fix(ui): section tabs above the breadcrumb, so the Ansible tab strip holds still (#5214)

The tabs were drawn in each page's content block, which base.html renders
after the breadcrumb, so on every nested Ansible page the strip moved down a
line. base.html now has a section_tabs block above the breadcrumb, and every
Ansible page fills it. A guard in test_breadcrumbs.py fails any page that calls
a tabs macro outside that block.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

steward/templates/ansible/run_detail.html

@@ -9,8 +9,8 @@
 {% macro words(parts) -%}
 {% for text, tone in parts %}{% if not loop.first %} · {% endif %}{% if tone %}<span class="tone-{{ tone }}">{{ text }}</span>{% else %}{{ text }}{% endif %}{% endfor %}
 {%- endmacro %}
+{% block section_tabs %}{{ ansible_tabs("runs") }}{% endblock %}
 {% block content %}
-{{ ansible_tabs("runs") }}
 {% call page_header(row.title) %}
     {% if run.status.value in ("running", "queued") and session.user_role in ("operator", "admin") %}
     <form method="post" action="/ansible/runs/{{ run.id }}/cancel" data-confirm="Cancel this run? Ansible stops where it is; tasks already applied stay applied." data-confirm-dismiss="Keep running">{{ csrf_field() }}