yumoqing f14d47b5c8 fix: use sublayer instead of replacing NSView backing layer to prevent autorelease crash
- PlayerNSView: AVPlayerLayer as sublayer (not layer= replacement)
  NSView internally manages a sublayer array; replacing the backing
  layer directly causes dangling refs during autorelease pool drain
- cleanup(): only pause + remove observers, no replaceCurrentItem
  CoreMedia internal state gets corrupted when item is replaced
  during view teardown; let it release naturally with deinit
2026-06-22 00:47:05 +08:00
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