v3-admin-vite/src/App.vue

<template>
  <ElConfigProvider :locale="locale">
    <router-view />
  </ElConfigProvider>
</template>

<script lang="ts" setup>
import { ElConfigProvider } from "element-plus"
import zhCn from "element-plus/lib/locale/lang/zh-cn"
import { useAppStore } from "@/store/modules/app"

const locale = zhCn // element-plus 设置为中文

useAppStore().initTheme() // 初始化 Theme
</script>