enhance(frontend): ウィジェットを非表示にできるPageMetaを追加 (#12456)

* (enhance) ウィジェットを非表示にできるPageMetaを追加

* fix lint

* rename

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/pages/admin/index.vue

@@ -261,6 +261,7 @@ provideMetadataReceiver((info) => {
 		childInfo.value = null;
 	} else {
 		childInfo.value = info;
+		INFO.value.needWideArea = info.value.needWideArea ?? undefined;
 	}
 });
 
@@ -268,7 +269,7 @@ function invite() {
 	os.api('admin/invite/create').then(x => {
 		os.alert({
 			type: 'info',
-			text: x?.[0].code,
+			text: x[0].code,
 		});
 	}).catch(err => {
 		os.alert({