a1da6ff5ac
feat(oauth): add support for customizable OAuth callback ports - Introduced `oauth-callback-port` flag to override default callback ports. - Updated SDK and login flows for `iflow`, `gemini`, `antigravity`, `codex`, `claude`, and `openai` to respect configurable callback ports. - Refactored internal OAuth servers to dynamically assign ports based on the provided options. - Revised tests and documentation to reflect the new flag and behavior.