- Remove obsolete track_map use case from types, views, and router
- Delete TrackMapView.vue (superseded by persistent TrackDetailView)
- Auto-analyze in handleBuildTrack before building track model
- Add CharacteristicsView: expandable car cards with aggregated shift-point
profiles (gear RPM/speed ranges, recommended shift RPM)
- Add TracksView + TrackDetailView + tracks Pinia store (Canvas 2D geometry)
- Add characteristics API client functions (listCarProfiles)
- Add tracks and characteristics nav items and routes
- Update Game type values to match backend snake_case (project_cars_1/2)
- Update use_case types and labels (remove track_map, keep track_mapping)
