refactor(dataset): 优化数据集路径管理和关联关系处理

- 移除Dataset类中initCreateParam方法的parentPath参数
- 简化handleParentChange方法中的路径构建逻辑
- 更新错误消息将"子数据集"改为"关联数据集"
- 修改前端界面将"父数据集"相关术语统一为"关联数据集"
- 在导入配置组件中添加类型定义和改进文件处理逻辑
- 限制数据源选项排除COLLECTION类型避免错误选择

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/DatasetApplicationService.java

@@ -73,7 +73,7 @@ public class DatasetApplicationService {
         Dataset dataset = DatasetConverter.INSTANCE.convertToDataset(createDatasetRequest);
         Dataset parentDataset = resolveParentDataset(createDatasetRequest.getParentDatasetId(), dataset.getId());
         dataset.setParentDatasetId(parentDataset == null ? null : parentDataset.getId());
-        dataset.initCreateParam(datasetBasePath, parentDataset == null ? null : parentDataset.getPath());
+        dataset.initCreateParam(datasetBasePath);
         // 处理标签
         Set<Tag> processedTags = Optional.ofNullable(createDatasetRequest.getTags())
             .filter(CollectionUtils::isNotEmpty)
@@ -291,7 +291,9 @@ public class DatasetApplicationService {
 
     private void handleParentChange(Dataset dataset, String parentDatasetId) {
         String normalized = normalizeParentId(parentDatasetId);
-        if (Objects.equals(dataset.getParentDatasetId(), normalized)) {
+        String expectedPath = buildDatasetPath(datasetBasePath, dataset.getId());
+        if (Objects.equals(dataset.getParentDatasetId(), normalized)
+            && Objects.equals(dataset.getPath(), expectedPath)) {
             return;
         }
         long childCount = datasetRepository.countByParentId(dataset.getId());
@@ -299,8 +301,7 @@ public class DatasetApplicationService {
             throw BusinessException.of(DataManagementErrorCode.DATASET_HAS_CHILDREN);
         }
         Dataset parent = normalized == null ? null : resolveParentDataset(normalized, dataset.getId());
-        String newPath = buildDatasetPath(parent == null ? datasetBasePath : parent.getPath(), dataset.getId());
-        moveDatasetPath(dataset, newPath);
+        moveDatasetPath(dataset, expectedPath);
         dataset.setParentDatasetId(parent == null ? null : parent.getId());
     }
 

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/domain/model/dataset/Dataset.java

@@ -114,9 +114,9 @@ public class Dataset extends BaseEntity<String> {
         this.updatedAt = LocalDateTime.now();
     }
 
-    public void initCreateParam(String datasetBasePath, String parentPath) {
+    public void initCreateParam(String datasetBasePath) {
         this.id = UUID.randomUUID().toString();
-        String basePath = normalizeBasePath(parentPath != null && !parentPath.isBlank() ? parentPath : datasetBasePath);
+        String basePath = normalizeBasePath(datasetBasePath);
         this.path = basePath + File.separator + this.id;
         if (this.status == null) {
             this.status = DatasetStatusType.DRAFT;

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/exception/DataManagementErrorCode.java

@@ -42,9 +42,9 @@ public enum DataManagementErrorCode implements ErrorCode {
      */
     DIRECTORY_NOT_FOUND("data_management.0007", "目录不存在"),
     /**
-     * 存在子数据集
+     * 存在关联数据集
      */
-    DATASET_HAS_CHILDREN("data_management.0008", "存在子数据集，禁止删除或移动"),
+    DATASET_HAS_CHILDREN("data_management.0008", "存在关联数据集，禁止删除或移动"),
     /**
      * 数据集文件不存在
      */