Added comprehensive master output level monitoring:
- Created MasterMeter component with dual vertical bars (peak + RMS)
- Implemented real-time level monitoring in useMultiTrackPlayer hook
- Added master analyser node connected to audio output
- Displays color-coded levels (green/yellow/red) based on dB thresholds
- Shows numerical dB readouts for both peak and RMS
- Includes clickable clip indicator with reset functionality
- Integrated into PlaybackControls next to master volume
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Co-Authored-By: Claude <noreply@anthropic.com>
