feat: 增加ios支付&ui修改

lib/app/modules/kr_purchase_membership/controllers/kr_purchase_membership_controller.dart

@@ -842,17 +842,47 @@ class KRPurchaseMembershipController extends GetxController {
           print('  Stripe Client Secret: ${checkoutResponse.stripe?.clientSecret}');
           print('💳 显示 Stripe 支付表单...');
           print('═══════════════════════════════════════');
-          await Stripe.instance.initPaymentSheet(
-            paymentSheetParameters: SetupPaymentSheetParameters(
-              // ⚠️ Stripe SDK 必须在 main() 中初始化过 publishableKey
-              paymentIntentClientSecret: checkoutResponse.stripe?.clientSecret,
-              merchantDisplayName: 'Hi快VPN',
-              // 确保 customerId 和 ephemeralKeySecret 也被设置，如果需要保存卡片信息
+
+          final clientSecret = checkoutResponse.stripe?.clientSecret;
+          if (clientSecret == null || clientSecret.isEmpty) {
+            KRCommonUtil.kr_showToast('缺少支付凭证，请稍后重试');
+            return;
+          }
+
+          // 仅 iOS 使用 Apple Pay
+          if (!Platform.isIOS) {
+            KRCommonUtil.kr_showToast('Apple Pay 仅在 iOS 可用');
+            return;
+          }
+          print('Platform: ${Platform.operatingSystem} ${Platform.operatingSystemVersion}');
+          print('Merchant identifier: ${Stripe.merchantIdentifier}');
+          // 检查设备是否支持 Platform Pay（Apple Pay）
+          final supported = await Stripe.instance.isPlatformPaySupported();
+          if (!supported) {
+            KRCommonUtil.kr_showToast('当前设备或 Wallet 不支持 Apple Pay，请确认已添加可用卡');
+            return;
+          }
+          // 2. 创建确认支付的参数对象
+          final params = PlatformPayConfirmParams.applePay(
+            applePay: ApplePayParams(
+              merchantCountryCode: 'US',
+              currencyCode: 'USD',
+              cartItems: [
+                ApplePayCartSummaryItem.immediate(
+                  label: 'Hi快VPN 服务',
+                  amount: kr_getPlanPrice(
+                    kr_plans[kr_selectedPlanIndex.value],
+                  ).toStringAsFixed(2),
+                ),
+              ],
             ),
           );
 
-          // B. 显示支付表单给用户
-          await Stripe.instance.presentPaymentSheet();
+          // 🚀 3. 调用方法，直接启动 Apple Pay 原生界面
+          await Stripe.instance.confirmPlatformPayPaymentIntent(
+            clientSecret: clientSecret,
+            confirmParams: params,
+          );
 
           // C. 支付成功
           print('✅ Stripe 支付成功！');