feat: add landing page templates and registration modal

- Implemented header and hero section in _header.html.twig and _hero_art.html.twig.
- Created a pre-registration modal in _reg_modal.html.twig with form fields and validation.
- Added page scripts for dynamic behavior and interaction in _page_scripts.html.twig.
- Developed landing page structure in landing.html.twig, integrating header, footer, and modal.
- Introduced tests for landing page rendering and registry validation in LandingPageTest.php and LandingRegistryTest.php.

src/Shared/Controller/SeoController.php

@@ -2,6 +2,7 @@
 
 namespace App\Shared\Controller;
 
+use App\Shared\Landing\LandingRegistry;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -9,6 +10,8 @@ use Symfony\Component\Routing\Attribute\Route;
 
 class SeoController extends AbstractController
 {
+    public function __construct(private readonly LandingRegistry $landings) {}
+
     #[Route('/robots.txt', name: 'seo_robots', methods: ['GET'])]
     public function robots(Request $request): Response
     {
@@ -30,18 +33,30 @@ class SeoController extends AbstractController
     public function sitemap(Request $request): Response
     {
         $base = $request->getSchemeAndHttpHost();
+
         $xml = '<?xml version="1.0" encoding="UTF-8"?>' . "\n"
             . '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n"
-            . '  <url>' . "\n"
-            . "    <loc>{$base}/</loc>\n"
-            . '    <changefreq>weekly</changefreq>' . "\n"
-            . '    <priority>1.0</priority>' . "\n"
-            . '  </url>' . "\n"
-            . '</urlset>' . "\n";
+            . $this->urlNode("{$base}/", 'weekly', '1.0');
+
+        // اسلاگ‌ها فارسی‌اند و باید percent-encode شوند، وگرنه XML نامعتبر است.
+        foreach ($this->landings->all() as $page) {
+            $xml .= $this->urlNode($base . '/' . rawurlencode($page->slug), 'monthly', '0.8');
+        }
+
+        $xml .= '</urlset>' . "\n";
 
         return new Response($xml, Response::HTTP_OK, ['Content-Type' => 'application/xml; charset=UTF-8']);
     }
 
+    private function urlNode(string $loc, string $changefreq, string $priority): string
+    {
+        return '  <url>' . "\n"
+            . '    <loc>' . htmlspecialchars($loc, ENT_XML1) . '</loc>' . "\n"
+            . "    <changefreq>{$changefreq}</changefreq>\n"
+            . "    <priority>{$priority}</priority>\n"
+            . '  </url>' . "\n";
+    }
+
     private function isStaging(Request $request): bool
     {
         $host = $request->getHost();