fix and update

apps/api-gateway/src/lib/fedcm-config.ts

@@ -40,7 +40,7 @@ function buildFedcmEndpointUrls(issuer: string, frontendUrl: string) {
     idAssertionEndpoint: `${base}/fedcm/id_assertion`,
     // FedCM: login_url MUST be same-origin with config.json (W3C FedCM / Chrome).
     // На split-domain UI проксируется через nginx: api.idpmvk.lpr/auth/login → frontend.
-    loginUrl: `${base}/auth/login`,
+    loginUrl: `${base}/auth/login?fedcm=1`,
     signupUrl: `${front}/auth/register`,
     webIdentityUrl: `${webIdentityOrigin}/.well-known/web-identity`
   };