A conflict replay collapsed every step into one edit, so a closed tab's
adopted step lost `yields` after the first conflict and a second one
replayed its old position over a newer one. Its steps now stay as they
are, and only this page's own collapse into one edit on top of them.
The move combines recently viewed items one per item, keeping the newest
view and its artwork, then newest first; before, the server's older copy
of an item won over a later browser view.
A failed sign-in clears the stored token only on a 401: a network
failure says nothing about the token, and another tab may have stored
the same one meanwhile.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
