* Scope Claude Keychain lookup and disable PTY fallback for system auth
* Scope macOS Keychain credential lookups to the config directory first to support Claude Code 2.1+, falling back to the legacy system default.
* Disable Claude CLI PTY execution fallback for system-default accounts during usage refreshes to avoid launching unexpected browser auth flows.
* Disable Claude PTY fallback when auth preparation is unavailable
Treat missing Claude auth preparation as system-default. This aligns
the PTY fallback gate to prevent background refreshes from triggering
interactive authentication flows when no auth is configured.
Jinjing
953b325180