CI: Rewrite workflow — lightweight validation without torch/transformers dependency

Fix CI: Remove deleted build.py reference from deploy workflow

revert: restore backend to 1a76471, keep all UI/UX improvements

feat: P1-P3 improvements + auto re-analyze after apply

Use bayan10 HuggingFace org for Spaces deployment

Switch backend from Render to HuggingFace Spaces (free, no card required)

authDone Ready for deployment