fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

backend/test_phase8_task1.py

@@ -17,7 +17,6 @@ from tenant_manager import get_tenant_manager
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
-
 def test_tenant_management():
     """测试租户管理功能"""
     print("=" * 60)
@@ -65,7 +64,6 @@ def test_tenant_management():
 
     return tenant.id
 
-
 def test_domain_management(tenant_id: str):
     """测试域名管理功能"""
     print("\n" + "=" * 60)
@@ -111,7 +109,6 @@ def test_domain_management(tenant_id: str):
 
     return domain.id
 
-
 def test_branding_management(tenant_id: str):
     """测试品牌白标功能"""
     print("\n" + "=" * 60)
@@ -151,7 +148,6 @@ def test_branding_management(tenant_id: str):
 
     return branding.id
 
-
 def test_member_management(tenant_id: str):
     """测试成员管理功能"""
     print("\n" + "=" * 60)
@@ -206,7 +202,6 @@ def test_member_management(tenant_id: str):
 
     return member1.id, member2.id
 
-
 def test_usage_tracking(tenant_id: str):
     """测试资源使用统计功能"""
     print("\n" + "=" * 60)
@@ -248,7 +243,6 @@ def test_usage_tracking(tenant_id: str):
 
     return stats
 
-
 def cleanup(tenant_id: str, domain_id: str, member_ids: list):
     """清理测试数据"""
     print("\n" + "=" * 60)
@@ -272,7 +266,6 @@ def cleanup(tenant_id: str, domain_id: str, member_ids: list):
     manager.delete_tenant(tenant_id)
     print(f"✅ 租户已删除: {tenant_id}")
 
-
 def main():
     """主测试函数"""
     print("\n" + "=" * 60)
@@ -310,6 +303,5 @@ def main():
             except Exception as e:
                 print(f"⚠️ 清理失败: {e}")
 
-
 if __name__ == "__main__":
     main()