feat:执行过程编排新建分支单节点删除和整个分支节点删除

backend/server.py

@@ -2508,6 +2508,114 @@ def handle_delete_task_process_branch(data):
         })
 
 
+@socketio.on('delete_task_process_node')
+def handle_delete_task_process_node(data):
+    """
+    WebSocket版本：删除任务过程分支中的单个节点
+
+    请求格式：
+    {
+        "id": "request-id",
+        "action": "delete_task_process_node",
+        "data": {
+            "task_id": "task-id",  // 大任务ID（数据库主键）
+            "stepId": "step-id",   // 小任务ID
+            "branchId": "branch-id", // 分支ID
+            "nodeId": "node-id"    // 要删除的节点ID
+        }
+    }
+    """
+    request_id = data.get('id')
+    incoming_data = data.get('data', {})
+    task_id = incoming_data.get('task_id')
+    step_id = incoming_data.get('stepId')
+    branch_id = incoming_data.get('branchId')
+    node_id = incoming_data.get('nodeId')
+    edges = incoming_data.get('edges', [])  # 更新后的 edges 数据
+
+    if not task_id or not step_id or not branch_id or not node_id:
+        emit('response', {
+            'id': request_id,
+            'status': 'error',
+            'error': '缺少必要参数：task_id, stepId, branchId, nodeId'
+        })
+        return
+
+    try:
+        with get_db_context() as db:
+            # 获取现有的 branches 数据
+            existing_task = MultiAgentTaskCRUD.get_by_id(db, task_id)
+
+            if existing_task:
+                # 使用深拷贝避免修改共享引用
+                existing_branches = copy.deepcopy(existing_task.branches) if existing_task.branches else {}
+
+                if isinstance(existing_branches, dict):
+                    # 获取现有的 task_process_branches
+                    task_process_branches = existing_branches.get('task_process_branches', {})
+
+                    if step_id in task_process_branches:
+                        step_branches = task_process_branches[step_id]
+
+                        # 遍历所有 agentGroupKey 下的分支
+                        for agent_key, branches_list in step_branches.items():
+                            if isinstance(branches_list, list):
+                                for branch in branches_list:
+                                    if branch.get('id') == branch_id:
+                                        # 找到目标分支，删除指定的节点
+                                        nodes = branch.get('nodes', [])
+                                        tasks = branch.get('tasks', [])
+
+                                        # 找到并删除节点
+                                        for i, node in enumerate(nodes):
+                                            if node.get('id') == node_id:
+                                                nodes.pop(i)
+                                                if i < len(tasks):
+                                                    tasks.pop(i)
+                                                break
+
+                                        # 更新分支数据（包括 nodes, tasks, edges）
+                                        branch['nodes'] = nodes
+                                        branch['tasks'] = tasks
+                                        branch['edges'] = edges  # 使用前端传入的更新后的 edges
+                                        break
+
+                        # 更新 branches 数据
+                        existing_branches['task_process_branches'] = task_process_branches
+
+                        # 直接更新数据库
+                        existing_task.branches = existing_branches
+                        db.flush()
+                        db.commit()
+
+                        print(f"[delete_task_process_node] 删除成功，task_id={task_id}, step_id={step_id}, branch_id={branch_id}, node_id={node_id}")
+
+                        emit('response', {
+                            'id': request_id,
+                            'status': 'success',
+                            'data': {
+                                "message": "节点删除成功",
+                                "deleted_node_id": node_id
+                            }
+                        })
+                        return
+
+            # 如果找不到对应的节点
+            print(f"[delete_task_process_node] 警告: 找不到要删除的节点，task_id={task_id}, step_id={step_id}, branch_id={branch_id}, node_id={node_id}")
+            emit('response', {
+                'id': request_id,
+                'status': 'error',
+                'error': '未找到要删除的节点'
+            })
+
+    except Exception as e:
+        emit('response', {
+            'id': request_id,
+            'status': 'error',
+            'error': str(e)
+        })
+
+
 @socketio.on('save_task_outline')
 def handle_save_task_outline(data):
     """