[UI] Add hypothesis comparison view to Exchange
Task ID: ee42db51-6055-4dc0-b0a0-8b1de86ebf65
Layer: UI
Priority: 85
Goal
Allow selecting 2-3 hypotheses from Exchange to compare side-by-side with radar charts, evidence details, scores, and debate excerpts.
Implementation
Added compare checkboxes to hypothesis rows on /exchange (max 3)
Floating compare bar at bottom with "Compare Side-by-Side" button
Enhanced /compare page with:
- Side-by-side summary cards
- Chart.js radar chart showing all 10 scoring dimensions
- Score breakdown table with best-in-class highlighting
- Debate excerpt comparison
Work Log
- 2026-04-02: Implemented all features