- Remove KVO on player.timeControlStatus (fires from CoreMedia bg threads)
- Stop accessing item.duration in timer callback (triggers FigNotificationCenter weak listener ops)
- Check player.rate in timer callback instead for isPlaying state
- Remove replaceCurrentItem(nil) from cleanup to prevent CoreMedia state inconsistency
- Use cachedDuration exclusively in time display updates
- Fix actor isolation warning in endObserver callback
yumoqing
c336066198