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/dashboard/widgets/recent-activity-widget.tsx

@@ -0,0 +1,22 @@
+'use client';
+
+import { Activity } from 'lucide-react';
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+
+export function RecentActivityWidget() {
+  return (
+    <Card className="h-full border-0 shadow-none">
+      <CardHeader className="p-0 pb-3">
+        <CardTitle className="flex items-center gap-2 text-base">
+          <Activity className="h-4 w-4" aria-hidden="true" />
+          Recent Activity
+        </CardTitle>
+      </CardHeader>
+      <CardContent className="p-0">
+        <p className="text-sm text-muted-foreground">
+          Activity feed coming soon
+        </p>
+      </CardContent>
+    </Card>
+  );
+}