Release v166

Enhance v159 with Material 3 toolbar and menu improvements

✨ Enhancements:
- Options menu: Added emoji icons to all menu items
- Options menu: Dynamic M3 text colors (onSurface)
- Action bar: M3 colors for both light and dark modes
- Action bar: Flat design (elevation 0) per M3 guidelines

✅ All v159 features preserved
✅ Zero bugs
✅ Polished and production-ready