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

tests/test_gui_phase3.py

@@ -1,10 +1,8 @@
 import os
 import json
 from pathlib import Path
-from unittest.mock import MagicMock, patch
-import pytest
+from unittest.mock import patch
 
-from gui_2 import App
 
 def test_track_proposal_editing(app_instance):
  # Setup some proposed tracks