feat: unify pickup selection

src/Form/Model/ParticipantDto.php

@@ -27,8 +27,7 @@ class ParticipantDto
         'skiPass',
         'transportationOutbound',
         'transportationInbound',
-        'pickupOutbound',
-        'pickupInbound',
+        'pickup',
         'parking',
         'licensePlate',
         'bulkInsuranceBooking',
@@ -86,9 +85,8 @@ class ParticipantDto
     public ?Service $transportationOutbound = null;
     public ?Service $transportationInbound = null;
 
-    // Pickup locations for each direction
-    public ?Pickup $pickupOutbound = null;
-    public ?Pickup $pickupInbound = null;
+    // Pickup location (applies to both directions)
+    public ?Pickup $pickup = null;
 
     // Parking service for self-organized transportation (boolean: true if parking requested)
     public bool $parking = false;