v1.4.3

Premium layout and settings polish.\n\n- Prioritizes the map during mobile track playback with compact header chrome, a smaller restore handle, and a tighter animation dock.\n- Refines Settings with helper copy, localized labels, better mobile placement, and clearer local-save trust copy.\n- Normalizes component geometry away from pill shapes and adds regression coverage for layout, settings, and rounded-control drift.\n- Improves search empty states, storm loading/missing-data copy, service-worker update copy, version metadata, and README screenshots.