feat(types): Complete strict static analysis and typing track

tests/test_gui_updates.py

@@ -1,4 +1,3 @@
-import pytest
 from unittest.mock import patch
 import sys
 import os
@@ -41,7 +40,7 @@ def test_performance_history_updates(app_instance: Any) -> None:
 def test_gui_updates_on_event(app_instance: App) -> None:
  mock_stats = {"percentage": 50.0, "current": 500, "limit": 1000}
  app_instance.last_md = "mock_md"
- with patch('ai_client.get_token_stats', return_value=mock_stats) as mock_get_stats:
+ with patch('ai_client.get_token_stats', return_value=mock_stats):
   app_instance._on_api_event(payload={"text": "test"})
   app_instance._process_pending_gui_tasks()
   assert app_instance._token_stats["percentage"] == 50.0