feat: add Sentry source map upload configuration and update environment variables

vite.config.ts

@@ -2,6 +2,7 @@
 import path from 'path';
 import { defineConfig } from 'vitest/config';
 import react from '@vitejs/plugin-react';
+import { sentryVitePlugin } from '@sentry/vite-plugin';
 
 // Ensure NODE_ENV is set to 'test' for all Vitest runs.
 process.env.NODE_ENV = 'test';
@@ -10,6 +11,13 @@ process.on('unhandledRejection', (reason, promise) => {
   console.error('Unhandled Rejection at:', promise, 'reason:', reason);
 });
 
+/**
+ * Determines if we should enable Sentry source map uploads.
+ * Only enabled during production builds with the required environment variables.
+ */
+const shouldUploadSourceMaps =
+  process.env.VITE_SENTRY_DSN && process.env.SENTRY_AUTH_TOKEN && process.env.NODE_ENV !== 'test';
+
 /**
  * This is the main configuration file for Vite and the Vitest 'unit' test project.
  * When running `vitest`, it is orchestrated by `vitest.workspace.ts`, which
@@ -18,7 +26,40 @@ process.on('unhandledRejection', (reason, promise) => {
 export default defineConfig({
   // Vite-specific configuration for the dev server, build, etc.
   // This is inherited by all Vitest projects.
-  plugins: [react()],
+  build: {
+    // Generate source maps for production builds (hidden = not referenced in built files)
+    // The Sentry plugin will upload them and then delete them
+    sourcemap: shouldUploadSourceMaps ? 'hidden' : false,
+  },
+  plugins: [
+    react(),
+    // Conditionally add Sentry plugin for production builds with source map upload
+    ...(shouldUploadSourceMaps
+      ? [
+          sentryVitePlugin({
+            // URL of the Bugsink instance (Sentry-compatible)
+            // This is read from SENTRY_URL env var or falls back to the DSN's origin
+            url: process.env.SENTRY_URL,
+
+            // Org and project are required by the API but Bugsink ignores them
+            // when using debug ID matching (Bugsink 1.5+)
+            org: 'flyer-crawler',
+            project: 'flyer-crawler-frontend',
+
+            // Auth token from environment variable
+            authToken: process.env.SENTRY_AUTH_TOKEN,
+
+            sourcemaps: {
+              // Delete source maps after upload to prevent public exposure
+              filesToDeleteAfterUpload: ['./dist/**/*.map'],
+            },
+
+            // Disable telemetry to Sentry
+            telemetry: false,
+          }),
+        ]
+      : []),
+  ],
   server: {
     port: 3000,
     host: '0.0.0.0',