feat(i18n): 添加国际化支持，更新语言切换功能

src/main.ts

@@ -4,6 +4,7 @@ import 'virtual:uno.css';
 
 import { createHead } from '@unhead/vue';
 import piniaPluginPersistedstate from 'pinia-plugin-persistedstate';
+import { createI18n } from 'vue-i18n';
 
 import { DataLoaderPlugin } from 'unplugin-vue-router/data-loaders';
 import App from './App.vue';
@@ -29,7 +30,25 @@ async function init() {
     // Register the plugin before the router
     .use(DataLoaderPlugin, { router })
     // adding the router will trigger the initial navigation
-    .use(router);
+    .use(router)
+    .use(
+      createI18n({
+        locale: 'zh_CN', // 默认显示语言
+        fallbackLocale: 'zh_CN',
+        messages: {
+          en_US: {
+            message: {
+              hello: 'hello',
+            },
+          },
+          zh_CN: {
+            message: {
+              hello: '你好',
+            },
+          },
+        },
+      }),
+    );
   app.config.globalProperties.$__DEV__ = $__DEV__;
   app.mount('#app');
 }