<nav class="tabs">
  <a href="/frames/{{ frame.id }}" class="{% if active_tab == 'layout' %}active{% endif %}">Layout</a>
  <a href="/frames/{{ frame.id }}/config" class="{% if active_tab == 'config' %}active{% endif %}">Configuration</a>
  <a href="/frames/{{ frame.id }}/stats" class="{% if active_tab == 'stats' %}active{% endif %}">Stats</a>
</nav>
