update gen qr

lib/features/cart/presentation/widgets/checkout_submit_button.dart

@@ -126,11 +126,6 @@ class CheckoutSubmitButton extends HookConsumerWidget {
         notes: notes,
       ).future);
 
-      // Close loading dialog
-      if (context.mounted) {
-        Navigator.of(context).pop();
-      }
-
       // Extract order number from response
       final orderNumber = result['orderNumber'] as String? ??
                           result['orderId'] as String? ??
@@ -139,6 +134,7 @@ class CheckoutSubmitButton extends HookConsumerWidget {
       if (needsNegotiation) {
         // Navigate to order success page with negotiation flag
         if (context.mounted) {
+          Navigator.of(context).pop();
           context.pushReplacementNamed(
             RouteNames.orderSuccess,
             queryParameters: {
@@ -149,7 +145,12 @@ class CheckoutSubmitButton extends HookConsumerWidget {
           );
         }
       } else {
-        // Navigate to payment QR page
+        // Close loading dialog
+        if (context.mounted) {
+          Navigator.of(context).pop();
+        }
+
+        // Navigate to payment QR page (it will fetch QR code data itself)
         if (context.mounted) {
           context.pushReplacementNamed(
             RouteNames.paymentQr,