launchd exposes no last-trigger either (systemd-only) — fill it from the
run log mtime (MM-DD HH:MM); merged unscheduled/disabled rows now carry
their parse_last_log too, so only genuinely never-run sources show
从未触发 (verified: 10 ran-today sources show real times, 4 never-run
reuters sources remain 从未触发).