feat: auto-delete node folder when deleting LocalAiNode

- Override delete method in LocalAiNode to delete corresponding node folder
- Add _delete_node_folder helper function to remove node directory
- Import shutil module for directory removal
- Node folder at ai/nodes/{node_type}/ will be automatically deleted when node record is deleted

apps/jingrow/jingrow/ai/pagetype/local_ai_node/local_ai_node.py

@@ -4,6 +4,7 @@
 from typing import Dict, Any
 from pathlib import Path
 import json
+import shutil
 import jingrow
 from jingrow.model.page import Page
 from jingrow.utils.path import get_jingrow_root
@@ -36,6 +37,20 @@ class LocalAiNode(Page):
 				if updated_data.get('node_type'):
 					_sync_node_to_json_file(updated_data)
 		return result
+	
+	def delete(self, name: str) -> Dict[str, Any]:
+		"""删除节点记录，并删除对应的节点文件夹"""
+		# 在删除前获取节点数据，以便删除对应的文件夹
+		node_res = self.get(name)
+		if node_res.get('success'):
+			node_data = node_res.get('data', {})
+			node_type = node_data.get('node_type')
+			if node_type:
+				# 删除节点文件夹
+				_delete_node_folder(node_type)
+		
+		# 调用父类的 delete 方法删除记录
+		return super().delete(name)
 
 
 def _sync_node_to_json_file(node_data: Dict[str, Any]) -> bool:
@@ -121,3 +136,35 @@ def _sync_node_to_json_file(node_data: Dict[str, Any]) -> bool:
 		# 静默失败，不影响主流程
 		jingrow.log_error("同步节点到 JSON 文件失败", str(e), exc=e)
 		return False
+
+
+def _delete_node_folder(node_type: str) -> bool:
+	"""
+	删除节点文件夹（LocalAiNode 类的辅助函数）
+	当删除 Local Ai Node 时，自动删除对应的节点文件夹
+	
+	Args:
+		node_type: 节点类型，对应文件夹名称
+		
+	Returns:
+		bool: 删除是否成功
+	"""
+	try:
+		if not node_type:
+			return False
+		
+		# 获取节点目录路径
+		jingrow_root = get_jingrow_root()
+		nodes_root = jingrow_root / "ai" / "nodes"
+		node_dir = nodes_root / node_type
+		
+		# 如果文件夹存在，则删除
+		if node_dir.exists() and node_dir.is_dir():
+			shutil.rmtree(node_dir)
+			return True
+		
+		return False
+	except Exception as e:
+		# 静默失败，不影响主流程
+		jingrow.log_error("删除节点文件夹失败", str(e), exc=e)
+		return False