chore: apply ruff auto-fixes and remove dead AST scripts

tests/test_gui_performance_requirements.py

@@ -1,4 +1,3 @@
-import pytest
 import time
 import sys
 import os
@@ -36,7 +35,7 @@ def test_idle_performance_requirements(live_gui) -> None:
    assert frame_time < 33.3, f"Frame time {frame_time}ms exceeds 30fps threshold"
  
  if valid_ft_count == 0 or total_ft == 0:
-  print(f"[Warning] Frame time is 0.0. This is expected in headless CI/CD environments.")
+  print("[Warning] Frame time is 0.0. This is expected in headless CI/CD environments.")
  print(f"[Test] Valid frame time samples: {valid_ft_count}/5")
  # In some CI environments without a real display, frame time might remain 0
  # but we've verified the hook is returning the dictionary.