feat(alerts): Steward's own confirm dialog, a verdict-first rules list, and a rule page in three sections (#5314, #5315, #5317)

Confirm dialog (#5314):
- Every data-confirm form now asks in one native <dialog> (base.html + static/confirm.js)
  instead of window.confirm.
- The question becomes the heading and what follows it the detail; the act's
  button is named after the form's own button; Cancel has the focus and Esc
  backs out. Optional data-confirm-title/-detail/-action/-dismiss attributes.
- All 27 existing uses work as they are. Cancelling a run says 'Keep running'.

Alerts list (#5315):
- A verdict line (what is firing, how many rules, where notifications go,
  or 'notifies nobody yet' with a link) replaces the empty Active card.
- Each rule's name opens it; rows show 'last fired' and fold fire/clear into
  the condition; History and Disable stay; Delete leaves the list.
- .docker-verdict becomes the shared .page-verdict.

Rule page (#5317):
- Named for the rule (title and crumb), with when it last fired and how many
  changes of state it holds.
- Three sections: what it watches, when it fires (checks side by side,
  seconds echoed as a duration), what happens (where notifications go, no-data,
  the playbook, whose fields stay folded until ticked).
- Delete at the foot, behind the dialog, saying its history goes with it.

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

steward/templates/ansible/run_detail.html

@@ -5,7 +5,7 @@
 {% block content %}
 {% call page_header(row.title, "From the " ~ run.source_name ~ " playbook source") %}
     {% 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?">{{ csrf_field() }}
+    <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() }}
         <button type="submit" class="btn btn-sm btn-danger">Cancel run</button>
     </form>
     {% endif %}