- Ludo: 4-player support with CSS-only board (15x15 grid), bot AI
  (easy/hard), local pass-and-play, multiplayer via Supabase Realtime,
  in-game chat, matchmaking, private rooms, mixed human+bot games
- Theme editor: admin panel at /admin/theme with 9 categories,
  color pickers, file uploads, DB persistence, global cache
- CSS vars: unified all hardcoded colors across the codebase
  (chess board, analysis, bots, overlays, arrows, eval bar)
- New files: ludo-constants, ludo-ui, ludo-bot, ludo-game, ludo-live,
  ludo-chat, api/ludo, api/theme, pages/ludo*, admin-theme
- DB: ludo_matches + ludo_queue tables with RLS policies
- Nav: added Ludo icon to sprite.svg and both nav menus
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>