- afterMove: use boardSlot for firework/flash colors (not player index)
- afterMove: in local-multi, ANY human capturing triggers celebration
  (not just player 0)
- botLoop: capture detection checks all human players in local-multi
  (not just myPlayerIndex=0)
- animateDice: shake dice-area for all human players in local-multi
  (previously only shook for player 0, panel for others)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>