New Features:
- Added pinned tab numbering with round brackets (1)-(9)
- Separate visual style for pinned vs unpinned tabs
- Simplified keyboard shortcuts: Alt+1-9 for pinned tabs, Cmd+1-9 for unpinned tabs
- Improved dual navigation system for both tab types

Technical:
- Enhanced debouncing to prevent race conditions
- Better title tracking and update handling
- No data collection or external requests