更新 package.json 和 pnpm-lock.yaml，添加 class-variance-authority 依赖；修改 main.tsx 中的 basename 引入方式；新增 theme.css 样式文件

src/main.tsx

@@ -2,10 +2,12 @@ import ReactDOM from 'react-dom/client'
 import { RouterProvider, createRouter } from '@tanstack/react-router'
 import { routeTree } from './routeTree.gen'
 import './index.css'
+import { basename } from './modules/basename'
 
 // Set up a Router instance
 const router = createRouter({
   routeTree,
+  basepath: basename,
   defaultPreload: 'intent',
   scrollRestoration: true,
 })