Patient-level chat UI with streaming AI analysis pipeline:
- MedGemma visual examination with stage-by-stage cascade
- ConvNeXt classifier with confidence scores and differential
- MONET feature extraction and Grad-CAM attention maps
- Temporal comparison between sequential lesion images
- Persistent chat history with full cascade replay on reload
- FastAPI backend with SSE streaming + React/TypeScript frontend
- Docker build ready for Hugging Face Spaces deployment
