Added audioTimeout() to audio/context.ts — tracked timer set cleared on
scene destroy via clearAllAudioTimers(). Converted 20 sfx.ts + 3 voice.ts
raw setTimeout calls to audioTimeout. Converted FightScene playEntrance
timeout to trackedTimeout. Remaining setTimeout in tts.ts worker layer
and music.ts (already tracked via setMusicTimeout) are self-managing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
13 silent catch handlers replaced with descriptive console.warn logging
across 6 frontend files. No silent error swallowing remains.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>