同步更新：重构路由、服务模块，更新前端构建

services/time_utils.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+from __future__ import annotations
+
+from datetime import datetime
+
+import pytz
+
+BEIJING_TZ = pytz.timezone("Asia/Shanghai")
+
+
+def get_beijing_now() -> datetime:
+    return datetime.now(BEIJING_TZ)
+