- Backend: remove static file serving, API-only
- Backend: CORS updated to allow Vercel domains
- Dockerfile: remove frontend copy, pure API image
- Frontend: VITE_API_URL env var for HF Space URL
- Frontend: vercel.json with SPA rewrite rules
- Frontend: .env.example with setup instructions
fix: replace libgl1-mesa-glx with libgl1 for Debian trixie
