Reproduced on main 9179178fdf: the retry notice rendered the reset time in the viewer's local format with no zone, so it did not match Claude's zone-labelled reset message when the viewer sits in a different timezone than the host.
Fix in #23029: the notice now appends the viewer's IANA timezone on web, desktop and mobile, keeping each client's existing time format. A regression test covers changing the device timezone while the app stays open. The timestamp already crosses the wire as an ISO instant, so no server or contract change.