Drops the per-server pin list down to the one server your account is
bound to, adds an enforced network timeout, and replaces the global
status toast inside settings with inline feedback and a reusable
confirm dialog for rotate/log out. Mail-fetching preferences move into
the server tab; the now-superseded claim/recall forms are gone since
onboarding covers both.
Generate-or-recover an identity, establish server trust, then bind an
address — each its own screen with no bleed-through, replacing the
old intro/restore cards plus the post-hoc setup checklist banner.
