Speed up CPU inference: halve token limits, pre-download models, fix OMP threads

Use bfloat16 on CPU to halve memory (8GB vs 16GB float32)

Fix MCP subprocess deadlock: use stderr=None instead of PIPE

Add timeout and stderr logging to MCP subprocess to debug tool hangs

Remove unused files: old Gradio frontend, dead model code, test artifacts

Force MCP tool models to CPU to avoid GPU VRAM contention with MedGemma

Add RAG Phase 4 management guidance, rebuild guidelines index (286 chunks), post-analysis hint UI

Use dtype instead of deprecated torch_dtype in model_kwargs

Redesign chat UI and fix MedGemma generation config issues

Pass HF_TOKEN explicitly to pipeline() for gated model auth

Use HF_TOKEN env var to authenticate for gated MedGemma model

Add HF Spaces Dockerfile, Git LFS for model weights

Initial commit — SkinProAI dermoscopic analysis platform