wip: additional services with constraints

src/Form/Service/Condition/ApplicantCondition.php

@@ -30,7 +30,7 @@ class ApplicantCondition implements FieldConditionInterface
     public function evaluate(BookingDtoInterface $bookingDto, int $participantIndex, array $formData): bool
     {
         // Default: applicant is the first participant (index 0)
-        return $participantIndex === 0;
+        return 0 === $participantIndex;
     }
 
     public function getDependentFields(): array
@@ -42,4 +42,4 @@ class ApplicantCondition implements FieldConditionInterface
     {
         return 'Checks if the participant is the applicant (index 0)';
     }
-}
+}