Fix: Implement iframe-compatible authentication

src/hooks/useAuth.tsx

@@ -98,8 +98,15 @@ function AuthProviderComponent({ children }: { children: React.ReactNode }) {
       const currentEmail = session?.user?.email;
       const newEmailPending = session?.user?.new_email;
       
+      // Explicitly handle SIGNED_IN event for iframe compatibility
+      if (event === 'SIGNED_IN' && session) {
+        setSession(session);
+        setUser(session.user);
+        setLoading(false);
+      } else {
         setSession(session);
         setUser(session?.user ?? null);
+      }
       
       // Track pending email changes
       setPendingEmail(newEmailPending ?? null);

src/integrations/supabase/client.ts

@@ -1,6 +1,7 @@
 // This file is automatically generated. Do not edit it directly.
 import { createClient } from '@supabase/supabase-js';
 import type { Database } from './types';
+import { authStorage } from '@/lib/authStorage';
 
 const SUPABASE_URL = "https://ydvtmnrszybqnbcqbdcy.supabase.co";
 const SUPABASE_PUBLISHABLE_KEY = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6InlkdnRtbnJzenlicW5iY3FiZGN5Iiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTgzMjYzNTYsImV4cCI6MjA3MzkwMjM1Nn0.DM3oyapd_omP5ZzIlrT0H9qBsiQBxBRgw2tYuqgXKX4";
@@ -10,7 +11,7 @@ const SUPABASE_PUBLISHABLE_KEY = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiO
 
 export const supabase = createClient<Database>(SUPABASE_URL, SUPABASE_PUBLISHABLE_KEY, {
   auth: {
-    storage: localStorage,
+    storage: authStorage,
     persistSession: true,
     autoRefreshToken: true,
   }

src/lib/authStorage.ts

@@ -0,0 +1,58 @@
+/**
+ * Custom storage adapter for Supabase authentication that handles iframe localStorage restrictions.
+ * Falls back to sessionStorage or in-memory storage if localStorage is blocked.
+ */
+class AuthStorage {
+  private storage: Storage | null = null;
+  private memoryStorage: Map<string, string> = new Map();
+  private storageType: 'localStorage' | 'sessionStorage' | 'memory' = 'memory';
+
+  constructor() {
+    // Try localStorage first
+    try {
+      localStorage.setItem('__supabase_test__', 'test');
+      localStorage.removeItem('__supabase_test__');
+      this.storage = localStorage;
+      this.storageType = 'localStorage';
+      console.log('[AuthStorage] Using localStorage');
+    } catch {
+      // Try sessionStorage as fallback
+      try {
+        sessionStorage.setItem('__supabase_test__', 'test');
+        sessionStorage.removeItem('__supabase_test__');
+        this.storage = sessionStorage;
+        this.storageType = 'sessionStorage';
+        console.log('[AuthStorage] localStorage blocked, using sessionStorage');
+      } catch {
+        // Use in-memory storage as last resort
+        this.storageType = 'memory';
+        console.log('[AuthStorage] Both localStorage and sessionStorage blocked, using in-memory storage');
+      }
+    }
+  }
+
+  getItem(key: string): string | null {
+    if (this.storage) {
+      return this.storage.getItem(key);
+    }
+    return this.memoryStorage.get(key) || null;
+  }
+
+  setItem(key: string, value: string): void {
+    if (this.storage) {
+      this.storage.setItem(key, value);
+    } else {
+      this.memoryStorage.set(key, value);
+    }
+  }
+
+  removeItem(key: string): void {
+    if (this.storage) {
+      this.storage.removeItem(key);
+    } else {
+      this.memoryStorage.delete(key);
+    }
+  }
+}
+
+export const authStorage = new AuthStorage();