)', () => {
       vi.mocked(db.budgetRepo.createBudget).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).post('/api/budgets').send(newBudgetData);
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for invalid budget data', async () => {
@@ -156,7 +160,7 @@ describe('Budget Routes (/api/budgets)', () => {
       const response = await supertest(app).post('/api/budgets').send(invalidData);
 
       expect(response.status).toBe(400);
-      expect(response.body.errors).toHaveLength(4);
+      expect(response.body.error.details).toHaveLength(4);
     });
 
     it('should return 400 if required fields are missing', async () => {
@@ -165,7 +169,7 @@ describe('Budget Routes (/api/budgets)', () => {
         .post('/api/budgets')
         .send({ amount_cents: 10000, period: 'monthly', start_date: '2024-01-01' });
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('Budget name is required.');
+      expect(response.body.error.details[0].message).toBe('Budget name is required.');
     });
   });
 
@@ -183,7 +187,7 @@ describe('Budget Routes (/api/budgets)', () => {
       const response = await supertest(app).put('/api/budgets/1').send(budgetUpdates);
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUpdatedBudget);
+      expect(response.body.data).toEqual(mockUpdatedBudget);
     });
 
     it('should return 404 if the budget is not found', async () => {
@@ -192,7 +196,7 @@ describe('Budget Routes (/api/budgets)', () => {
       );
       const response = await supertest(app).put('/api/budgets/999').send({ amount_cents: 1 });
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Budget not found');
+      expect(response.body.error.message).toBe('Budget not found');
     });
 
     it('should return 500 if a generic database error occurs', async () => {
@@ -200,13 +204,13 @@ describe('Budget Routes (/api/budgets)', () => {
       vi.mocked(db.budgetRepo.updateBudget).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).put('/api/budgets/1').send(budgetUpdates);
       expect(response.status).toBe(500); // The custom handler will now be used
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 if no update fields are provided', async () => {
       const response = await supertest(app).put('/api/budgets/1').send({});
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe(
+      expect(response.body.error.details[0].message).toBe(
         'At least one field to update must be provided.',
       );
     });
@@ -214,7 +218,7 @@ describe('Budget Routes (/api/budgets)', () => {
     it('should return 400 for an invalid budget ID', async () => {
       const response = await supertest(app).put('/api/budgets/abc').send({ amount_cents: 5000 });
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/Invalid ID|number/i);
+      expect(response.body.error.details[0].message).toMatch(/Invalid ID|number/i);
     });
   });
 
@@ -239,20 +243,20 @@ describe('Budget Routes (/api/budgets)', () => {
       );
       const response = await supertest(app).delete('/api/budgets/999');
       expect(response.status).toBe(404);
-      expect(response.body.message).toBe('Budget not found');
+      expect(response.body.error.message).toBe('Budget not found');
     });
 
     it('should return 500 if a generic database error occurs', async () => {
       vi.mocked(db.budgetRepo.deleteBudget).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(app).delete('/api/budgets/1');
       expect(response.status).toBe(500); // The custom handler will now be used
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for an invalid budget ID', async () => {
       const response = await supertest(app).delete('/api/budgets/abc');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/Invalid ID|number/i);
+      expect(response.body.error.details[0].message).toMatch(/Invalid ID|number/i);
     });
   });
 
@@ -269,7 +273,7 @@ describe('Budget Routes (/api/budgets)', () => {
       );
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockSpendingData);
+      expect(response.body.data).toEqual(mockSpendingData);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -281,7 +285,7 @@ describe('Budget Routes (/api/budgets)', () => {
       );
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for invalid date formats', async () => {
@@ -289,14 +293,14 @@ describe('Budget Routes (/api/budgets)', () => {
         '/api/budgets/spending-analysis?startDate=2024/01/01&endDate=invalid',
       );
       expect(response.status).toBe(400);
-      expect(response.body.errors).toHaveLength(2);
+      expect(response.body.error.details).toHaveLength(2);
     });
 
     it('should return 400 if required query parameters are missing', async () => {
       const response = await supertest(app).get('/api/budgets/spending-analysis');
       expect(response.status).toBe(400);
       // Expect errors for both startDate and endDate
-      expect(response.body.errors).toHaveLength(2);
+      expect(response.body.error.details).toHaveLength(2);
     });
   });
 });

src/routes/budget.routes.ts

@@ -7,11 +7,15 @@ import type { UserProfile } from '../types';
 import { validateRequest } from '../middleware/validation.middleware';
 import { requiredString, numericIdParam } from '../utils/zodUtils';
 import { budgetUpdateLimiter } from '../config/rateLimiters';
+import { sendSuccess, sendNoContent } from '../utils/apiResponse';
 
 const router = express.Router();
 
 // --- Zod Schemas for Budget Routes (as per ADR-003) ---
-const budgetIdParamSchema = numericIdParam('id', "Invalid ID for parameter 'id'. Must be a number.");
+const budgetIdParamSchema = numericIdParam(
+  'id',
+  "Invalid ID for parameter 'id'. Must be a number.",
+);
 
 const createBudgetSchema = z.object({
   body: z.object({
@@ -48,7 +52,7 @@ router.get('/', async (req: Request, res: Response, next: NextFunction) => {
   const userProfile = req.user as UserProfile;
   try {
     const budgets = await budgetRepo.getBudgetsForUser(userProfile.user.user_id, req.log);
-    res.json(budgets);
+    sendSuccess(res, budgets);
   } catch (error) {
     req.log.error({ error, userId: userProfile.user.user_id }, 'Error fetching budgets');
     next(error);
@@ -67,7 +71,7 @@ router.post(
     const { body } = req as unknown as CreateBudgetRequest;
     try {
       const newBudget = await budgetRepo.createBudget(userProfile.user.user_id, body, req.log);
-      res.status(201).json(newBudget);
+      sendSuccess(res, newBudget, 201);
     } catch (error: unknown) {
       req.log.error({ error, userId: userProfile.user.user_id, body }, 'Error creating budget');
       next(error);
@@ -92,7 +96,7 @@ router.put(
         body,
         req.log,
       );
-      res.json(updatedBudget);
+      sendSuccess(res, updatedBudget);
     } catch (error: unknown) {
       req.log.error(
         { error, userId: userProfile.user.user_id, budgetId: params.id },
@@ -115,7 +119,7 @@ router.delete(
     const { params } = req as unknown as DeleteBudgetRequest;
     try {
       await budgetRepo.deleteBudget(params.id, userProfile.user.user_id, req.log);
-      res.status(204).send(); // No Content
+      sendNoContent(res);
     } catch (error: unknown) {
       req.log.error(
         { error, userId: userProfile.user.user_id, budgetId: params.id },
@@ -147,7 +151,7 @@ router.get(
         endDate,
         req.log,
       );
-      res.json(spendingData);
+      sendSuccess(res, spendingData);
     } catch (error) {
       req.log.error(
         { error, userId: userProfile.user.user_id, startDate, endDate },

src/routes/deals.routes.test.ts

@@ -27,16 +27,14 @@ vi.mock('../services/logger.server', async () => ({
 // Mock the passport middleware
 vi.mock('./passport.routes', () => ({
   default: {
-    authenticate: vi.fn(
-      (_strategy, _options) => (req: Request, res: Response, next: NextFunction) => {
-        // If req.user is not set by the test setup, simulate unauthenticated access.
-        if (!req.user) {
-          return res.status(401).json({ message: 'Unauthorized' });
-        }
-        // If req.user is set, proceed as an authenticated user.
-        next();
-      },
-    ),
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      // If req.user is not set by the test setup, simulate unauthenticated access.
+      if (!req.user) {
+        return res.status(401).json({ message: 'Unauthorized' });
+      }
+      // If req.user is set, proceed as an authenticated user.
+      next();
+    }),
   },
 }));
 
@@ -77,7 +75,7 @@ describe('Deals Routes (/api/users/deals)', () => {
       );
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockDeals);
+      expect(response.body.data).toEqual(mockDeals);
       expect(dealsRepo.findBestPricesForWatchedItems).toHaveBeenCalledWith(
         mockUser.user.user_id,
         expectLogger,
@@ -96,7 +94,7 @@ describe('Deals Routes (/api/users/deals)', () => {
         '/api/users/deals/best-watched-prices',
       );
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching best watched item deals.',

src/routes/deals.routes.ts

@@ -6,6 +6,7 @@ import { dealsRepo } from '../services/db/deals.db';
 import type { UserProfile } from '../types';
 import { validateRequest } from '../middleware/validation.middleware';
 import { userReadLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = express.Router();
 
@@ -40,7 +41,7 @@ router.get(
         req.log,
       );
       req.log.info({ dealCount: deals.length }, 'Successfully fetched best watched item deals.');
-      res.status(200).json(deals);
+      sendSuccess(res, deals);
     } catch (error) {
       req.log.error({ error }, 'Error fetching best watched item deals.');
       next(error); // Pass errors to the global error handler

src/routes/flyer.routes.test.ts

@@ -49,7 +49,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       const response = await supertest(app).get('/api/flyers');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyers);
+      expect(response.body.data).toEqual(mockFlyers);
       // Also assert that the default limit and offset were used.
       expect(db.flyerRepo.getFlyers).toHaveBeenCalledWith(expectLogger, 20, 0);
     });
@@ -77,7 +77,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       vi.mocked(db.flyerRepo.getFlyers).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/flyers');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching flyers in /api/flyers:',
@@ -87,8 +87,8 @@ describe('Flyer Routes (/api/flyers)', () => {
     it('should return 400 for invalid query parameters', async () => {
       const response = await supertest(app).get('/api/flyers?limit=abc&offset=-5');
       expect(response.status).toBe(400);
-      expect(response.body.errors).toBeDefined();
-      expect(response.body.errors.length).toBe(2);
+      expect(response.body.error.details).toBeDefined();
+      expect(response.body.error.details.length).toBe(2);
     });
   });
 
@@ -100,7 +100,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       const response = await supertest(app).get('/api/flyers/123');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyer);
+      expect(response.body.data).toEqual(mockFlyer);
       expect(db.flyerRepo.getFlyerById).toHaveBeenCalledWith(123);
     });
 
@@ -114,14 +114,14 @@ describe('Flyer Routes (/api/flyers)', () => {
       const response = await supertest(app).get('/api/flyers/999');
 
       expect(response.status).toBe(404);
-      expect(response.body.message).toContain('not found');
+      expect(response.body.error.message).toContain('not found');
     });
 
     it('should return 400 for an invalid flyer ID', async () => {
       const response = await supertest(app).get('/api/flyers/abc');
       expect(response.status).toBe(400);
       // Zod coercion results in NaN for "abc", which triggers a type error before our custom message
-      expect(response.body.errors[0].message).toMatch(
+      expect(response.body.error.details[0].message).toMatch(
         /Invalid flyer ID provided|expected number, received NaN/,
       );
     });
@@ -131,7 +131,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       vi.mocked(db.flyerRepo.getFlyerById).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/flyers/123');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError, flyerId: 123 },
         'Error fetching flyer by ID:',
@@ -147,13 +147,13 @@ describe('Flyer Routes (/api/flyers)', () => {
       const response = await supertest(app).get('/api/flyers/123/items');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyerItems);
+      expect(response.body.data).toEqual(mockFlyerItems);
     });
 
     it('should return 400 for an invalid flyer ID', async () => {
       const response = await supertest(app).get('/api/flyers/abc/items');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(
+      expect(response.body.error.details[0].message).toMatch(
         /Invalid flyer ID provided|expected number, received NaN/,
       );
     });
@@ -163,7 +163,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       vi.mocked(db.flyerRepo.getFlyerItems).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/flyers/123/items');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError, flyerId: 123 },
         'Error fetching flyer items in /api/flyers/:id/items:',
@@ -181,7 +181,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .send({ flyerIds: [1, 2] });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockFlyerItems);
+      expect(response.body.data).toEqual(mockFlyerItems);
     });
 
     it('should return 400 if flyerIds is not an array', async () => {
@@ -189,7 +189,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .post('/api/flyers/items/batch-fetch')
         .send({ flyerIds: 'not-an-array' });
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toMatch(/expected array/);
+      expect(response.body.error.details[0].message).toMatch(/expected array/);
     });
 
     it('should return 400 if flyerIds is an empty array, as per schema validation', async () => {
@@ -198,7 +198,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .send({ flyerIds: [] });
       expect(response.status).toBe(400);
       // Check for the specific Zod error message.
-      expect(response.body.errors[0].message).toBe('flyerIds must be a non-empty array.');
+      expect(response.body.error.details[0].message).toBe('flyerIds must be a non-empty array.');
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -207,7 +207,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .post('/api/flyers/items/batch-fetch')
         .send({ flyerIds: [1] });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -220,7 +220,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .send({ flyerIds: [1, 2, 3] });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ count: 42 });
+      expect(response.body.data).toEqual({ count: 42 });
     });
 
     it('should return 400 if flyerIds is not an array', async () => {
@@ -237,7 +237,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .post('/api/flyers/items/batch-count')
         .send({ flyerIds: [] });
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ count: 0 });
+      expect(response.body.data).toEqual({ count: 0 });
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -246,7 +246,7 @@ describe('Flyer Routes (/api/flyers)', () => {
         .post('/api/flyers/items/batch-count')
         .send({ flyerIds: [1] });
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -317,7 +317,7 @@ describe('Flyer Routes (/api/flyers)', () => {
       const response = await supertest(app)
         .get('/api/flyers')
         .set('X-Test-Rate-Limit-Enable', 'true');
-      
+
       expect(response.status).toBe(200);
       expect(response.headers).toHaveProperty('ratelimit-limit');
       expect(parseInt(response.headers['ratelimit-limit'])).toBe(100);
@@ -350,7 +350,7 @@ describe('Flyer Routes (/api/flyers)', () => {
     it('should apply trackingLimiter to POST /items/:itemId/track', async () => {
       // Mock fire-and-forget promise
       vi.mocked(db.flyerRepo.trackFlyerItemInteraction).mockResolvedValue(undefined);
-      
+
       const response = await supertest(app)
         .post('/api/flyers/items/1/track')
         .set('X-Test-Rate-Limit-Enable', 'true')

src/routes/flyer.routes.ts

@@ -4,11 +4,8 @@ import * as db from '../services/db/index.db';
 import { z } from 'zod';
 import { validateRequest } from '../middleware/validation.middleware';
 import { optionalNumeric } from '../utils/zodUtils';
-import {
-  publicReadLimiter,
-  batchLimiter,
-  trackingLimiter,
-} from '../config/rateLimiters';
+import { publicReadLimiter, batchLimiter, trackingLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -53,34 +50,44 @@ const trackItemSchema = z.object({
 /**
  * GET /api/flyers - Get a paginated list of all flyers.
  */
-router.get('/', publicReadLimiter, validateRequest(getFlyersSchema), async (req, res, next): Promise<void> => {
-  try {
-    // The `validateRequest` middleware ensures `req.query` is valid.
-    // We parse it here to apply Zod's coercions (string to number) and defaults.
-    const { limit, offset } = getFlyersSchema.shape.query.parse(req.query);
+router.get(
+  '/',
+  publicReadLimiter,
+  validateRequest(getFlyersSchema),
+  async (req, res, next): Promise<void> => {
+    try {
+      // The `validateRequest` middleware ensures `req.query` is valid.
+      // We parse it here to apply Zod's coercions (string to number) and defaults.
+      const { limit, offset } = getFlyersSchema.shape.query.parse(req.query);
 
-    const flyers = await db.flyerRepo.getFlyers(req.log, limit, offset);
-    res.json(flyers);
-  } catch (error) {
-    req.log.error({ error }, 'Error fetching flyers in /api/flyers:');
-    next(error);
-  }
-});
+      const flyers = await db.flyerRepo.getFlyers(req.log, limit, offset);
+      sendSuccess(res, flyers);
+    } catch (error) {
+      req.log.error({ error }, 'Error fetching flyers in /api/flyers:');
+      next(error);
+    }
+  },
+);
 
 /**
  * GET /api/flyers/:id - Get a single flyer by its ID.
  */
-router.get('/:id', publicReadLimiter, validateRequest(flyerIdParamSchema), async (req, res, next): Promise<void> => {
-  try {
-    // Explicitly parse to get the coerced number type for `id`.
-    const { id } = flyerIdParamSchema.shape.params.parse(req.params);
-    const flyer = await db.flyerRepo.getFlyerById(id);
-    res.json(flyer);
-  } catch (error) {
-    req.log.error({ error, flyerId: req.params.id }, 'Error fetching flyer by ID:');
-    next(error);
-  }
-});
+router.get(
+  '/:id',
+  publicReadLimiter,
+  validateRequest(flyerIdParamSchema),
+  async (req, res, next): Promise<void> => {
+    try {
+      // Explicitly parse to get the coerced number type for `id`.
+      const { id } = flyerIdParamSchema.shape.params.parse(req.params);
+      const flyer = await db.flyerRepo.getFlyerById(id);
+      sendSuccess(res, flyer);
+    } catch (error) {
+      req.log.error({ error, flyerId: req.params.id }, 'Error fetching flyer by ID:');
+      next(error);
+    }
+  },
+);
 
 /**
  * GET /api/flyers/:id/items - Get all items for a specific flyer.
@@ -90,14 +97,16 @@ router.get(
   publicReadLimiter,
   validateRequest(flyerIdParamSchema),
   async (req, res, next): Promise<void> => {
-    type GetFlyerByIdRequest = z.infer<typeof flyerIdParamSchema>;
     try {
       // Explicitly parse to get the coerced number type for `id`.
       const { id } = flyerIdParamSchema.shape.params.parse(req.params);
       const items = await db.flyerRepo.getFlyerItems(id, req.log);
-      res.json(items);
+      sendSuccess(res, items);
     } catch (error) {
-      req.log.error({ error, flyerId: req.params.id }, 'Error fetching flyer items in /api/flyers/:id/items:');
+      req.log.error(
+        { error, flyerId: req.params.id },
+        'Error fetching flyer items in /api/flyers/:id/items:',
+      );
       next(error);
     }
   },
@@ -117,7 +126,7 @@ router.post(
       // No re-parsing needed here as `validateRequest` has already ensured the body shape,
       // and `express.json()` has parsed it. There's no type coercion to apply.
       const items = await db.flyerRepo.getFlyerItemsForFlyers(body.flyerIds, req.log);
-      res.json(items);
+      sendSuccess(res, items);
     } catch (error) {
       req.log.error({ error }, 'Error fetching batch flyer items');
       next(error);
@@ -139,7 +148,7 @@ router.post(
       // The schema ensures flyerIds is an array of numbers.
       // The `?? []` was redundant as `validateRequest` would have already caught a missing `flyerIds`.
       const count = await db.flyerRepo.countFlyerItemsForFlyers(body.flyerIds, req.log);
-      res.json({ count });
+      sendSuccess(res, { count });
     } catch (error) {
       req.log.error({ error }, 'Error counting batch flyer items');
       next(error);
@@ -150,22 +159,27 @@ router.post(
 /**
  * POST /api/flyers/items/:itemId/track - Tracks a user interaction with a flyer item.
  */
-router.post('/items/:itemId/track', trackingLimiter, validateRequest(trackItemSchema), (req, res, next): void => {
-  try {
-    // Explicitly parse to get coerced types.
-    const { params, body } = trackItemSchema.parse({ params: req.params, body: req.body });
+router.post(
+  '/items/:itemId/track',
+  trackingLimiter,
+  validateRequest(trackItemSchema),
+  (req, res, next): void => {
+    try {
+      // Explicitly parse to get coerced types.
+      const { params, body } = trackItemSchema.parse({ params: req.params, body: req.body });
 
-    // Fire-and-forget: we don't await the tracking call to avoid delaying the response.
-    // We add a .catch to log any potential errors without crashing the server process.
-    db.flyerRepo.trackFlyerItemInteraction(params.itemId, body.type, req.log).catch((error) => {
-      req.log.error({ error, itemId: params.itemId }, 'Flyer item interaction tracking failed');
-    });
+      // Fire-and-forget: we don't await the tracking call to avoid delaying the response.
+      // We add a .catch to log any potential errors without crashing the server process.
+      db.flyerRepo.trackFlyerItemInteraction(params.itemId, body.type, req.log).catch((error) => {
+        req.log.error({ error, itemId: params.itemId }, 'Flyer item interaction tracking failed');
+      });
 
-    res.status(202).send();
-  } catch (error) {
-    // This will catch Zod parsing errors if they occur.
-    next(error);
-  }
-});
+      sendSuccess(res, { message: 'Tracking accepted' }, 202);
+    } catch (error) {
+      // This will catch Zod parsing errors if they occur.
+      next(error);
+    }
+  },
+);
 
 export default router;

src/routes/gamification.routes.test.ts

@@ -8,7 +8,7 @@ import {
   createMockUserAchievement,
   createMockLeaderboardUser,
 } from '../tests/utils/mockFactories';
-import { mockLogger } from '../tests/utils/mockLogger';
+import '../tests/utils/mockLogger';
 import { ForeignKeyConstraintError } from '../services/db/errors.db';
 import { createTestApp } from '../tests/utils/createTestApp';
 
@@ -98,7 +98,7 @@ describe('Gamification Routes (/api/achievements)', () => {
 
       const response = await supertest(unauthenticatedApp).get('/api/achievements');
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockAchievements);
+      expect(response.body.data).toEqual(mockAchievements);
       expect(db.gamificationRepo.getAllAchievements).toHaveBeenCalledWith(expectLogger);
     });
 
@@ -108,7 +108,7 @@ describe('Gamification Routes (/api/achievements)', () => {
 
       const response = await supertest(unauthenticatedApp).get('/api/achievements');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Connection Failed');
+      expect(response.body.error.message).toBe('DB Connection Failed');
     });
 
     it('should return 400 if awarding an achievement to a non-existent user', async () => {
@@ -125,7 +125,7 @@ describe('Gamification Routes (/api/achievements)', () => {
         .post('/api/achievements/award')
         .send({ userId: 'non-existent', achievementName: 'Test Award' });
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('User not found');
+      expect(response.body.error.message).toBe('User not found');
     });
   });
 
@@ -150,7 +150,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       const response = await supertest(authenticatedApp).get('/api/achievements/me');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockUserAchievements);
+      expect(response.body.data).toEqual(mockUserAchievements);
       expect(db.gamificationRepo.getUserAchievements).toHaveBeenCalledWith(
         'user-123',
         expectLogger,
@@ -167,7 +167,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       vi.mocked(db.gamificationRepo.getUserAchievements).mockRejectedValue(dbError);
       const response = await supertest(authenticatedApp).get('/api/achievements/me');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
   });
 
@@ -207,7 +207,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       const response = await supertest(adminApp).post('/api/achievements/award').send(awardPayload);
 
       expect(response.status).toBe(200);
-      expect(response.body.message).toContain('Successfully awarded');
+      expect(response.body.data.message).toContain('Successfully awarded');
       expect(db.gamificationRepo.awardAchievement).toHaveBeenCalledTimes(1);
       expect(db.gamificationRepo.awardAchievement).toHaveBeenCalledWith(
         awardPayload.userId,
@@ -226,7 +226,7 @@ describe('Gamification Routes (/api/achievements)', () => {
 
       const response = await supertest(adminApp).post('/api/achievements/award').send(awardPayload);
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for an invalid userId or achievementName', async () => {
@@ -240,7 +240,7 @@ describe('Gamification Routes (/api/achievements)', () => {
         .post('/api/achievements/award')
         .send({ userId: '', achievementName: '' });
       expect(response.status).toBe(400);
-      expect(response.body.errors).toHaveLength(2);
+      expect(response.body.error.details).toHaveLength(2);
     });
 
     it('should return 400 if userId or achievementName are missing', async () => {
@@ -254,13 +254,13 @@ describe('Gamification Routes (/api/achievements)', () => {
         .post('/api/achievements/award')
         .send({ achievementName: 'Test Award' });
       expect(response1.status).toBe(400);
-      expect(response1.body.errors[0].message).toBe('userId is required.');
+      expect(response1.body.error.details[0].message).toBe('userId is required.');
 
       const response2 = await supertest(adminApp)
         .post('/api/achievements/award')
         .send({ userId: 'user-789' });
       expect(response2.status).toBe(400);
-      expect(response2.body.errors[0].message).toBe('achievementName is required.');
+      expect(response2.body.error.details[0].message).toBe('achievementName is required.');
     });
 
     it('should return 400 if awarding an achievement to a non-existent user', async () => {
@@ -277,7 +277,7 @@ describe('Gamification Routes (/api/achievements)', () => {
         .post('/api/achievements/award')
         .send({ userId: 'non-existent', achievementName: 'Test Award' });
       expect(response.status).toBe(400);
-      expect(response.body.message).toBe('User not found');
+      expect(response.body.error.message).toBe('User not found');
     });
   });
 
@@ -298,7 +298,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       );
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockLeaderboard);
+      expect(response.body.data).toEqual(mockLeaderboard);
       expect(db.gamificationRepo.getLeaderboard).toHaveBeenCalledWith(5, expect.anything());
     });
 
@@ -316,7 +316,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       const response = await supertest(unauthenticatedApp).get('/api/achievements/leaderboard');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockLeaderboard);
+      expect(response.body.data).toEqual(mockLeaderboard);
       expect(db.gamificationRepo.getLeaderboard).toHaveBeenCalledWith(10, expect.anything());
     });
 
@@ -324,7 +324,7 @@ describe('Gamification Routes (/api/achievements)', () => {
       vi.mocked(db.gamificationRepo.getLeaderboard).mockRejectedValue(new Error('DB Error'));
       const response = await supertest(unauthenticatedApp).get('/api/achievements/leaderboard');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
     });
 
     it('should return 400 for an invalid limit parameter', async () => {
@@ -332,8 +332,8 @@ describe('Gamification Routes (/api/achievements)', () => {
         '/api/achievements/leaderboard?limit=100',
       );
       expect(response.status).toBe(400);
-      expect(response.body.errors).toBeDefined();
-      expect(response.body.errors[0].message).toMatch(/less than or equal to 50|Too big/i);
+      expect(response.body.error.details).toBeDefined();
+      expect(response.body.error.details[0].message).toMatch(/less than or equal to 50|Too big/i);
     });
   });
 

src/routes/gamification.routes.ts

@@ -13,11 +13,8 @@ import { validateRequest } from '../middleware/validation.middleware';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { requiredString, optionalNumeric } from '../utils/zodUtils';
 // All route handlers now use req.log (request-scoped logger) as per ADR-004
-import {
-  publicReadLimiter,
-  userReadLimiter,
-  adminTriggerLimiter,
-} from '../config/rateLimiters';
+import { publicReadLimiter, userReadLimiter, adminTriggerLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = express.Router();
 const adminGamificationRouter = express.Router(); // Create a new router for admin-only routes.
@@ -48,7 +45,7 @@ const awardAchievementSchema = z.object({
 router.get('/', publicReadLimiter, async (req, res, next: NextFunction) => {
   try {
     const achievements = await gamificationService.getAllAchievements(req.log);
-    res.json(achievements);
+    sendSuccess(res, achievements);
   } catch (error) {
     req.log.error({ error }, 'Error fetching all achievements in /api/achievements:');
     next(error);
@@ -69,7 +66,7 @@ router.get(
       // We parse it here to apply Zod's coercions (string to number) and defaults.
       const { limit } = leaderboardQuerySchema.parse(req.query);
       const leaderboard = await gamificationService.getLeaderboard(limit!, req.log);
-      res.json(leaderboard);
+      sendSuccess(res, leaderboard);
     } catch (error) {
       req.log.error({ error }, 'Error fetching leaderboard:');
       next(error);
@@ -94,7 +91,7 @@ router.get(
         userProfile.user.user_id,
         req.log,
       );
-      res.json(userAchievements);
+      sendSuccess(res, userAchievements);
     } catch (error) {
       req.log.error(
         { error, userId: userProfile.user.user_id },
@@ -124,11 +121,9 @@ adminGamificationRouter.post(
     const { body } = req as unknown as AwardAchievementRequest;
     try {
       await gamificationService.awardAchievement(body.userId, body.achievementName, req.log);
-      res
-        .status(200)
-        .json({
-          message: `Successfully awarded '${body.achievementName}' to user ${body.userId}.`,
-        });
+      sendSuccess(res, {
+        message: `Successfully awarded '${body.achievementName}' to user ${body.userId}.`,
+      });
     } catch (error) {
       next(error);
     }

src/routes/health.routes.test.ts

@@ -64,7 +64,7 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.text).toBe('pong');
+      expect(response.body.data.message).toBe('pong');
     });
   });
 
@@ -78,10 +78,8 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert: Check for the correct status and response body.
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({
-        success: true,
-        message: 'Redis connection is healthy.',
-      });
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.message).toBe('Redis connection is healthy.');
     });
 
     it('should return 500 if Redis ping fails', async () => {
@@ -94,7 +92,7 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Connection timed out');
+      expect(response.body.error.message).toBe('Connection timed out');
     });
 
     it('should return 500 if Redis ping returns an unexpected response', async () => {
@@ -106,7 +104,7 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Unexpected Redis ping response: OK');
+      expect(response.body.error.message).toContain('Unexpected Redis ping response: OK');
     });
   });
 
@@ -122,9 +120,9 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(200);
-      expect(response.body.currentTime).toBe('2024-03-15T10:30:00.000Z');
-      expect(response.body.year).toBe(2024);
-      expect(response.body.week).toBe(11);
+      expect(response.body.data.currentTime).toBe('2024-03-15T10:30:00.000Z');
+      expect(response.body.data.year).toBe(2024);
+      expect(response.body.data.week).toBe(11);
     });
   });
 
@@ -139,7 +137,7 @@ describe('Health Routes (/api/health)', () => {
       // Assert
       expect(response.status).toBe(200);
       expect(response.body.success).toBe(true);
-      expect(response.body.message).toBe('All required database tables exist.');
+      expect(response.body.data.message).toBe('All required database tables exist.');
     });
 
     it('should return 500 if tables are missing', async () => {
@@ -149,7 +147,9 @@ describe('Health Routes (/api/health)', () => {
       const response = await supertest(app).get('/api/health/db-schema');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Missing tables: missing_table_1, missing_table_2');
+      expect(response.body.error.message).toContain(
+        'Missing tables: missing_table_1, missing_table_2',
+      );
       // The error is passed to next(), so the global error handler would log it, not the route handler itself.
     });
 
@@ -161,10 +161,12 @@ describe('Health Routes (/api/health)', () => {
       const response = await supertest(app).get('/api/health/db-schema');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB connection failed'); // This is the message from the original error
-      expect(response.body.stack).toBeDefined();
-      expect(response.body.errorId).toEqual(expect.any(String));
-      console.log('[DEBUG] health.routes.test.ts: Verifying logger.error for DB schema check failure');
+      expect(response.body.error.message).toBe('DB connection failed'); // This is the message from the original error
+      expect(response.body.error.details.stack).toBeDefined();
+      expect(response.body.meta.requestId).toEqual(expect.any(String));
+      console.log(
+        '[DEBUG] health.routes.test.ts: Verifying logger.error for DB schema check failure',
+      );
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.any(Error),
@@ -181,8 +183,8 @@ describe('Health Routes (/api/health)', () => {
       const response = await supertest(app).get('/api/health/db-schema');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB connection failed'); // This is the message from the original error
-      expect(response.body.errorId).toEqual(expect.any(String));
+      expect(response.body.error.message).toBe('DB connection failed'); // This is the message from the original error
+      expect(response.body.meta.requestId).toEqual(expect.any(String));
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.objectContaining({ message: 'DB connection failed' }),
@@ -203,7 +205,7 @@ describe('Health Routes (/api/health)', () => {
       // Assert
       expect(response.status).toBe(200);
       expect(response.body.success).toBe(true);
-      expect(response.body.message).toContain('is accessible and writable');
+      expect(response.body.data.message).toContain('is accessible and writable');
     });
 
     it('should return 500 if storage is not accessible or writable', async () => {
@@ -216,7 +218,7 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Storage check failed.');
+      expect(response.body.error.message).toContain('Storage check failed.');
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.any(Error),
@@ -235,7 +237,7 @@ describe('Health Routes (/api/health)', () => {
 
       // Assert
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Storage check failed.');
+      expect(response.body.error.message).toContain('Storage check failed.');
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.any(Error),
@@ -260,7 +262,7 @@ describe('Health Routes (/api/health)', () => {
       // Assert
       expect(response.status).toBe(200);
       expect(response.body.success).toBe(true);
-      expect(response.body.message).toContain('Pool Status: 10 total, 8 idle, 1 waiting.');
+      expect(response.body.data.message).toContain('Pool Status: 10 total, 8 idle, 1 waiting.');
     });
 
     it('should return 500 for an unhealthy pool status', async () => {
@@ -277,8 +279,8 @@ describe('Health Routes (/api/health)', () => {
       // Assert
       expect(response.status).toBe(500);
       expect(response.body.success).toBe(false);
-      expect(response.body.message).toContain('Pool may be under stress.');
-      expect(response.body.message).toContain('Pool Status: 20 total, 5 idle, 15 waiting.');
+      expect(response.body.error.message).toContain('Pool may be under stress.');
+      expect(response.body.error.message).toContain('Pool Status: 20 total, 5 idle, 15 waiting.');
       expect(logger.warn).toHaveBeenCalledWith(
         'Database pool health check shows high waiting count: 15',
       );
@@ -295,8 +297,8 @@ describe('Health Routes (/api/health)', () => {
     const response = await supertest(app).get('/api/health/db-pool');
 
     expect(response.status).toBe(500);
-    expect(response.body.message).toBe('Pool is not initialized'); // This is the message from the original error
-    expect(response.body.errorId).toEqual(expect.any(String));
+    expect(response.body.error.message).toBe('Pool is not initialized'); // This is the message from the original error
+    expect(response.body.meta.requestId).toEqual(expect.any(String));
     expect(mockLogger.error).toHaveBeenCalledWith(
       expect.objectContaining({
         err: expect.any(Error),
@@ -315,9 +317,9 @@ describe('Health Routes (/api/health)', () => {
     const response = await supertest(app).get('/api/health/db-pool');
 
     expect(response.status).toBe(500);
-    expect(response.body.message).toBe('Pool is not initialized'); // This is the message from the original error
-    expect(response.body.stack).toBeDefined();
-    expect(response.body.errorId).toEqual(expect.any(String));
+    expect(response.body.error.message).toBe('Pool is not initialized'); // This is the message from the original error
+    expect(response.body.error.details.stack).toBeDefined();
+    expect(response.body.meta.requestId).toEqual(expect.any(String));
     expect(mockLogger.error).toHaveBeenCalledWith(
       expect.objectContaining({
         err: expect.objectContaining({ message: 'Pool is not initialized' }),
@@ -334,10 +336,12 @@ describe('Health Routes (/api/health)', () => {
       const response = await supertest(app).get('/api/health/redis');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Connection timed out');
-      expect(response.body.stack).toBeDefined();
-      expect(response.body.errorId).toEqual(expect.any(String));
-      console.log('[DEBUG] health.routes.test.ts: Checking if logger.error was called with the correct pattern');
+      expect(response.body.error.message).toBe('Connection timed out');
+      expect(response.body.error.details.stack).toBeDefined();
+      expect(response.body.meta.requestId).toEqual(expect.any(String));
+      console.log(
+        '[DEBUG] health.routes.test.ts: Checking if logger.error was called with the correct pattern',
+      );
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.any(Error),
@@ -352,9 +356,9 @@ describe('Health Routes (/api/health)', () => {
       const response = await supertest(app).get('/api/health/redis');
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toContain('Unexpected Redis ping response: OK');
-      expect(response.body.stack).toBeDefined();
-      expect(response.body.errorId).toEqual(expect.any(String));
+      expect(response.body.error.message).toContain('Unexpected Redis ping response: OK');
+      expect(response.body.error.details.stack).toBeDefined();
+      expect(response.body.meta.requestId).toEqual(expect.any(String));
       expect(mockLogger.error).toHaveBeenCalledWith(
         expect.objectContaining({
           err: expect.any(Error),

src/routes/health.routes.ts

@@ -1,21 +1,126 @@
 // src/routes/health.routes.ts
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
+/**
+ * @file Health check endpoints implementing ADR-020: Health Checks and Liveness/Readiness Probes.
+ *
+ * Provides endpoints for:
+ * - Liveness probe (/live) - Is the server process running?
+ * - Readiness probe (/ready) - Is the server ready to accept traffic?
+ * - Individual service health checks (db, redis, storage)
+ */
 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';
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
-import { checkTablesExist, getPoolStatus } from '../services/db/connection.db';
-// Removed: import { logger } from '../services/logger.server';
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
+import { checkTablesExist, getPoolStatus, getPool } from '../services/db/connection.db';
 import { connection as redisConnection } from '../services/queueService.server';
 import fs from 'node:fs/promises';
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { getSimpleWeekAndYear } from '../utils/dateUtils';
-// All route handlers now use req.log (request-scoped logger) as per ADR-004
 import { validateRequest } from '../middleware/validation.middleware';
+import { sendSuccess, sendError, ErrorCode } from '../utils/apiResponse';
 
 const router = Router();
 
+// --- Types for Health Check Response ---
+
+interface ServiceHealth {
+  status: 'healthy' | 'degraded' | 'unhealthy';
+  latency?: number;
+  message?: string;
+  details?: Record<string, unknown>;
+}
+
+interface ReadinessResponse {
+  status: 'healthy' | 'degraded' | 'unhealthy';
+  timestamp: string;
+  uptime: number;
+  services: {
+    database: ServiceHealth;
+    redis: ServiceHealth;
+    storage: ServiceHealth;
+  };
+}
+
+// --- Helper Functions ---
+
+/**
+ * Checks database connectivity with timing.
+ */
+async function checkDatabase(): Promise<ServiceHealth> {
+  const start = Date.now();
+  try {
+    const pool = getPool();
+    await pool.query('SELECT 1');
+    const latency = Date.now() - start;
+    const poolStatus = getPoolStatus();
+
+    // Consider degraded if waiting connections > 3
+    const status = poolStatus.waitingCount > 3 ? 'degraded' : 'healthy';
+
+    return {
+      status,
+      latency,
+      details: {
+        totalConnections: poolStatus.totalCount,
+        idleConnections: poolStatus.idleCount,
+        waitingConnections: poolStatus.waitingCount,
+      },
+    };
+  } catch (error) {
+    return {
+      status: 'unhealthy',
+      latency: Date.now() - start,
+      message: error instanceof Error ? error.message : 'Database connection failed',
+    };
+  }
+}
+
+/**
+ * Checks Redis connectivity with timing.
+ */
+async function checkRedis(): Promise<ServiceHealth> {
+  const start = Date.now();
+  try {
+    const reply = await redisConnection.ping();
+    const latency = Date.now() - start;
+
+    if (reply === 'PONG') {
+      return { status: 'healthy', latency };
+    }
+    return {
+      status: 'unhealthy',
+      latency,
+      message: `Unexpected ping response: ${reply}`,
+    };
+  } catch (error) {
+    return {
+      status: 'unhealthy',
+      latency: Date.now() - start,
+      message: error instanceof Error ? error.message : 'Redis connection failed',
+    };
+  }
+}
+
+/**
+ * Checks storage accessibility.
+ */
+async function checkStorage(): Promise<ServiceHealth> {
+  const storagePath =
+    process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
+  const start = Date.now();
+  try {
+    await fs.access(storagePath, fs.constants.W_OK);
+    return {
+      status: 'healthy',
+      latency: Date.now() - start,
+      details: { path: storagePath },
+    };
+  } catch {
+    return {
+      status: 'unhealthy',
+      latency: Date.now() - start,
+      message: `Storage not accessible: ${storagePath}`,
+    };
+  }
+}
+
 // --- Zod Schemas for Health Routes (as per ADR-003) ---
 // These routes do not expect any input, so we define empty schemas
 // to maintain a consistent validation pattern across the application.
@@ -25,7 +130,105 @@ const emptySchema = z.object({});
  * GET /api/health/ping - A simple endpoint to check if the server is responsive.
  */
 router.get('/ping', validateRequest(emptySchema), (_req: Request, res: Response) => {
-  res.status(200).send('pong');
+  return sendSuccess(res, { message: 'pong' });
+});
+
+// =============================================================================
+// KUBERNETES PROBES (ADR-020)
+// =============================================================================
+
+/**
+ * GET /api/health/live - Liveness probe for container orchestration.
+ *
+ * Returns 200 OK if the server process is running.
+ * If this fails, the orchestrator should restart the container.
+ *
+ * This endpoint is intentionally simple and has no external dependencies.
+ * It only checks that the Node.js process can handle HTTP requests.
+ */
+router.get('/live', validateRequest(emptySchema), (_req: Request, res: Response) => {
+  return sendSuccess(res, {
+    status: 'ok',
+    timestamp: new Date().toISOString(),
+  });
+});
+
+/**
+ * GET /api/health/ready - Readiness probe for container orchestration.
+ *
+ * Returns 200 OK if the server is ready to accept traffic.
+ * Checks all critical dependencies (database, Redis).
+ * If this fails, the orchestrator should remove the container from the load balancer.
+ *
+ * Response includes detailed status of each service for debugging.
+ */
+router.get('/ready', validateRequest(emptySchema), async (req: Request, res: Response) => {
+  // Check all services in parallel for speed
+  const [database, redis, storage] = await Promise.all([
+    checkDatabase(),
+    checkRedis(),
+    checkStorage(),
+  ]);
+
+  // Determine overall status
+  // - 'healthy' if all critical services (db, redis) are healthy
+  // - 'degraded' if any service is degraded but none unhealthy
+  // - 'unhealthy' if any critical service is unhealthy
+  const criticalServices = [database, redis];
+  const allServices = [database, redis, storage];
+
+  let overallStatus: 'healthy' | 'degraded' | 'unhealthy' = 'healthy';
+
+  if (criticalServices.some((s) => s.status === 'unhealthy')) {
+    overallStatus = 'unhealthy';
+  } else if (allServices.some((s) => s.status === 'degraded')) {
+    overallStatus = 'degraded';
+  }
+
+  const response: ReadinessResponse = {
+    status: overallStatus,
+    timestamp: new Date().toISOString(),
+    uptime: process.uptime(),
+    services: {
+      database,
+      redis,
+      storage,
+    },
+  };
+
+  // Return appropriate HTTP status code
+  // 200 = healthy or degraded (can still handle traffic)
+  // 503 = unhealthy (should not receive traffic)
+  if (overallStatus === 'unhealthy') {
+    return sendError(res, ErrorCode.SERVICE_UNAVAILABLE, 'Service unhealthy', 503, response);
+  }
+  return sendSuccess(res, response);
+});
+
+/**
+ * GET /api/health/startup - Startup probe for container orchestration.
+ *
+ * Similar to readiness but used during container startup.
+ * The orchestrator will not send liveness/readiness probes until this succeeds.
+ * This allows for longer initialization times without triggering restarts.
+ */
+router.get('/startup', validateRequest(emptySchema), async (req: Request, res: Response) => {
+  // For startup, we only check database connectivity
+  // Redis and storage can be checked later in readiness
+  const database = await checkDatabase();
+
+  if (database.status === 'unhealthy') {
+    return sendError(res, ErrorCode.SERVICE_UNAVAILABLE, 'Waiting for database connection', 503, {
+      status: 'starting',
+      database,
+    });
+  }
+
+  return sendSuccess(res, {
+    status: 'started',
+    timestamp: new Date().toISOString(),
+    database,
+  });
 });
 
 /**
@@ -43,13 +246,14 @@ router.get('/db-schema', validateRequest(emptySchema), async (req, res, next: Ne
         new Error(`Database schema check failed. Missing tables: ${missingTables.join(', ')}.`),
       );
     }
-    return res.status(200).json({ success: true, message: 'All required database tables exist.' });
+    return sendSuccess(res, { message: 'All required database tables exist.' });
   } catch (error: unknown) {
     if (error instanceof Error) {
       return next(error);
     }
     const message =
-      (error as any)?.message || 'An unknown error occurred during DB schema check.';
+      (error as { message?: string })?.message ||
+      'An unknown error occurred during DB schema check.';
     return next(new Error(message));
   }
 });
@@ -59,16 +263,14 @@ router.get('/db-schema', validateRequest(emptySchema), async (req, res, next: Ne
  * This is important for features like file uploads.
  */
 router.get('/storage', validateRequest(emptySchema), async (req, res, next: NextFunction) => {
-  const storagePath = process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
+  const storagePath =
+    process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
   try {
     await fs.access(storagePath, fs.constants.W_OK); // Use fs.promises
-    return res
-      .status(200)
-      .json({
-        success: true,
-        message: `Storage directory '${storagePath}' is accessible and writable.`,
-      });
-  } catch (error: unknown) {
+    return sendSuccess(res, {
+      message: `Storage directory '${storagePath}' is accessible and writable.`,
+    });
+  } catch {
     next(
       new Error(
         `Storage check failed. Ensure the directory '${storagePath}' exists and is writable by the application.`,
@@ -91,19 +293,24 @@ router.get(
       const message = `Pool Status: ${status.totalCount} total, ${status.idleCount} idle, ${status.waitingCount} waiting.`;
 
       if (isHealthy) {
-        return res.status(200).json({ success: true, message });
+        return sendSuccess(res, { message, ...status });
       } else {
         req.log.warn(`Database pool health check shows high waiting count: ${status.waitingCount}`);
-        return res
-          .status(500)
-          .json({ success: false, message: `Pool may be under stress. ${message}` });
+        return sendError(
+          res,
+          ErrorCode.INTERNAL_ERROR,
+          `Pool may be under stress. ${message}`,
+          500,
+          status,
+        );
       }
     } catch (error: unknown) {
       if (error instanceof Error) {
         return next(error);
       }
       const message =
-        (error as any)?.message || 'An unknown error occurred during DB pool check.';
+        (error as { message?: string })?.message ||
+        'An unknown error occurred during DB pool check.';
       return next(new Error(message));
     }
   },
@@ -116,7 +323,7 @@ router.get(
 router.get('/time', validateRequest(emptySchema), (req: Request, res: Response) => {
   const now = new Date();
   const { year, week } = getSimpleWeekAndYear(now);
-  res.json({
+  return sendSuccess(res, {
     currentTime: now.toISOString(),
     year,
     week,
@@ -133,7 +340,7 @@ router.get(
     try {
       const reply = await redisConnection.ping();
       if (reply === 'PONG') {
-        return res.status(200).json({ success: true, message: 'Redis connection is healthy.' });
+        return sendSuccess(res, { message: 'Redis connection is healthy.' });
       }
       throw new Error(`Unexpected Redis ping response: ${reply}`); // This will be caught below
     } catch (error: unknown) {
@@ -141,7 +348,8 @@ router.get(
         return next(error);
       }
       const message =
-        (error as any)?.message || 'An unknown error occurred during Redis health check.';
+        (error as { message?: string })?.message ||
+        'An unknown error occurred during Redis health check.';
       return next(new Error(message));
     }
   },

src/routes/personalization.routes.test.ts

@@ -40,18 +40,22 @@ describe('Personalization Routes (/api/personalization)', () => {
       const mockItems = [createMockMasterGroceryItem({ master_grocery_item_id: 1, name: 'Milk' })];
       vi.mocked(db.personalizationRepo.getAllMasterItems).mockResolvedValue(mockItems);
 
-      const response = await supertest(app).get('/api/personalization/master-items').set('x-test-rate-limit-enable', 'true');
+      const response = await supertest(app)
+        .get('/api/personalization/master-items')
+        .set('x-test-rate-limit-enable', 'true');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockItems);
+      expect(response.body.data).toEqual(mockItems);
     });
 
     it('should return 500 if the database call fails', async () => {
       const dbError = new Error('DB Error');
       vi.mocked(db.personalizationRepo.getAllMasterItems).mockRejectedValue(dbError);
-      const response = await supertest(app).get('/api/personalization/master-items').set('x-test-rate-limit-enable', 'true');
+      const response = await supertest(app)
+        .get('/api/personalization/master-items')
+        .set('x-test-rate-limit-enable', 'true');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching master items in /api/personalization/master-items:',
@@ -67,7 +71,7 @@ describe('Personalization Routes (/api/personalization)', () => {
       const response = await supertest(app).get('/api/personalization/dietary-restrictions');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockRestrictions);
+      expect(response.body.data).toEqual(mockRestrictions);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -75,7 +79,7 @@ describe('Personalization Routes (/api/personalization)', () => {
       vi.mocked(db.personalizationRepo.getDietaryRestrictions).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/personalization/dietary-restrictions');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching dietary restrictions in /api/personalization/dietary-restrictions:',
@@ -91,7 +95,7 @@ describe('Personalization Routes (/api/personalization)', () => {
       const response = await supertest(app).get('/api/personalization/appliances');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockAppliances);
+      expect(response.body.data).toEqual(mockAppliances);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -99,7 +103,7 @@ describe('Personalization Routes (/api/personalization)', () => {
       vi.mocked(db.personalizationRepo.getAppliances).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/personalization/appliances');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching appliances in /api/personalization/appliances:',

src/routes/personalization.routes.ts

@@ -4,6 +4,7 @@ import { z } from 'zod';
 import * as db from '../services/db/index.db';
 import { validateRequest } from '../middleware/validation.middleware';
 import { publicReadLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -28,7 +29,7 @@ router.get(
       res.set('Cache-Control', 'public, max-age=3600');
 
       const masterItems = await db.personalizationRepo.getAllMasterItems(req.log);
-      res.json(masterItems);
+      sendSuccess(res, masterItems);
     } catch (error) {
       req.log.error({ error }, 'Error fetching master items in /api/personalization/master-items:');
       next(error);
@@ -46,7 +47,7 @@ router.get(
   async (req: Request, res: Response, next: NextFunction) => {
     try {
       const restrictions = await db.personalizationRepo.getDietaryRestrictions(req.log);
-      res.json(restrictions);
+      sendSuccess(res, restrictions);
     } catch (error) {
       req.log.error(
         { error },
@@ -67,7 +68,7 @@ router.get(
   async (req: Request, res: Response, next: NextFunction) => {
     try {
       const appliances = await db.personalizationRepo.getAppliances(req.log);
-      res.json(appliances);
+      sendSuccess(res, appliances);
     } catch (error) {
       req.log.error({ error }, 'Error fetching appliances in /api/personalization/appliances:');
       next(error);

src/routes/price.routes.test.ts

@@ -22,16 +22,14 @@ vi.mock('../services/logger.server', async () => ({
 // Mock the passport middleware
 vi.mock('./passport.routes', () => ({
   default: {
-    authenticate: vi.fn(
-      (_strategy, _options) => (req: Request, res: Response, next: NextFunction) => {
-        // If req.user is not set by the test setup, simulate unauthenticated access.
-        if (!req.user) {
-          return res.status(401).json({ message: 'Unauthorized' });
-        }
-        // If req.user is set, proceed as an authenticated user.
-        next();
-      },
-    ),
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      // If req.user is not set by the test setup, simulate unauthenticated access.
+      if (!req.user) {
+        return res.status(401).json({ message: 'Unauthorized' });
+      }
+      // If req.user is set, proceed as an authenticated user.
+      next();
+    }),
   },
 }));
 
@@ -41,7 +39,11 @@ import { priceRepo } from '../services/db/price.db';
 
 describe('Price Routes (/api/price-history)', () => {
   const mockUser = createMockUserProfile({ user: { user_id: 'price-user-123' } });
-  const app = createTestApp({ router: priceRouter, basePath: '/api/price-history', authenticatedUser: mockUser });
+  const app = createTestApp({
+    router: priceRouter,
+    basePath: '/api/price-history',
+    authenticatedUser: mockUser,
+  });
   beforeEach(() => {
     vi.clearAllMocks();
   });
@@ -59,7 +61,7 @@ describe('Price Routes (/api/price-history)', () => {
         .send({ masterItemIds: [1, 2] });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockHistory);
+      expect(response.body.data).toEqual(mockHistory);
       expect(priceRepo.getPriceHistory).toHaveBeenCalledWith([1, 2], expect.any(Object), 1000, 0);
     });
 
@@ -69,12 +71,7 @@ describe('Price Routes (/api/price-history)', () => {
         .post('/api/price-history')
         .send({ masterItemIds: [1, 2, 3], limit: 50, offset: 10 });
 
-      expect(priceRepo.getPriceHistory).toHaveBeenCalledWith(
-        [1, 2, 3],
-        expect.any(Object),
-        50,
-        10,
-      );
+      expect(priceRepo.getPriceHistory).toHaveBeenCalledWith([1, 2, 3], expect.any(Object), 50, 10);
     });
 
     it('should log the request info', async () => {
@@ -98,14 +95,14 @@ describe('Price Routes (/api/price-history)', () => {
         .send({ masterItemIds: [1, 2, 3] });
 
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('Database connection failed');
+      expect(response.body.error.message).toBe('Database connection failed');
     });
 
     it('should return 400 if masterItemIds is an empty array', async () => {
       const response = await supertest(app).post('/api/price-history').send({ masterItemIds: [] });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe(
+      expect(response.body.error.details[0].message).toBe(
         'masterItemIds must be a non-empty array of positive integers.',
       );
     });
@@ -117,7 +114,9 @@ describe('Price Routes (/api/price-history)', () => {
 
       expect(response.status).toBe(400);
       // The actual message is "Invalid input: expected array, received string"
-      expect(response.body.errors[0].message).toBe('Invalid input: expected array, received string');
+      expect(response.body.error.details[0].message).toBe(
+        'Invalid input: expected array, received string',
+      );
     });
 
     it('should return 400 if masterItemIds contains non-positive integers', async () => {
@@ -126,7 +125,7 @@ describe('Price Routes (/api/price-history)', () => {
         .send({ masterItemIds: [1, -2, 3] });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('Number must be greater than 0');
+      expect(response.body.error.details[0].message).toBe('Number must be greater than 0');
     });
 
     it('should return 400 if masterItemIds is missing', async () => {
@@ -134,7 +133,9 @@ describe('Price Routes (/api/price-history)', () => {
 
       expect(response.status).toBe(400);
       // The actual message is "Invalid input: expected array, received undefined"
-      expect(response.body.errors[0].message).toBe('Invalid input: expected array, received undefined');
+      expect(response.body.error.details[0].message).toBe(
+        'Invalid input: expected array, received undefined',
+      );
     });
 
     it('should return 400 for invalid limit and offset', async () => {
@@ -143,10 +144,12 @@ describe('Price Routes (/api/price-history)', () => {
         .send({ masterItemIds: [1], limit: -1, offset: 'abc' });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors).toHaveLength(2);
+      expect(response.body.error.details).toHaveLength(2);
       // The actual message is "Too small: expected number to be >0"
-      expect(response.body.errors[0].message).toBe('Too small: expected number to be >0');
-      expect(response.body.errors[1].message).toBe('Invalid input: expected number, received NaN');
+      expect(response.body.error.details[0].message).toBe('Too small: expected number to be >0');
+      expect(response.body.error.details[1].message).toBe(
+        'Invalid input: expected number, received NaN',
+      );
     });
   });
 

src/routes/price.routes.ts

@@ -6,16 +6,15 @@ import { validateRequest } from '../middleware/validation.middleware';
 import { priceRepo } from '../services/db/price.db';
 import { optionalNumeric } from '../utils/zodUtils';
 import { priceHistoryLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = Router();
 
 const priceHistorySchema = z.object({
   body: z.object({
-    masterItemIds: z
-      .array(z.number().int().positive('Number must be greater than 0'))
-      .nonempty({
-        message: 'masterItemIds must be a non-empty array of positive integers.',
-      }),
+    masterItemIds: z.array(z.number().int().positive('Number must be greater than 0')).nonempty({
+      message: 'masterItemIds must be a non-empty array of positive integers.',
+    }),
     limit: optionalNumeric({ default: 1000, integer: true, positive: true }),
     offset: optionalNumeric({ default: 0, integer: true, nonnegative: true }),
   }),
@@ -44,7 +43,7 @@ router.post(
     );
     try {
       const priceHistory = await priceRepo.getPriceHistory(masterItemIds, req.log, limit, offset);
-      res.status(200).json(priceHistory);
+      sendSuccess(res, priceHistory);
     } catch (error) {
       next(error);
     }

src/routes/reactions.routes.test.ts

@@ -1,7 +1,9 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import supertest from 'supertest';
+import type { Request, Response, NextFunction } from 'express';
 import { createTestApp } from '../tests/utils/createTestApp';
 import { createMockUserProfile } from '../tests/utils/mockFactories';
+import type { UserReaction } from '../types';
 
 // 1. Mock the Service Layer directly.
 vi.mock('../services/db/index.db', () => ({
@@ -20,15 +22,13 @@ vi.mock('../services/logger.server', async () => ({
 // Mock Passport middleware
 vi.mock('./passport.routes', () => ({
   default: {
-    authenticate: vi.fn(
-      () => (req: any, res: any, next: any) => {
-        // If we are testing the unauthenticated state (no user injected), simulate 401.
-        if (!req.user) {
-          return res.status(401).json({ message: 'Unauthorized' });
-        }
-        next();
-      },
-    ),
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      // If we are testing the unauthenticated state (no user injected), simulate 401.
+      if (!req.user) {
+        return res.status(401).json({ message: 'Unauthorized' });
+      }
+      next();
+    }),
   },
 }));
 
@@ -51,20 +51,24 @@ describe('Reaction Routes (/api/reactions)', () => {
     const app = createTestApp({ router: reactionsRouter, basePath: '/api/reactions' });
 
     it('should return a list of reactions', async () => {
-      const mockReactions = [{ id: 1, reaction_type: 'like', entity_id: '123' }];
-      vi.mocked(reactionRepo.getReactions).mockResolvedValue(mockReactions as any);
+      const mockReactions = [
+        { reaction_id: 1, reaction_type: 'like', entity_id: '123' },
+      ] as unknown as UserReaction[];
+      vi.mocked(reactionRepo.getReactions).mockResolvedValue(mockReactions);
 
       const response = await supertest(app).get('/api/reactions');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockReactions);
+      expect(response.body.data).toEqual(mockReactions);
       expect(reactionRepo.getReactions).toHaveBeenCalledWith({}, expectLogger);
     });
 
     it('should filter by query parameters', async () => {
-      const mockReactions = [{ id: 1, reaction_type: 'like' }];
-      vi.mocked(reactionRepo.getReactions).mockResolvedValue(mockReactions as any);
-      
+      const mockReactions = [
+        { reaction_id: 1, reaction_type: 'like' },
+      ] as unknown as UserReaction[];
+      vi.mocked(reactionRepo.getReactions).mockResolvedValue(mockReactions);
+
       const validUuid = '123e4567-e89b-12d3-a456-426614174000';
       const query = { userId: validUuid, entityType: 'recipe', entityId: '1' };
 
@@ -73,7 +77,7 @@ describe('Reaction Routes (/api/reactions)', () => {
       expect(response.status).toBe(200);
       expect(reactionRepo.getReactions).toHaveBeenCalledWith(
         expect.objectContaining(query),
-        expectLogger
+        expectLogger,
       );
     });
 
@@ -84,10 +88,7 @@ describe('Reaction Routes (/api/reactions)', () => {
       const response = await supertest(app).get('/api/reactions');
 
       expect(response.status).toBe(500);
-      expect(mockLogger.error).toHaveBeenCalledWith(
-        { error },
-        'Error fetching user reactions'
-      );
+      expect(mockLogger.error).toHaveBeenCalledWith({ error }, 'Error fetching user reactions');
     });
   });
 
@@ -95,26 +96,25 @@ describe('Reaction Routes (/api/reactions)', () => {
     const app = createTestApp({ router: reactionsRouter, basePath: '/api/reactions' });
 
     it('should return reaction summary for an entity', async () => {
-      const mockSummary = { like: 10, love: 5 };
-      vi.mocked(reactionRepo.getReactionSummary).mockResolvedValue(mockSummary as any);
+      const mockSummary = [
+        { reaction_type: 'like', count: 10 },
+        { reaction_type: 'love', count: 5 },
+      ];
+      vi.mocked(reactionRepo.getReactionSummary).mockResolvedValue(mockSummary);
 
       const response = await supertest(app)
         .get('/api/reactions/summary')
         .query({ entityType: 'recipe', entityId: '123' });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockSummary);
-      expect(reactionRepo.getReactionSummary).toHaveBeenCalledWith(
-        'recipe',
-        '123',
-        expectLogger
-      );
+      expect(response.body.data).toEqual(mockSummary);
+      expect(reactionRepo.getReactionSummary).toHaveBeenCalledWith('recipe', '123', expectLogger);
     });
 
     it('should return 400 if required parameters are missing', async () => {
       const response = await supertest(app).get('/api/reactions/summary');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('required');
+      expect(response.body.error.details[0].message).toContain('required');
     });
 
     it('should return 500 on database error', async () => {
@@ -126,10 +126,7 @@ describe('Reaction Routes (/api/reactions)', () => {
         .query({ entityType: 'recipe', entityId: '123' });
 
       expect(response.status).toBe(500);
-      expect(mockLogger.error).toHaveBeenCalledWith(
-        { error },
-        'Error fetching reaction summary'
-      );
+      expect(mockLogger.error).toHaveBeenCalledWith({ error }, 'Error fetching reaction summary');
     });
   });
 
@@ -148,18 +145,20 @@ describe('Reaction Routes (/api/reactions)', () => {
     };
 
     it('should return 201 when a reaction is added', async () => {
-      const mockResult = { ...validBody, id: 1, user_id: 'user-123' };
-      vi.mocked(reactionRepo.toggleReaction).mockResolvedValue(mockResult as any);
+      const mockResult = {
+        ...validBody,
+        reaction_id: 1,
+        user_id: 'user-123',
+      } as unknown as UserReaction;
+      vi.mocked(reactionRepo.toggleReaction).mockResolvedValue(mockResult);
 
-      const response = await supertest(app)
-        .post('/api/reactions/toggle')
-        .send(validBody);
+      const response = await supertest(app).post('/api/reactions/toggle').send(validBody);
 
       expect(response.status).toBe(201);
-      expect(response.body).toEqual({ message: 'Reaction added.', reaction: mockResult });
+      expect(response.body.data).toEqual({ message: 'Reaction added.', reaction: mockResult });
       expect(reactionRepo.toggleReaction).toHaveBeenCalledWith(
         { user_id: 'user-123', ...validBody },
-        expectLogger
+        expectLogger,
       );
     });
 
@@ -167,12 +166,10 @@ describe('Reaction Routes (/api/reactions)', () => {
       // Returning null/false from toggleReaction implies the reaction was removed
       vi.mocked(reactionRepo.toggleReaction).mockResolvedValue(null);
 
-      const response = await supertest(app)
-        .post('/api/reactions/toggle')
-        .send(validBody);
+      const response = await supertest(app).post('/api/reactions/toggle').send(validBody);
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ message: 'Reaction removed.' });
+      expect(response.body.data).toEqual({ message: 'Reaction removed.' });
     });
 
     it('should return 400 if body is invalid', async () => {
@@ -181,14 +178,12 @@ describe('Reaction Routes (/api/reactions)', () => {
         .send({ entity_type: 'recipe' }); // Missing other required fields
 
       expect(response.status).toBe(400);
-      expect(response.body.errors).toBeDefined();
+      expect(response.body.error.details).toBeDefined();
     });
 
     it('should return 401 if not authenticated', async () => {
       const unauthApp = createTestApp({ router: reactionsRouter, basePath: '/api/reactions' });
-      const response = await supertest(unauthApp)
-        .post('/api/reactions/toggle')
-        .send(validBody);
+      const response = await supertest(unauthApp).post('/api/reactions/toggle').send(validBody);
 
       expect(response.status).toBe(401);
     });
@@ -197,14 +192,12 @@ describe('Reaction Routes (/api/reactions)', () => {
       const error = new Error('DB Error');
       vi.mocked(reactionRepo.toggleReaction).mockRejectedValue(error);
 
-      const response = await supertest(app)
-        .post('/api/reactions/toggle')
-        .send(validBody);
+      const response = await supertest(app).post('/api/reactions/toggle').send(validBody);
 
       expect(response.status).toBe(500);
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error, body: validBody },
-        'Error toggling user reaction'
+        'Error toggling user reaction',
       );
     });
   });
@@ -240,4 +233,4 @@ describe('Reaction Routes (/api/reactions)', () => {
       expect(parseInt(response.headers['ratelimit-limit'])).toBe(150);
     });
   });
-});
+});

src/routes/reactions.routes.ts

@@ -6,6 +6,7 @@ import passport from './passport.routes';
 import { requiredString } from '../utils/zodUtils';
 import { UserProfile } from '../types';
 import { publicReadLimiter, reactionToggleLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -49,7 +50,7 @@ router.get(
     try {
       const { query } = getReactionsSchema.parse({ query: req.query });
       const reactions = await reactionRepo.getReactions(query, req.log);
-      res.json(reactions);
+      sendSuccess(res, reactions);
     } catch (error) {
       req.log.error({ error }, 'Error fetching user reactions');
       next(error);
@@ -69,8 +70,12 @@ router.get(
   async (req: Request, res: Response, next: NextFunction) => {
     try {
       const { query } = getReactionSummarySchema.parse({ query: req.query });
-      const summary = await reactionRepo.getReactionSummary(query.entityType, query.entityId, req.log);
-      res.json(summary);
+      const summary = await reactionRepo.getReactionSummary(
+        query.entityType,
+        query.entityId,
+        req.log,
+      );
+      sendSuccess(res, summary);
     } catch (error) {
       req.log.error({ error }, 'Error fetching reaction summary');
       next(error);
@@ -99,9 +104,9 @@ router.post(
       };
       const result = await reactionRepo.toggleReaction(reactionData, req.log);
       if (result) {
-        res.status(201).json({ message: 'Reaction added.', reaction: result });
+        sendSuccess(res, { message: 'Reaction added.', reaction: result }, 201);
       } else {
-        res.status(200).json({ message: 'Reaction removed.' });
+        sendSuccess(res, { message: 'Reaction removed.' });
       }
     } catch (error) {
       req.log.error({ error, body }, 'Error toggling user reaction');
@@ -110,4 +115,4 @@ router.post(
   },
 );
 
-export default router;
+export default router;

src/routes/recipe.routes.test.ts

@@ -1,7 +1,12 @@
 // src/routes/recipe.routes.test.ts
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import supertest from 'supertest';
-import { createMockRecipe, createMockRecipeComment, createMockUserProfile } from '../tests/utils/mockFactories';
+import type { Request, Response, NextFunction } from 'express';
+import {
+  createMockRecipe,
+  createMockRecipeComment,
+  createMockUserProfile,
+} from '../tests/utils/mockFactories';
 import { NotFoundError } from '../services/db/errors.db';
 import { createTestApp } from '../tests/utils/createTestApp';
 
@@ -26,14 +31,12 @@ vi.mock('../services/aiService.server', () => ({
 // Mock Passport
 vi.mock('./passport.routes', () => ({
   default: {
-    authenticate: vi.fn(
-      () => (req: any, res: any, next: any) => {
-        if (!req.user) {
-          return res.status(401).json({ message: 'Unauthorized' });
-        }
-        next();
-      },
-    ),
+    authenticate: vi.fn(() => (req: Request, res: Response, next: NextFunction) => {
+      if (!req.user) {
+        return res.status(401).json({ message: 'Unauthorized' });
+      }
+      next();
+    }),
   },
 }));
 
@@ -70,7 +73,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       const response = await supertest(app).get('/api/recipes/by-sale-percentage?minPercentage=75');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockRecipes);
+      expect(response.body.data).toEqual(mockRecipes);
       expect(db.recipeRepo.getRecipesBySalePercentage).toHaveBeenCalledWith(75, expectLogger);
     });
 
@@ -85,7 +88,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       vi.mocked(db.recipeRepo.getRecipesBySalePercentage).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/recipes/by-sale-percentage');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching recipes in /api/recipes/by-sale-percentage:',
@@ -97,7 +100,7 @@ describe('Recipe Routes (/api/recipes)', () => {
         '/api/recipes/by-sale-percentage?minPercentage=101',
       );
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('Too big');
+      expect(response.body.error.details[0].message).toContain('Too big');
     });
   });
 
@@ -120,7 +123,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       vi.mocked(db.recipeRepo.getRecipesByMinSaleIngredients).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/recipes/by-sale-ingredients');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching recipes in /api/recipes/by-sale-ingredients:',
@@ -132,7 +135,7 @@ describe('Recipe Routes (/api/recipes)', () => {
         '/api/recipes/by-sale-ingredients?minIngredients=abc',
       );
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('received NaN');
+      expect(response.body.error.details[0].message).toContain('received NaN');
     });
   });
 
@@ -146,7 +149,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       );
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockRecipes);
+      expect(response.body.data).toEqual(mockRecipes);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -156,7 +159,7 @@ describe('Recipe Routes (/api/recipes)', () => {
         '/api/recipes/by-ingredient-and-tag?ingredient=chicken&tag=quick',
       );
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching recipes in /api/recipes/by-ingredient-and-tag:',
@@ -168,7 +171,7 @@ describe('Recipe Routes (/api/recipes)', () => {
         '/api/recipes/by-ingredient-and-tag?ingredient=chicken',
       );
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toBe('Query parameter "tag" is required.');
+      expect(response.body.error.details[0].message).toBe('Query parameter "tag" is required.');
     });
   });
 
@@ -180,14 +183,14 @@ describe('Recipe Routes (/api/recipes)', () => {
       const response = await supertest(app).get('/api/recipes/1/comments');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockComments);
+      expect(response.body.data).toEqual(mockComments);
       expect(db.recipeRepo.getRecipeComments).toHaveBeenCalledWith(1, expectLogger);
     });
 
     it('should return an empty array if recipe has no comments', async () => {
       vi.mocked(db.recipeRepo.getRecipeComments).mockResolvedValue([]);
       const response = await supertest(app).get('/api/recipes/2/comments');
-      expect(response.body).toEqual([]);
+      expect(response.body.data).toEqual([]);
     });
 
     it('should return 500 if the database call fails', async () => {
@@ -195,7 +198,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       vi.mocked(db.recipeRepo.getRecipeComments).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/recipes/1/comments');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         `Error fetching comments for recipe ID 1:`,
@@ -205,7 +208,7 @@ describe('Recipe Routes (/api/recipes)', () => {
     it('should return 400 for an invalid recipeId', async () => {
       const response = await supertest(app).get('/api/recipes/abc/comments');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('received NaN');
+      expect(response.body.error.details[0].message).toContain('received NaN');
     });
   });
 
@@ -217,7 +220,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       const response = await supertest(app).get('/api/recipes/456');
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual(mockRecipe);
+      expect(response.body.data).toEqual(mockRecipe);
       expect(db.recipeRepo.getRecipeById).toHaveBeenCalledWith(456, expectLogger);
     });
 
@@ -226,7 +229,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       vi.mocked(db.recipeRepo.getRecipeById).mockRejectedValue(notFoundError);
       const response = await supertest(app).get('/api/recipes/999');
       expect(response.status).toBe(404);
-      expect(response.body.message).toContain('not found');
+      expect(response.body.error.message).toContain('not found');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: notFoundError },
         `Error fetching recipe ID 999:`,
@@ -238,7 +241,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       vi.mocked(db.recipeRepo.getRecipeById).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/recipes/456');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         `Error fetching recipe ID 456:`,
@@ -248,7 +251,7 @@ describe('Recipe Routes (/api/recipes)', () => {
     it('should return 400 for an invalid recipeId', async () => {
       const response = await supertest(app).get('/api/recipes/abc');
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('received NaN');
+      expect(response.body.error.details[0].message).toContain('received NaN');
     });
   });
 
@@ -265,12 +268,10 @@ describe('Recipe Routes (/api/recipes)', () => {
       const mockSuggestion = 'Chicken and Rice Casserole...';
       vi.mocked(aiService.generateRecipeSuggestion).mockResolvedValue(mockSuggestion);
 
-      const response = await supertest(authApp)
-        .post('/api/recipes/suggest')
-        .send({ ingredients });
+      const response = await supertest(authApp).post('/api/recipes/suggest').send({ ingredients });
 
       expect(response.status).toBe(200);
-      expect(response.body).toEqual({ suggestion: mockSuggestion });
+      expect(response.body.data).toEqual({ suggestion: mockSuggestion });
       expect(aiService.generateRecipeSuggestion).toHaveBeenCalledWith(ingredients, expectLogger);
     });
 
@@ -282,7 +283,7 @@ describe('Recipe Routes (/api/recipes)', () => {
         .send({ ingredients: ['water'] });
 
       expect(response.status).toBe(503);
-      expect(response.body.message).toContain('unavailable');
+      expect(response.body.error.message).toContain('unavailable');
     });
 
     it('should return 400 if ingredients list is empty', async () => {
@@ -291,7 +292,9 @@ describe('Recipe Routes (/api/recipes)', () => {
         .send({ ingredients: [] });
 
       expect(response.status).toBe(400);
-      expect(response.body.errors[0].message).toContain('At least one ingredient is required');
+      expect(response.body.error.details[0].message).toContain(
+        'At least one ingredient is required',
+      );
     });
 
     it('should return 401 if not authenticated', async () => {
@@ -314,7 +317,7 @@ describe('Recipe Routes (/api/recipes)', () => {
       expect(response.status).toBe(500);
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error },
-        'Error generating recipe suggestion'
+        'Error generating recipe suggestion',
       );
     });
   });

src/routes/recipe.routes.ts

@@ -7,6 +7,7 @@ import passport from './passport.routes';
 import { validateRequest } from '../middleware/validation.middleware';
 import { requiredString, numericIdParam, optionalNumeric } from '../utils/zodUtils';
 import { publicReadLimiter, suggestionLimiter } from '../config/rateLimiters';
+import { sendSuccess, sendError, ErrorCode } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -49,7 +50,7 @@ router.get(
       // Explicitly parse req.query to apply coercion (string -> number) and default values
       const { query } = bySalePercentageSchema.parse({ query: req.query });
       const recipes = await db.recipeRepo.getRecipesBySalePercentage(query.minPercentage!, req.log);
-      res.json(recipes);
+      sendSuccess(res, recipes);
     } catch (error) {
       req.log.error({ error }, 'Error fetching recipes in /api/recipes/by-sale-percentage:');
       next(error);
@@ -72,7 +73,7 @@ router.get(
         query.minIngredients!,
         req.log,
       );
-      res.json(recipes);
+      sendSuccess(res, recipes);
     } catch (error) {
       req.log.error({ error }, 'Error fetching recipes in /api/recipes/by-sale-ingredients:');
       next(error);
@@ -95,7 +96,7 @@ router.get(
         query.tag,
         req.log,
       );
-      res.json(recipes);
+      sendSuccess(res, recipes);
     } catch (error) {
       req.log.error({ error }, 'Error fetching recipes in /api/recipes/by-ingredient-and-tag:');
       next(error);
@@ -106,32 +107,42 @@ router.get(
 /**
  * GET /api/recipes/:recipeId/comments - Get all comments for a specific recipe.
  */
-router.get('/:recipeId/comments', publicReadLimiter, validateRequest(recipeIdParamsSchema), async (req, res, next) => {
-  try {
-    // Explicitly parse req.params to coerce recipeId to a number
-    const { params } = recipeIdParamsSchema.parse({ params: req.params });
-    const comments = await db.recipeRepo.getRecipeComments(params.recipeId, req.log);
-    res.json(comments);
-  } catch (error) {
-    req.log.error({ error }, `Error fetching comments for recipe ID ${req.params.recipeId}:`);
-    next(error);
-  }
-});
+router.get(
+  '/:recipeId/comments',
+  publicReadLimiter,
+  validateRequest(recipeIdParamsSchema),
+  async (req, res, next) => {
+    try {
+      // Explicitly parse req.params to coerce recipeId to a number
+      const { params } = recipeIdParamsSchema.parse({ params: req.params });
+      const comments = await db.recipeRepo.getRecipeComments(params.recipeId, req.log);
+      sendSuccess(res, comments);
+    } catch (error) {
+      req.log.error({ error }, `Error fetching comments for recipe ID ${req.params.recipeId}:`);
+      next(error);
+    }
+  },
+);
 
 /**
  * GET /api/recipes/:recipeId - Get a single recipe by its ID, including ingredients and tags.
  */
-router.get('/:recipeId', publicReadLimiter, validateRequest(recipeIdParamsSchema), async (req, res, next) => {
-  try {
-    // Explicitly parse req.params to coerce recipeId to a number
-    const { params } = recipeIdParamsSchema.parse({ params: req.params });
-    const recipe = await db.recipeRepo.getRecipeById(params.recipeId, req.log);
-    res.json(recipe);
-  } catch (error) {
-    req.log.error({ error }, `Error fetching recipe ID ${req.params.recipeId}:`);
-    next(error);
-  }
-});
+router.get(
+  '/:recipeId',
+  publicReadLimiter,
+  validateRequest(recipeIdParamsSchema),
+  async (req, res, next) => {
+    try {
+      // Explicitly parse req.params to coerce recipeId to a number
+      const { params } = recipeIdParamsSchema.parse({ params: req.params });
+      const recipe = await db.recipeRepo.getRecipeById(params.recipeId, req.log);
+      sendSuccess(res, recipe);
+    } catch (error) {
+      req.log.error({ error }, `Error fetching recipe ID ${req.params.recipeId}:`);
+      next(error);
+    }
+  },
+);
 
 /**
  * POST /api/recipes/suggest - Generates a simple recipe suggestion from a list of ingredients.
@@ -148,12 +159,15 @@ router.post(
       const suggestion = await aiService.generateRecipeSuggestion(body.ingredients, req.log);
 
       if (!suggestion) {
-        return res
-          .status(503)
-          .json({ message: 'AI service is currently unavailable or failed to generate a suggestion.' });
+        return sendError(
+          res,
+          ErrorCode.SERVICE_UNAVAILABLE,
+          'AI service is currently unavailable or failed to generate a suggestion.',
+          503,
+        );
       }
 
-      res.json({ suggestion });
+      sendSuccess(res, { suggestion });
     } catch (error) {
       req.log.error({ error }, 'Error generating recipe suggestion');
       next(error);

src/routes/stats.routes.test.ts

@@ -52,7 +52,7 @@ describe('Stats Routes (/api/stats)', () => {
       vi.mocked(db.adminRepo.getMostFrequentSaleItems).mockRejectedValue(dbError);
       const response = await supertest(app).get('/api/stats/most-frequent-sales');
       expect(response.status).toBe(500);
-      expect(response.body.message).toBe('DB Error');
+      expect(response.body.error.message).toBe('DB Error');
       expect(mockLogger.error).toHaveBeenCalledWith(
         { error: dbError },
         'Error fetching most frequent sale items in /api/stats/most-frequent-sales:',
@@ -62,8 +62,8 @@ describe('Stats Routes (/api/stats)', () => {
     it('should return 400 for invalid query parameters', async () => {
       const response = await supertest(app).get('/api/stats/most-frequent-sales?days=0&limit=abc');
       expect(response.status).toBe(400);
-      expect(response.body.errors).toBeDefined();
-      expect(response.body.errors.length).toBe(2);
+      expect(response.body.error.details).toBeDefined();
+      expect(response.body.error.details.length).toBe(2);
     });
   });
 

src/routes/stats.routes.ts

@@ -5,6 +5,7 @@ import * as db from '../services/db/index.db';
 import { validateRequest } from '../middleware/validation.middleware';
 import { optionalNumeric } from '../utils/zodUtils';
 import { publicReadLimiter } from '../config/rateLimiters';
+import { sendSuccess } from '../utils/apiResponse';
 
 const router = Router();
 
@@ -34,7 +35,7 @@ router.get(
       // We parse it here to apply Zod's coercions (string to number) and defaults.
       const { days, limit } = statsQuerySchema.parse(req.query);
       const items = await db.adminRepo.getMostFrequentSaleItems(days!, limit!, req.log);
-      res.json(items);
+      sendSuccess(res, items);
     } catch (error) {
       req.log.error(
         { error },