- Replace AudioWorkletNode with Tone.UserMedia for microphone capture
- Use Tone.Analyser for waveform analysis and Tone.Meter for level detection
- Implement proper stereo audio capture with real-time PCM transmission
- Use Tone.context for audio playback with proper buffer handling
- Add Tone.js CDN to HTML template
- Convert dashboard.js to ES module for Tone.js import
- Improve audio quality and reliability with battle-tested library
- Add broadcastOpusToWeb to PcmBroadcaster interface for raw Opus packets
- Server broadcasts Opus frames with mode byte (1) + user hash + packet data
- Browser detects packet mode: mode=1 for Opus, mode=0 for legacy PCM
- Implement WebCodecs AudioDecoder for Opus decoding in browser
- Keep existing PCM playback as fallback for compatibility
- Show error if WebCodecs unsupported
- Fixes listen feature under Bun where native Opus decode unavailable
