Update backoffice templates to dynamically include titles and improve candidate handling in SeasonController

templates/backoffice/quiz.html.twig

@@ -1,5 +1,7 @@
 {% extends 'backoffice/base.html.twig' %}
 
+{% block title %}{{ parent() }}{{ quiz.season.name }}{% endblock %}
+
 {% block body %}
     <h2 class="py-2">{{ 'Quiz'|trans }}: {{ quiz.season.name }} - {{ quiz.name }}</h2>
     <div class="py-2 btn-group" data-controller="bo--quiz">
@@ -162,5 +164,3 @@
         </div>
     </div>
 {% endblock %}
-{% block title %}
-{% endblock %}