fix 补充小于等于零不可操作

Src/Dlhis.Basic/Organization/Services/Implements/GainfoMealService.cs

@@ -75,10 +75,7 @@ public class GainfoMealService : IGainfoMealService
         gainfoLeave.ThrowIfNull("需要对已离职人员迁移");
 
         var beforeBalance = await _dbContext.Queryable<GainfoMealEntity>().Where(x => x.UserCode == request.BeforeCode).Select(x => x.Balance).SingleAsync();
-        if (beforeBalance == 0)
-        {
-            return;
-        }
+        (beforeBalance <= 0).ThrowIfTrue("不可操作,余额不足");
 
         var now = DateTime.Now;
 

Src/Dlhis.Entity/Canteen/Enums/BalanceRecordSourceEnumType.cs

@@ -69,6 +69,6 @@ public enum BalanceRecordSourceEnumType
     /// <summary>
     /// 余额写入
     /// </summary>
-    [Description("余额写入")]
+    [Description("余额迁移")]
     BalanceMigration,
 }