{% macro sort_th(key, label, sort_headers) %}
  {% if sort_headers and key in sort_headers %}
    {% set h = sort_headers[key] %}
    <th>
      <a href="#" class="sort-link{{ ' active' if h.active else '' }}"
         hx-get="{{ h.url }}"
         hx-target="{{ h.target_id }}"
         hx-swap="outerHTML">{{ label }}{% if h.active %}<span aria-hidden="true">{{ ' ▲' if h.dir == 'asc' else ' ▼' }}</span>{% endif %}</a>
    </th>
  {% else %}
    <th>{{ label }}</th>
  {% endif %}
{% endmacro %}