fix: address CodeRabbit review findings on PR #183

- Add SeasonVoter::EDIT guard to QuizQuestionController::view()
- Add full-count check in reorder() to reject partial ordering payloads
- Retry once in _persistOrder(); lock drag and show dismissible alert on failure
- Remove tabindex="-1" from correct-answer toggle button (accessibility)
- Replace 'EMPTY'|trans placeholder with proper copy
- Add data-modal-title to question bank Edit button to prevent stale title

templates/backoffice/partials/answer_row.html.twig

@@ -4,7 +4,7 @@
         <span class="text-muted" data-drag-handle style="cursor: grab" title="{{ 'Drag to reorder'|trans }}"><i class="bi bi-grip-vertical"></i></span>
         <div class="flex-grow-1">{{ form_widget(answerForm.text) }}</div>
         <div class="d-none">{{ form_widget(answerForm.isRightAnswer) }}</div>
-        <button type="button" tabindex="-1"
+        <button type="button"
                 class="btn btn-sm {{ answerForm.isRightAnswer.vars.checked ? 'btn-success' : 'btn-danger' }}"
                 title="{{ 'Toggle correct answer'|trans }}"
                 onclick="var cb=this.closest('[data-collection-item]').querySelector('input[type=checkbox]');cb.checked=!cb.checked;this.classList.toggle('btn-success',cb.checked);this.classList.toggle('btn-danger',!cb.checked);this.querySelector('i').className=cb.checked?'bi bi-check-lg':'bi bi-x-lg'">