Race condition fix:
- After SessionStartPlay, verify actual playback state
- Add 100ms delay to let native client update
- Check isSessionTrackPlaying() before setting state
- Prevents "double click" issue where component thinks it's playing but isn't
Loop diagnostics:
- Add [LOOP] logging to track loop changes
- Add [POLLING] logging when track reaches end
- Log whether loop is enabled and native client behavior
- Help diagnose why loop not repeating
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>