KGPython/vue/src/main.js

import { createApp } from 'vue'
import App from './App.vue'
import router from './router' // 👈 引入路由
// 引入 Element Plus
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css' // 引入样式

const app = createApp(App)
app.use(router) // 👈 关键！注册 router 插件
app.use(ElementPlus) // 全局注册
app.mount('#app')