Better indication of logged-out client

If the apptoken is revoked for a valid reason - e.g. due to a password change in Nextcloud - the desktop client stops syncing.
The task bar icon changes (e.g. to grey on Windows) but it might not be immediately visible to the user.

Better alternatives like e.g. notifications should be evaluated

Start by reproducing the client state after an app token is revoked, such as after a password change, and inspect how the taskbar icon reflects that state. Evaluate notification or other visible alternatives for indicating that syncing has stopped. Done means a logged-out client state is clearly communicated to the user.

Written by the indexing model from the issue text.