feat: 完成代码

lib/app/model/entity_from_json_util.dart

@@ -1,4 +1,5 @@
 import 'package:kaer_with_panels/app/model/response/kr_is_register.dart';
+import 'package:kaer_with_panels/app/model/response/kr_check_subscription.dart';
 import 'package:kaer_with_panels/app/model/response/kr_login_data.dart';
 import 'package:kaer_with_panels/app/model/response/kr_node_list.dart';
 import 'package:kaer_with_panels/app/model/response/kr_package_list.dart';
@@ -23,6 +24,8 @@ abstract class EntityFromJsonUtil {
     switch (T.toString()) {
       case "KRIsRegister":
         return KRIsRegister.fromJson(json) as T;
+      case "KRCheckSubscription":
+        return KRCheckSubscription.fromJson(json) as T;
       case "KRLoginData":
         return KRLoginData.fromJson(json) as T;
       case "KRPackageList":

lib/app/model/response/kr_check_subscription.dart

@@ -0,0 +1,30 @@
+/// 是否订阅（区分设备和邮箱）
+class KRCheckSubscription {
+  /// 当前设备订阅状态
+  final bool deviceSubscribed;
+
+  /// 邮箱订阅状态
+  final bool emailSubscribed;
+
+  /// 构造函数，默认 false
+  KRCheckSubscription({
+    this.deviceSubscribed = false,
+    this.emailSubscribed = false,
+  });
+
+  /// 从 JSON 创建对象
+  KRCheckSubscription.fromJson(Map<String, dynamic>? json)
+      : deviceSubscribed = (json?['device_status'] == true || json?['deviceStatus'] == "true") ? true : false,
+        emailSubscribed = (json?['email_status'] == true || json?['emailStatus'] == "true") ? true : false;
+
+  /// 转换成 JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'deviceStatus': deviceSubscribed,
+      'emailStatus': emailSubscribed,
+    };
+  }
+
+  /// 判断邮箱和设备是否都已订阅
+  bool get isFullySubscribed => deviceSubscribed && emailSubscribed;
+}