feat: restore sablog browse modes and clean imported HTML

Keep the public site readable after import (nbsp, highlighter, wrapping code, compact pager) and finish the admin extras already in this tree: sticky levels, preview, page cache, and live llms.txt.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/partials/post-card.blade.php

@@ -1,11 +1,17 @@
-<article class="post-card {{ $post->is_sticky ? 'sticky' : '' }}">
+@php
+    $viewMode = $homeViewMode ?? \App\Blog\Support\HomeViewMode::LIST;
+    $showFull = $viewMode === \App\Blog\Support\HomeViewMode::FULL
+        && blank($post->read_password)
+        && empty(($post->meta ?? [])['members_only']);
+@endphp
+<article class="post-card {{ $post->isPinned() ? 'sticky' : '' }} post-card-{{ $viewMode }}">
     @if($url = $post->coverImageUrl())
         <a href="{{ route('posts.show', $post->id) }}" class="post-cover">
             <img src="{{ $url }}" alt="{{ $post->title }}" loading="lazy">
         </a>
     @endif
     <h2 class="post-title">
-        @if($post->is_sticky)<span class="badge">置顶</span>@endif
+        @if($label = $post->stickyLabel())<span class="badge">{{ $label }}</span>@endif
         <a href="{{ route('posts.show', $post->id) }}">{{ $post->title }}</a>
     </h2>
     <div class="post-meta">
@@ -17,9 +23,15 @@
         <span>· 阅读 {{ $post->views }}</span>
         <span>· 评论 {{ $post->comment_count }}</span>
     </div>
-    <div class="post-excerpt">
-        {{ Str::limit(strip_tags($post->excerpt_or_fallback), 200) }}
-    </div>
+    @if($showFull)
+        <div class="post-content">
+            {!! app(\App\Blog\Services\PostContentRenderer::class)->render($post) !!}
+        </div>
+    @else
+        <div class="post-excerpt">
+            {{ \Illuminate\Support\Str::limit($post->excerpt_or_fallback, 200) }}
+        </div>
+    @endif
     <div class="post-footer">
         <a href="{{ route('posts.show', $post->id) }}" class="read-more">阅读全文 &raquo;</a>
         @foreach($post->tags as $tag)