解决账户中心的问题

core/backend/apps/billing/serializers.py

@@ -13,6 +13,9 @@ class CreditAccountSerializer(serializers.ModelSerializer):
 class CreditLedgerSerializer(serializers.ModelSerializer):
     # 成员展示名:优先真实姓名 → 用户名 → 邮箱;系统流水(无 user)留空
     user_label = serializers.SerializerMethodField()
+    # 扣费项目:与任务监控类型列同源,供账户中心流水展示
+    task_type = serializers.SerializerMethodField()
+    project_title = serializers.SerializerMethodField()
 
     class Meta:
         model = CreditLedger
@@ -21,7 +24,9 @@ class CreditLedgerSerializer(serializers.ModelSerializer):
             "user",
             "user_label",
             "project",
+            "project_title",
             "task",
+            "task_type",
             "ledger_type",
             "amount",
             "balance_after",
@@ -37,6 +42,16 @@ class CreditLedgerSerializer(serializers.ModelSerializer):
             return ""
         return user.first_name or user.username or user.email or ""
 
+    def get_task_type(self, obj):
+        task = getattr(obj, "task", None)
+        return getattr(task, "task_type", "") or ""
+
+    def get_project_title(self, obj):
+        project = getattr(obj, "project", None)
+        if project is None:
+            return ""
+        return getattr(project, "title", None) or getattr(project, "name", None) or ""
+
 
 class CreditReservationSerializer(serializers.ModelSerializer):
     class Meta: