fix 处理传入日期的开始时间

Src/Dlhis.Canteen/Order/Services/Implements/BalanceService.cs

@@ -72,7 +72,7 @@ public class BalanceService : IBalanceService
         if (request.SearchDate.HasValue)
         {
             now = request.SearchDate.Value;
-            start = new DateTime(now.Year, now.Month, now.Day, 0, 0, 1);
+            start = new DateTime(now.Year, now.Month, now.Day);
             end = new DateTime(now.Year, now.Month, now.Day, 23, 59, 59);
         }