feat(warehouse): 实现一级库位的多级子节点查询功能

- 当库位类型为一级时，查询其所有二级子节点
- 对每个二级节点递归调用queryList获取有效最小层级库位
- 支持三级未拆分或四级库位的完整查询路径
- 返回所有子节点的ID列表，完善库位层级管理逻辑

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

@@ -576,6 +576,33 @@ public class WmsMaterialCoilServiceImpl implements IWmsMaterialCoilService {
         }
 
         Long warehouseType = warehouse.getActualWarehouseType();
+        // 当为一级库位：查询其所有二级子节点，然后对每个二级节点调用 queryList 获取有效的最小层级库位（三级未拆分或四级）
+        if (warehouseType != null && warehouseType == 1L) {
+            WmsActualWarehouseBo level2Bo = new WmsActualWarehouseBo();
+            level2Bo.setParentId(actualWarehouseId);
+            List<WmsActualWarehouseVo> level2List = actualWarehouseService.queryList(level2Bo);
+            if (level2List == null || level2List.isEmpty()) {
+                return new ArrayList<>();
+            }
+            List<Long> resultIds = new ArrayList<>();
+            for (WmsActualWarehouseVo level2 : level2List) {
+                if (level2 == null || level2.getActualWarehouseId() == null) {
+                    continue;
+                }
+                WmsActualWarehouseBo childBo = new WmsActualWarehouseBo();
+                childBo.setParentId(level2.getActualWarehouseId());
+                List<WmsActualWarehouseVo> children = actualWarehouseService.queryList(childBo);
+                if (children != null && !children.isEmpty()) {
+                    for (WmsActualWarehouseVo ch : children) {
+                        Long id = ch.getActualWarehouseId();
+                        if (id != null) {
+                            resultIds.add(id);
+                        }
+                    }
+                }
+            }
+            return resultIds;
+        }
         // 三级/四级库位：直接返回自身ID（无下级）
         if (warehouseType != null && (warehouseType == 3L || warehouseType == 4L)) {
             return Collections.singletonList(actualWarehouseId);