fix: FeaturedTopics — use is_featured filter + English edits label

design: /contribute page — DESIGN_GUIDE compliant, no emoji

✨ Open Debates section: debated claims with pro/con citations

design: LatestResearch DESIGN_GUIDE compliant

design: ClaimBlock edit modal — dark theme, formal tone, DESIGN_GUIDE compliant

design: professional dark-navy redesign per DESIGN_GUIDE.md

✨ Homepage: 2-column Leaderboard + Latest Research layout

✨ Wiki v3: Paper-based narrative claims as default view

fix: remove onMouseOver/onMouseOut from server component page.tsx

✨ Claim edit proposals + evidence-required + voting system

✨ Add Suggest Edit + How to Contribute + /contribute guide

✨ Wiki: National Geographic hero layout + LLM hero data

fix: upgrade tsconfig target to es2017 for spread operator support

✨ Graph: dark theme + featured nodes + responsive nav

✨ Q&A: Category tags + difficulty filters + improved UI