feat(web): scheduled jobs board (/console/schedules)

- cards grouped by collect / download / organize / maintain / agent checks: switch,
  in-place interval or cron edit, last result and duration, next-run countdown,
  failure reason, run now, skip next, reset to default, history drawer
- top stats (enabled / failed / running / total) and a scheduler-offline notice;
  refreshed by the schedule.changed SSE event with a 30s fallback
- agent check cards show goal template, trigger, budget and allowlist size; create /
  edit dialog (read-only capabilities, budget, trigger, interval, report to inbox)
- nav entry in the system group, route and smoke route

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/scripts/smoke.mjs

@@ -38,6 +38,7 @@ const STATIC_ROUTES = [
   "/console/agent?mock=1",
   "/console/engine",
   "/console/audit",
+  "/console/schedules",
   "/console/settings",
   "/console/settings?tab=pi",
 ];