android: voice messages recording + playback, file attachments
- C99 port of AudioCompressor (libutun_lite/audio_compressor.h/c)
- Voice recorder: PCM buffer + compressor + Opus encode + block splitting + uasync send
- Attachment sender: file splitting into blocks + uasync send
- Bridge API + JNI: voice start/feed/stop/cancel, attachment send, Opus decode for playback
- Kotlin: AudioRecorderManager (AudioRecord + JNI feed), AudioPlayer (AudioTrack + JNI decode)
- UI: PTT button with press-to-talk, attach button with file picker, recording overlay
- Message display: voice messages (play button), file attachments (icon + name)
- Settings: Opus preset selector (Low/Standard/High), compressor toggle
- AndroidManifest: RECORD_AUDIO, storage permissions
evgeny
5b6979da27