fix: backend-only deployment branch - removed all frontend files from root

fix: backend-only Docker configuration for Phase 1 validation

fix: expose OpenEnv endpoints on port 7860 to satisfy hackathon validator

fix: resolve externally-managed-environment error by using python venv in Docker

fix: NODE_ENV=production was silently skipping devDeps during Docker build - move to runtime only, add lightningcss

Fix Dockerfile working directory for frontend

Fix missing backend requirements path

Add root route for HF Space homepage

Add root route for HF Space homepage

Fix HF Space runtime by adding persistent FastAPI server

Initial lightweight hackathon submission