feat(theme): dual light/dark mode with Apple light theme, toggle, and theme-aware viewers

Remove light/dark theme toggle (dark-only app), drop ThemeProvider + darkMode config, add accent-hover token

named exports, any->unknown, theme toggle (light/dark), dark mode fixes, error extractor, deleted pipline/ typo dir

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

Re-enable OAuth: restore auth pages, Providers wrapper, dashboard auth guard, landing page CTA

Core pipeline testability: progress callback, rate limiter 429, history table

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