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/server/src/routes/index.ts

@@ -17,6 +17,7 @@ import { providerRoutes } from './hermes/providers'
 import { configRoutes } from './hermes/config'
 import { logRoutes } from './hermes/logs'
 import { codexAuthRoutes } from './hermes/codex-auth'
+import { nousAuthRoutes } from './hermes/nous-auth'
 import { gatewayRoutes } from './hermes/gateways'
 import { weixinRoutes } from './hermes/weixin'
 import { proxyRoutes, proxyMiddleware } from './hermes/proxy'
@@ -48,6 +49,7 @@ export function registerRoutes(app: any, requireAuth: (ctx: Context, next: Next)
   app.use(configRoutes.routes())
   app.use(logRoutes.routes())
   app.use(codexAuthRoutes.routes())
+  app.use(nousAuthRoutes.routes())
   app.use(gatewayRoutes.routes())
   app.use(weixinRoutes.routes())
   app.use(proxyRoutes.routes())