enhance(client): Deckで非ルートページにアクセスした際に簡易UIで表示しない設定を追加

packages/frontend/src/pages/settings/deck.vue

@@ -1,5 +1,7 @@
 <template>
 <div class="_gaps_m">
+	<MkSwitch v-model="useSimpleUiForNonRootPages">{{ i18n.ts._deck.useSimpleUiForNonRootPages }}</MkSwitch>
+
 	<MkSwitch v-model="navWindow">{{ i18n.ts.defaultNavigationBehaviour }}: {{ i18n.ts.openInWindow }}</MkSwitch>
 
 	<MkSwitch v-model="alwaysShowMainColumn">{{ i18n.ts._deck.alwaysShowMainColumn }}</MkSwitch>
@@ -21,6 +23,7 @@ import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
 
 const navWindow = computed(deckStore.makeGetterSetter('navWindow'));
+const useSimpleUiForNonRootPages = computed(deckStore.makeGetterSetter('useSimpleUiForNonRootPages'));
 const alwaysShowMainColumn = computed(deckStore.makeGetterSetter('alwaysShowMainColumn'));
 const columnAlign = computed(deckStore.makeGetterSetter('columnAlign'));