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Author SHA1 Message Date
4020d5ae0a Add hillshade and traffic overlay layers with layer control UI
- New LayerControl component with popover toggles for hillshade/traffic
- MapView: add/remove hillshade raster-dem and traffic raster layers
- Overlay layers persist in localStorage, survive theme swaps
- Hillshade defaults ON, traffic defaults OFF when available

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-21 00:52:20 +00:00