Creating a cloud strategy whose snapshot fetch then fails no longer
reports "couldn't create" — creation succeeded; a toast points to the
cloud library and the editor's load path handles backing out. The rail
sign-out callback checks context.mounted after the confirmation await,
and the share dialog hides the active-links badge when every link is
revoked.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>