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_viewer_actions.py

@@ -32,12 +32,14 @@ async def test_maintenance_offers_changes_only_to_those_who_can_make_them(app):
 
 async def test_schedules_show_a_viewer_the_list_without_its_controls(app):
     s = NS(id="s1", name="nightly", enabled=True, source_name="local", playbook_path="prune.yml",
-           inventory_scope="steward:all", interval_seconds=7200, last_error=None, last_run_at=None)
-    rows = [{"s": s, "last_run": None, "next_run": NOW + timedelta(hours=2), "scope_label": "all inventory targets"}]
+           inventory_scope="steward:all", interval_seconds=7200, last_error=None, last_run_at=None, params=None)
+    nxt = {"id": "s1", "name": "nightly", "at": NOW + timedelta(hours=2)}
+    rows = [{"s": s, "last_run": None, "next": nxt, "scope_label": "all inventory targets"}]
     async with app.test_request_context("/ansible/schedules"):
         session["user_role"] = "viewer"
-        page = await render_template("ansible/schedules.html", rows=rows, editing=None)
+        page = await render_template("ansible/schedules.html", rows=rows, next=nxt, failing=0, paused=0)
     assert "nightly" in page and "every 2h" in page and "7200s" not in page
     assert ">in 2h</time>" in page or ">in 1h 59m</time>" in page
-    for control in ("Run now", "Pause", "?edit=", "/delete", "New schedule"):
+    assert 'class="row-target" href="/ansible/schedules/s1"' in page     # the row opens the schedule
+    for control in ("Run now", "Pause", "/delete", "New schedule"):
         assert control not in page, control