feat: split booking between participants and applicant

addresses #869f2q1vu

src/Form/Service/CreateFieldStateProvider.php

@@ -17,10 +17,10 @@ use App\Form\Service\Condition\FieldValueCondition;
 use App\Form\Service\Condition\FinalBookingOnlyCondition;
 use App\Form\Service\Condition\FirstParticipantCondition;
 use App\Form\Service\Condition\FirstParticipantReadOnlyCondition;
+use App\Form\Service\Condition\FirstParticipantSuppliesApplicantDataCondition;
 use App\Form\Service\Condition\MultipleParticipantsCondition;
 use App\Form\Service\Condition\RentalInsuranceAvailableCondition;
 use App\Form\Service\Condition\RentalSelectionCondition;
-use App\Form\Service\Condition\RequiresOwnEmailCondition;
 use App\Form\Service\Condition\RoomSelectionCondition;
 use App\Form\Service\Condition\ServiceSubTypeCondition;
 use App\Form\Service\Condition\SingleRoomTypeCondition;
@@ -112,15 +112,17 @@ class CreateFieldStateProvider extends AbstractFieldStateProvider
             'static_text' => $firstParticipantReadOnlyCondition,
         ];
 
+        // Every participant needs an email address, children included (BPN 650), so
+        // requiredness is the form type's base option and not a condition here.
         $this->fieldStateConditions['email'] = [
             'static_text' => $firstParticipantReadOnlyCondition,
-            'required' => new RequiresOwnEmailCondition(),
         ];
 
-        // Mobile field: static text for first participant (when read-only), required for first participant (guest bookings)
+        // Mobile field: static text for first participant (when read-only). Mandatory only for the
+        // applicant (guest bookings) — BusPro does not ask a telefonmobil of an ordinary participant.
         $this->fieldStateConditions['mobile'] = [
             'static_text' => $firstParticipantReadOnlyCondition,
-            'required' => new FirstParticipantCondition(),
+            'required' => new FirstParticipantSuppliesApplicantDataCondition(),
         ];
 
         // Address subfields - must render as static text to prevent creating duplicate BPN records
@@ -313,11 +315,11 @@ class CreateFieldStateProvider extends AbstractFieldStateProvider
             'hidden' => FieldValueCondition::equals('parking', false),
         ];
 
-        // Make address field required for first participant (index 0)
-        // Also render as static text for first participant when read-only
+        // Address is mandatory for the applicant only; BusPro accepts an empty anschrift from an
+        // ordinary participant. Also rendered as static text for the applicant when read-only.
         $this->fieldStateConditions['address'] = [
             'static_text' => $firstParticipantReadOnlyCondition,
-            'required' => new FirstParticipantCondition(),
+            'required' => new FirstParticipantSuppliesApplicantDataCondition(),
         ];
 
         // Room assignment field: