feat(ui): audit, alert rules and the rule form say things in words (#5212)

#5212 "Plain labels: no raw ids, scopes, metric keys or unexplained jargon",
batch 1:

- Audit log: each action reads as a sentence ("paused monitor"), with the
  code as its tooltip. Detail shows flags as yes/no, lists joined, a run's
  scope by name, spans as spans, and no ids the entity column already gives.
  The filter is now a picker of areas.
- Alert rules, history and Status say the condition in words: "is down",
  "Fullest disk >= 85%". Readings use metric_value, and history times use
  |ago.
- Rule form: sources and metrics by name, the threshold's unit, "fires
  when it is down/up" for an up/down metric instead of 0.5, and a metric
  reference built from the catalog.
- Schedules and Maintenance: viewers no longer see Run now, Pause, Edit,
  Delete or New. Intervals and next runs read as "every 2h" and "in 3h";
  a scope reads "Every alert on Host agent".

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

steward/templates/status/rows.html

@@ -25,7 +25,7 @@
     <li>
       {{ status_badge('no_data' if state.no_data_since and state.state.value == 'inactive' else state.state) }}
       <a href="/alerts/history?rule={{ rule.id }}">{{ rule.name }}</a>
-      <span class="problem-detail">{{ rule.resource_name }} · {{ rule.metric_name }} {{ rule.operator.value }} {{ rule.threshold }} · since {{ (state.no_data_since if state.state.value == 'inactive' else state.last_transition_at)|ago }}</span>
+      <span class="problem-detail">{{ rule.resource_name }} {{ rule_condition(rule) }} · since {{ (state.no_data_since if state.state.value == 'inactive' else state.last_transition_at)|ago }}</span>
     </li>
     {% endfor %}
   </ul>