_handlePlaybackError silently skipped a dead track (404 / decoder /
EOS / network drop) with only a debugPrint, hiding the signal that
tells a broken track from a flaky app.
- audio_handler: _playbackErrors broadcast stream; emit the failing
track title (mediaItem.value?.title — correctly mapped post-#49)
before the skip/pause
- playback_error_reporter (new): global scaffoldMessengerKey +
reporter that buffers, 2s-debounces, and coalesces bursts into one
SnackBar ("Couldn't play X — skipping" / "Skipped N unplayable
tracks")
- app.dart: scaffoldMessengerKey on MaterialApp.router + postFrame read
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
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