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/routers/incidents.py

@@ -271,6 +271,55 @@ async def get_factchecks(
     return [dict(row) for row in rows]
 
 
+@router.get("/{incident_id}/locations")
+async def get_locations(
+    incident_id: int,
+    current_user: dict = Depends(get_current_user),
+    db: aiosqlite.Connection = Depends(db_dependency),
+):
+    """Geografische Orte einer Lage abrufen (aggregiert nach Ort)."""
+    tenant_id = current_user.get("tenant_id")
+    await _check_incident_access(db, incident_id, current_user["id"], tenant_id)
+    cursor = await db.execute(
+        """SELECT al.location_name, al.location_name_normalized, al.country_code,
+                  al.latitude, al.longitude, al.confidence,
+                  a.id as article_id, a.headline, a.headline_de, a.source, a.source_url
+           FROM article_locations al
+           JOIN articles a ON a.id = al.article_id
+           WHERE al.incident_id = ?
+           ORDER BY al.location_name_normalized, a.collected_at DESC""",
+        (incident_id,),
+    )
+    rows = await cursor.fetchall()
+
+    # Aggregierung nach normalisiertem Ortsnamen + Koordinaten
+    loc_map = {}
+    for row in rows:
+        row = dict(row)
+        key = (row["location_name_normalized"] or row["location_name"], round(row["latitude"], 2), round(row["longitude"], 2))
+        if key not in loc_map:
+            loc_map[key] = {
+                "location_name": row["location_name_normalized"] or row["location_name"],
+                "lat": row["latitude"],
+                "lon": row["longitude"],
+                "country_code": row["country_code"],
+                "confidence": row["confidence"],
+                "article_count": 0,
+                "articles": [],
+            }
+        loc_map[key]["article_count"] += 1
+        # Maximal 10 Artikel pro Ort mitliefern
+        if len(loc_map[key]["articles"]) < 10:
+            loc_map[key]["articles"].append({
+                "id": row["article_id"],
+                "headline": row["headline_de"] or row["headline"],
+                "source": row["source"],
+                "source_url": row["source_url"],
+            })
+
+    return list(loc_map.values())
+
+
 @router.get("/{incident_id}/refresh-log")
 async def get_refresh_log(
     incident_id: int,