fix: move setLoading to effect to satisfy react-hooks lint rule

src/admin/analytics/useAnalytics.js

@@ -14,7 +14,6 @@ export function useAnalytics(dateFrom, dateTo) {
   const [error, setError] = useState(null);
 
   const fetchAnalytics = useCallback(async () => {
-    setLoading(true);
     setError(null);
 
     const { data: orders, error: ordersError } = await supabase
@@ -104,7 +103,10 @@ export function useAnalytics(dateFrom, dateTo) {
     setLoading(false);
   }, [dateFrom, dateTo]);
 
-  useEffect(() => { fetchAnalytics(); }, [fetchAnalytics]);
+  useEffect(() => {
+    setLoading(true);
+    fetchAnalytics();
+  }, [fetchAnalytics]);
 
   return { ...analytics, loading, error };
 }