refactor(frontend): popupMenuの項目作成時に三項演算子をなるべく使わないように (#14554)

* refactor(frontend): popupMenuの項目作成時に三項演算子をなるべく使わないように

* type import

* fix

* lint

packages/frontend/src/components/MkContextMenu.vue

@@ -20,7 +20,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { onMounted, onBeforeUnmount, shallowRef, ref } from 'vue';
 import MkMenu from './MkMenu.vue';
-import { MenuItem } from '@/types/menu.js';
+import type { MenuItem } from '@/types/menu.js';
 import contains from '@/scripts/contains.js';
 import { defaultStore } from '@/store.js';
 import * as os from '@/os.js';