feat: enable entering additional remarks in offer confirmation

src/Form/Admin/Groups/AccommodationBookingCreateType.php

@@ -10,9 +10,11 @@ use App\Enum\Groups\AccommodationBookingStatus;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\DateType;
+use Symfony\Component\Form\Extension\Core\Type\EmailType;
 use Symfony\Component\Form\Extension\Core\Type\EnumType;
 use Symfony\Component\Form\Extension\Core\Type\IntegerType;
 use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Form\FormInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
 /**
@@ -57,6 +59,13 @@ class AccommodationBookingCreateType extends AbstractType
                 ],
                 'choice_label' => fn (AccommodationBookingStatus $status) => $status->label(),
             ])
+            // Not marked required in HTML: a draft may be saved without it, and the
+            // validation group below enforces it for everything else.
+            ->add('email', EmailType::class, [
+                'label' => 'E-Mail',
+                'required' => false,
+                'help' => 'Für ein Angebot erforderlich — der Zugangslink und alle Benachrichtigungen gehen an diese Adresse.',
+            ])
         ;
     }
 
@@ -64,6 +73,15 @@ class AccommodationBookingCreateType extends AbstractType
     {
         $resolver->setDefaults([
             'data_class' => AccommodationBooking::class,
+            // A draft is a scratch record, but anything the customer can be pointed at
+            // needs a reachable address — see the `offer` group on the entity. The rest of
+            // the contact data is collected on the edit page, which validates `edit`.
+            'validation_groups' => static function (FormInterface $form): array {
+                /** @var AccommodationBooking $booking */
+                $booking = $form->getData();
+
+                return $booking->isDraft() ? ['Default'] : ['Default', 'offer'];
+            },
         ]);
     }
 }