fix(workflow): 修复跨天班次考勤检查逻辑

- 修改 isBackwardCrossDay 方法中判断条件，使用 ShiftEndTime 替代 ShiftStartTime 进行小时比较
- 更新 backward 标志位计算逻辑，统一使用 et 变量进行小时数判断
- 修正跨天班次的判断阈值从 16 点调整为 12 点

klp-wms/src/main/java/com/klp/service/impl/WmsAttendanceCheckServiceImpl.java

@@ -149,8 +149,8 @@ public class WmsAttendanceCheckServiceImpl implements IWmsAttendanceCheckService
 
     private boolean isBackwardCrossDay(WmsAttendanceScheduleVo schedule) {
         if (!isCrossDayShift(schedule)) return false;
-        if (schedule.getShiftStartTime() == null || schedule.getShiftEndTime() == null) return false;
-        return toLocalTime(schedule.getShiftStartTime()).getHour() >= 16;
+        if (schedule.getShiftEndTime() == null) return false;
+        return toLocalTime(schedule.getShiftEndTime()).getHour() >= 12;
     }
 
     private WmsAttendanceRule getActiveRule() {
@@ -309,7 +309,7 @@ public class WmsAttendanceCheckServiceImpl implements IWmsAttendanceCheckService
         LocalDateTime windowStart;
         LocalDateTime windowEnd;
 
-        boolean backward = st != null && et != null && st.getHour() >= 16 && crossDay;
+        boolean backward = crossDay && et != null && et.getHour() >= 12;
 
         if (crossDay && backward) {
             windowStart = LocalDateTime.of(ld, et).minusHours(2);