Symptom: wakeTimes schedules silently never fire on non-UTC devices.
Reported live by Matt's EDT frame: wakeTimes=[12:30 PM NY] saved,
12:30 came and went, no rotation. Same bug pattern would fire
*every* poll on east-of-UTC tzs.
Root cause: device_image_history.served_at is `timestamp without time
zone`, written by `new DateTimeImmutable()` so it stores UTC
components ("2026-05-08 16:28:50"). The boundary in isDue() was
bound through Doctrine with the device's local tz still attached,
so Doctrine's format() emitted local-tz components ("12:30:00").
Postgres compared the strings literally — for west-of-UTC tzs the
UTC timestamp is numerically larger than the local-tz boundary, so
every same-day row falsely satisfied `servedAt >= :wakeTime` and
isDue returned false.
Fix: $boundary->setTimezone(UTC) before binding. Both sides now
format in UTC components, so Postgres's literal compare is correct.
Regression test ID-TZ-01: device in America/New_York, wakeTimes
[12:30 PM NY], history at 12:00 PM NY (= 16:00 UTC). With the fix
isDue returns true; without it the test falsely-matches and fails.
Skipped before 13:00 NY since the assertion needs the wake slot to
have already passed today.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Frontend (90.15→95.37 stmts / 91.83→97.01 lines):
- useDeviceMercure: full composable test suite via a fake EventSource —
open/merge/ignore-stale/parse-error/reconnect/dynamic-add/remove/
no-op-when-unconfigured/cleanup-on-unmount.
- HomeView: cover onTimePart's AM/PM and minute branches plus the
nextPollExpectedAt-null fallback paths in the next-update preview.
Backend (no instrumentation before; pcov was already in the image,
just needed a <coverage> block in phpunit.dist.xml):
- RotationService: one test per mode (NewestUpload, Random,
LeastRecentlyShown), one for never-shown sorting first under LRS,
and two for prioritizeNeverShown — narrows when never-shown exists,
falls through to mode otherwise.
- DeviceSerializer: contract test on the wire shape (REST + Mercure
use the same serializer; silent rename here would break live updates
instantly).
- MercurePublisher: topic format + JSON encoding + the swallow-
exceptions guarantee (a flaky hub must not break poll responses).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
football2801