Redesign chat UI and fix MedGemma generation config issues

Fix requirements: opencv-headless (no libGL needed), remove unused gradio, add faiss-cpu and huggingface_hub

Copy mcp_server/ into Docker image

Include mcp_server/ in Docker image — required at runtime for tool calls

Pass HF_TOKEN explicitly to pipeline() for gated model auth

Use HF_TOKEN env var to authenticate for gated MedGemma model

Fix Dockerfile: install curl before using it for NodeSource setup

Migrate FAISS index to Git LFS

Track FAISS index via Git LFS

Add HF Spaces Dockerfile, Git LFS for model weights

Initial commit — SkinProAI dermoscopic analysis platform