feat: selectable drop-offs for inbound bus travel

src/Form/Service/EditFieldStateProvider.php

@@ -197,6 +197,25 @@ class EditFieldStateProvider extends AbstractFieldStateProvider
             'readonly' => $pickupsMutabilityCondition,
         ];
 
+        // Show differentDropOff checkbox only when BOTH outbound and inbound are BUS, readonly if pickups not mutable
+        $this->fieldStateConditions['differentDropOff'] = [
+            'hidden' => CompositeCondition::not(
+                CompositeCondition::and(
+                    ServiceSubTypeCondition::equals('transportationOutbound', DirectionMapper::SUBTYPE_BUS_API),
+                    ServiceSubTypeCondition::equals('transportationInbound', DirectionMapper::SUBTYPE_BUS_API)
+                )
+            ),
+            'readonly' => $pickupsMutabilityCondition,
+        ];
+
+        // Show drop-off when inbound is BUS (options provider further gates on checkbox state in BUS+BUS)
+        $this->fieldStateConditions['dropOff'] = [
+            'hidden' => CompositeCondition::not(
+                ServiceSubTypeCondition::equals('transportationInbound', DirectionMapper::SUBTYPE_BUS_API)
+            ),
+            'readonly' => $pickupsMutabilityCondition,
+        ];
+
         // Parking - shown only when outbound transportation is PKW AND participant is 18+, readonly if transportation not mutable
         // Participants under 18 cannot drive in Germany, so parking is not relevant for them
         $minimumDrivingAgeCondition = new AgeRangeCondition(18);