{#
  Page head: title 22/600, optional 14px muted description, actions on the right.
  `breadcrumbs` is a list of {"label": ..., "href": ...}; the last entry is the current page.
  It is rendered into a <template> so the shell topbar can mirror it after a Turbo frame swap.
#}
{% macro page_head(title, description=none, breadcrumbs=(), title_tag="h1") %}
  {% if breadcrumbs %}
    <template data-om-breadcrumb>
      <ol class="oldman-breadcrumb">
        {% for crumb in breadcrumbs %}
          <li>
            {% if crumb.href and not loop.last %}
              <a href="{{ crumb.href }}">{{ crumb.label }}</a>
            {% else %}
              <span aria-current="page">{{ crumb.label }}</span>
            {% endif %}
          </li>
        {% endfor %}
      </ol>
    </template>
  {% endif %}
  <div class="om-page-header">
    <div class="om-page-heading-text">
      <{{ title_tag }} class="om-page-title">{{ title }}</{{ title_tag }}>
      {% if description %}
        <p class="om-page-description">{{ description }}</p>
      {% endif %}
    </div>
    {% if caller %}
      <div class="om-page-actions">{{ caller() }}</div>
    {% endif %}
  </div>
{% endmacro %}