feat: selectable drop-offs for inbound bus travel

src/Service/BookingEditDraftService.php

@@ -401,6 +401,15 @@ class BookingEditDraftService
             }
         }
 
+        // Drop-off (single) - merge strategy: only apply if resolves to valid drop-off
+        if (true === array_key_exists('dropOff', $data) && null !== $data['dropOff']) {
+            $resolved = $this->resolveDropOff($data['dropOff'], $travel);
+            if (null !== $resolved) {
+                $participant->dropOff = $resolved;
+                $participant->differentDropOff = true;
+            }
+        }
+
         // Parking (boolean) - overwrite strategy: user can uncheck
         if (true === array_key_exists('parking', $data)) {
             $participant->parking = (bool) $data['parking'];
@@ -482,7 +491,19 @@ class BookingEditDraftService
             return null;
         }
 
-        return $travel->pickupsOutbound[$pickupId] ?? $travel->pickupsInbound[$pickupId] ?? null;
+        return $travel->pickups[$pickupId] ?? $travel->dropOffs[$pickupId] ?? null;
+    }
+
+    /**
+     * Resolves a drop-off ID to a Pickup object from the travel drop-offs list.
+     */
+    private function resolveDropOff(?int $dropOffId, Travel $travel): ?object
+    {
+        if (null === $dropOffId) {
+            return null;
+        }
+
+        return $travel->dropOffs[$dropOffId] ?? null;
     }
 
     /**