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/inventory/group_detail.html

@@ -6,9 +6,9 @@
 {% from "ansible/_tabs.html" import ansible_tabs %}
 {% block title %}{{ group.name }} — Inventory — Steward{% endblock %}
 {% block breadcrumb %}{{ crumbs([("Ansible", "/ansible/"), ("Inventory", "/ansible/inventory/"), (group.name, "")]) }}{% endblock %}
+{% block section_tabs %}{{ ansible_tabs("inventory") }}{% endblock %}
 {% block content %}
 {% set can_edit = session.user_role in ('operator', 'admin') %}
-{{ ansible_tabs("inventory") }}
 {{ page_header(group.name) }}
 {#- The name a play uses for it (#5334): Ansible takes only letters, digits and _. #}
 

steward/templates/ansible/inventory/index.html

@@ -8,9 +8,9 @@
 {% from "ansible/_tabs.html" import ansible_tabs %}
 {% block title %}Ansible Inventory — Steward{% endblock %}
 {% block breadcrumb %}{{ crumbs([("Ansible", "/ansible/"), ("Inventory", "")]) }}{% endblock %}
+{% block section_tabs %}{{ ansible_tabs("inventory") }}{% endblock %}
 {% block content %}
 {% set can_edit = session.user_role in ('operator', 'admin') %}
-{{ ansible_tabs("inventory") }}
 {% call page_header("Inventory") %}
     {% if can_edit %}
     <button type="button" class="btn btn-ghost" onclick="document.getElementById('add-group').showModal()">Add group</button>

steward/templates/ansible/inventory/target_detail.html

@@ -7,9 +7,9 @@
 {% from "ansible/_tabs.html" import ansible_tabs %}
 {% block title %}{{ target.name }} — Inventory — Steward{% endblock %}
 {% block breadcrumb %}{{ crumbs([("Ansible", "/ansible/"), ("Inventory", "/ansible/inventory/"), (target.name, "")]) }}{% endblock %}
+{% block section_tabs %}{{ ansible_tabs("inventory") }}{% endblock %}
 {% block content %}
 {% set can_edit = session.user_role in ('operator', 'admin') %}
-{{ ansible_tabs("inventory") }}
 {{ page_header(target.name) }}
 
 <p class="page-verdict">