Mikkeli Matlock
ad077d1f32
feat(01-02): extract OverlaySpeedometer to screens/overlay_screen.dart
- Created lib/screens/overlay_screen.dart with OverlaySpeedometer and _OverlaySpeedometerState
- All state, methods, gesture handling preserved exactly
- main.dart imports screens/overlay_screen.dart
- OverlaySpeedometer removed from main.dart
- main.dart slimmed to 39 lines (under 60 line target)
- main.dart now contains only: main(), overlayMain(), SpeedoApp class
- Zero analyzer errors (except intentional SCREAMING_SNAKE warnings)