* refactor(auth): one sign-in flow behind SignInState, rendered by the CLI and the desktop
* feat(gateway): /signin signs the free tier into a Nous account from a DM
* feat(cli): chat surfaces name /signin as the sign-in verb
* fix(auth): review follow-ups for the shared sign-in flow and /signin
* fix(i18n): carry the /status free-tier line in every locale catalog
* refactor(cli): the chat sign-in command is /login
* fix(auth): durable override cleanup in the /login sweep, and the sign-in flow in its own modules
cbcf7b72f7