feat(annotation): 添加 labelConfig 字段并优化配置解析逻辑

- 在 DatasetMappingResponse 模型中新增 label_config 字段
- 修改前端获取 labelConfig 的逻辑，优先使用任务自身配置
- 移除模板配置的 condition 分支，统一从 XML 解析配置
- 更新后端服务从 configuration JSON 字段中提取 label_config 和 description
- 优化前后端配置解析的一致性处理

runtime/datamate-python/app/module/annotation/schema/mapping.py

@@ -48,10 +48,11 @@ class DatasetMappingResponse(BaseModel):
     description: Optional[str] = Field(None, description="标注项目描述")
     template_id: Optional[str] = Field(None, alias="templateId", description="关联的模板ID")
     template: Optional['AnnotationTemplateResponse'] = Field(None, description="关联的标注模板详情")
+    label_config: Optional[str] = Field(None, alias="labelConfig", description="实际使用的 Label Studio XML 配置")
     created_at: datetime = Field(..., alias="createdAt", description="创建时间")
     updated_at: Optional[datetime] = Field(None, alias="updatedAt", description="更新时间")
     deleted_at: Optional[datetime] = Field(None, alias="deletedAt", description="删除时间")
-    
+
     class Config:
         from_attributes = True
         populate_by_name = True

runtime/datamate-python/app/module/annotation/service/mapping.py

@@ -35,23 +35,28 @@ class DatasetMappingService:
         )
     
     async def _to_response_from_row(
-        self, 
-        row, 
+        self,
+        row,
         include_template: bool = False
     ) -> DatasetMappingResponse:
         """
         Convert query row (mapping + dataset_name) to response
-        
+
         Args:
             row: Query result row containing (LabelingProject, dataset_name)
             include_template: If True, fetch and include full template details
         """
         mapping = row[0]  # LabelingProject object
         dataset_name = row[1]  # dataset_name from join
-        
+
         # Get template_id from mapping
         template_id = getattr(mapping, 'template_id', None)
-        
+
+        # 从 configuration JSON 字段中提取 label_config 和 description
+        configuration = getattr(mapping, 'configuration', None) or {}
+        label_config = configuration.get('label_config') if isinstance(configuration, dict) else None
+        description = configuration.get('description') if isinstance(configuration, dict) else None
+
         # Optionally fetch full template details
         template_response = None
         if include_template and template_id:
@@ -59,31 +64,32 @@ class DatasetMappingService:
             template_service = AnnotationTemplateService()
             template_response = await template_service.get_template(self.db, template_id)
             logger.debug(f"Included template details for template_id: {template_id}")
-        
+
         response_data = {
             "id": mapping.id,
             "dataset_id": mapping.dataset_id,
             "dataset_name": dataset_name,
             "labeling_project_id": mapping.labeling_project_id,
             "name": mapping.name,
-            "description": getattr(mapping, 'description', None),
+            "description": description,
             "template_id": template_id,
             "template": template_response,
+            "label_config": label_config,
             "created_at": mapping.created_at,
             "updated_at": mapping.updated_at,
             "deleted_at": mapping.deleted_at,
         }
-        
+
         return DatasetMappingResponse(**response_data)
     
     async def _to_response(
-        self, 
-        mapping: LabelingProject, 
+        self,
+        mapping: LabelingProject,
         include_template: bool = False
     ) -> DatasetMappingResponse:
         """
         Convert ORM model to response with dataset name (for single entity operations)
-        
+
         Args:
             mapping: LabelingProject ORM object
             include_template: If True, fetch and include full template details
@@ -96,10 +102,15 @@ class DatasetMappingService:
                 select(Dataset.name).where(Dataset.id == dataset_id)
             )
             dataset_name = dataset_result.scalar_one_or_none()
-        
+
         # Get template_id from mapping
         template_id = getattr(mapping, 'template_id', None)
-        
+
+        # 从 configuration JSON 字段中提取 label_config 和 description
+        configuration = getattr(mapping, 'configuration', None) or {}
+        label_config = configuration.get('label_config') if isinstance(configuration, dict) else None
+        description = configuration.get('description') if isinstance(configuration, dict) else None
+
         # Optionally fetch full template details
         template_response = None
         if include_template and template_id:
@@ -107,7 +118,7 @@ class DatasetMappingService:
             template_service = AnnotationTemplateService()
             template_response = await template_service.get_template(self.db, template_id)
             logger.debug(f"Included template details for template_id: {template_id}")
-        
+
         # Create response dict with all fields
         response_data = {
             "id": mapping.id,
@@ -115,14 +126,15 @@ class DatasetMappingService:
             "dataset_name": dataset_name,
             "labeling_project_id": mapping.labeling_project_id,
             "name": mapping.name,
-            "description": getattr(mapping, 'description', None),
+            "description": description,
             "template_id": template_id,
             "template": template_response,
+            "label_config": label_config,
             "created_at": mapping.created_at,
             "updated_at": mapping.updated_at,
             "deleted_at": mapping.deleted_at,
         }
-        
+
         return DatasetMappingResponse(**response_data)
     
     async def create_mapping(