Same fix as Android (4af7c5f): writer never touches read_pos,
reader self-corrects when lapped. Power-of-2 capacity (16384),
bitmask indexing, overflow/underrun counters.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Replace Mutex-based CPAL callbacks with atomic SPSC ring buffers
- Proper async send/recv loops (no block_on), 20ms playout tick
- Add signal task for RoomUpdate presence display
- Add --alias, --raw-room flags and key persistence (~/.wzp/identity)
- Add SetAlias signal variant and relay-side handling
- Graceful Ctrl+C shutdown with force-quit on second press
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
