feat: answer field UX improvements

- Auto-add one empty answer field when opening a blank question form
- Auto-append new empty field when typing in the last answer field
- Strip empty answer rows before submit (novalidate + JS cleanup)
- Tab key skips correct/delete buttons, jumping straight to next answer

assets/controllers/bo/form_collection_controller.js

@@ -8,6 +8,29 @@ export default class extends Controller {
     this.index = this.collectionTarget.children.length;
     this._setupDrag();
     this._syncOrdering();
+
+    if (this.index === 0) {
+      this.addItem();
+    }
+
+    this.collectionTarget.addEventListener('input', (e) => {
+      if (e.target.type !== 'text') return;
+      const item = e.target.closest('[data-collection-item]');
+      const last = [...this.collectionTarget.children].at(-1);
+      if (item && item === last && e.target.value.trim() !== '') {
+        this.addItem();
+      }
+    });
+
+    const form = this.element.closest('form');
+    if (form) {
+      form.addEventListener('submit', () => {
+        [...this.collectionTarget.children].forEach(item => {
+          const input = item.querySelector('input[type="text"]');
+          if (input && input.value.trim() === '') item.remove();
+        });
+      });
+    }
   }
 
   addItem() {

templates/backoffice/partials/answer_row.html.twig

@@ -4,13 +4,13 @@
         <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"
+        <button type="button" tabindex="-1"
                 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'">
             <i class="{{ answerForm.isRightAnswer.vars.checked ? 'bi bi-check-lg' : 'bi bi-x-lg' }}"></i>
         </button>
-        <button type="button" class="btn btn-sm btn-outline-danger"
+        <button type="button" tabindex="-1" class="btn btn-sm btn-outline-danger"
                 data-action="bo--form-collection#removeItem"><i class="bi bi-trash"></i></button>
     </div>
 {% endmacro %}

templates/backoffice/question_bank/_form_body.html.twig

@@ -1,6 +1,6 @@
 {% import 'backoffice/partials/answer_row.html.twig' as macros %}
 
-{{ form_start(form) }}
+{{ form_start(form, {attr: {novalidate: 'novalidate'}}) }}
 {{ form_row(form.question) }}
 {{ form_row(form.reusable) }}
 {{ form_row(form.labels) }}

templates/backoffice/quiz/_question_form_body.html.twig

@@ -1,6 +1,6 @@
 {% import 'backoffice/partials/answer_row.html.twig' as macros %}
 
-{{ form_start(form) }}
+{{ form_start(form, {attr: {novalidate: 'novalidate'}}) }}
 {{ form_row(form.question) }}
 
 <div data-controller="bo--form-collection"

templates/backoffice/quiz/tab_overview.html.twig

@@ -73,10 +73,10 @@
                 </button>
             </form>
         {% endif %}
-        <button class="btn btn-danger" data-action="click->bo--quiz#clearQuiz">
+        <button class="btn btn-danger rounded-0" data-action="click->bo--quiz#clearQuiz">
             {{ 'Clear Quiz...'|trans }}
         </button>
-        <button class="btn btn-danger rounded-0 " data-action="click->bo--quiz#deleteQuiz">
+        <button class="btn btn-danger rounded-0" data-action="click->bo--quiz#deleteQuiz">
             {{ 'Delete Quiz...'|trans }}
         </button>
         <a class="btn btn-secondary rounded-0 rounded-end"