Kartenfeature: Geoparsing + Leaflet-Karte im Dashboard

- Neues Geoparsing-Modul (spaCy NER + geonamescache/Nominatim)
- article_locations-Tabelle mit Migration
- Pipeline-Integration nach Artikel-Speicherung
- API-Endpunkt GET /incidents/{id}/locations
- Leaflet.js + MarkerCluster im Dashboard-Grid
- Theme-aware Kartenkacheln (CartoDB dark / OSM light)
- Gold-Akzent MarkerCluster, Popup mit Artikelliste

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

src/static/js/layout.js

@@ -14,6 +14,7 @@ const LayoutManager = {
         { id: 'faktencheck', x: 6, y: 0, w: 6,  h: 4, minW: 4, minH: 4 },
         { id: 'quellen',     x: 0, y: 4, w: 12, h: 2, minW: 6, minH: 2 },
         { id: 'timeline',    x: 0, y: 5, w: 12, h: 4, minW: 6, minH: 4 },
+        { id: 'karte',       x: 0, y: 9, w: 12, h: 4, minW: 6, minH: 3 },
     ],
 
     TILE_MAP: {
@@ -21,6 +22,7 @@ const LayoutManager = {
         faktencheck: '.incident-analysis-factcheck',
         quellen:     '.source-overview-card',
         timeline:    '.timeline-card',
+        karte:       '.map-card',
     },
 
     init() {
@@ -44,7 +46,11 @@ const LayoutManager = {
             this._applyLayout(saved);
         }
 
-        this._grid.on('change', () => this._debouncedSave());
+        this._grid.on('change', () => {
+            this._debouncedSave();
+            // Leaflet-Map bei Resize invalidieren
+            if (typeof UI !== 'undefined') UI.invalidateMap();
+        });
 
         const toolbar = document.getElementById('layout-toolbar');
         if (toolbar) toolbar.style.display = 'flex';