#5066 "Alert history page". /alerts/history lists every alert transition in a range (1h–30d, the shared range picker), newest first, all rules or one (?rule=). Each row: from → to, the value against the rule's condition ("no data" for a silent one), email and webhook sent or failed with the error, "muted · <window>" (and "notified when the window ended") taken out of the event note, other notes, and a link to the Ansible run an action started. Range and rule changes swap only the rows (HTMX). Viewer role. The Alerts page links each rule's history and the whole history. The query moves to alert_svc.history, which MCP get_alert_history now uses too. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>