Use GeoSN aerial imagery via own proxy instead of Esri for satellite mode
Esri World Imagery (Maxar) is not freely licensed for commercial
projects. Satellite mode now uses the official GeoSN orthophotos
(Saxony, 20 cm) through the cache proxy on maps.mummert.media, so
visitors never connect to Esri or geodienste.sachsen.de.
- raster layer below the first base symbol layer, labels and event
markers stay on top; Esri road/label overlays removed
- labels recoloured for the aerial view (white text, dark halo),
POIs, address labels and oneway arrows hidden; originals restored
when switching back
- attribution "© GeoSN, dl-de/by-2-0"
- bump map-module.js cache buster
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>