feat: 重构前端项目结构并添加组件样式

- 将视图组件重构为目录结构，提升模块化
- 引入 Phosphor Icons 图标库和 Less 预处理器
- 新增全局主题样式和组件专用样式文件
- 实现登录页面、布局组件及多个功能视图
- 添加数据管理、统计看板等核心功能界面

cwd-admin/package.json

@@ -8,14 +8,16 @@
     "build": "vite build"
   },
   "dependencies": {
+    "@phosphor-icons/vue": "^2.2.1",
+    "echarts": "^5.5.0",
     "vue": "^3.5.13",
-    "vue-router": "^4.4.5",
-    "echarts": "^5.5.0"
+    "vue-router": "^4.4.5"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.1.4",
+    "less": "^4.5.1",
     "typescript": "^5.5.2",
     "vite": "^6.0.11",
     "vue-tsc": "^2.1.10"
   }
-}
+}