adding

apps/billing/api/serializers.py

@@ -33,13 +33,21 @@ class FeaturePlanSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = FeaturePlan
-        fields = ["key", "name", "tiers", "is_active", "expires_at"]
+        fields = ["key", "name", "tiers", "is_active", "is_free", "expires_at"]
 
     def get_is_active(self, obj: FeaturePlan) -> bool:
-        return FeatureAccessService.is_active(self.context["request"].user, obj.key)
+        # مهمان (بدون حساب): فقط ابزارهای رایگان باز است — بدونِ این شاخه،
+        # AnonymousUser به is_active می‌رسید و خطا می‌داد.
+        user = self.context["request"].user
+        if not user.is_authenticated:
+            return obj.is_free
+        return FeatureAccessService.is_active(user, obj.key)
 
     def get_expires_at(self, obj: FeaturePlan):
-        return FeatureAccessService.expires_at(self.context["request"].user, obj.key)
+        user = self.context["request"].user
+        if not user.is_authenticated:
+            return None
+        return FeatureAccessService.expires_at(user, obj.key)
 
 
 class GemPackSerializer(serializers.ModelSerializer):