feat(auth): restore authenticated user profile

eme-frontend/lib/services/auth_service.dart

@@ -1,3 +1,4 @@
+import "../models/authenticated_profile.dart";
 import "msal_bridge.dart";
 
 enum AuthenticationMode { demo, azure }
@@ -19,8 +20,11 @@ class AuthService {
   static const String demoResponsableEmail = "karim.benali@ensup.eu";
 
   static String? _demoEmail;
+  static AuthenticatedProfile? _currentProfile;
   static bool _azureInitialized = false;
 
+  static AuthenticatedProfile? get currentProfile => _currentProfile;
+
   static AuthenticationMode get mode {
     return switch (_configuredMode) {
       "demo" => AuthenticationMode.demo,
@@ -41,6 +45,13 @@ class AuthService {
 
   static void clearSession() {
     _demoEmail = null;
+    _currentProfile = null;
+  }
+
+  static AuthenticatedProfile setProfileFromApi(dynamic reponse) {
+    final profile = AuthenticatedProfile.fromApi(reponse);
+    _currentProfile = profile;
+    return profile;
   }
 
   static Future<void> signInWithMicrosoft() async {
@@ -57,6 +68,7 @@ class AuthService {
     if (mode == AuthenticationMode.azure) {
       await _initializeAzure();
       await MsalBridge.signOut();
+      _currentProfile = null;
       return;
     }