A client that could not authorize against a foreign signal server was
redirected into a dead end with no way to retry, so servers joined from
another signal route became unreachable.
The home server now stores a per-user provision secret, clients keep it in
their own store, and a recovery service records why authorization failed per
server URL. Invite, server browser, and chat room surface that reason and
offer a retry instead of silently redirecting.
myxelium