feat(wms): 增加库位拆分前的占用状态校验

- 在拆分逻辑中增加对父库位占用状态的批量校验
- 若父库位被占用则抛出明确提示异常
- 优化库位拆分与合并时的子库位查询逻辑
- 统一处理拆分与合并操作中的空子库位判断
- 调整代码结构，增强可读性与维护性

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

@@ -455,15 +455,34 @@ public class WmsActualWarehouseServiceImpl implements IWmsActualWarehouseService
             throw new ServiceException("未找到列标识为 " + columnFlag + " 的库位");
         }
 
+        // 1. 筛选出待拆分的父库位（只校验需要拆分的库位，非拆分库位不限制）
+        List<WmsActualWarehouse> toSplitParents = columnLocations.stream()
+            .filter(loc -> splitIds.contains(loc.getActualWarehouseId()))
+            .collect(Collectors.toList());
+
+        // 2. 批量校验占用状态
+        List<String> occupiedCodes = new ArrayList<>();
+        for (WmsActualWarehouse parent : toSplitParents) {
+            // 锁定状态=0 → 被占用
+            boolean isOccupied = parent.getIsEnabled() != null && parent.getIsEnabled() == 0;
+            if (isOccupied) {
+                occupiedCodes.add(parent.getActualWarehouseCode());
+            }
+        }
+
+        // 3. 存在被占用的父库位，抛出异常提示
+        if (!occupiedCodes.isEmpty()) {
+            throw new ServiceException("以下父库位被占用，无法拆分：" + String.join(",", occupiedCodes));
+        }
         // 批量查询所有子库位（一次性查询，避免循环查询）
         List<Long> parentIds = columnLocations.stream()
             .map(WmsActualWarehouse::getActualWarehouseId)
             .collect(Collectors.toList());
-        
+
         List<WmsActualWarehouse> allChildren = baseMapper.selectList(Wrappers.<WmsActualWarehouse>lambdaQuery()
             .in(WmsActualWarehouse::getParentId, parentIds)
             .eq(WmsActualWarehouse::getActualWarehouseType, 4)); // 四级子库位
-        
+
         boolean hasExistingChildren = CollUtil.isNotEmpty(allChildren);
 
         if (hasExistingChildren) {
@@ -498,11 +517,11 @@ public class WmsActualWarehouseServiceImpl implements IWmsActualWarehouseService
             .collect(Collectors.groupingBy(WmsActualWarehouse::getParentId, LinkedHashMap::new, Collectors.toList()));
 
         List<WmsActualWarehouse> toUpdate = new ArrayList<>();
-        
+
         for (WmsActualWarehouse location : columnLocations) {
             boolean isSplitLocation = splitIds.contains(location.getActualWarehouseId());
             List<WmsActualWarehouse> children = childrenByParent.get(location.getActualWarehouseId());
-            
+
             if (CollUtil.isEmpty(children)) {
                 continue;
             }
@@ -536,7 +555,7 @@ public class WmsActualWarehouseServiceImpl implements IWmsActualWarehouseService
                 }
             }
         }
-        
+
         // 批量更新
         if (!toUpdate.isEmpty()) {
             baseMapper.updateBatchById(toUpdate);
@@ -693,7 +712,7 @@ public class WmsActualWarehouseServiceImpl implements IWmsActualWarehouseService
         List<Long> parentIds = locationsToMerge.stream()
             .map(WmsActualWarehouse::getActualWarehouseId)
             .collect(Collectors.toList());
-        
+
         List<WmsActualWarehouse> allChildren = baseMapper.selectList(Wrappers.<WmsActualWarehouse>lambdaQuery()
             .in(WmsActualWarehouse::getParentId, parentIds)
             .eq(WmsActualWarehouse::getActualWarehouseType, 4)); // 四级子库位
@@ -721,7 +740,7 @@ public class WmsActualWarehouseServiceImpl implements IWmsActualWarehouseService
 
         for (WmsActualWarehouse location : locationsToMerge) {
             List<WmsActualWarehouse> children = childrenByParent.get(location.getActualWarehouseId());
-            
+
             // 隐藏所有子库位
             if (CollUtil.isNotEmpty(children)) {
                 for (WmsActualWarehouse child : children) {