feat: Add GlitchTip error monitoring with Sentry SDK

- Install @sentry/nextjs
- Add sentry.client.config.ts, sentry.server.config.ts, sentry.edge.config.ts
- Conditional initialization based on GLITCHTIP_DSN env variable
- Add /api/glitchtip-tunnel route to bypass ad blockers
- Update next.config.mjs with withSentryConfig wrapper
- Integrate Sentry.captureException in error.tsx and global-error.tsx
- Support env vars: GLITCHTIP_DSN, NEXT_PUBLIC_GLITCHTIP_DSN, GLITCHTIP_URL, etc.

sentry.edge.config.ts

@@ -0,0 +1,21 @@
+import * as Sentry from "@sentry/nextjs";
+
+const GLITCHTIP_DSN = process.env.GLITCHTIP_DSN || process.env.NEXT_PUBLIC_GLITCHTIP_DSN;
+
+// Only initialize Sentry if DSN is configured
+if (GLITCHTIP_DSN) {
+    Sentry.init({
+        dsn: GLITCHTIP_DSN,
+
+        // Environment
+        environment: process.env.NODE_ENV,
+
+        // Sample rate for error events (1.0 = 100%)
+        sampleRate: 1.0,
+
+        // Performance monitoring sample rate (lower for edge)
+        tracesSampleRate: 0.05,
+    });
+
+    console.log("[Sentry] Edge initialized with GlitchTip");
+}