a12ea90cdf
State machine fixes: 1. Raw IQ replay EOF now calls _stop_radar() to fully restore UI 2. Worker thread finished signal triggers UI recovery on crash/exit 3. _stop_radar() stops demo simulator to prevent cross-mode interference 4. _stop_demo() correctly identifies Mock mode via combo text 5. Demo start no longer clobbers status bar when acquisition is running 6. _stop_radar() resets playback button text, frame counter, file label 7. _start_raw_iq_replay() error path cleans up stale controller/worker 8. _refresh_gui() preserves Raw IQ paused status instead of overwriting Map/location: - RawIQReplayWorker now receives _radar_position (GPSData ref) so targets get real lat/lon projected from the virtual radar position - Added heading control to Map tab sidebar (0-360 deg, wrapping) - Manual lat/lon/heading changes in Map tab apply to replay targets Ruff clean, 120/120 tests pass.