Implement threading, logging, and CJK font support
Major improvements to GUI stability and internationalization:
- Fix GUI freezing by implementing threaded audio analysis
- Add AudioAnalysisWorker thread for background processing
- Progress signals with percentage updates
- Thread-safe communication via Qt signals
- Add comprehensive CLI logging system
- 5 log levels: ERROR, WARN, INFO, DEBUG, TRACE
- Command line control: --log-level, --log-file
- Real-time feedback during analysis operations
- Implement CJK font fallback system
- FontManager with 3-tier fallback (custom → system → default)
- Cross-platform CJK font detection (Windows/macOS/Linux)
- Licensing-safe fonts/ directory with gitignored font files
- Setup utility and comprehensive documentation
- Fix numpy array formatting issue with BPM detection
- Add progress indicators for long-running operations
- Preserve fonts directory structure with placeholder file
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
Mikkeli Matlock
4337a31b80