perf: 框架核心代码国际化全量覆盖（仅需处理业务代码国际化即可） (#1082)

src/layout/index.vue

@@ -3,6 +3,7 @@ import "animate.css";
 // 引入 src/components/ReIcon/src/offlineIcon.ts 文件中所有使用addIcon添加过的本地图标
 import "@/components/ReIcon/src/offlineIcon";
 import { setType } from "./types";
+import { useI18n } from "vue-i18n";
 import { useLayout } from "./hooks/useLayout";
 import { useAppStoreHook } from "@/store/modules/app";
 import { useSettingStoreHook } from "@/store/modules/settings";
@@ -31,6 +32,7 @@ import Vertical from "./components/sidebar/vertical.vue";
 import Horizontal from "./components/sidebar/horizontal.vue";
 import backTop from "@/assets/svg/back_top.svg?component";
 
+const { t } = useI18n();
 const appWrapperRef = ref();
 const { isDark } = useDark();
 const { layout } = useLayout();
@@ -185,7 +187,7 @@ const layoutHeader = defineComponent({
       </div>
       <el-scrollbar v-else>
         <el-backtop
-          title="回到顶部"
+          :title="t('buttons.pureBackTop')"
           target=".main-container .el-scrollbar__wrap"
         >
           <backTop />