feat(windkarte): geometry eingebettet in wind_area CMS-Einträge

GeoJSON-Geometrie direkt in CMS-Einträgen gespeichert — kein separates
GeoJSON-File mehr. WindkarteMap baut FeatureCollection aus areas[].geometry.
WindArea-Typ bekommt geometry-Feld. geojsonUrl-Prop entfernt.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/components/blocks/WindkarteBlock.svelte

@@ -15,9 +15,7 @@
     env.PUBLIC_CMS_URL || "http://localhost:3000"
   ).replace(/\/$/, "");
 
-  const GEOJSON_URL = `${CMS_BASE}/api/assets/geodaten/windvorranggebiete_swt_2012.geojson`;
-
-  let areas = $state<WindArea[]>([]);
+let areas = $state<WindArea[]>([]);
   let selectedArea = $state<WindArea | null>(null);
   let selectedCenter = $state<[number, number] | null>(null);
   let mapReady = $state(false);
@@ -106,7 +104,6 @@
       {#await MapComponent then Map}
         <Map
           {areas}
-          geojsonUrl={GEOJSON_URL}
           {initialGebietsNr}
           onselect={handleSelect}
           onready={(ctrl) => { resetMap = ctrl.reset; }}