improving polling logic

lib/screens/accounts/widgets/account_balance_widget.dart

@@ -242,7 +242,7 @@ class _AccountBalanceWidgetState extends State<AccountBalanceWidget>
                     ),
                     child: ClipOval(
                       child: Image.asset(
-                        flagAsset,
+                        'assets/$flagAsset',
                         fit: BoxFit.cover,
                         errorBuilder: (_, __, ___) => Icon(
                           Icons.monetization_on_outlined,

lib/screens/gateway/gateway_controller.dart

@@ -90,12 +90,6 @@ class GatewayController extends ChangeNotifier {
     while (!model.isCancelled && attempt < maxAttempts) {
       attempt++;
 
-      // Wait 10 seconds before each poll request
-      await Future.delayed(const Duration(seconds: 10));
-
-      // Check again after delay in case it was cancelled during the delay
-      if (model.isCancelled) break;
-
       ApiResponse<Map<String, dynamic>> result = await poll(uid);
 
       // Only stop on success or failure
@@ -105,8 +99,15 @@ class GatewayController extends ChangeNotifier {
         if (status == 'SUCCESS') {
           return result;
         }
+
+        await Future.delayed(const Duration(seconds: 10));
+        if (model.isCancelled) break;
+
         // Otherwise (e.g. PENDING), continue polling
       } else {
+        await Future.delayed(const Duration(seconds: 10));
+        if (model.isCancelled) break;
+
         // Network error — show failure UI and stop
         model.isCancelled = true;
         model.status = 'FAILED';