refactor(字段命名): 统一将created_at和updated_at重命名为created_time和updated_time

重构字段命名以保持一致性，将时间相关字段从created_at/updated_at统一改为created_time/updated_time
同时调整相关查询参数、服务层映射和模板文件中的字段命名
优化权限过滤逻辑，提取为独立的Permission类

backend/app/api/v1/module_example/demo/param.py

@@ -13,7 +13,7 @@ class DemoQueryParam:
         self,
         name: Optional[str] = Query(None, description="名称"),
         status: Optional[bool] = Query(None, description="是否启用"),
-        creator: Optional[int] = Query(None, description="创建人"),
+        created_id: Optional[int] = Query(None, description="创建人"),
         start_time: Optional[DateTimeStr] = Query(None, description="开始时间", example="2025-01-01 00:00:00"),
         end_time: Optional[DateTimeStr] = Query(None, description="结束时间", example="2025-12-31 23:59:59"),
     ) -> None:
@@ -22,11 +22,11 @@ class DemoQueryParam:
         self.name = ("like", name)
 
         # 精确查询字段
-        self.created_id = creator
+        self.created_id = created_id
         self.status = status
 
         # 时间范围查询
         if start_time and end_time:
-            self.created_at = ("between", (start_time, end_time))
+            self.created_time = ("between", (start_time, end_time))
 
 

backend/app/api/v1/module_example/demo/service.py

@@ -179,9 +179,9 @@ class DemoService:
             'name': '名称', 
             'status': '状态',
             'description': '备注',
-            'created_at': '创建时间',
-            'updated_at': '更新时间',
-            'creator': '创建者',
+            'created_time': '创建时间',
+            'updated_time': '更新时间',
+            'created_id': '创建者',
         }
 
         # 复制数据并转换状态
@@ -190,11 +190,11 @@ class DemoService:
             # 处理状态
             item['status'] = '正常' if item.get('status') else '停用'
             # 处理创建者
-            creator_info = item.get('creator')
+            creator_info = item.get('created_id')
             if isinstance(creator_info, dict):
-                item['creator'] = creator_info.get('name', '未知')
+                item['created_id'] = creator_info.get('name', '未知')
             else:
-                item['creator'] = '未知'
+                item['created_id'] = '未知'
 
         return ExcelUtil.export_list2excel(list_data=data, mapping_dict=mapping_dict)