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>

app/Console/Commands/FixImportedContent.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Console\Commands;
+
+use App\Blog\Support\SablogHtmlNormalizer;
+use App\Models\Post;
+use Illuminate\Console\Command;
+
+class FixImportedContent extends Command
+{
+    protected $signature = 'sablog:fix-content
+        {--all : Repair every post}
+        {id? : Single post ID}
+        {--dry-run : Preview only}';
+
+    protected $description = 'Clean leftover SaBlog HTML: literal &nbsp;, highlighter blocks, stacked docker divs';
+
+    public function handle(SablogHtmlNormalizer $normalizer): int
+    {
+        $query = Post::query();
+
+        if ($id = $this->argument('id')) {
+            $query->where('id', $id);
+        } elseif (! $this->option('all')) {
+            $this->error('Pass a post ID or use --all');
+
+            return self::FAILURE;
+        }
+
+        $posts = $query->get();
+        if ($posts->isEmpty()) {
+            $this->info('No posts to repair');
+
+            return self::SUCCESS;
+        }
+
+        $changed = 0;
+        foreach ($posts as $post) {
+            $cleaned = $normalizer->normalize((string) $post->content);
+            if ($cleaned === $post->content) {
+                continue;
+            }
+
+            if ($this->option('dry-run')) {
+                $this->line("[{$post->id}] {$post->title}");
+                continue;
+            }
+
+            $post->content = $cleaned;
+            $post->save();
+            $changed++;
+        }
+
+        $this->info($this->option('dry-run')
+            ? 'Preview only, nothing written'
+            : "Repaired {$changed} posts");
+
+        return self::SUCCESS;
+    }
+}