fix (farm): 物种库维护

- 新增 物种库二级树

yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/service/specieslibrary/SpeciesLibraryServiceImpl.java

@@ -384,11 +384,16 @@ public class SpeciesLibraryServiceImpl implements SpeciesLibraryService {
         wrapperX.orderByDesc(TwoDictDO::getId);
         List<TwoDictDO> allDicts = twoDictMapper.selectList(wrapperX);
 
+        List<TwoDictDO> matchedDicts = null;
+        if (req.getName() != null) {
             // 查找匹配的节点
-        List<TwoDictDO> matchedDicts = allDicts.stream().filter(dict -> dict.getName().equals(req.getName())).collect(Collectors.toList());
+            matchedDicts = allDicts.stream().filter(dict -> dict.getName().equals(req.getName())).collect(Collectors.toList());
             if (matchedDicts.isEmpty()) {
                 return Collections.emptyList();
             }
+        } else {
+             matchedDicts = allDicts;
+        }
 
         // 构建完整的树结构用于查询
         List<SpeciesTwoLevelTreeRespVO> fullTree = buildTree(allDicts);