- new /schedules 调度中心: per-source row with a 24h timeline (green dots
  at fire times, next fire highlighted amber, red now-line), 定时/下次触发
  (countdown)/上次运行 columns, sorted by next fire, 60s auto-refresh
- create/update: POST /schedule-time (HH:MM list, validated) →
  nh_schedule_write + enable (+skill enable for new rows)
- delete: POST /schedule-delete/<name> → new platform.sh nh_schedule_remove
  (bootout + rm plist incl. disabled + entry script + per-source conf;
  skill source and history kept; digest/web protected)
- guards: active harvests block time changes/deletes
- nav link 调度中心; schedule_times() string parsed to list