refactor(frontend): 非推奨となったReactivity Transformを使わないように (#12539)

* refactor(frontend): 非推奨となったReactivity Transformを使わないように

* refactor: 不要な括弧を除去

* fix: 不要なアノテーションを除去

* fix: Refの配列をrefしている部分の対応

* refactor: 不要な括弧を除去

* fix: lint

* refactor: Ref、ShallowRef、ComputedRefの変数の宣言をletからconstに置換

* fix: type error

* chore: drop reactivity transform from eslint configuration

* refactor: remove unnecessary import

* fix: 対応漏れ

packages/frontend/src/pages/settings/custom-css.vue

@@ -14,7 +14,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { ref, watch } from 'vue';
+import { ref, watch, computed } from 'vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 import FormInfo from '@/components/MkInfo.vue';
 import * as os from '@/os.js';
@@ -41,9 +41,9 @@ watch(localCustomCss, async () => {
 	await apply();
 });
 
-const headerActions = $computed(() => []);
+const headerActions = computed(() => []);
 
-const headerTabs = $computed(() => []);
+const headerTabs = computed(() => []);
 
 definePageMetadata({
 	title: i18n.ts.customCss,