- Added missing data-panel="chess" HTML section for field rendering
- Reorganized sidebar into logical groups with Arabic headers:
  عام (General): Colors, Spacing, UI, Assets, Icons, Bots
  شطرنج (Chess): Board Colors, Game Styling, Pieces, Move Classes
  ألعاب أخرى (Other Games): Ludo, Domino, Backgammon
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>