新增支付流程，新增支付页面等待倒计时，自动检查订单状态等

lib/app/services/api_service/api.dart

@@ -38,10 +38,10 @@ abstract class Api {
   static const String kr_getPaymentMethods = "/v1/app/payment/methods";
 
   /// 进行下单
-  static const String kr_purchase = "/v1/app/order/purchase";
+  static const String kr_purchase = "/v1/public/order/purchase";
 
-  /// 获取支付地址,跳转到付款地址
-  static const String kr_checkout = "/v1/app/order/checkout";
+  /// 获取支付地址,跳转到付款地址（参考 Tauri 项目）
+  static const String kr_checkout = "/v1/public/portal/order/checkout";
 
   /// 获取可购买套餐
   static const String kr_getPackageList = "/v1/public/subscribe/list";
@@ -61,6 +61,9 @@ abstract class Api {
   /// 通过该接口判断订单状态
   static const String kr_orderDetail = "/v1/app/order/detail";
 
+  /// 查询订单状态（公开接口，参考 Tauri 项目）
+  static const String kr_queryOrderStatus = "/v1/public/order/detail";
+
   /// 获取消息列表
   static const String kr_getMessageList = "/v1/public/announcement/list";
 

lib/app/services/api_service/kr_subscribe_api.dart

@@ -120,6 +120,27 @@ class KRSubscribeApi {
     return right(baseResponse.model);
   }
 
+  /// 查询订单状态（公开接口，用于支付轮询）
+  Future<Either<HttpError, KROrderStatus>> kr_queryOrderStatus(
+      String orderNo) async {
+    final Map<String, dynamic> data = <String, dynamic>{};
+    data['order_no'] = orderNo;
+
+    BaseResponse<KROrderStatus> baseResponse =
+        await HttpUtil.getInstance().request<KROrderStatus>(
+      Api.kr_queryOrderStatus,
+      data,
+      method: HttpMethod.GET,
+      isShowLoading: false,
+    );
+    if (!baseResponse.isSuccess) {
+      return left(
+          HttpError(msg: baseResponse.retMsg, code: baseResponse.retCode));
+    }
+
+    return right(baseResponse.model);
+  }
+
   /// 获取支付方式
   Future<Either<HttpError, List<KRPaymentMethod>>>
       kr_getPaymentMethods() async {
@@ -231,14 +252,14 @@ class KRSubscribeApi {
     return right(baseResponse.model.orderNo);
   }
 
-  /// 获取支付地址,跳转到付款地址
-  Future<Either<HttpError, String>> kr_checkout(String orderId) async {
+  /// 获取支付地址,跳转到付款地址（新版本：支持多种支付类型）
+  Future<Either<HttpError, KRCheckoutResponse>> kr_checkout(String orderId) async {
     final Map<String, dynamic> data = <String, dynamic>{};
     data['orderNo'] = orderId;
     data['returnUrl'] = AppConfig.getInstance().baseUrl;
 
-    BaseResponse<KRPurchaseOrderUrl> baseResponse =
-        await HttpUtil.getInstance().request<KRPurchaseOrderUrl>(
+    BaseResponse<KRCheckoutResponse> baseResponse =
+        await HttpUtil.getInstance().request<KRCheckoutResponse>(
       Api.kr_checkout,
       data,
       method: HttpMethod.POST,
@@ -249,7 +270,7 @@ class KRSubscribeApi {
           HttpError(msg: baseResponse.retMsg, code: baseResponse.retCode));
     }
 
-    return right(baseResponse.model.url);
+    return right(baseResponse.model);
   }
 
   /// 重置订阅周期