feat(ansible): schedules read as sentences, each with its own page (#5332)

- The Schedules tab: a verdict line (failing first, paused, next due),
  each schedule as one line (what runs where, how often, when next, how it
  last went); the row opens its page; Run now and Pause stay in the row.
- /ansible/schedules/new and /ansible/schedules/<id>: the form on classes,
  dry run beside the button, the playbook's variables rendered with the
  page; at the foot Delete behind the confirm dialog. ?source=&playbook=
  start a new one on a playbook (Schedule it on the playbook's page).
- A run started by a schedule links to that schedule's page.
- The run page's id guard allows the Run again link's ?from=.

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

steward/templates/ansible/index.html

@@ -18,7 +18,7 @@
     {%- if v.latest_failed %} — latest <a href="/ansible/runs/{{ v.latest_failed.run.id }}">{{ v.latest_failed.title }}</a> {{ v.latest_failed.run.started_at|ago }}{% endif %}
   {%- else %}<span class="tone-ok">{{ v.total }} run{{ 's' if v.total != 1 }} in the last {{ v.days }} days, {{ 'all' if v.total > 1 else 'it' }} succeeded</span>{% endif %}
   {%- if v.running %} · <span class="tone-info">{{ v.running }} running now</span>{% endif %}
-  {%- if v.next %} · next: <a href="/ansible/schedules">{{ v.next.name }}</a> {% if v.next.at %}{{ v.next.at|ago }}{% else %}due now{% endif %}{% endif -%}
+  {%- if v.next %} · next: <a href="/ansible/schedules/{{ v.next.id }}">{{ v.next.name }}</a> {% if v.next.at %}{{ v.next.at|ago }}{% else %}due now{% endif %}{% endif -%}
 </p>
 
 <form class="filter-bar" method="get" action="/ansible/" role="search"