persistAndBindConnection's addToManager/visibleServerId parameters and post-commit manager phase had no production caller (the Jellyfin flow defers runtime pickup to the profile binder) — the function is void now. A failed Plex account add threw a StateError that PlexPinAuthFlow re-rendered as a raw 'Bad state:' string beside the already-rendered inline error; the flow's normal return already stops the spinner, so the inline error is the single surface.