The deployed API host runs UTC and the household `timezone` setting was
never set, so the panel snapshot read UTC: morning quests showed overdue
hours early and `today_iso` rolled over at UTC midnight.
The integration now reports `hass.config.time_zone` on every panel
request (`X-NestQuest-Timezone`). While the admin has not chosen a zone
(`timezone_configured` is false) the API adopts and persists it, so the
panel, the admin plane, and the missed-sweep scheduler all read the
household clock out of the box. An explicit admin choice — including an
explicitly chosen empty zone — still wins; an invalid reported zone is
logged and ignored. No schema change.
Task: 6351b36d-0eef-4e7d-bf5a-96b754cbc883
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>