Sprint 15: Zeitzone-Fix, Gewichts-Sync, Öffnungszeiten, KI-Bericht, POI-Moderation — SW by-v432, APP_VER 411

- client_time: Browser-Lokalzeit bei allen Creates mitschicken (Tagebuch, Notizen,
  Forum, Verlorener Hund, Routen) — kein UTC-Versatz mehr bei Einträgen
- Gewicht-Sync: health typ=gewicht schreibt dogs.gewicht_kg, einmalige Migration
- Praxen: opening_hours + lat/lon/osm_id in tieraerzte-Tabelle, OSM-Nearby-Lookup,
  Öffnungszeiten in Karte und Detailansicht
- KI-Gesundheitsbericht: alle 2 Wochen automatisch, ki_health_reports-Tabelle,
  Frontend-Banner mit Archiv (letzten 5 Berichte)
- POI-Korrekturen: User schlägt Öffnungszeiten-Änderung vor, Moderatoren-Tab
  genehmigt/lehnt ab, user_edited-Flag schützt vor Overpass-Überschreibung
- timeutils.py: safe_client_time() zentral für alle Routen

backend/routes/moderation.py

@@ -45,11 +45,20 @@ async def mod_stats(user=Depends(require_moderator)):
         except Exception:
             pass
 
+        pending_poi_edits = 0
+        try:
+            pending_poi_edits = conn.execute(
+                "SELECT COUNT(*) FROM osm_poi_edits WHERE status='pending'"
+            ).fetchone()[0]
+        except Exception:
+            pass
+
     return {
-        "open_reports":    open_reports,
-        "pending_fotos":   pending_fotos,
-        "banned_users":    banned_users,
-        "pending_zuchter": pending_zuchter,
+        "open_reports":     open_reports,
+        "pending_fotos":    pending_fotos,
+        "banned_users":     banned_users,
+        "pending_zuchter":  pending_zuchter,
+        "pending_poi_edits": pending_poi_edits,
     }
 
 
@@ -207,3 +216,56 @@ async def mod_foto_action(foto_id: int, data: dict, user=Depends(require_moderat
         reject_reason=data.get("reject_reason", ""),
     )
     return await review_submission(foto_id, model, user)
+
+
+# ------------------------------------------------------------------
+# GET /api/moderation/poi-edits — ausstehende POI-Korrekturen
+# ------------------------------------------------------------------
+@router.get("/poi-edits")
+async def mod_poi_edits(user=Depends(require_moderator)):
+    with db() as conn:
+        rows = conn.execute("""
+            SELECT e.id, e.osm_id, e.poi_name, e.field,
+                   e.old_value, e.new_value, e.status,
+                   e.created_at, e.resolved_at,
+                   u.name AS einreicher_name
+            FROM osm_poi_edits e
+            JOIN users u ON u.id = e.user_id
+            ORDER BY e.status ASC, e.created_at DESC
+            LIMIT 100
+        """).fetchall()
+    return [dict(r) for r in rows]
+
+
+# ------------------------------------------------------------------
+# PATCH /api/moderation/poi-edits/{id} — approve / reject
+# ------------------------------------------------------------------
+@router.patch("/poi-edits/{edit_id}")
+async def mod_poi_edit_action(edit_id: int, data: dict,
+                               user=Depends(require_moderator)):
+    action = data.get("action")
+    if action not in ("approve", "reject"):
+        raise HTTPException(400, "action muss 'approve' oder 'reject' sein.")
+
+    with db() as conn:
+        edit = conn.execute(
+            "SELECT * FROM osm_poi_edits WHERE id=?", (edit_id,)
+        ).fetchone()
+        if not edit:
+            raise HTTPException(404, "Korrektur nicht gefunden.")
+        if edit["status"] != "pending":
+            raise HTTPException(409, "Korrektur wurde bereits bearbeitet.")
+
+        if action == "approve":
+            conn.execute(
+                f"UPDATE osm_pois SET {edit['field']}=?, user_edited=1 WHERE osm_id=?",
+                (edit["new_value"], edit["osm_id"])
+            )
+
+        conn.execute(
+            """UPDATE osm_poi_edits SET status=?, mod_id=?, resolved_at=datetime('now')
+               WHERE id=?""",
+            (action + "d", user["id"], edit_id)
+        )
+
+    return {"status": action + "d"}