perbaikan on possale string 1

lib/Screens/payment getway/payment_getway_screen.dart

@@ -25,11 +25,15 @@ const String failureUrl = 'order-status?status=failed';
 class PaymentScreenState extends State<PaymentScreen> {
   late WebViewController controller;
   final ImagePicker _imagePicker = ImagePicker();
+  late bool isSupportedPlatform;
 
   @override
   void initState() {
-    // TODO: implement initState
     super.initState();
+    isSupportedPlatform = Platform.isAndroid || Platform.isIOS;
+    
+    if (!isSupportedPlatform) return;
+
     paymentUrl = paymentUrl.replaceAll(APIConfig.domain, APIConfig.domain).replaceAll('plan_id', widget.planId).replaceAll('business_id', widget.businessId);
 
     controller = WebViewController()
@@ -72,6 +76,24 @@ class PaymentScreenState extends State<PaymentScreen> {
 
   @override
   Widget build(BuildContext context) {
+    if (!isSupportedPlatform) {
+      return Scaffold(
+        appBar: AppBar(
+          title: Text(lang.S.of(context).paymentGateway),
+        ),
+        body: Center(
+          child: Padding(
+            padding: const EdgeInsets.all(20.0),
+            child: Text(
+              'Payment Gateway is not supported on this device. Please use an Android or iOS device to complete the subscription.',
+              textAlign: TextAlign.center,
+              style: TextStyle(fontSize: 18),
+            ),
+          ),
+        ),
+      );
+    }
+
     return Scaffold(
       appBar: AppBar(
         title: Text(