The application timezone is now only ever set by an admin saving it:
- API: drop adopt_reported_timezone; the panel household clock reads the
stored settings only and ignores any timezone request header.
- Integration: stop reporting Home Assistant's time_zone in an
X-NestQuest-Timezone header (snapshot, completion and SSE requests).
- Admin app: remove the browser-zone detection and the automatic PATCH
on load; the timezone field stays a manual control.
- Remove the timezone_configured marker from the core settings, the
settings store and the admin settings API. A stored document that
still carries the key loads harmlessly (unknown keys are ignored).
Tests replace the adoption expectations with proofs that a panel
timezone header never changes the stored settings, a fresh install's
empty zone stays empty with no settings write, the admin settings carry
no timezone_configured, and a manual admin timezone PATCH persists.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
overseerandClaude Opus 5.5
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