- Unified speakAsync/speakAsyncWithRate into _speakAsyncCore with:
- 500ms startup check: bail immediately if speech won't start (mobile/no gesture)
- 8s safety timeout (down from 15s) to prevent blocking
- iOS-safe keepalive: only do Chrome pause/resume workaround on desktop Chrome
- Immediate bail when no voices loaded
- Sprite loading: 5s timeout per sprite prevents mobile hangs from stuck Image decodes
- Scene creation: 10s timeout in FightViewer so overlay/voice flow continues even if
canvas fails on mobile
- playRound: bail gracefully if fighter sprites missing instead of crashing
- Global audio unlock: first touch/click on site unlocks AudioContext + SpeechSynthesis
- Practice button pre-unlocks audio while still in user gesture context
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
