tdd 진행

mobile/lib/models/subscription_model.dart

@@ -158,6 +158,45 @@ class SubscriptionPlan {
     required this.hasPriority,
   });
 
+  /// JSON에서 구독 플랜 객체 생성
+  factory SubscriptionPlan.fromJson(Map<String, dynamic> json) {
+    return SubscriptionPlan(
+      type: SubscriptionPlanType.values.firstWhere(
+        (e) => e.toString().split('.').last == json['type'],
+        orElse: () => SubscriptionPlanType.free,
+      ),
+      name: json['name'],
+      description: json['description'],
+      monthlyPrice: json['monthlyPrice'].toDouble(),
+      yearlyPrice: json['yearlyPrice'].toDouble(),
+      currency: json['currency'],
+      features: List<String>.from(json['features']),
+      maxMembers: json['maxMembers'],
+      maxEvents: json['maxEvents'],
+      hasAdvancedStats: json['hasAdvancedStats'] ?? false,
+      hasCustomization: json['hasCustomization'] ?? false,
+      hasPriority: json['hasPriority'] ?? false,
+    );
+  }
+
+  /// 구독 플랜 객체를 JSON으로 변환
+  Map<String, dynamic> toJson() {
+    return {
+      'type': type.toString().split('.').last,
+      'name': name,
+      'description': description,
+      'monthlyPrice': monthlyPrice,
+      'yearlyPrice': yearlyPrice,
+      'currency': currency,
+      'features': features,
+      'maxMembers': maxMembers,
+      'maxEvents': maxEvents,
+      'hasAdvancedStats': hasAdvancedStats,
+      'hasCustomization': hasCustomization,
+      'hasPriority': hasPriority,
+    };
+  }
+
   /// 기본 구독 플랜 목록 반환
   static List<SubscriptionPlan> getDefaultPlans() {
     return [