A session deleted in the sidebar disappeared optimistically but flashed
back when any list fetch raced the in-flight DELETE RPC — the backend
page still carried the doomed row until the transaction committed
(#50928, reproduced with 'Load more' and auto-refresh). The optimistic
tombstone ($removedSessionIds) was only honored by the recents slice of
refreshSessions; the messaging slice, the per-platform pager, and
refreshMessagingSessions ingested backend pages unfiltered.
Extract the tombstone filter into dropTombstoned() and apply it at every
session-list ingestion point. Tombstones only exist while a delete or
archive is in flight (they self-clear on confirmation and are removed
immediately on failure), so non-destructive refresh paths are untouched.
Fixes#50928
Teknium
1025cb0e66