feat: unique email addresses of participants unless child, cleanup

addresses #869axbn21

templates/booking/edit/index.html.twig

@@ -2,7 +2,6 @@
 
 {% block content %}
     {% include '_partials/_flashes.html.twig' %}
-    <div {{ stimulus_controller('toast') }}></div>
 
     {# Header with reload button #}
     <div class="flex justify-between items-center pb-8">
@@ -62,12 +61,14 @@
                     {% for participant in bookingDto.participants %}
                         {% set isCanceled = (bookingData.participantsStatus[loop.index0] ?? null) == 'S' %}
                         {% set hasErrors = loop.index0 in participantErrors|default([]) %}
+                        {% set errorMessages = participantErrorMessages[loop.index0]|default([]) %}
                         {% include 'booking/_participant_card.html.twig' with {
                             'cardData': cardsData[loop.index0],
                             'index': loop.index0,
                             'mode': 'edit',
                             'isCanceled': isCanceled,
                             'hasErrors': hasErrors,
+                            'errorMessages': errorMessages,
                             'bookingId': bookingData.id
                         } %}
                     {% endfor %}