feat(design): bioluminescent green+violet palette and re-tuned landing hero

feat(alignment): show matched/mismatched/gaps/length stats across all alignment views via shared AlignmentStatsBar

fix: convert AlignmentView.tsx light-theme classes to dark void theme tokens

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