fix and update

apps/frontend/lib/api.ts

@@ -598,6 +598,29 @@ export async function syncFedcmSession(accessToken?: string | null) {
   }
 }
 
+export interface FedcmSessionStatus {
+  active: boolean;
+  requiresPin: boolean;
+  sessionId: string | null;
+  userId: string | null;
+}
+
+export async function fetchFedcmSessionStatus(apiBase: string): Promise<FedcmSessionStatus | null> {
+  if (typeof window === 'undefined' || !apiBase.trim()) return null;
+  const base = apiBase.replace(/\/+$/, '');
+  try {
+    const response = await fetch(`${base}/fedcm/session/status`, {
+      method: 'GET',
+      credentials: 'include',
+      cache: 'no-store'
+    });
+    if (!response.ok) return null;
+    return (await response.json()) as FedcmSessionStatus;
+  } catch {
+    return null;
+  }
+}
+
 let fedcmSyncTimer: ReturnType<typeof setTimeout> | null = null;
 let fedcmSyncInFlight = false;
 

apps/frontend/lib/fedcm-login-bridge.ts

@@ -45,3 +45,11 @@ export async function finalizeFedcmLogin(accessToken: string) {
 export function shouldFinalizeFedcmLogin(pathname: string) {
   return pathname.startsWith('/auth/login');
 }
+
+export function isFedcmLoginPopup() {
+  if (typeof window === 'undefined') return false;
+  if (window.opener) return true;
+  if (window.IdentityProvider?.close) return true;
+  const params = new URLSearchParams(window.location.search);
+  return params.get('fedcm') === '1';
+}