test(shell): use single import style for ui.shell in silent-update test

Author: elkaix

tests/ui_and_conv/test_silent_auto_update.py

@@ -14,19 +14,18 @@
 from pythinker_code.soul.agent import Agent, Runtime
 from pythinker_code.soul.context import Context
 from pythinker_code.soul.pythinkersoul import PythinkerSoul
-from pythinker_code.ui.shell import Shell
 from pythinker_code.ui.shell.update import UpdateResult
 
 
-def _make_shell(runtime: Runtime, tmp_path: Path) -> Shell:
+def _make_shell(runtime: Runtime, tmp_path: Path) -> shell_module.Shell:
     agent = Agent(
         name="Test Agent",
         system_prompt="Test system prompt.",
         toolset=EmptyToolset(),
         runtime=runtime,
     )
     soul = PythinkerSoul(agent, context=Context(file_backend=tmp_path / "history.jsonl"))
-    return Shell(soul)
+    return shell_module.Shell(soul)
 
 
 @pytest.fixture