{% comment %}
Renders form-level (non-field) errors as an accessible alert block.

Required:
  form — a bound Django form whose non_field_errors() may be non-empty.

Usage:
  {% include "components/forms/non_field_errors.html" with form=form %}
{% endcomment %}
{% if form.non_field_errors %}
<div class="rounded-lg border border-red-200 bg-red-50 px-4 py-3 text-sm text-red-800" role="alert" aria-live="polite">
  {% if form.non_field_errors|length == 1 %}
    <p class="m-0">{{ form.non_field_errors.0 }}</p>
  {% else %}
    <ul class="m-0 list-disc space-y-1 pl-5">
      {% for err in form.non_field_errors %}<li>{{ err }}</li>{% endfor %}
    </ul>
  {% endif %}
</div>
{% endif %}