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>

tests/core/test_ansible_playbooks_page.py

@@ -83,7 +83,7 @@ async def test_a_playbook_page_runs_it_and_shows_its_history(app):
         session["user_role"] = "operator"
         page = await render_template("ansible/playbook.html", **_page_ctx(schedules=[
             {"s": sched, "scope_label": "group Docker Swarm",
-             "next": {"name": "Nightly prune", "at": now + timedelta(hours=2)}}]))
+             "next": {"id": "s1", "name": "Nightly prune", "at": now + timedelta(hours=2)}}]))
     main = page[page.index("<main"):]
     assert 'href="/ansible/playbooks"' in page                           # crumbs back to the list
     verdict = main[main.index('<p class="page-verdict">'):]
@@ -93,7 +93,8 @@ async def test_a_playbook_page_runs_it_and_shows_its_history(app):
     assert 'name="confirmed"' in main                                   # the destructive flag's gate
     assert 'name="var__prune_volumes"' in main and 'name="check"' in main
     assert "Nightly prune" in main and "on group Docker Swarm · daily" in main
-    assert 'href="/ansible/schedules?edit=s1#form"' in main
+    assert 'href="/ansible/schedules/s1"' in main
+    assert 'href="/ansible/schedules/new?source=steward-builtin&amp;playbook=maintenance/prune.yml"' in main
     assert 'href="/ansible/runs/r9"' in main and "End of the list." not in main
     assert 'href="/ansible/?q=maintenance/prune.yml"' in main
     assert "/ansible/playbooks/edit/" not in main                       # a built-in playbook is read-only