update

lib/core/constants.dart

@@ -74,6 +74,44 @@ class AppCategories {
   };
 }
 
+enum AmountFormat { commasDot, spacesDot, plain }
+
+extension AmountFormatExt on AmountFormat {
+  String get label {
+    switch (this) {
+      case AmountFormat.commasDot: return '1,234,567.89';
+      case AmountFormat.spacesDot: return '1 234 567.89';
+      case AmountFormat.plain:     return '1234567.89';
+    }
+  }
+
+  String get example {
+    switch (this) {
+      case AmountFormat.commasDot: return 'SYM 1,234.56';
+      case AmountFormat.spacesDot: return 'SYM 1 234.56';
+      case AmountFormat.plain:     return 'SYM 1234.56';
+    }
+  }
+
+  String format(double amount) {
+    switch (this) {
+      case AmountFormat.commasDot:
+        // groups of 3 with commas, dot decimal
+        final parts = amount.toStringAsFixed(2).split('.');
+        final intPart = parts[0].replaceAllMapped(
+          RegExp(r'(\d)(?=(\d{3})+$)'), (m) => '${m[1]},');
+        return '$intPart.${parts[1]}';
+      case AmountFormat.spacesDot:
+        final parts = amount.toStringAsFixed(2).split('.');
+        final intPart = parts[0].replaceAllMapped(
+          RegExp(r'(\d)(?=(\d{3})+$)'), (m) => '${m[1]} ');
+        return '$intPart.${parts[1]}';
+      case AmountFormat.plain:
+        return amount.toStringAsFixed(2);
+    }
+  }
+}
+
 class CurrencyOption {
   final String symbol;
   final String name;

lib/features/categories/screen.dart

@@ -5,6 +5,7 @@ import 'package:go_router/go_router.dart';
 import 'package:intl/intl.dart';
 import '../../core/constants.dart';
 import '../../shared/utils/currency_utils.dart';
+import '../../shared/providers/amount_format_provider.dart';
 import '../settings/provider.dart';
 import 'provider.dart';
 
@@ -180,7 +181,7 @@ class _ToggleButton extends StatelessWidget {
   }
 }
 
-class _PieChartCard extends StatelessWidget {
+class _PieChartCard extends ConsumerWidget {
   final Map<String, double> data;
   final double total;
   final int touchedIndex;
@@ -196,7 +197,8 @@ class _PieChartCard extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final entries = data.entries.toList();
 
     return Container(
@@ -258,7 +260,7 @@ class _PieChartCard extends StatelessWidget {
                           ),
                     ),
                     Text(
-                      formatAmount(currency, total),
+                      formatAmount(currency, total, fmt),
                       style: Theme.of(context).textTheme.titleMedium?.copyWith(
                             color: Theme.of(context).colorScheme.onSurface,
                             fontWeight: FontWeight.w700,
@@ -275,13 +277,14 @@ class _PieChartCard extends StatelessWidget {
   }
 }
 
-class _BarChartCard extends StatelessWidget {
+class _BarChartCard extends ConsumerWidget {
   final List<MonthlyData> monthlyData;
   final String currency;
   const _BarChartCard({required this.monthlyData, required this.currency});
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final maxY = monthlyData.map((e) => e.amount).reduce((a, b) => a > b ? a : b);
     final adjustedMaxY = maxY * 1.2;
 
@@ -312,7 +315,7 @@ class _BarChartCard extends StatelessWidget {
                   touchTooltipData: BarTouchTooltipData(
                     getTooltipItem: (group, groupIndex, rod, rodIndex) {
                       return BarTooltipItem(
-                        formatAmount(currency, rod.toY),
+                        formatAmount(currency, rod.toY, fmt),
                         TextStyle(
                           color: Theme.of(context).colorScheme.onPrimary,
                           fontWeight: FontWeight.w600,
@@ -390,7 +393,7 @@ class _BarChartCard extends StatelessWidget {
   }
 }
 
-class _CategoryRow extends StatelessWidget {
+class _CategoryRow extends ConsumerWidget {
   final int rank;
   final String category;
   final double amount;
@@ -405,7 +408,8 @@ class _CategoryRow extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final color = AppCategories.colors[category] ?? AppColors.accent;
     final icon = AppCategories.icons[category] ?? Icons.category_rounded;
     final pct = total > 0 ? amount / total : 0.0;
@@ -459,7 +463,7 @@ class _CategoryRow extends StatelessWidget {
                 crossAxisAlignment: CrossAxisAlignment.end,
                 children: [
                   Text(
-                    formatAmount(currency, amount),
+                    formatAmount(currency, amount, fmt),
                     style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                           color: AppColors.expense,
                           fontWeight: FontWeight.w700,

lib/features/dashboard/screen.dart

@@ -5,6 +5,7 @@ import 'package:intl/intl.dart';
 import '../../core/constants.dart';
 import '../../shared/models/transaction.dart';
 import '../../shared/utils/currency_utils.dart';
+import '../../shared/providers/amount_format_provider.dart';
 import '../settings/provider.dart';
 import 'provider.dart';
 
@@ -245,7 +246,7 @@ class _FilterChip extends StatelessWidget {
   }
 }
 
-class _BudgetProgress extends StatelessWidget {
+class _BudgetProgress extends ConsumerWidget {
   final double spent;
   final double budget;
   final CurrencyInfo currencyInfo;
@@ -257,7 +258,8 @@ class _BudgetProgress extends StatelessWidget {
   }
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final ratio = spent / budget;
     final color = ratio >= 1.0
         ? AppColors.expense
@@ -308,13 +310,13 @@ class _BudgetProgress extends StatelessWidget {
             mainAxisAlignment: MainAxisAlignment.spaceBetween,
             children: [
               Text(
-                'Spent: ${formatAmount(currencyInfo.symbol, spent)}',
+                'Spent: ${formatAmount(currencyInfo.symbol, spent, fmt)}',
                 style: Theme.of(context).textTheme.bodySmall?.copyWith(
                       color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                     ),
               ),
               Text(
-                'Limit: ${formatAmount(currencyInfo.symbol, budget)}',
+                'Limit: ${formatAmount(currencyInfo.symbol, budget, fmt)}',
                 style: Theme.of(context).textTheme.bodySmall?.copyWith(
                       color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                     ),
@@ -327,14 +329,15 @@ class _BudgetProgress extends StatelessWidget {
   }
 }
 
-class _BudgetWarning extends StatelessWidget {
+class _BudgetWarning extends ConsumerWidget {
   final double spent;
   final double budget;
   final CurrencyInfo currencyInfo;
   const _BudgetWarning({required this.spent, required this.budget, required this.currencyInfo});
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final over = spent - budget;
     final isDark = Theme.of(context).brightness == Brightness.dark;
     return Container(
@@ -350,7 +353,7 @@ class _BudgetWarning extends StatelessWidget {
           const SizedBox(width: 10),
           Expanded(
             child: Text(
-              'Budget exceeded by ${formatAmount(currencyInfo.symbol, over)}',
+              'Budget exceeded by ${formatAmount(currencyInfo.symbol, over, fmt)}',
               style: Theme.of(context).textTheme.bodySmall?.copyWith(
                     color: AppColors.expense,
                     fontWeight: FontWeight.w600,
@@ -371,6 +374,7 @@ class _BalanceCard extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final rates = ref.read(exchangeRateServiceProvider);
+    final fmt = ref.watch(amountFormatProvider);
     final allCurrencies = [
       ('USD', '\$'),
       ('EUR', '€'),
@@ -381,7 +385,8 @@ class _BalanceCard extends ConsumerWidget {
 
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.all(24),
+      height: 140,
+      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
       decoration: BoxDecoration(
         gradient: LinearGradient(
           colors: [
@@ -426,7 +431,7 @@ class _BalanceCard extends ConsumerWidget {
                       fit: BoxFit.scaleDown,
                       alignment: Alignment.centerLeft,
                       child: Text(
-                        formatAmount(currencyInfo.symbol, balance),
+                        formatAmount(currencyInfo.symbol, balance, fmt),
                         style: TextStyle(
                           fontSize: 36, // max font size
                           fontWeight: FontWeight.w700,
@@ -463,7 +468,7 @@ class _BalanceCard extends ConsumerWidget {
                               fit: BoxFit.scaleDown,
                               alignment: Alignment.centerLeft,
                               child: Text(
-                                formatAmount(c.$2, converted),
+                                formatAmount(c.$2, converted, fmt),
                                 style: TextStyle(
                                   fontSize: 13,
                                   fontWeight: FontWeight.w500,
@@ -505,7 +510,7 @@ class _SummaryRow extends StatelessWidget {
   }
 }
 
-class _SummaryCard extends StatelessWidget {
+class _SummaryCard extends ConsumerWidget {
   final String label;
   final double amount;
   final Color color;
@@ -519,7 +524,8 @@ class _SummaryCard extends StatelessWidget {
   }
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     return Container(
       padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
@@ -545,7 +551,7 @@ class _SummaryCard extends StatelessWidget {
                 Text(label, style: Theme.of(context).textTheme.bodySmall?.copyWith(color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6))),
                 const SizedBox(height: 2),
                 Text(
-                  formatAmount(currencyInfo.symbol, amount),
+                  formatAmount(currencyInfo.symbol, amount, fmt),
                   style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                         color: color,
                         fontWeight: FontWeight.w600,
@@ -561,7 +567,7 @@ class _SummaryCard extends StatelessWidget {
   }
 }
 
-class _TransactionTile extends StatelessWidget {
+class _TransactionTile extends ConsumerWidget {
   final Transaction transaction;
   const _TransactionTile({required this.transaction});
 
@@ -571,7 +577,8 @@ class _TransactionTile extends StatelessWidget {
   }
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final fmt = ref.watch(amountFormatProvider);
     final isIncome = transaction.type == TransactionType.income;
     final color = isIncome ? AppColors.income : AppColors.expense;
     final catColor = AppCategories.colors[transaction.category] ?? AppColors.accent;
@@ -627,7 +634,7 @@ class _TransactionTile extends StatelessWidget {
               ),
             ),
             Text(
-              '${isIncome ? '+' : '-'}${formatAmount(transaction.currency, transaction.amount)}',
+              '${isIncome ? '+' : '-'}${formatAmount(transaction.currency, transaction.amount, fmt)}',
               style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                     color: color,
                     fontWeight: FontWeight.w700,

lib/features/settings/provider.dart

@@ -4,8 +4,10 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:intl/intl.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import '../../core/constants.dart';
 import '../../shared/services/exchange_rate_service.dart';
 import '../../shared/utils/currency_utils.dart';
+import '../../shared/providers/amount_format_provider.dart';
 import '../dashboard/provider.dart';
 
 final budgetProvider = StateNotifierProvider<BudgetNotifier, double?>((ref) {
@@ -115,6 +117,7 @@ class ExportService {
   Future<String> exportToCSV() async {
     final transactions = _ref.read(transactionsProvider);
     final currency = _ref.read(currencyProvider);
+    final fmt = _ref.read(amountFormatProvider);
 
     // CSV header
     final buffer = StringBuffer();
@@ -125,7 +128,7 @@ class ExportService {
       final date = DateFormat('yyyy-MM-dd').format(tx.date);
       final type = tx.type.name;
       final category = tx.category;
-      final amount = formatAmount(tx.currency, tx.amount);
+      final amount = formatAmount(tx.currency, tx.amount, fmt);
       final note = tx.note?.replaceAll(',', ';') ?? '';
       buffer.writeln('$date,$type,$category,$amount,${tx.currencyCode},$note');
     }

lib/features/settings/screen.dart

@@ -5,6 +5,7 @@ import 'package:go_router/go_router.dart';
 import 'package:intl/intl.dart';
 import '../../core/constants.dart';
 import '../../shared/utils/currency_utils.dart';
+import '../../shared/providers/amount_format_provider.dart';
 import 'provider.dart';
 
 class SettingsScreen extends ConsumerStatefulWidget {
@@ -55,6 +56,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
     final themeMode = ref.watch(themeProvider);
     final isDarkMode = themeMode == ThemeMode.dark;
     final currencyInfo = ref.watch(currencyProvider);
+    final fmt = ref.watch(amountFormatProvider);
     final isDark = Theme.of(context).brightness == Brightness.dark;
 
     // Update currency format when it changes
@@ -235,7 +237,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                       children: [
                         Text(
                           budget != null
-                              ? formatAmount(currencyInfo.symbol, budget)
+                              ? formatAmount(currencyInfo.symbol, budget, fmt)
                               : 'Not set',
                           style: Theme.of(context).textTheme.headlineSmall?.copyWith(
                                 color: budget != null ? AppColors.accent : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
@@ -258,6 +260,89 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
             ),
             const SizedBox(height: 16),
 
+            // Amount Format Selector
+            Container(
+              padding: const EdgeInsets.all(20),
+              decoration: BoxDecoration(
+                color: Theme.of(context).colorScheme.surface,
+                borderRadius: BorderRadius.circular(16),
+                border: isDark ? null : Border.all(color: const Color(0xFFDDDDEE), width: 1),
+              ),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Row(
+                    children: [
+                      Container(
+                        padding: const EdgeInsets.all(10),
+                        decoration: BoxDecoration(
+                          color: AppColors.accent.withOpacity(0.15),
+                          borderRadius: BorderRadius.circular(12),
+                        ),
+                        child: const Icon(
+                          Icons.format_list_numbered_rounded,
+                          color: AppColors.accent,
+                          size: 20,
+                        ),
+                      ),
+                      const SizedBox(width: 12),
+                      Expanded(
+                        child: Text(
+                          'Amount Format',
+                          style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                                fontWeight: FontWeight.w600,
+                                color: Theme.of(context).colorScheme.onSurface,
+                              ),
+                        ),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 16),
+                  ...AmountFormat.values.map((format) {
+                    final isSelected = fmt == format;
+                    return Padding(
+                      padding: const EdgeInsets.only(bottom: 8),
+                      child: GestureDetector(
+                        onTap: () => ref.read(amountFormatProvider.notifier).set(format),
+                        child: Container(
+                          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+                          decoration: BoxDecoration(
+                            color: isSelected
+                                ? AppColors.accent.withOpacity(0.2)
+                                : Theme.of(context).scaffoldBackgroundColor,
+                            borderRadius: BorderRadius.circular(12),
+                            border: isSelected
+                                ? Border.all(color: AppColors.accent, width: 1.5)
+                                : (isDark ? null : Border.all(color: const Color(0xFFDDDDEE), width: 1)),
+                          ),
+                          child: Row(
+                            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                            children: [
+                              Text(
+                                format.label,
+                                style: TextStyle(
+                                  color: isSelected ? AppColors.accent : Theme.of(context).colorScheme.onSurface,
+                                  fontWeight: isSelected ? FontWeight.w600 : FontWeight.w500,
+                                ),
+                              ),
+                              Text(
+                                format.example.replaceFirst('SYM', currencyInfo.symbol),
+                                style: TextStyle(
+                                  color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
+                                  fontSize: 12,
+                                ),
+                              ),
+                            ],
+                          ),
+                        ),
+                      ),
+                    );
+                  }).toList(),
+                ],
+              ),
+            ),
+            const SizedBox(height: 16),
+
             // Currency Selector
             Container(
               padding: const EdgeInsets.all(20),

lib/shared/providers/amount_format_provider.dart

@@ -0,0 +1,25 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import '../../core/constants.dart';
+
+class AmountFormatNotifier extends StateNotifier<AmountFormat> {
+  AmountFormatNotifier() : super(AmountFormat.commasDot) {
+    _load();
+  }
+
+  void _load() async {
+    final prefs = await SharedPreferences.getInstance();
+    final index = prefs.getInt('amount_format') ?? 0;
+    state = AmountFormat.values[index];
+  }
+
+  void set(AmountFormat format) async {
+    final prefs = await SharedPreferences.getInstance();
+    state = format;
+    await prefs.setInt('amount_format', format.index);
+  }
+}
+
+final amountFormatProvider = StateNotifierProvider<AmountFormatNotifier, AmountFormat>(
+  (ref) => AmountFormatNotifier(),
+);

lib/shared/utils/currency_utils.dart

@@ -1,9 +1,9 @@
-String formatAmount(String symbol, double amount) {
+import '../../core/constants.dart';
+
+String formatAmount(String symbol, double amount, AmountFormat fmt) {
   // Symbols that need a space after them (prefix symbols like Br, ₽ etc.)
   const spaceAfter = {'Br', '₽'};
-  final formatted = amount.toStringAsFixed(2);
-  if (spaceAfter.contains(symbol)) {
-    return '$symbol $formatted';
-  }
-  return '$symbol$formatted';
+  final formatted = fmt.format(amount);
+  final sep = spaceAfter.contains(symbol) ? ' ' : '';
+  return '$symbol$sep$formatted';
 }