feat: automatically assign rooms only for unique room type selection

tests/Service/ParticipantCardDataServiceTest.php

@@ -167,7 +167,7 @@ class ParticipantCardDataServiceTest extends TestCase
         $this->assertEquals('Unbekanntes Zimmer', $result['roomName']);
     }
 
-    public function testGetCardDataWithZeroPrice(): void
+    public function testGetCardDataWithZeroPriceAndNoRoom(): void
     {
         $travel = new Travel();
         $travel->rooms = [];
@@ -175,6 +175,7 @@ class ParticipantCardDataServiceTest extends TestCase
         $participant = new ParticipantDto();
         $participant->firstName = 'Max';
         $participant->lastName = 'Mustermann';
+        $participant->assignedRoomId = null; // No room assigned
 
         $bookingDto = new BookingDto($travel, 1);
         $bookingDto->participants = [$participant];
@@ -185,6 +186,36 @@ class ParticipantCardDataServiceTest extends TestCase
 
         $result = $this->service->getCardData($bookingDto, 0);
 
+        // When no room assigned and price is zero, display dash (incomplete configuration)
+        $this->assertEquals('-', $result['price']);
+    }
+
+    public function testGetCardDataWithZeroPriceButRoomAssigned(): void
+    {
+        // Create test room
+        $room = new Room();
+        $room->id = 1;
+        $room->label = 'Doppelzimmer';
+        $room->price = 0.0;
+
+        $travel = new Travel();
+        $travel->rooms = [$room];
+
+        $participant = new ParticipantDto();
+        $participant->firstName = 'Max';
+        $participant->lastName = 'Mustermann';
+        $participant->assignedRoomId = 1; // Room is assigned
+
+        $bookingDto = new BookingDto($travel, 1);
+        $bookingDto->participants = [$participant];
+
+        $this->priceCalculator
+            ->method('calculateAllParticipantIndividualPrices')
+            ->willReturn([0.0]);
+
+        $result = $this->service->getCardData($bookingDto, 0);
+
+        // When room is assigned but price is zero, display formatted zero price
         $this->assertEquals('0,00 €', $result['price']);
     }