fix: resolve leaflet marker images through webpack

public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/osm_controller.js

@@ -1,5 +1,16 @@
 import { Controller } from '@hotwired/stimulus'
 import L from 'leaflet'
+import iconUrl from 'leaflet/dist/images/marker-icon.png'
+import iconRetinaUrl from 'leaflet/dist/images/marker-icon-2x.png'
+import shadowUrl from 'leaflet/dist/images/marker-shadow.png'
+
+// Icon.Default finds its images by reading the url() off .leaflet-default-icon-path and
+// stripping a literal `marker-icon.png` off the end - which a content-hashed filename never
+// matches, and the `link[href$="leaflet.css"]` fallback does not exist either because the
+// CSS is inlined into the bundle. Dropping the _getIconUrl override falls back to plain
+// option lookup, so the URLs Webpack emitted are used as they are.
+delete L.Icon.Default.prototype._getIconUrl
+L.Icon.Default.mergeOptions({ iconUrl, iconRetinaUrl, shadowUrl })
 
 export default class extends Controller {