feat: Add User and UserBalance models with serialization methods

feat: Implement BalanceRepository for group balance calculations

feat: Create ExpenseRepository for managing expenses

feat: Add services for handling expenses and storage operations

fix: Update import paths for models in repositories and services

refactor: Rename CountContent to AccountContent in HomePage

chore: Add StorageService for image upload and management

lib/components/account/account_content.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:travel_mate/blocs/user/user_bloc.dart';
-import '../../data/models/account.dart';
+import '../../models/account.dart';
 import '../../blocs/account/account_bloc.dart';
 import '../../blocs/account/account_event.dart';
 import '../../blocs/account/account_state.dart';

lib/components/account/add_expense_dialog.dart

@@ -3,12 +3,13 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:intl/intl.dart';
-import '../../blocs/account/account_bloc.dart';
-import '../../blocs/account/account_event.dart';
-import '../../blocs/account/account_state.dart';
+import 'package:travel_mate/models/expense_split.dart';
+import '../../blocs/expense/expense_bloc.dart';
+import '../../blocs/expense/expense_event.dart';
+import '../../blocs/expense/expense_state.dart';
 import '../../blocs/user/user_state.dart' as user_state;
-import '../../data/models/group.dart';
-import '../../data/models/expense.dart';
+import '../../models/group.dart';
+import '../../models/expense.dart';
 
 class AddExpenseDialog extends StatefulWidget {
   final Group group;
@@ -148,8 +149,8 @@ class _AddExpenseDialogState extends State<AddExpenseDialog> {
 
     try {
       // Convertir en EUR
-      final amountInEur = context.read<CountBloc>().state is ExpensesLoaded
-          ? (context.read<CountBloc>().state as ExpensesLoaded)
+      final amountInEur = context.read<ExpenseBloc>().state is ExpensesLoaded
+          ? (context.read<ExpenseBloc>().state as ExpensesLoaded)
               .exchangeRates[_selectedCurrency]! * amount
           : amount;
 
@@ -168,15 +169,16 @@ class _AddExpenseDialogState extends State<AddExpenseDialog> {
         splits: selectedSplits,
         date: _selectedDate,
         receiptUrl: widget.expenseToEdit?.receiptUrl,
+        createdAt: widget.expenseToEdit?.createdAt ?? DateTime.now(),
       );
 
       if (widget.expenseToEdit == null) {
-        context.read<CountBloc>().add(CreateExpense(
+        context.read<ExpenseBloc>().add(CreateExpense(
           expense: expense,
           receiptImage: _receiptImage,
         ));
       } else {
-        context.read<CountBloc>().add(UpdateExpense(
+        context.read<ExpenseBloc>().add(UpdateExpense(
           expense: expense,
           newReceiptImage: _receiptImage,
         ));

lib/components/account/balances_tab.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
-import '../../data/models/balance.dart';
+import '../../models/user_balance.dart';
 
 class BalancesTab extends StatelessWidget {
-  final List<Balance> balances;
+  final List<UserBalance> balances;
 
   const BalancesTab({
     super.key,
@@ -27,7 +27,7 @@ class BalancesTab extends StatelessWidget {
     );
   }
 
-  Widget _buildBalanceCard(BuildContext context, Balance balance) {
+  Widget _buildBalanceCard(BuildContext context, UserBalance balance) {
     final isDark = Theme.of(context).brightness == Brightness.dark;
     
     Color balanceColor;

lib/components/account/expense_detail_dialog.dart

@@ -1,12 +1,13 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:intl/intl.dart';
-import '../../blocs/account/account_bloc.dart';
-import '../../blocs/account/account_event.dart';
+import 'package:travel_mate/models/expense_split.dart';
+import '../../blocs/expense/expense_bloc.dart';
+import '../../blocs/expense/expense_event.dart';
 import '../../blocs/user/user_bloc.dart';
 import '../../blocs/user/user_state.dart' as user_state;
-import '../../data/models/expense.dart';
-import '../../data/models/group.dart';
+import '../../models/expense.dart';
+import '../../models/group.dart';
 import 'add_expense_dialog.dart';
 
 class ExpenseDetailDialog extends StatelessWidget {
@@ -267,8 +268,7 @@ class ExpenseDetailDialog extends StatelessWidget {
                 IconButton(
                   icon: const Icon(Icons.check_circle, color: Colors.green),
                   onPressed: () {
-                    context.read<CountBloc>().add(MarkSplitAsPaid(
-                      groupId: expense.groupId,
+                    context.read<ExpenseBloc>().add(MarkSplitAsPaid(
                       expenseId: expense.id,
                       userId: split.userId,
                     ));
@@ -287,7 +287,7 @@ class ExpenseDetailDialog extends StatelessWidget {
     showDialog(
       context: context,
       builder: (dialogContext) => BlocProvider.value(
-        value: context.read<CountBloc>(),
+        value: context.read<ExpenseBloc>(),
         child: AddExpenseDialog(
           group: group,
           currentUser: currentUser,
@@ -310,9 +310,8 @@ class ExpenseDetailDialog extends StatelessWidget {
           ),
           TextButton(
             onPressed: () {
-              context.read<CountBloc>().add(DeleteExpense(
-                groupId: expense.groupId,
-                expenseId: expense.id,
+              context.read<ExpenseBloc>().add(DeleteExpense(
+                expense.id,
               ));
               Navigator.of(dialogContext).pop();
               Navigator.of(context).pop();
@@ -338,9 +337,8 @@ class ExpenseDetailDialog extends StatelessWidget {
           ),
           TextButton(
             onPressed: () {
-              context.read<CountBloc>().add(ArchiveExpense(
-                groupId: expense.groupId,
-                expenseId: expense.id,
+              context.read<ExpenseBloc>().add(ArchiveExpense(
+                expense.id,
               ));
               Navigator.of(dialogContext).pop();
               Navigator.of(context).pop();

lib/components/account/expenses_tab.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
-import '../../data/models/expense.dart';
-import '../../data/models/group.dart';
+import '../../models/expense.dart';
+import '../../models/group.dart';
 import 'expense_detail_dialog.dart';
 
 class ExpensesTab extends StatelessWidget {

lib/components/account/settlements_tab.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import '../../data/models/balance.dart';
+import '../../models/settlement.dart';
 
 class SettlementsTab extends StatelessWidget {
   final List<Settlement> settlements;