feat: complete Phase 10 - add phase correlation, LUFS, and audio statistics
Implemented remaining Phase 10 analysis tools:
**Phase Correlation Meter (10.3)**
- Real-time stereo phase correlation display
- Pearson correlation coefficient calculation
- Color-coded indicator (-1 to +1 scale)
- Visual feedback: Mono-like, Good Stereo, Wide Stereo, Phase Issues
**LUFS Loudness Meter (10.3)**
- Momentary, Short-term, and Integrated LUFS measurements
- Simplified K-weighting approximation
- Vertical bar display with -70 to 0 LUFS range
- -23 LUFS broadcast standard reference line
- Real-time history tracking (10 seconds)
**Audio Statistics (10.4)**
- Project info: track count, duration, sample rate, channels, bit depth
- Level analysis: peak, RMS, dynamic range, headroom
- Real-time buffer analysis from all tracks
- Color-coded warnings for clipping and low headroom
**Integration**
- Added 5-button toggle in master column (FFT, SPEC, PHS, LUFS, INFO)
- All analyzers share consistent 192px width layout
- Theme-aware styling for light/dark modes
- Compact button labels for space efficiency
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
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