{% comment %}
Stat band (04-interfaces.md section 4d): a display-scale metric band.
Structural, consumed via {% include %} (BR-BW-MKT §4d structural-include
doctrine). Composes _stat.html's tile shape per BR-BW-MKT-004 (a marketing
component reuses an existing primitive rather than reimplementing it),
laid out here as a display-scale band rather than the dashboard KPI row
patterns/dashboard.html's bw-stat-grid uses.

Required context: none.

Optional context:
  heading (str): the section heading.
  stats   (list of dicts): {value, label, trend?, trend_label?}. Each is
          passed straight through to _stat.html, so the standing VIZ-002 /
          BR-BW-TPL-007 rule holds unchanged here: a trend without a
          trend_label is a template-authoring defect in the same class as
          bw_button's icon-only/aria_label pairing (_stat.html enforces
          this at its own render, not duplicated here).

An empty (or omitted) stats list renders the heading alone (or nothing, if
that too is empty).
{% endcomment %}
{% if heading or stats %}
<section class="bw-stat-band-section">
  {% if heading %}<h2 class="bw-stat-band-section__heading">{{ heading }}</h2>{% endif %}
  {% if stats %}
    <div class="bw-stat-band">
      {% for stat in stats %}
        {% include "brickwork/components/_stat.html" with label=stat.label value=stat.value trend=stat.trend trend_label=stat.trend_label size="lg" %}
      {% endfor %}
    </div>
  {% endif %}
</section>
{% endif %}