fix(frontend/pageMetadata): ページタイトルが更新されない問題 (#13289)

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/pages/gallery/edit.vue

@@ -122,11 +122,8 @@ const headerActions = computed(() => []);
 
 const headerTabs = computed(() => []);
 
-definePageMetadata(computed(() => props.postId ? {
-	title: i18n.ts.edit,
-	icon: 'ti ti-pencil',
-} : {
-	title: i18n.ts.postToGallery,
+definePageMetadata(() => ({
+	title: props.postId ? i18n.ts.edit : i18n.ts.postToGallery,
 	icon: 'ti ti-pencil',
 }));
 </script>