feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/workflow/engine/handlers/copy_handler.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+抄送节点处理器
+处理抄送任务的创建
+"""
+import logging
+from typing import Dict, TYPE_CHECKING
+
+from online_dev.workflow.engine.handlers.base_handler import BaseNodeHandler
+
+if TYPE_CHECKING:
+    from online_dev.workflow.engine.base import ExecutionContext
+
+logger = logging.getLogger(__name__)
+
+
+class CopyHandler(BaseNodeHandler):
+    """
+    抄送节点处理器
+    
+    抄送节点创建抄送任务后自动推进到下一节点
+    """
+
+    async def execute(self, context: 'ExecutionContext', node: Dict) -> None:
+        """
+        执行抄送节点：创建抄送任务并继续推进
+        """
+        from online_dev.workflow.engine.assignee_resolver import assignee_resolver
+
+        node_config = self.get_node_config(node)
+
+        # 解析抄送人
+        assignee_ids = await assignee_resolver.resolve(
+            context.db,
+            node_config,
+            context.instance,
+            context.form_data,
+        )
+
+        logger.info(f"创建抄送任务 - 节点: {self.get_node_id(node)}, 抄送人数: {len(assignee_ids)}")
+
+        # 创建抄送任务
+        for assignee_id in assignee_ids:
+            await self.create_task(context, node, assignee_id, 'copy')
+
+        # 记录抄送日志（系统自动执行，不关联用户）
+        await self.create_log(
+            context, node, 'copy',
+            comment=f'抄送给 {len(assignee_ids)} 人',
+            extra_data={
+                'assignee_ids': assignee_ids,
+            },
+            operator_id='',
+        )
+
+        # 抄送后继续推进（不等待）
+        await self.advance_to_next(context, node)