Début refacto en MVVM (Login, drawer OK

em2rp/lib/models/user_model.dart

@@ -0,0 +1,44 @@
+class UserModel {
+  final String uid;
+  final String firstName;
+  final String lastName;
+  final String role;
+  final String profilePhotoUrl;
+  final String email;
+  final String phoneNumber;
+
+  UserModel({
+    required this.uid,
+    required this.firstName,
+    required this.lastName,
+    required this.role,
+    required this.profilePhotoUrl,
+    required this.email,
+    required this.phoneNumber,
+  });
+
+  // Convertit une Map (Firestore) en UserModel
+  factory UserModel.fromMap(Map<String, dynamic> data, String uid) {
+    return UserModel(
+      uid: uid,
+      firstName: data['firstName'] ?? '',
+      lastName: data['lastName'] ?? '',
+      role: data['role'] ?? 'USER',
+      profilePhotoUrl: data['profilePhotoUrl'] ?? '',
+      email: data['email'] ?? '',
+      phoneNumber: data['phoneNumber'] ?? '',
+    );
+  }
+
+  // Convertit un UserModel en Map pour Firestore
+  Map<String, dynamic> toMap() {
+    return {
+      'firstName': firstName,
+      'lastName': lastName,
+      'role': role,
+      'profilePhotoUrl': profilePhotoUrl,
+      'email': email,
+      'phoneNumber': phoneNumber,
+    };
+  }
+}