fix

Application/Dto/Statistics/StatisticsDto.cs

@@ -0,0 +1,20 @@
+namespace Application.Dto.Statistics;
+
+/// <summary>
+/// 余额统计DTO
+/// </summary>
+public record BalanceStatisticsDto(
+    int Day,
+    decimal CumulativeBalance
+);
+
+/// <summary>
+/// 每日统计DTO
+/// </summary>
+public record DailyStatisticsDto(
+    int Day,
+    int Count,
+    decimal Expense,
+    decimal Income,
+    decimal Saving
+);