/settings/household edits the time zone (a searchable IANA list with each zone's current UTC offset), dinner time, day-of reminder, rotation check, and the plan draft, new suggestions and Google Chat Supply run day and time, with plain-word copy for each and "Changes apply to everyone in the household." Save PATCHes only the changed fields; the API's invalid_settings problems show under their fields. The leave guard and confirm sheet move out of the AI settings page so both screens share them. Maestro task 48f8b8c3-7d5c-415d-9a61-980dc065bb90. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>