build(前端): 配置部署子路径并修复html末尾换行

配置vite的base为/app_03/、路由的basename为/app_03，同时修复index.html缺少末尾换行的问题

frontend/vite.config.ts

@@ -5,6 +5,7 @@ import react from '@vitejs/plugin-react'
 import basicSsl from '@vitejs/plugin-basic-ssl'
 
 export default defineConfig({
+  base: '/app_03/',
   plugins: [
     // The React and Tailwind plugins are both required for Make, even if
     // Tailwind is not being actively used – do not remove them