feat: add persisted batch text testing

backend/services/brains/workflow_brain.py

@@ -214,7 +214,12 @@ class WorkflowBrain(BaseBrain):
         self._cfg = cfg
         self._runtime = runtime
         self._store = DynamicVariableStore.from_config(cfg)
-        self._tools = ToolExecutor(self._store, client_tools=runtime.client_tools)
+        self._tools = (
+            runtime.tool_executor_factory(self._store)
+            if runtime.tool_executor_factory is not None
+            else ToolExecutor(self._store, client_tools=runtime.client_tools)
+        )
+        self._tools.set_client_tools(runtime.client_tools)
         self._actions = ActionRunner(
             self._tools,
             is_session_ending=lambda: runtime.call_end.ending,
@@ -934,18 +939,28 @@ class WorkflowBrain(BaseBrain):
         """Build one platform-owned tool scoped to the active Agent node."""
         kind = system_tool_kind(tool.definition or {})
         if kind == "update_state":
-            return self._workflow_update_state_tool(
+            schema = self._workflow_update_state_tool(
                 tool,
                 node_id,
                 state_variable_names=state_variable_names,
             )
-        if kind == "skip_turn":
-            return self._workflow_skip_turn_tool(tool)
-        if kind == "request_human_handoff":
-            return self._workflow_handoff_tool(tool, node_id)
-        if kind == "end_conversation":
-            return self._workflow_end_conversation_tool(tool, node_id)
-        raise ValueError(f"系统工具 {tool.id} 缺少有效 kind")
+        elif kind == "skip_turn":
+            schema = self._workflow_skip_turn_tool(tool)
+        elif kind == "request_human_handoff":
+            schema = self._workflow_handoff_tool(tool, node_id)
+        elif kind == "end_conversation":
+            schema = self._workflow_end_conversation_tool(tool, node_id)
+        else:
+            raise ValueError(f"系统工具 {tool.id} 缺少有效 kind")
+
+        runtime = self._require_runtime()
+        if runtime.tool_executor_factory is None:
+            return schema
+
+        async def mock_system_tool(args, _flow_manager):
+            return await self._tools.execute(tool, dict(args or {}))
+
+        return replace(schema, handler=mock_system_tool)
 
     def _workflow_update_state_tool(
         self,