Début refacto en MVVM (Login, drawer OK

em2rp/lib/services/user_service.dart

@@ -0,0 +1,44 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:firebase_auth/firebase_auth.dart';
+import '../models/user_model.dart';
+
+class UserService {
+  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
+
+  Future<List<UserModel>> fetchUsers() async {
+    try {
+      final snapshot = await _firestore.collection('users').get();
+      return snapshot.docs
+          .map((doc) => UserModel.fromMap(doc.data(), doc.id))
+          .toList();
+    } catch (e) {
+      print("Erreur: $e");
+      return [];
+    }
+  }
+
+  Future<void> updateUser(UserModel user) async {
+    try {
+      await _firestore.collection('users').doc(user.uid).update(user.toMap());
+    } catch (e) {
+      print("Erreur mise à jour: $e");
+    }
+  }
+
+  Future<void> deleteUser(String uid) async {
+    try {
+      await _firestore.collection('users').doc(uid).delete();
+    } catch (e) {
+      print("Erreur suppression: $e");
+    }
+  }
+
+  Future<void> resetPassword(String email) async {
+    try {
+      await FirebaseAuth.instance.sendPasswordResetEmail(email: email);
+      print("Email de réinitialisation envoyé à $email");
+    } catch (e) {
+      print("Erreur reset password: $e");
+    }
+  }
+}