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- TrackRepository + TrackPoint wired into MainViewModel:
isRecording/trackPoints StateFlows, startTrack/stopTrack/addGpsPoint
- MapHandler.updateTrackLayer(): lazily initialises a red LineLayer
and updates GeoJSON polyline from List<TrackPoint>
- fab_record_track FAB in activity_main.xml (top|end of bottom nav);
icon toggles between ic_track_record and ic_close while recording
- MainActivity feeds every GPS fix into viewModel.addGpsPoint() and
observes trackPoints to redraw the polyline in real time
- ic_track_record.xml vector drawable (red record dot)
- 8 TrackRepositoryTest tests all GREEN
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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