fix 描述处理

Src/Dlhis.Basic/WorkGrids/Services/Implements/WorkGridService.cs

@@ -267,7 +267,9 @@ public class WorkGridService : IWorkGridService
         var userCount = await _dbContext.Queryable<WorkGridUserEntity>().Where(x => x.WorkGridCode == myWorkGrid.Code).CountAsync();
         await _operateLog.LogAsync(OperateLogType.WorkGrid, $"分配人员到网格({myWorkGrid.Name}),人员:{dataToInserts.Select(x => x.UserCode).Join(",")}");
 
-        return $"{myWorkGrid.Name}人员{userCount}超出最大人数设置{myWorkGrid.MaxUserCount}";
+        return userCount > myWorkGrid.MaxUserCount 
+            ? $"{myWorkGrid.Name}人员{userCount}超出最大人数设置{myWorkGrid.MaxUserCount}" 
+            : null;
     }
 
     /// <inheritdoc />