feat:乐团课课酬调整

mec-biz/src/main/java/com/ym/mec/biz/service/impl/CourseScheduleTeacherSalaryServiceImpl.java

@@ -770,8 +770,10 @@ public class CourseScheduleTeacherSalaryServiceImpl extends BaseServiceImpl<Long
                 }
             }
 
+            BigDecimal finalSalary = teacherSalary.subtract(deductCost);
+
             //更新教师结算信息
-            courseScheduleTeacherSalary.setActualSalary(teacherSalary.subtract(deductCost));
+            courseScheduleTeacherSalary.setActualSalary(finalSalary.compareTo(BigDecimal.ZERO)<0?BigDecimal.ZERO:finalSalary);
             courseScheduleTeacherSalary.setSettlementTime(now);
             courseScheduleTeacherSalaryDao.update(courseScheduleTeacherSalary);
         }