feat: Add admin endpoints for manual zone sync trigger

backend/app/api/admin.py

@@ -1726,3 +1726,59 @@ async def force_activate_listing(
         "slug": listing.slug,
         "public_url": listing.public_url,
     }
+
+
+# ============== Zone File Sync ==============
+
+@router.post("/zone-sync/switch")
+async def trigger_switch_sync(
+    background_tasks: BackgroundTasks,
+    db: Database,
+    admin: User = Depends(require_admin),
+):
+    """
+    Trigger manual Switch.ch zone file sync (.ch, .li).
+    Admin only.
+    """
+    from app.services.zone_file import ZoneFileService
+    
+    async def run_sync():
+        zf = ZoneFileService()
+        from app.database import async_session_maker
+        async with async_session_maker() as session:
+            result = await zf.sync_all_zones(session)
+            return result
+    
+    background_tasks.add_task(run_sync)
+    
+    return {
+        "status": "started",
+        "message": "Switch.ch zone sync started in background. Check logs for progress.",
+    }
+
+
+@router.post("/zone-sync/czds")
+async def trigger_czds_sync(
+    background_tasks: BackgroundTasks,
+    db: Database,
+    admin: User = Depends(require_admin),
+):
+    """
+    Trigger manual ICANN CZDS zone file sync (gTLDs).
+    Admin only.
+    """
+    from app.services.czds_client import CZDSClient
+    
+    async def run_sync():
+        client = CZDSClient()
+        from app.database import async_session_maker
+        async with async_session_maker() as session:
+            result = await client.sync_all_zones(session)
+            return result
+    
+    background_tasks.add_task(run_sync)
+    
+    return {
+        "status": "started",
+        "message": "ICANN CZDS zone sync started in background. Check logs for progress.",
+    }