refactor(workflow): enforce typed query boundary

tests/test_workflow_actions.py

@@ -3,7 +3,7 @@ from types import SimpleNamespace
 from app.schemas.download import DownloadTask
 from app.schemas.file import FileItem
 from app.schemas.workflow import ActionContext, ActionResult
-from app.workflow import WorkFlowManager
+from app.workflow import WorkflowManager
 from app.workflow.actions import BaseAction
 from app.workflow.actions import fetch_downloads as fetch_downloads_module
 from app.workflow.actions import fetch_torrents as fetch_torrents_module
@@ -239,7 +239,7 @@ def test_execute_with_inputs_maps_contract_inputs_outputs_and_runtime(monkeypatc
 
 def test_workflow_manager_list_actions_exposes_contract():
     """动作列表应返回固定输入输出契约。"""
-    manager = object.__new__(WorkFlowManager)
+    manager = object.__new__(WorkflowManager)
     manager._actions = {"FetchRssAction": FetchRssAction}
 
     actions = manager.list_actions()