- Add 4 Ludo pawn sprite upload slots (red/green/yellow/blue) to admin branding
- Add 15 sound effect upload slots (mp3/ogg/wav) with audio preview
- Add 25 missing emoji slots (crown, mute, block, hourglass, etc.)
- Ludo game.js: draw custom pawn sprites with same bounce/highlight animation
- Ludo game.js: pawn colors now respect branding ludo_red/green/yellow/blue
- audio.js: plays custom audio files if uploaded, falls back to synthesized sounds
- branding.php: support audio MIME types for Supabase storage upload
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>