Initial baseline: LaraBlog core with plugin commerce surface.

Captures the current working tree after theme slots, ArticleAccess, and the payment / paid-content plugins so subsequent work has a reviewable git history.

tests/Feature/BlogFrontendTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Article;
+use App\Models\Category;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class BlogFrontendTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_home_and_article_legacy_urls(): void
+    {
+        $user = User::factory()->create();
+        $category = Category::query()->create(['name' => '随笔', 'display_order' => 0]);
+        $article = Article::query()->create([
+            'category_id' => $category->id,
+            'user_id' => $user->id,
+            'title' => 'Hello',
+            'content' => "## Hi\n\nworld",
+            'content_format' => 'markdown',
+            'published_at' => now()->subHour(),
+            'visible' => true,
+        ]);
+
+        $this->get('/')
+            ->assertOk()
+            ->assertSee('Hello')
+            ->assertSee('/themes/default/style.css', false);
+        $this->get('/show-'.$article->id.'.shtml')->assertOk()->assertSee('Hi');
+        $this->get('/tburl.php')->assertStatus(410);
+        $this->get('/llms.txt')->assertOk()->assertSee('Guidance for AI systems');
+        $this->get('/robots.txt')->assertOk()->assertSee('Sitemap:');
+        $this->get('/rss.xml')->assertOk();
+        $this->get('/sitemap.xml')->assertOk();
+    }
+}