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/audit/routes.py

@@ -2,7 +2,8 @@ from __future__ import annotations
 import json
 from quart import Blueprint, render_template, request, current_app
 from sqlalchemy import select
-from steward.audit.service import entity_labels
+from steward.ansible.inventory_gen import scope_labels
+from steward.audit.service import AREAS, action_text, detail_facts, entity_labels
 from steward.auth.middleware import require_role
 from steward.core.paging import keyset, next_page
 from steward.models.audit import AuditEvent
@@ -36,12 +37,16 @@ async def list_events():
                     detail = {"raw": e.detail_json}
             parsed.append({"event": e, "detail": detail})
         labels = await entity_labels(db, parsed)
+        scopes = await scope_labels(db, [p["detail"].get("scope") for p in parsed
+                                         if isinstance(p["detail"].get("scope"), str)])
 
     for item in parsed:
         e = item["event"]
         item["entity"] = labels.get((e.entity_type, str(e.entity_id))) if e.entity_id else None
+        item["action"] = action_text(e.action)
+        item["facts"] = detail_facts(item["detail"], scopes)
 
-    ctx = {"events": parsed, "after": after, "action_filter": action_filter}
+    ctx = {"events": parsed, "after": after, "action_filter": action_filter, "areas": AREAS}
     if request.args.get("before"):
         return await render_template("audit/_rows.html", **ctx)
     return await render_template("audit/list.html", **ctx)