don't try to fetch previews when motion search dialog is open

web/src/views/motion-search/MotionSearchView.tsx

@@ -131,12 +131,10 @@ export default function MotionSearchView({
   );
 
   // Camera previews – defer until dialog is closed
-  const allPreviews = useCameraPreviews(
-    isSearchDialogOpen ? { after: 0, before: 0 } : timeRange,
-    {
+  const allPreviews = useCameraPreviews(timeRange, {
     camera: selectedCamera ?? undefined,
-    },
-  );
+    fetchPreviews: !isSearchDialogOpen,
+  });
 
   // ROI state
   const [polygonPoints, setPolygonPoints] = useState<number[][]>([]);