update chart history

lib/screen/history_point/history_point_chart.dart

+import 'dart:math';
+
 import 'package:flutter/material.dart';
 import 'package:fl_chart/fl_chart.dart';
 import 'package:intl/intl.dart';
@@ -8,11 +10,13 @@ class MonthlyPointsChart extends StatelessWidget {
     super.key,
     required this.items,
     required this.date,
+    this.monthSummary,
     this.onPrevMonth,
     this.onNextMonth,
     this.onChangeDate,
   });
 
+  final MonthSummaryChartModel? monthSummary;
   final List<DaySummaryChartModel> items;
   final DateTime date;
   final VoidCallback? onPrevMonth;
@@ -23,8 +27,8 @@ class MonthlyPointsChart extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final parsed = _parseToDayMap(items, date);
+    print('items ${items.length}, parsed: $parsed');
     final daysInMonth = DateUtils.getDaysInMonth(date.year, date.month);
-    final total = parsed.values.fold<double>(0, (p, e) => p + e);
     final maxVal = (parsed.values.isEmpty ? 0 : parsed.values.reduce((a, b) => a > b ? a : b)).abs();
     final yMax = _niceMax(maxVal.toDouble());
     final yStep = _niceStep(yMax);
@@ -58,7 +62,7 @@ class MonthlyPointsChart extends StatelessWidget {
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
               Text(
-                _formatInt(total),
+                _formatInt(_toDouble(monthSummary?.rewardMonthTotal ?? '0')),
                 style: const TextStyle(
                   fontSize: 40,
                   fontWeight: FontWeight.w700,
@@ -190,11 +194,12 @@ class MonthlyPointsChart extends StatelessWidget {
       if (dt == null || dt.month != m || dt.year != y) continue;
 
       final reward = _toDouble(e.rewardDayTotal);
-      final redeem = _toDouble(e.redeemDayTotal);
-      final adjust = _toDouble(e.adjustDayTotal);
-      final val = reward - redeem + adjust;
-
-      map[dt.day] = (map[dt.day] ?? 0) + val; // gộp nếu trùng ngày
+      // final redeem = _toDouble(e.redeemDayTotal);
+      // final adjust = _toDouble(e.adjustDayTotal);
+      // final val = reward - redeem + adjust;
+      var val = (map[dt.day] ?? 0) + reward;
+      val = max(val, 0); // không âm
+      map[dt.day] = val; // gộp nếu trùng ngày
     }
     return map;
   }

lib/screen/history_point/history_point_screen.dart

@@ -54,6 +54,7 @@ class _HistoryPointScreenState extends State<HistoryPointScreen> {
                       SliverToBoxAdapter(
                         child: MonthlyPointsChart(
                           items: _viewModel.transactionSummary.value?.days ?? [],
+                          monthSummary: _viewModel.transactionSummary.value?.month,
                           date: _viewModel.selectedDate,
                           onPrevMonth: () => _viewModel.changeDate(true),
                           onNextMonth: () => _viewModel.changeDate(false),