fix: recover the Rust audio engine from a dead output stream

[noFAYZ]

Fixes #154.

• Cause: rodio's default stream error callback only logs. On ALSA, cpal re-polls after POLLERR with no recovery, so a dead device spun the boosted audio thread and froze playback.
• Fix: each stream gets its own error callback. Underruns are ignored; any other error is reported once. The engine drops the dead stream and emits an early native-audio-ended, so the existing premature-end path reloads the track at its position. The next load reopens the device.
• Paused: the lost track is reloaded on the next play instead of autoplaying.
• Device that keeps failing: a stream dying within 10s of opening makes loads return an error for 10s, instead of walking the queue.
• SetOutputDevice shares the same reopen path.
• Test: an underrun is never reported, and repeated POLLERR is reported once.

Linux PipeWire branch not compiled locally; not tested against a real ALSA failure.

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Project	Deployment	Actions	Updated
zuno	Ready	Preview	Oct 7, 2026 2:52pm UTC