c9c0882724
- Switched from `miniaudio` to `maudio` Rust crate and added `AudioCapture` and `AudioPlayback` native classes. - Removed browser-side audio infrastructure including Web Audio API, audio worklet processor, and WebRTC runtime. - Migrated STT recorder and transcriber modules to use native `AudioCapture` with callback-based streaming. - Replaced streaming audio player with native `AudioPlayback` that writes PCM directly without TypeScript intermediaries. - Removed ffmpeg, wav, and platform-specific playback commands from the audio toolchain.