Fixed issue where currentTime wasn't updating during playback: - Removed 'isPlaying' from updatePlaybackPosition dependencies - This was causing the RAF loop to stop when state changed - Now animation frame continues running throughout playback - Playhead now updates smoothly in waveform and timeline slider 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>