test(agent): tighten type annotations in step-retry tests

tests/unit/test_agent_loop.py

@@ -314,14 +314,16 @@ class TestParseNormalization:
 class TestStepLevelRetry:
     """LLM 瞬时异常的步级重试：可重试元组 / 退避 / fail-fast。"""
 
-    def _make_loop(self, chat_side_effects: list) -> AgentLoop:
+    def _make_loop(self, chat_side_effects: list[object]) -> AgentLoop:
         """构造 chat 按序抛异常/返回响应的 AgentLoop。"""
         llm = AsyncMock()
         llm.chat = AsyncMock(side_effect=chat_side_effects)
         return AgentLoop(llm=llm, max_steps=10)
 
     @pytest.mark.asyncio
-    async def test_transient_error_retried_then_succeeds(self, monkeypatch) -> None:
+    async def test_transient_error_retried_then_succeeds(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
         """SSL/超时瞬时异常按 20s/40s 退避重试，第三次成功 → finished。"""
         delays: list[float] = []
 
@@ -341,7 +343,9 @@ class TestStepLevelRetry:
         assert delays == [20.0, 40.0]
 
     @pytest.mark.asyncio
-    async def test_retry_exhausted_terminates_with_error(self, monkeypatch) -> None:
+    async def test_retry_exhausted_terminates_with_error(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
         """重试预算（首次 + 2 次）耗尽仍失败 → stop_reason=error。"""
 
         async def _fake_sleep(seconds: float) -> None:
@@ -354,7 +358,7 @@ class TestStepLevelRetry:
         assert loop._llm.chat.await_count == 3  # 首次 + 2 次重试
 
     @pytest.mark.asyncio
-    async def test_non_retryable_fails_fast(self, monkeypatch) -> None:
+    async def test_non_retryable_fails_fast(self, monkeypatch: pytest.MonkeyPatch) -> None:
         """非可重试异常不退避不重发，首次即终止 → stop_reason=error。"""
         sleep_mock = AsyncMock()
         monkeypatch.setattr("core.agent.loop.asyncio.sleep", sleep_mock)
@@ -365,7 +369,9 @@ class TestStepLevelRetry:
         assert loop._llm.chat.await_count == 1
 
     @pytest.mark.asyncio
-    async def test_exhaustion_raises_last_original_exception(self, monkeypatch) -> None:
+    async def test_exhaustion_raises_last_original_exception(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
         """耗尽语义窄测试：_call_llm_with_step_retry 耗尽后原样抛出最后一次异常。"""
 
         async def _fake_sleep(seconds: float) -> None: