feat: Implement account management functionality with loading, creation, and error handling

lib/services/account_service.dart

@@ -0,0 +1,62 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:travel_mate/services/error_service.dart';
+import '../data/models/account.dart';
+
+class AccountService {
+  final _errorService = ErrorService();
+  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
+
+  Stream<List<Account>> getAccountsStream() {
+    return _firestore.collection('accounts').snapshots().map((snapshot) {
+      return snapshot.docs.map((doc) {
+        return Account.fromMap(doc.data());
+      }).toList();
+    });
+  }
+
+  Future<bool> createAccount(Account account) async {
+    try {
+      await _firestore.collection('accounts').add(account.toMap());
+      return true;
+    } catch (e) {
+      _errorService.logError('Erreur lors de la création du compte: $e', StackTrace.current);
+      return false;
+    }
+  }
+
+  Future<bool> updateAccount(Account account) async {
+    try {
+      await _firestore.collection('accounts').doc(account.id).update(account.toMap());
+      return true;
+    } catch (e) {
+      _errorService.logError('Erreur lors de la mise à jour du compte: $e', StackTrace.current);
+      return false;
+    }
+  }
+
+  Future<bool> deleteAccount(String accountId) async {
+    try {
+      await _firestore.collection('accounts').doc(accountId).delete();
+      return true;
+    } catch (e) {
+      _errorService.logError('Erreur lors de la suppression du compte: $e', StackTrace.current);
+      return false;
+    }
+  }
+ 
+
+  Stream<List<Account>> getAccountsStreamByUser(String userId) {
+    return _firestore
+        .collection('accounts')
+        .where('members', arrayContains: userId)
+        .snapshots()
+        .map((snapshot) {
+      return snapshot.docs.map((doc) {
+        final account = Account.fromMap(doc.data());
+        _errorService.logError('Compte: ${account.name}, Membres: ${account.members.length}', StackTrace.current);
+        return account;
+      }).toList();
+    });
+  }
+
+}