chore: force clean Vercel rebuild to pick up NEXT_PUBLIC_API_URL

feat: molecular docking (AutoDock Vina) + docs site + Sentry + cache stats + Phase 2 docs update

Deploy prep: Render config + Dockerfile, refactored backend auth flow, dashboard, landing page, error states, guest flow

Initial commit: Bio Nexus pipeline engine — BLAST + UniProt + AlphaFold + AI interpretation (Phase 1)