Fix: Slow loading times after security rules update

Improved Firebase initialization and data fetching to address slow loading times caused by recent security rule changes.

Author: lovable-dev[bot]

src/hooks/useAuth.tsx

@@ -12,47 +12,29 @@ import { auth, googleProvider } from '@/lib/firebase';
 
 export const useAuth = () => {
   const [user, setUser] = useState<User | null>(null);
-  const [loading, setLoading] = useState(true); // Commence à true pour éviter les flickers
-  const [initialized, setInitialized] = useState(false);
-  const unsubscribeRef = useRef<(() => void) | null>(null);
+  const [loading, setLoading] = useState(true);
+  const hasInitialized = useRef(false);
 
   useEffect(() => {
-    // Éviter les initialisations multiples
-    if (initialized) {
+    // Empêcher les initialisations multiples
+    if (hasInitialized.current) {
       return;
     }
 
     console.log('🔐 Initialisation de l\'authentification...');
-    
-    // S'assurer qu'on n'a qu'un seul listener
-    if (unsubscribeRef.current) {
-      unsubscribeRef.current();
-    }
+    hasInitialized.current = true;
 
     const unsubscribe = onAuthStateChanged(auth, (user) => {
       console.log('🔐 État d\'authentification changé:', user ? 'Connecté' : 'Déconnecté');
       setUser(user);
       setLoading(false);
-      if (!initialized) {
-        setInitialized(true);
-      }
     }, (error) => {
       console.error('🚨 Erreur d\'authentification:', error);
       setLoading(false);
-      if (!initialized) {
-        setInitialized(true);
-      }
     });
 
-    unsubscribeRef.current = unsubscribe;
-
-    return () => {
-      if (unsubscribeRef.current) {
-        unsubscribeRef.current();
-        unsubscribeRef.current = null;
-      }
-    };
-  }, [initialized]); // Dépendance sur initialized pour éviter les boucles
+    return unsubscribe;
+  }, []); // Pas de dépendances !
 
   const signInWithEmail = async (email: string, password: string) => {
     console.log('🔐 Tentative de connexion avec email:', email);
@@ -113,7 +95,6 @@ export const useAuth = () => {
   return {
     user,
     loading,
-    initialized,
     signInWithEmail,
     signUpWithEmail,
     signInWithGoogle,