fix onBeforeRouteLeave

fixes https://github.com/misskey-dev/misskey/issues/8861

packages/client/src/pages/theme-editor.vue

@@ -1,4 +1,5 @@
-<template><MkStickyContainer>
+<template>
+<MkStickyContainer>
 	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
 	<MkSpacer :content-max="800" :margin-min="16" :margin-max="32">
 		<div class="cwepdizn _formRoot">
@@ -62,7 +63,8 @@
 				</div>
 			</FormFolder>
 		</div>
-</MkSpacer></MkStickyContainer>
+	</MkSpacer>
+</MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
@@ -85,6 +87,7 @@ import { ColdDeviceStorage, defaultStore } from '@/store';
 import { addTheme } from '@/theme-store';
 import { i18n } from '@/i18n';
 import { useLeaveGuard } from '@/scripts/use-leave-guard';
+import { definePageMetadata } from '@/scripts/page-metadata';
 
 const bgColors = [
 	{ color: '#f5f5f5', kind: 'light', forPreview: '#f5f5f5' },
@@ -204,7 +207,17 @@ async function saveAs() {
 
 watch($$(theme), apply, { deep: true });
 
-const headerActions = $computed(() => []);
+const headerActions = $computed(() => [{
+	asFullButton: true,
+	icon: 'fas fa-eye',
+	text: i18n.ts.preview,
+	handler: showPreview,
+}, {
+	asFullButton: true,
+	icon: 'fas fa-check',
+	text: i18n.ts.saveAs,
+	handler: saveAs,
+}]);
 
 const headerTabs = $computed(() => []);
 
@@ -212,17 +225,6 @@ definePageMetadata({
 	title: i18n.ts.themeEditor,
 	icon: 'fas fa-palette',
 	bg: 'var(--bg)',
-	actions: [{
-		asFullButton: true,
-		icon: 'fas fa-eye',
-		text: i18n.ts.preview,
-		handler: showPreview,
-	}, {
-		asFullButton: true,
-		icon: 'fas fa-check',
-		text: i18n.ts.saveAs,
-		handler: saveAs,
-	}],
 });
 </script>
 

packages/client/src/scripts/use-leave-guard.ts

@@ -3,6 +3,7 @@ import { i18n } from '@/i18n';
 import * as os from '@/os';
 
 export function useLeaveGuard(enabled: Ref<boolean>) {
+	/* TODO
 	const setLeaveGuard = inject('setLeaveGuard');
 
 	if (setLeaveGuard) {
@@ -28,6 +29,7 @@ export function useLeaveGuard(enabled: Ref<boolean>) {
 			return !canceled;
 		});
 	}
+	*/
 
 	/*
 	function onBeforeLeave(ev: BeforeUnloadEvent) {