Add full application structure with auth, dashboard, and Docker

- Add Dockerfile for production deployment
- Add authentication pages (login, signup)
- Add dashboard layout and navigation
- Add project pages with chat component
- Add shadcn/ui components
- Add Supabase client configuration
- Add middleware for auth protection
- Update next.config.ts for standalone output

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/supabase/client.ts

@@ -0,0 +1,9 @@
+import { createBrowserClient } from '@supabase/ssr'
+import type { Database } from '@/types/database'
+
+export function createClient() {
+  return createBrowserClient<Database>(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!
+  )
+}