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

tests/test_gui_diagnostics.py

@@ -1,5 +1,3 @@
-import pytest
-from unittest.mock import patch, MagicMock
 import sys
 import os
 from typing import Any
@@ -7,7 +5,6 @@ from typing import Any
 # Ensure project root is in path for imports
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
-from gui_2 import App
 
 def test_diagnostics_panel_initialization(app_instance: Any) -> None:
  assert "Diagnostics" in app_instance.show_windows