Anthony 96b0cf631a Extract a pure bucket_updates and unit-test the new mail-side code ...

Pull the event-routing decision out of event_handler::apply_batch into a
pure bucket_updates(&[EntityUpdateEvent]) -> Bucketed function so it can
be tested without standing up a MailStore or hitting the network. Six
new tests cover empty batches, foreign apps, unknown type ids, the
MailSetEntry-list de-duplication, mail-event ordering and a mixed batch.

Add four MailStore tests for the new helpers: refresh_mail_in_place
must update the metadata in every folder that holds the mail (Tuta's
model allows multi-folder placement) while preserving the per-folder
UID, and must no-op on an unknown id; remove_mail_everywhere drops from
all folders and no-ops on an unknown id.

Drop the dead `let _ = bus_event_groups;` in bridge.rs and document why
event_groups() is not passed to the bus: the WebSocket subscribes
implicitly via the auth, and the URL's `groupsToLastEventBatchIds=` is
purely a per-group catch-up cursor.

148/148 lib tests pass.

2026-05-28 12:42:03 +02:00

..

bridge

Extract a pure bucket_updates and unit-test the new mail-side code

2026-05-28 12:42:03 +02:00