feat: add StepFun and Nous Portal provider support (#140)

- 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>

packages/client/src/i18n/locales/de.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: 'Autorisierungsseite öffnen',
     codexApproved: 'Anmeldung erfolgreich',
     codexExpired: 'Die Autorisierung ist abgelaufen. Bitte versuchen Sie es erneut.',
+    nousLoginTitle: 'Nous Portal Login',
+    nousWaiting: 'Geben Sie diesen Code auf der Autorisierungsseite ein:',
+    nousCopyCode: 'Code kopiert',
+    nousOpenLink: 'Autorisierungsseite öffnen',
+    nousApproved: 'Login erfolgreich',
+    nousDenied: 'Autorisierung wurde abgelehnt',
+    nousExpired: 'Autorisierung abgelaufen',
     noProviders: 'Keine Anbieter gefunden. Fugen Sie einen benutzerdefinierten Anbieter hinzu, um zu beginnen.',
     builtIn: 'Integriert',
     customType: 'Benutzerdefiniert',

packages/client/src/i18n/locales/en.ts

@@ -268,6 +268,13 @@ export default {
     codexOpenLink: 'Open authorization page',
     codexApproved: 'Login successful',
     codexExpired: 'Authorization expired. Please try again.',
+    nousLoginTitle: 'Nous Portal Login',
+    nousWaiting: 'Enter this code at the authorization page to complete login:',
+    nousCopyCode: 'Code copied',
+    nousOpenLink: 'Open authorization page',
+    nousApproved: 'Login successful',
+    nousDenied: 'Authorization was denied. Please try again.',
+    nousExpired: 'Authorization expired. Please try again.',
     noProviders: 'No providers found. Add a custom provider to get started.',
     builtIn: 'Built-in',
     customType: 'Custom',

packages/client/src/i18n/locales/es.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: 'Abrir página de autorización',
     codexApproved: 'Inicio de sesión exitoso',
     codexExpired: 'La autorización ha expirado. Por favor, inténtelo de nuevo.',
+    nousLoginTitle: 'Inicio de sesión de Nous Portal',
+    nousWaiting: 'Ingrese este código en la página de autorización:',
+    nousCopyCode: 'Código copiado',
+    nousOpenLink: 'Abrir página de autorización',
+    nousApproved: 'Inicio de sesión exitoso',
+    nousDenied: 'Autorización denegada',
+    nousExpired: 'Autorización expirada',
     noProviders: 'No se encontraron proveedores. Anade un proveedor personalizado para comenzar.',
     builtIn: 'Integrado',
     customType: 'Personalizado',

packages/client/src/i18n/locales/fr.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: 'Ouvrir la page d\'autorisation',
     codexApproved: 'Connexion réussie',
     codexExpired: 'L\'autorisation a expiré. Veuillez réessayer.',
+    nousLoginTitle: 'Connexion Nous Portal',
+    nousWaiting: 'Entrez ce code sur la page d\'autorisation:',
+    nousCopyCode: 'Code copié',
+    nousOpenLink: 'Ouvrir la page d\'autorisation',
+    nousApproved: 'Connexion réussie',
+    nousDenied: 'Autorisation refusée',
+    nousExpired: 'Autorisation expirée',
     noProviders: 'Aucun fournisseur trouve. Ajoutez un fournisseur personnalise pour commencer.',
     builtIn: 'Integre',
     customType: 'Personnalise',

packages/client/src/i18n/locales/ja.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: '認証ページを開く',
     codexApproved: 'ログイン成功',
     codexExpired: '認証の有効期限が切れました。もう一度お試しください。',
+    nousLoginTitle: 'Nous Portal ログイン',
+    nousWaiting: '認証ページでこのコードを入力してください:',
+    nousCopyCode: 'コードをコピーしました',
+    nousOpenLink: '認証ページを開く',
+    nousApproved: 'ログイン成功',
+    nousDenied: '認証が拒否されました',
+    nousExpired: '認証の有効期限が切れました',
     noProviders: 'プロバイダーがありません。カスタムプロバイダーを追加して始めましょう。',
     builtIn: '組み込み',
     customType: 'カスタム',

packages/client/src/i18n/locales/ko.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: '인증 페이지 열기',
     codexApproved: '로그인 성공',
     codexExpired: '인증이 만료되었습니다. 다시 시도해주세요.',
+    nousLoginTitle: 'Nous Portal 로그인',
+    nousWaiting: '인증 페이지에서 이 코드를 입력하세요:',
+    nousCopyCode: '코드 복사됨',
+    nousOpenLink: '인증 페이지 열기',
+    nousApproved: '로그인 성공',
+    nousDenied: '인증이 거부되었습니다',
+    nousExpired: '인증이 만료되었습니다',
     noProviders: 'Provider가 없습니다. 사용자 지정 Provider를 추가하여 시작하세요.',
     builtIn: '내장',
     customType: '사용자 지정',

packages/client/src/i18n/locales/pt.ts

@@ -243,6 +243,13 @@ export default {
     codexOpenLink: 'Abrir página de autorização',
     codexApproved: 'Login bem-sucedido',
     codexExpired: 'A autorização expirou. Por favor, tente novamente.',
+    nousLoginTitle: 'Login do Nous Portal',
+    nousWaiting: 'Insira este código na página de autorização:',
+    nousCopyCode: 'Código copiado',
+    nousOpenLink: 'Abrir página de autorização',
+    nousApproved: 'Login bem-sucedido',
+    nousDenied: 'Autorização negada',
+    nousExpired: 'Autorização expirada',
     noProviders: 'Nenhum provedor encontrado. Adicione um provedor personalizado para comecar.',
     builtIn: 'Integrado',
     customType: 'Personalizado',

packages/client/src/i18n/locales/zh.ts

@@ -268,6 +268,13 @@ export default {
     codexOpenLink: '打开授权页面',
     codexApproved: '登录成功',
     codexExpired: '授权已过期，请重试。',
+    nousLoginTitle: 'Nous Portal 登录',
+    nousWaiting: '在授权页面输入此代码完成登录:',
+    nousCopyCode: '代码已复制',
+    nousOpenLink: '打开授权页面',
+    nousApproved: '登录成功',
+    nousDenied: '授权被拒绝，请重试。',
+    nousExpired: '授权已过期，请重试。',
     noProviders: '暂无 Provider，添加一个开始吧。',
     builtIn: '内置',
     customType: '自定义',