Fix HF Spaces TGI launch entrypoint to avoid unexpected argument error

Fix TGI endpoint plumbing and use full TGI runtime image in Dockerfile

Add TGI integration for cloud LLM serving

Update to Node 20 for better React 19 compatibility

Fix Dockerfile with multi-stage build for frontend

Update Dockerfile to build frontend for Spaces deployment

Production-ready: add server/app.py with fallback-safe /reset, fix Dockerfile, add HF metadata, add task JSON files

Initial commit