refactor(frontend): Reactivityで型を明示するように (#12791)

* refactor(frontend): Reactivityで型を明示するように

* fix: プロパティの参照が誤っているのを修正

* fix: 初期化の値を空配列に書き換えていた部分をnullに置き換え

packages/frontend/src/pages/registry.vue

@@ -23,6 +23,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { ref, computed } from 'vue';
+import * as Misskey from 'misskey-js';
 import JSON5 from 'json5';
 import * as os from '@/os.js';
 import { i18n } from '@/i18n.js';
@@ -31,7 +32,7 @@ import FormLink from '@/components/form/link.vue';
 import FormSection from '@/components/form/section.vue';
 import MkButton from '@/components/MkButton.vue';
 
-const scopesWithDomain = ref(null);
+const scopesWithDomain = ref<Misskey.entities.IRegistryScopesWithDomainResponse | null>(null);
 
 function fetchScopes() {
 	os.api('i/registry/scopes-with-domain').then(res => {