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）

app/Blog/Controllers/PostController.php

@@ -32,9 +32,14 @@ class PostController extends Controller
             ->orderBy('created_at', (int) blog_setting('comment_order', 1) === 1 ? 'asc' : 'desc')
             ->paginate(20);
 
-        $contentHtml = $this->renderer->render($post);
+        $rendered = $this->renderer->renderWithToc($post);
 
-        return theme_view('show', compact('post', 'comments', 'contentHtml'));
+        return theme_view('show', [
+            'post' => $post,
+            'comments' => $comments,
+            'contentHtml' => $rendered['html'],
+            'toc' => $rendered['toc'],
+        ]);
     }
 
     private function ensureReadable(Post $post): void

app/Blog/Services/PostContentRenderer.php

@@ -46,6 +46,43 @@ class PostContentRenderer
         return app(\App\Blog\Support\PluginManager::class)->applyFilters('post.rendered', $html, $post);
     }
 
+    /**
+     * 渲染并提取目录（TOC）。
+     *
+     * @return array{html: string, toc: array<int, array{id: string, text: string, level: int}>}
+     */
+    public function renderWithToc(Post $post): array
+    {
+        $html = $this->render($post);
+
+        $toc = [];
+        $index = 0;
+
+        $html = preg_replace_callback(
+            '/<h([2-6])([^>]*)>(.*?)<\/h\1>/is',
+            function (array $m) use (&$toc, &$index): string {
+                $level = (int) $m[1];
+                $attrs = $m[2];
+                $text = trim(strip_tags($m[3]));
+                $id = 'toc-'.(++$index);
+
+                $toc[] = ['id' => $id, 'text' => $text, 'level' => $level];
+
+                // 已存在 id 则保留原 id，否则注入锚点
+                if (preg_match('/id="([^"]+)"/', $attrs, $idMatch)) {
+                    $toc[array_key_last($toc)]['id'] = $idMatch[1];
+
+                    return $m[0];
+                }
+
+                return '<h'.$level.$attrs.' id="'.$id.'">'.$m[3].'</h'.$level.'>';
+            },
+            $html
+        );
+
+        return ['html' => $html, 'toc' => $toc];
+    }
+
     public function toHtml(string $markdown): string
     {
         return $this->converter->convert($markdown)->getContent();

app/Blog/Support/SocialLinks.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Blog\Support;
+
+use App\Models\Setting;
+
+/**
+ * 社交账号聚合：后台「社交账号」Tab 配置 -> 前端展示 + SEO sameAs。
+ */
+class SocialLinks
+{
+    public const PLATFORMS = [
+        'social_weibo' => '微博',
+        'social_zhihu' => '知乎',
+        'social_bilibili' => '哔哩哔哩',
+        'social_xiaohongshu' => '小红书',
+        'social_douyin' => '抖音',
+        'social_wechat_channel' => '视频号',
+        'social_wechat_public' => '微信公众号',
+        'social_github' => 'GitHub',
+        'social_twitter' => 'Twitter / X',
+        'social_facebook' => 'Facebook',
+        'social_email' => '邮箱',
+    ];
+
+    /**
+     * 全部社交账号：['platform' => 平台名, 'value' => URL/名称, 'url' => 是否为外链]。
+     */
+    public static function all(): array
+    {
+        $items = [];
+
+        foreach (self::PLATFORMS as $key => $platform) {
+            $value = trim((string) Setting::get($key, ''));
+            if ($value === '') {
+                continue;
+            }
+            $items[] = [
+                'platform' => $platform,
+                'value' => $value,
+                'url' => filter_var($value, FILTER_VALIDATE_URL) ? $value : null,
+            ];
+        }
+
+        // 其他平台（KeyValue）
+        $other = Setting::get('social_other', []);
+        $other = is_array($other) ? $other : (json_decode((string) $other, true) ?: []);
+        foreach ($other as $platform => $value) {
+            if (trim((string) $value) === '') {
+                continue;
+            }
+            $items[] = [
+                'platform' => (string) $platform,
+                'value' => (string) $value,
+                'url' => filter_var((string) $value, FILTER_VALIDATE_URL) ? (string) $value : null,
+            ];
+        }
+
+        return $items;
+    }
+
+    /**
+     * 可进 JSON-LD sameAs 的 URL 列表。
+     */
+    public static function sameAs(): array
+    {
+        return array_values(array_unique(array_filter(array_map(
+            fn (array $item) => $item['url'],
+            self::all()
+        ))));
+    }
+}

app/Blog/View/Composers/SidebarComposer.php

@@ -62,6 +62,8 @@ class SidebarComposer
             ];
         }));
 
+        $view->with('socialLinks', \App\Blog\Support\SocialLinks::all());
+
         $view->with('siteName', blog_setting('site_name', config('blog.name')));
         $view->with('siteDescription', blog_setting('site_description', config('blog.description')));
         $view->with('siteIcp', blog_setting('site_icp', config('blog.icp')));