refactor(tests): Add strict type hints to sixth batch of test files

tests/test_hooks.py

@@ -23,7 +23,7 @@ def test_hooks_disabled_by_default() -> None:
   app = gui_legacy.App()
   assert getattr(app, 'test_hooks_enabled', False) is False
 
-def test_live_hook_server_responses(live_gui):
+def test_live_hook_server_responses(live_gui) -> None:
  """
     Verifies the live hook server (started via fixture) responds correctly to all major endpoints.
     """