feat: add the booking board with floor plan and calendar

src/Controller/DashboardController.php

@@ -4,15 +4,55 @@ declare(strict_types=1);
 
 namespace App\Controller;
 
+use App\Booking\BoardPresenter;
+use App\Booking\DateParam;
+use App\Htmx\HxTrait;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Attribute\Route;
 
+/**
+ * The booking board: a month calendar next to the floor plan for the selected day.
+ */
 final class DashboardController extends AbstractController
 {
-    #[Route('/', name: 'app_dashboard', methods: ['GET'])]
-    public function index(): Response
+    use CurrentUserTrait;
+    use HxTrait;
+
+    public function __construct(private readonly BoardPresenter $board)
     {
-        return $this->render('dashboard/index.html.twig');
+    }
+
+    #[Route('/', name: 'app_dashboard', methods: ['GET'])]
+    public function index(Request $request): Response
+    {
+        $date = DateParam::parseOrToday($request->query->getString('tag'));
+
+        return $this->render('dashboard/index.html.twig', $this->board->context($date, $this->currentUser()));
+    }
+
+    /**
+     * Picking a day swaps the calendar and the floor plan in one response.
+     *
+     * This is the whole reason htmxOobResponse exists: two regions, one round trip, no
+     * client-side event choreography. Requests without the htmx header get a plain redirect
+     * rather than a bare pair of fragments, so the URL stays shareable.
+     */
+    #[Route('/tag/{date}', name: 'app_dashboard_day', requirements: ['date' => DateParam::PATTERN], methods: ['GET'])]
+    public function day(Request $request, string $date): Response
+    {
+        $selected = DateParam::parseOrToday($date);
+
+        if (!$request->headers->has('HX-Request')) {
+            return $this->redirectToRoute('app_dashboard', ['tag' => $selected->format('Y-m-d')]);
+        }
+
+        return $this->htmxOobResponse(
+            'dashboard/index.html.twig',
+            ['calendar', 'floorplan'],
+            $this->board->context($selected, $this->currentUser()),
+            $this->generateUrl('app_dashboard', ['tag' => $selected->format('Y-m-d')]),
+        );
     }
 }