uniapp使用vue3后反向代理问题

manifest.json设置VUE版本3

根目录新建vite.config.js文件

import { defineConfig } from 'vite'  

export default defineConfig({  
    server: {  
        port : 3001,  
        proxy: {  
            '/api': {  
                target: 'http://jsonplaceholder.typicode.com',  
                changeOrigin: true,  
                rewrite: (path) => path.replace(/^\/api/, '')  
            },  
        }  
    }  
})

运行时报错

10:26:32.866 正在编译中...  
10:26:33.062 Port 3000 is in use, trying another one...  
10:26:33.064   vite v2.9.5 dev server running at:  
10:26:33.065   > Local: http://localhost:3001/  
10:26:33.067   > Network: use `--host` to expose  
10:26:33.072   ready in 811ms.  
10:26:33.117 The following dependencies are imported but could not be resolved:  
10:26:33.119   vue (imported by E:/flx-code/uni-app-sxrd/main.js)  
10:26:33.121   vuex (imported by E:/flx-code/uni-app-sxrd/store/index.js)  
10:26:33.125 Are they installed?

大佬们，我是不是用错了，怎么解决啊

尝试：直接npm i安装 vue和vuex这个报错没了，但是App.vue就不能用了...