The panel snapshot now carries the admin-saved `timezone` ("" when unset);
the coordinator threads it onto the household due-today sensor, and the
Party Board and Quest Log cards format their kicker, header and dock
date and clock in it, falling back to Home Assistant's zone only when
none is stored. The admin app loads the stored zone once
(AppTimezoneProvider) and uses it for completion clocks, History day
grouping, clocks and lateness, and "today" in Schedule, History and new
task defaults; Settings publishes a saved zone app-wide at once.
Resolves review finding TZ-001 (task 7e173881).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The completed event's was_on_time travels on the CompletionResult
(decided with the write) instead of re-reading latest state a racing
reversal could replace; unload clears coordinator listeners before
the database close.
The harness tracks entities per entry so a platform unload removes
exactly that entry's entities; lifecycle tests prove deactivated
children drop out on reload, reactivation restores the original
unique_ids, new children appear without disturbing existing ones,
and the restart equivalent restores live states.