feat(web): 新增系统管理功能并优化界面样式

- 更新路由配置，调整页面结构
- 优化主题样式，自定义 ant-design 样式
- 新增全局样式，包括滚动条、按钮、模态框等

web/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "serve": "vue-cli-service serve && webpack-dev-server",
+    "serve": "vue-cli-service serve ",
     "build": "vue-cli-service build",
     "lint": "vue-cli-service lint",
     "show-webpack-version": "webpack --version"