chore: fix phpstan errors

src/Form/Service/Contract/FieldOptionsProviderInterface.php

@@ -41,10 +41,10 @@ interface FieldOptionsProviderInterface
      * used when building the form field. These options are merged with any
      * static options defined in the form type.
      *
-     * @param string     $fieldName        The name of the field to configure
-     * @param BookingDto $bookingDto       The current booking data for context (create or edit)
-     * @param int        $participantIndex The index of the participant being configured
-     * @param array      $options          Additional options to customize field behavior
+     * @param string               $fieldName        The name of the field to configure
+     * @param BookingDto           $bookingDto       The current booking data for context (create or edit)
+     * @param int                  $participantIndex The index of the participant being configured
+     * @param array<string, mixed> $options          Additional options to customize field behavior
      *
      * @return array<string, mixed> Symfony form field options, or empty array if field not supported
      */

src/Form/Service/Contract/FieldStateProviderInterface.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Form\Service\Contract;
 
 use App\Form\Model\BookingDto;
+use Symfony\Component\Form\FormInterface;
 
 /**
  * Interface for providing dynamic field state based on conditions.
@@ -30,6 +31,15 @@ use App\Form\Model\BookingDto;
  */
 interface FieldStateProviderInterface
 {
+    /**
+     * Gets the BookingDto from the root of the form tree.
+     *
+     * @param FormInterface<mixed> $form The form to start traversing from
+     *
+     * @return BookingDto|null The booking DTO or null if not found
+     */
+    public function getBookingDtoFromForm(FormInterface $form): ?BookingDto;
+
     /**
      * Determines whether a field should be included in the form at all.
      *