Update SubmissionsPage to include polling interval for API requests, enhancing data retrieval efficiency.

src/pages/submissions/SubmissionsPage.tsx

@@ -70,7 +70,10 @@ export const SubmissionsPage: React.FC = () => {
       userId: selectedUserId || undefined,
       status: statusFilter !== 'all' ? statusFilter : undefined,
     },
-    { skip: !chainId || !useNewApi }
+    {
+      skip: !chainId || !useNewApi,
+      pollingInterval: 1200,
+    }
   )
 
   // Старый API: получаем общую статистику и submissions отдельно