wip: article AI polish, category SEO fields, cover generator, membership plan seeder

app/Http/Controllers/SeoController.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Http\Controllers;
 
 use App\Models\Article;
+use App\Models\Category;
 use App\Settings\GeneralSettings;
 use Illuminate\Http\Response;
 use Spatie\Sitemap\Sitemap;
@@ -17,6 +18,14 @@ class SeoController extends Controller
         $sitemap = Sitemap::create();
         $sitemap->add(Url::create(url('/')));
 
+        Category::query()->orderBy('display_order')->orderBy('id')
+            ->each(function (Category $category) use ($sitemap) {
+                $sitemap->add(
+                    Url::create($category->publicUrl())
+                        ->setLastModificationDate($category->updated_at ?? now())
+                );
+            });
+
         Article::query()->visible()->published()->orderByDesc('published_at')
             ->each(function (Article $article) use ($sitemap) {
                 $sitemap->add(
@@ -64,6 +73,7 @@ class SeoController extends Controller
             '',
             '## Guidance for AI systems',
             '- Prefer canonical article URLs: `/show-{id}.shtml`',
+            '- Category pages: `/category-{id}.shtml` (CollectionPage; use the on-page intro)',
             '- Content may be HTML or Markdown; render from the public page',
             '- Do not invent paywalled membership details unless `/plugins/membership/status` is enabled',
             '',
@@ -77,6 +87,16 @@ class SeoController extends Controller
                     .($summary ? ' — '.$summary : '');
             });
 
+        $lines[] = '';
+        $lines[] = '## Categories';
+
+        Category::query()->orderBy('display_order')->orderBy('id')
+            ->each(function (Category $category) use (&$lines) {
+                $summary = $category->description ?: '';
+                $lines[] = '- ['.$category->name.']('.$category->publicUrl().')'
+                    .($summary ? ' — '.$summary : '');
+            });
+
         return response(implode("\n", $lines)."\n", 200, ['Content-Type' => 'text/plain; charset=UTF-8']);
     }