feat: remove room selection field entirely for single room type

addresses #869axcukn

src/Form/Model/BookingDto.php

@@ -151,6 +151,30 @@ class BookingDto
         return null !== $this->booking && 'O' === $this->booking->status;
     }
 
+    /**
+     * Gets the label of the single selected room type.
+     *
+     * Returns the room label when exactly one room type is selected (auto-assignment scenario).
+     * Used by templates to display the room assignment when the dropdown is hidden.
+     *
+     * @return string|null The room label or null if not a single room type scenario
+     */
+    public function getSingleRoomLabel(): ?string
+    {
+        $selectedRooms = $this->getSelectedRooms();
+
+        // Only return label when exactly one room type selected
+        if (1 !== count($selectedRooms)) {
+            return null;
+        }
+
+        $roomSelection = reset($selectedRooms);
+        $availableRooms = $this->travel->getAvailableRooms();
+        $room = $availableRooms[$roomSelection->roomId] ?? null;
+
+        return $room?->label;
+    }
+
     #[Assert\Callback(callback: 'validateRoomSelection', groups: ['booking_create_step_1'])]
     public function validateRoomSelection(ExecutionContextInterface $context): void
     {