モバイル版でもデッキを使えるように (#4366)

* wip

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* Fix bug

* wip

* Update notifications.vue

* Update user-menu.vue

* deck settings

* indicate

src/client/app/init.ts

@@ -504,6 +504,13 @@ export default (callback: (launch: (router: VueRouter) => [Vue, MiOS], os: MiOS)
 			return [app, os] as [Vue, MiOS];
 		};
 
+		// Deck mode
+		os.store.commit('device/set', {
+			key: 'inDeckMode',
+			value: os.store.getters.isSignedIn && os.store.state.device.deckMode
+				&& (document.location.pathname === '/' || window.performance.navigation.type === 1)
+		});
+
 		callback(launch, os);
 	});
 };