feat: address PR review comments — unassign/sync bank questions, blank quiz creation, deactivate redirect, remove duplicate tab titles

- Use Symfony ObjectMapper for BankQuestion/BankAnswer → Question/Answer copy (#[Map(if: false)] on id, season, etc.)
- Track created Question on BankQuestionUsage (nullable FK, onDelete: SET NULL) for unassign/sync support
- Add unassign route: removes the Question copy + usage record
- Add sync route: pushes bank question edits to a finalized-not-started quiz copy
- Auto-sync non-finalized quiz copies on bank question edit; flash warning for finalized-not-started
- Add blank quiz creation (no XLSX required) with new route + template
- Deactivate quiz button now stays on the quiz overview page (redirect_quiz hidden field)
- Remove duplicate h4 titles below the tab bar on all season tabs
- Add migration for bank_question_usage.question_id
- Add Dutch translations for all new strings

templates/backoffice/quiz/tab_overview.html.twig

@@ -38,6 +38,7 @@
         {% if quiz is same as (season.activeQuiz) %}
             <form action="{{ path('tvdt_backoffice_enable', {seasonCode: season.seasonCode, quiz: 'null'}) }}" method="POST">
                 <input type="hidden" name="_token" value="{{ csrf_token('enable_quiz') }}">
+                <input type="hidden" name="redirect_quiz" value="{{ quiz.id }}">
                 <button type="submit" class="btn btn-secondary rounded-0 rounded-start">
                     {{ 'Deactivate Quiz'|trans }}
                 </button>

templates/backoffice/quiz_add_blank.html.twig

@@ -0,0 +1,28 @@
+{% extends 'backoffice/base.html.twig' %}
+
+{% block breadcrumbs %}
+    <nav aria-label="breadcrumb" class="mb-3">
+        <ol class="breadcrumb">
+            <li class="breadcrumb-item"><a href="{{ path('tvdt_backoffice_index') }}">{{ 'Home'|trans }}</a></li>
+            <li class="breadcrumb-item"><a href="{{ path('tvdt_backoffice_season', {seasonCode: season.seasonCode}) }}">{{ season.name }}</a></li>
+            <li class="breadcrumb-item active" aria-current="page">{{ 'Add blank quiz'|trans }}</li>
+        </ol>
+    </nav>
+{% endblock %}
+
+{% block body %}
+    <div class="row">
+        <div class="col-md-6 col-12">
+            <h2 class="mb-3">{{ t('Add a quiz to {name}', {name: season.name})|trans }}</h2>
+            {{ form_start(form) }}
+            {{ form_row(form.name) }}
+            {{ form_widget(form.save, {attr: {class: 'btn btn-primary'}}) }}
+            {{ form_end(form) }}
+        </div>
+        <div class="col-md-6 col-12">
+            <p class="mb-3">{{ 'Create an empty quiz and add questions from the question bank.'|trans }}</p>
+        </div>
+    </div>
+{% endblock %}
+
+{% block title %}{{ parent() }}Backoffice{% endblock %}

templates/backoffice/season/tab_candidates.html.twig

@@ -1,10 +1,8 @@
 <div class="row">
     <div class="col-md-6 col-12">
-        <div class="d-flex align-items-center mb-3">
-            <h4 class="mb-0 pe-2">{{ 'Candidates'|trans }}</h4>
-            <a class="link"
-               href="{{ path('tvdt_backoffice_add_candidates', {seasonCode: season.seasonCode}) }}">{{ 'Add Candidate'|trans }}
-            </a>
+        <div class="mb-3">
+            <a class="btn btn-sm btn-outline-primary"
+               href="{{ path('tvdt_backoffice_add_candidates', {seasonCode: season.seasonCode}) }}">{{ 'Add Candidate'|trans }}</a>
         </div>
         <ul class="mb-3">
             {% for candidate in season.candidates %}

templates/backoffice/season/tab_question_bank.html.twig

@@ -1,6 +1,5 @@
-<div class="d-flex align-items-center mb-3">
-    <h4 class="mb-0 pe-2">{{ 'Question bank'|trans }}</h4>
-    <a class="link" href="{{ path('tvdt_backoffice_question_bank_new', {seasonCode: season.seasonCode}) }}">{{ 'Add'|trans }}</a>
+<div class="mb-3">
+    <a class="btn btn-sm btn-outline-primary" href="{{ path('tvdt_backoffice_question_bank_new', {seasonCode: season.seasonCode}) }}">{{ 'Add question'|trans }}</a>
 </div>
 
     <div class="d-flex align-items-center flex-wrap gap-2 mb-3">
@@ -51,7 +50,23 @@
                     {% endif %}
                 </td>
                 <td>
-                    {{ bankQuestion.usages|map(usage => usage.quiz.name)|join(', ') }}
+                    {% for usage in bankQuestion.usages %}
+                        <div class="d-flex align-items-center gap-1">
+                            <span>{{ usage.quiz.name }}</span>
+                            <form action="{{ path('tvdt_backoffice_question_bank_unassign', {seasonCode: season.seasonCode, bankQuestion: bankQuestion.id, usage: usage.id}) }}"
+                                  method="POST" class="d-inline">
+                                <input type="hidden" name="_token" value="{{ csrf_token('unassign_bank_question') }}">
+                                <button type="submit" class="btn btn-sm btn-link p-0 text-danger" title="{{ 'Unassign'|trans }}">&times;</button>
+                            </form>
+                            {% if usage.quiz.isFinalized %}
+                                <form action="{{ path('tvdt_backoffice_question_bank_sync', {seasonCode: season.seasonCode, bankQuestion: bankQuestion.id, usage: usage.id}) }}"
+                                      method="POST" class="d-inline">
+                                    <input type="hidden" name="_token" value="{{ csrf_token('sync_bank_question') }}">
+                                    <button type="submit" class="btn btn-sm btn-link p-0 text-primary" title="{{ 'Sync latest changes to this quiz'|trans }}">&#8635;</button>
+                                </form>
+                            {% endif %}
+                        </div>
+                    {% endfor %}
                 </td>
                 <td class="text-end">
                     <div class="d-inline-flex align-items-center gap-2">

templates/backoffice/season/tab_settings.html.twig

@@ -1,6 +1,5 @@
 <div class="row">
     <div class="col-md-6 col-12">
-        <h4 class="mb-3">{{ 'Settings'|trans }}</h4>
         {{ form(form) }}
     </div>
 </div>

templates/backoffice/season/tab_tests.html.twig

@@ -1,9 +1,10 @@
 <div class="row">
     <div class="col-md-6 col-12">
-        <div class="d-flex align-items-center mb-3">
-            <h4 class="mb-0 pe-2">{{ 'Quizzes'|trans }}</h4>
-            <a class="link"
-               href="{{ path('tvdt_backoffice_quiz_add', {seasonCode: season.seasonCode}) }}">{{ 'Add'|trans }}</a>
+        <div class="d-flex align-items-center gap-2 mb-3">
+            <a class="btn btn-sm btn-outline-primary"
+               href="{{ path('tvdt_backoffice_quiz_add', {seasonCode: season.seasonCode}) }}">{{ 'Add from XLSX'|trans }}</a>
+            <a class="btn btn-sm btn-outline-secondary"
+               href="{{ path('tvdt_backoffice_quiz_add_blank', {seasonCode: season.seasonCode}) }}">{{ 'Add blank'|trans }}</a>
         </div>
         <div class="list-group mb-3">
             {% for quiz in season.quizzes %}