feat: 仅在文章页面启用目录功能并修复 TOC 初始化逻辑

src/routes/[slug]/+page.svelte

@@ -1,52 +1,9 @@
 <script lang="ts">
 	import { page } from '$app/stores';
 	import type { PageData } from './$types';
-	import { onMount } from 'svelte';
-	import tocbot from 'tocbot';
 	import MarkdownRenderer from '$lib/components/MarkdownRenderer.svelte';
 	
-	let sidebarShow = $state(true);
-	
 	let { data }: { data: PageData } = $props();
-
-	onMount(() => {
-		tocbot.init({
-			tocSelector: '.js-toc',
-			contentSelector: '.js-toc-content',
-			headingSelector: 'h1, h2, h3, h4, h5',
-			hasInnerContainers: false,
-			linkClass: 'toc-link',
-			activeLinkClass: 'is-active-link',
-			listClass: 'toc-list',
-			isCollapsedClass: 'is-collapsed',
-			collapsibleClass: 'is-collapsible',
-			listItemClass: 'toc-list-item',
-			collapseDepth: 0,
-			scrollSmooth: true,
-			headingsOffset: 20
-		});
-
-		if (window.innerWidth < 1200) {
-			sidebarShow = false;
-		}
-
-		$effect(() => {
-			if (sidebarShow) {
-				document.body.classList.add('sidebar-show');
-			} else {
-				document.body.classList.remove('sidebar-show');
-			}
-			
-			return () => {
-				document.body.classList.remove('sidebar-show');
-			};
-		});
-
-		return () => {
-			tocbot.destroy();
-		};
-	});
-
 </script>
 
 <svelte:head>
@@ -64,17 +21,5 @@
 		</article>
 	</div>
 
-	<!-- TOC Overlay and Sidebar -->
-	<!-- svelte-ignore a11y_click_events_have_key_events -->
-	<!-- svelte-ignore a11y_no_static_element_interactions -->
-	<div class="toc-mask" onclick={() => sidebarShow = false}></div>
-	<div class="TOC" aria-label="{$page.data.aliases?.page || '页面'}目录">
-		<div class="js-toc"></div>
-	</div>
 
-	<!-- svelte-ignore a11y_click_events_have_key_events -->
-	<!-- svelte-ignore a11y_no_static_element_interactions -->
-	<div id="toggle-toc" class="ctrler-item" onclick={() => sidebarShow = !sidebarShow}>
-		<svg aria-hidden="true" focusable="false" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" width="16" height="16"><path fill="currentColor" d="M257.5 445.1l-22.2 22.2c-9.4 9.4-24.6 9.4-33.9 0L27 273c-9.4-9.4-9.4-24.6 0-33.9L201.4 44.7c9.4-9.4 24.6-9.4 33.9 0l22.2 22.2c9.5 9.5 9.3 25-.4 34.3L136.6 216H424c13.3 0 24 10.7 24 24v32c0 13.3-10.7 24-24 24H136.6l120.5 120.8c9.8 9.3 10 24.8.4 34.3z"></path></svg>
-	</div>
 </main>

src/routes/posts/[slug]/+page.svelte

@@ -1,15 +1,20 @@
 <script lang="ts">
 	import { page } from '$app/stores';
 	import type { PageData } from './$types';
-	import { onMount } from 'svelte';
+	import { onMount, tick } from 'svelte';
 	import tocbot from 'tocbot';
 	import MarkdownRenderer from '$lib/components/MarkdownRenderer.svelte';
 	
 	let sidebarShow = $state(true);
+	let hasToc = $state(false);
 	
 	let { data }: { data: PageData } = $props();
 
 	onMount(() => {
+		const headers = document.querySelectorAll('.js-toc-content h1, .js-toc-content h2, .js-toc-content h3, .js-toc-content h4, .js-toc-content h5, .js-toc-content h6');
+		if (headers.length > 0) {
+			hasToc = true;
+			tick().then(() => {
 				tocbot.init({
 					tocSelector: '.js-toc',
 					contentSelector: '.js-toc-content',
@@ -29,9 +34,11 @@
 				if (window.innerWidth < 1200) {
 					sidebarShow = false;
 				}
+			});
+		}
 
 		$effect(() => {
-			if (sidebarShow) {
+			if (hasToc && sidebarShow) {
 				document.body.classList.add('sidebar-show');
 			} else {
 				document.body.classList.remove('sidebar-show');
@@ -43,7 +50,7 @@
 		});
 
 		return () => {
-			tocbot.destroy();
+			if (hasToc) tocbot.destroy();
 		};
 	});
 
@@ -76,6 +83,7 @@
 		</article>
 	</div>
 
+	{#if hasToc}
 	<!-- TOC Overlay and Sidebar -->
 	<!-- svelte-ignore a11y_click_events_have_key_events -->
 	<!-- svelte-ignore a11y_no_static_element_interactions -->
@@ -89,4 +97,5 @@
 	<div id="toggle-toc" class="ctrler-item" onclick={() => sidebarShow = !sidebarShow}>
 		<svg aria-hidden="true" focusable="false" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" width="16" height="16"><path fill="currentColor" d="M257.5 445.1l-22.2 22.2c-9.4 9.4-24.6 9.4-33.9 0L27 273c-9.4-9.4-9.4-24.6 0-33.9L201.4 44.7c9.4-9.4 24.6-9.4 33.9 0l22.2 22.2c9.5 9.5 9.3 25-.4 34.3L136.6 216H424c13.3 0 24 10.7 24 24v32c0 13.3-10.7 24-24 24H136.6l120.5 120.8c9.8 9.3 10 24.8.4 34.3z"></path></svg>
 	</div>
+	{/if}
 </main>