#5210 "Problems first, with since-time, across every list" (milestone 477), first batch. - Alerts: the Active list reads firing, no data, acknowledged, pending, the longest-running first, and re-polls itself. An acknowledged alert says how long it has been breaching (from the alert's events; acknowledging moves last_transition_at) and, apart from that, who acknowledged it and when. Rules show what each is doing now; disabled rules sort last. The current value reads the latest-value table (#5208) instead of plugin_metrics. - Monitors: a down monitor says "Down 12m · connection refused" in the list. - Hosts: sorted down, agent gone quiet, pending, healthy. The agent column shows "—" for a missing reading (was 0%) and a Stale badge with its age. agent_metrics_by_host is gone; the list reads agent_overview_by_host. - Schedules: failing first (failed or interrupted run, or a firing that could not start one), then running, then the rest, paused last; status badge from the shared states. - Maintenance windows: active (ending soonest), then upcoming (starting soonest), with expired folded away; each says when it ends/starts/ended. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>