feat: integrate Sentry error monitoring

.env.example

@@ -19,3 +19,14 @@ FIREBASE_PRIVATE_KEY=
 GEMINI_API_KEY=
 GEMINI_MODEL=gemini-2.5-flash
 GEMINI_EMBEDDING_MODEL=gemini-embedding-001
+
+# Upstash Redis (API Rate Limiting - Server-only)
+UPSTASH_REDIS_REST_URL=
+UPSTASH_REDIS_REST_TOKEN=
+
+# PostHog Telemetry (Client-side)
+NEXT_PUBLIC_POSTHOG_KEY=
+NEXT_PUBLIC_POSTHOG_HOST=https://us.i.posthog.com
+
+# Sentry Monitoring (Client/Server)
+NEXT_PUBLIC_SENTRY_DSN=

next.config.js

@@ -1,3 +1,6 @@
+// Injected content via Sentry Wizard
+const { withSentryConfig } = require("@sentry/nextjs");
+
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   reactStrictMode: true,
@@ -24,5 +27,40 @@ const nextConfig = {
   },
 }
 
-module.exports = nextConfig
+module.exports = withSentryConfig(
+  nextConfig,
+  {
+    // For all available options, see:
+    // https://github.com/getsentry/sentry-webpack-plugin#options
+
+    // Suppresses source map uploading logs during bundling
+    silent: true,
+    org: "dumpit",
+    project: "dumpit",
+  },
+  {
+    // For all available options, see:
+    // https://docs.sentry.io/platforms/javascript/guides/nextjs/manual-setup/
+
+    // Upload a larger set of source maps for prettier stack traces (increases build time)
+    widenClientSandbox: true,
+
+    // Transpiles SDK to be compatible with a wider range of browsers
+    transpileClientSDK: true,
+
+    // Routes Sentry events through our own developer tunnel to circumvent ad blockers
+    tunnelRoute: "/monitoring",
+
+    // Hides source maps from visitors
+    hideSourceMaps: true,
+
+    // Automatically tree-shakes Sentry logger statements to reduce bundle size
+    disableLogger: true,
+
+    // Enables automatic instrumentation of Vercel Cron Monitors.
+    // See the readme for more information to avoid race conditions:
+    // https://github.com/getsentry/sentry-javascript/public-sharing-ui/tree/main/packages/nextjs#vercel-cron-monitors-support
+    automaticVercelMonitors: true,
+  }
+);