{# Always-live parent cell: a <select> of candidate parents. Changing
   the value fires PATCH via hx-trigger="change" (save on select), the
   same pattern as the status cell. A <select> does not submit a form
   on Enter, so the earlier Enter-to-save / Escape-to-cancel model never
   worked here; change-to-save is the reliable one. The candidate list
   excludes the page itself and its descendants so a move can never
   create a cycle. #}
<td id="page-parent-cell-{{ page.id }}" role="gridcell">
  <form hx-patch="{{ url_for('page_admin.patch_parent', site_slug=site.slug, page_id=page.id) }}"
        hx-target="#page-parent-cell-{{ page.id }}"
        hx-swap="outerHTML"
        style="margin: 0;">
    <input type="hidden" name="_csrf_token" value="{{ csrf_token() }}">
    <select name="parent_id" hx-trigger="change" hx-include="closest form">
      <option value=""{% if page.parent_id is none %} selected{% endif %}>(root)</option>
      {% for cand in candidates %}
        <option value="{{ cand.id }}"{% if cand.id == page.parent_id %} selected{% endif %}>{{ cand.label }}</option>
      {% endfor %}
    </select>
    {% if error %}<div class="inline-edit-error">{{ error }}</div>{% endif %}
  </form>
</td>