Fix Windows + Git Bash compatibility, auth-retry hang, base ref validation#294

Joepaken wants to merge 1 commit intoopenai:mainopenai/codex-plugin-cc:mainfrom

Joepaken:fix/windows-shell-and-retry-improvementsJoepaken/codex-plugin-cc:fix/windows-shell-and-retry-improvementsCopy head branch name to clipboard