Provider auth controllers derived the credential directory with
`authPath.substring(0, authPath.lastIndexOf('/'))`. On Windows paths use
backslashes, so `lastIndexOf('/')` returns -1 and the slice yields an
empty string, making `mkdirSync('')` throw
`ENOENT: no such file or directory, mkdir ''` during OAuth login.
Replace the manual slicing with the cross-platform `path.dirname()` in
codex-auth (auth.json + codex CLI token paths), xai-auth, and nous-auth.
Fixes Codex/xAI/Nous login on Windows.
Co-authored-by: xingzhi <chuzihao.czh@alibaba-inc.com>
- Add StepFun provider (API key auth, STEPFUN_API_KEY)
- Add Nous Portal provider with full OAuth device code flow
(device code request → poll for token → mint agent key → save to auth.json)
- Add NousLoginModal component for OAuth UI (user code display + verification link)
- Update ProviderFormModal to handle Nous OAuth flow (hide API key fields)
- Add nous-auth backend controller and routes
- Update PROVIDER_ENV_MAP with stepfun and nous entries
- Add i18n translations for Nous OAuth in all 8 locales
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
