{% comment %}
Always h1.h3, so pages cannot drift apart. Heading rank is structural; size is
fixed. Never pick a heading level for its size.

    {% trans "Widgets" as parent %}{% url 'public:widget-list' as parent_url %}
    {% include "yksa/ui/_page_title.html" with title=widget.name parent=parent parent_url=parent_url %}

Put it inside the page header's flex row; the row owns the actions on the right.
{% endcomment %}
<h1 class="h3 mb-0">
    {% if parent %}<a class="text-decoration-none" href="{{ parent_url }}">{{ parent }}</a> / {% endif %}{{ title }}
</h1>
{% if subtitle %}<span class="text-body-secondary small">{{ subtitle }}</span>{% endif %}