test: fix py3.8 type issues (typing.List, guard Optional stt indexing)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: plutoless

tests/custom/test_regional_vendors.py

@@ -59,6 +59,7 @@ def test_cn_client_allows_global_only_vendor() -> None:
         DeepgramSTT(api_key="dg-key", model="nova-2", language="en-US")
     )
     assert agent.__class__.__name__ == "CNAgent"
+    assert agent.stt is not None
     assert agent.stt["vendor"] == "deepgram"
 
 
@@ -69,6 +70,7 @@ def test_global_client_allows_cn_only_vendor() -> None:
     )
     agent = Agent(client=client).with_stt(tencent_stt)
     assert agent.__class__.__name__ == "GlobalAgent"
+    assert agent.stt is not None
     assert agent.stt["vendor"] == "tencent"
 
 

tests/custom/test_sensetime_avatar.py

@@ -1,5 +1,6 @@
 import pytest
 from types import SimpleNamespace
+from typing import Any, Dict, List
 
 from agora_agent.agentkit import Agent, AgentSession, validate_avatar_config
 from agora_agent.agentkit.avatar_types import is_sensetime_avatar
@@ -35,7 +36,7 @@ def _session(agent):
     )
 
 
-def _scene_list() -> list[dict]:
+def _scene_list() -> List[Dict[str, Any]]:
     return [{"digital_role": {"face_feature_id": "role-1"}}]