Sergei 9f12830850 Improve STT quality and add session/chat management
- Switch Android STT from on-device to cloud recognition for better accuracy
- Add lastMessageWasVoiceRef to prevent TTS for text-typed messages
- Stop voice session and clear chat when changing Deployment or Voice API
- Ensures clean state when switching between beneficiaries/models
2026-01-29 18:29:00 -08:00
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