Fix: Authentication issues after Firestore rules update

Addressed continued authentication problems after Firestore rules update.  Identified and addressed potential causes, including Firebase configuration and environment variables.  Provided guidance on troubleshooting steps.

Author: lovable-dev[bot]

src/hooks/useAuth.tsx

@@ -19,10 +19,14 @@ export const useAuth = () => {
   const { executeWithRetry } = useRetry({ maxRetries: 2 });
 
   useEffect(() => {
+    console.log('🔐 Initialisation de l\'authentification...');
+    
     const unsubscribe = onAuthStateChanged(auth, (user) => {
+      console.log('🔐 État d\'authentification changé:', user ? 'Connecté' : 'Déconnecté');
       setUser(user);
       setLoading(false);
     }, (error) => {
+      console.error('🚨 Erreur d\'authentification:', error);
       handleError(error, { 
         showToast: true,
         logError: true 
@@ -34,45 +38,57 @@ export const useAuth = () => {
   }, [handleError]);
 
   const signInWithEmail = async (email: string, password: string) => {
+    console.log('🔐 Tentative de connexion avec email:', email);
     try {
-      await executeWithRetry(
+      const result = await executeWithRetry(
         () => signInWithEmailAndPassword(auth, email, password),
         { component: 'useAuth', action: 'signInWithEmail' }
       );
+      console.log('✅ Connexion réussie:', result.user.uid);
     } catch (error) {
-      throw error; // L'erreur a déjà été gérée par executeWithRetry
+      console.error('❌ Erreur de connexion:', error);
+      throw error;
     }
   };
 
   const signUpWithEmail = async (email: string, password: string) => {
+    console.log('🔐 Tentative de création de compte avec email:', email);
     try {
-      await executeWithRetry(
+      const result = await executeWithRetry(
         () => createUserWithEmailAndPassword(auth, email, password),
         { component: 'useAuth', action: 'signUpWithEmail' }
       );
+      console.log('✅ Compte créé:', result.user.uid);
     } catch (error) {
+      console.error('❌ Erreur de création de compte:', error);
       throw error;
     }
   };
 
   const signInWithGoogle = async () => {
+    console.log('🔐 Tentative de connexion avec Google');
     try {
-      await executeWithRetry(
+      const result = await executeWithRetry(
         () => signInWithPopup(auth, googleProvider),
         { component: 'useAuth', action: 'signInWithGoogle' }
       );
+      console.log('✅ Connexion Google réussie:', result.user.uid);
     } catch (error) {
+      console.error('❌ Erreur de connexion Google:', error);
       throw error;
     }
   };
 
   const logout = async () => {
+    console.log('🔐 Tentative de déconnexion');
     try {
       await executeWithRetry(
         () => signOut(auth),
         { component: 'useAuth', action: 'logout' }
       );
+      console.log('✅ Déconnexion réussie');
     } catch (error) {
+      console.error('❌ Erreur de déconnexion:', error);
       throw error;
     }
   };

src/lib/firebase.ts

@@ -2,7 +2,7 @@
 import { initializeApp } from "firebase/app";
 import { getAuth, GoogleAuthProvider } from "firebase/auth";
 import { getFirestore } from "firebase/firestore";
-import { getAnalytics } from "firebase/analytics";
+import { getAnalytics, isSupported } from "firebase/analytics";
 
 const firebaseConfig = {
   apiKey: import.meta.env.VITE_FIREBASE_API_KEY || "AIzaSyAlHsC-w7Sx18XKJ6dIcxvqj-AUdqkjqSE",
@@ -37,10 +37,17 @@ googleProvider.setCustomParameters({
   prompt: 'select_account'
 });
 
-// Analytics (optional, only if in browser and measurement ID provided)
-export const analytics = 
-  typeof window !== 'undefined' && firebaseConfig.measurementId 
-    ? getAnalytics(app) 
-    : null;
+// Analytics avec vérification de support
+export const analytics = await (async () => {
+  try {
+    if (typeof window !== 'undefined' && firebaseConfig.measurementId && await isSupported()) {
+      return getAnalytics(app);
+    }
+    return null;
+  } catch (error) {
+    console.warn('Analytics non disponible dans cet environnement');
+    return null;
+  }
+})();
 
 export default app;