feat: Markdown 正文自动 TOC（锚点+折叠目录）+ 社交账号扩充国内平台（B站/小红书/抖音/视频号/公众号/其他）+ 侧边栏社交展示 + JSON-LD sameAs 全平台聚合 + 首页 h1（SEO 语义）

resources/views/index.blade.php

@@ -3,6 +3,7 @@
 @include('partials.header')
 <div class="container main-layout">
     <main class="content">
+        <h1 class="sr-only">{{ $siteName }}</h1>
         @if(session('success'))
             <div class="alert alert-success">{{ session('success') }}</div>
         @endif

resources/views/partials/sidebar.blade.php

@@ -62,6 +62,19 @@
         </ul>
     </section>
 
+    <section class="widget">
+        <h3>社交账号</h3>
+        <ul class="social-links">
+            @foreach($socialLinks as $social)
+                @if($social['url'])
+                    <li><a href="{{ $social['url'] }}" target="_blank" rel="noopener nofollow">{{ $social['platform'] }}</a></li>
+                @else
+                    <li>{{ $social['platform'] }}：{{ $social['value'] }}</li>
+                @endif
+            @endforeach
+        </ul>
+    </section>
+
     <section class="widget">
         <h3 class="widget-title">站点统计</h3>
         <ul class="widget-list">

resources/views/show.blade.php

@@ -16,6 +16,20 @@
         @endif
 
         <article class="post-full">
+            @if(! empty($toc))
+                <nav class="toc" aria-label="文章目录">
+                    <details open>
+                        <summary>目录</summary>
+                        <ol class="toc-list">
+                            @foreach($toc as $item)
+                                <li class="toc-level-{{ $item['level'] }}">
+                                    <a href="#{{ $item['id'] }}">{{ $item['text'] }}</a>
+                                </li>
+                            @endforeach
+                        </ol>
+                    </details>
+                </nav>
+            @endif
             @if($cover = $post->getFirstMedia('cover'))
                 <div class="post-cover">
                     <img src="{{ $cover->getUrl('card') ?: $cover->getUrl() }}" alt="{{ $post->title }}">