Bug fixes:
- @Synchronized on ElevenLabsStreamingTts.sendText/finish to prevent
sentFullText/sentTextLength races across OkHttp and caller threads
- Pre-set pendingRunId via onRunIdKnown callback before chat.send to
eliminate race where gateway events arrive before runId is stored
- Track drain coroutine as Job; cancel prior on rapid mic toggle to
prevent duplicate TTS and stale transcript sends
- Mic button disabled during 2s drain cooldown (micCooldown StateFlow)
Codex review fixes:
- Gate agent streaming TTS on sessionKey to prevent cross-session
audio leaks (P1)
- Clear ElevenLabs credentials when talk.provider is not elevenlabs;
gate streaming TTS on activeProviderIsElevenLabs (P2)
System TTS fallback fixes:
- Null streamingTts immediately in finishStreamingTts so next response
gets a fresh TTS instance
- Add hasReceivedAudio flag to ElevenLabsStreamingTts to detect when
WebSocket connects but returns no audio (invalid key, network error)
- Fall back to playTtsForText when streaming TTS produced no audio
- Track ttsJob to cleanly cancel prior playTtsForText on new response
- Re-throw CancellationException instead of cascading into fallback
attempts that also get cancelled
587790e84a