feat: render game grid as React component via SymfonyUX

src/Controller/HomepageController.php

@@ -64,9 +64,15 @@ class HomepageController extends AbstractController
         $width = $rightSize + $leftSize + 1;
         $middle = $leftSize;
 
+        // Build JSON-serializable grid for React
+        $grid = array_map(fn (array $actorData) => [
+            'actorName' => $actorData['actor']->getName(),
+            'actorId' => $actorData['actor']->getId(),
+            'pos' => $actorData['pos'],
+        ], $actors);
+
         return $this->render('homepage/index.html.twig', [
-            'mainActor' => $mainActor,
-            'actors' => $actors,
+            'grid' => $grid,
             'width' => $width,
             'middle' => $middle,
         ]);