refactor: migrate to monorepo structure with Docker, PocketBase, and e2e tests

- Reorganize into apps/, packages/, docs/, e2e/, pocketbase/ directories
- Add Dockerfiles for web, worker, and PocketBase services
- Add docker-compose.yml for local orchestration
- Add turbo.json for monorepo task management
- Add Playwright e2e test infrastructure
- Add PocketBase backend with migrations
- Remove Vite/Next.js/ESLint/PostCSS config files
- Update package.json with workspace dependencies
- Add .env.example and .dockerignore

apps/web/components/web-vitals-tracker.tsx

@@ -0,0 +1,12 @@
+'use client';
+
+import { useWebVitals } from '@/hooks/use-web-vitals';
+
+/**
+ * Thin client component that hooks Web Vitals tracking into the layout.
+ * Kept separate so the layout itself stays a server component.
+ */
+export function WebVitalsTracker() {
+  useWebVitals();
+  return null;
+}