- Add TTS provider selection (Gleez vs Mistral) in Settings
- Add Mistral API key configuration option in Settings
- Implement Mistral TTS API integration in MainActivity
- Add provider-specific voice options for both Gleez and Mistral
- Update voice selection UI to be provider-aware
- Add proper error handling for missing Mistral API key
- Maintain backward compatibility with existing Gleez TTS
Co-authored-by: jahruz67 <jahruz67@users.noreply.github.com>
