Fix stuff, apply ruff rules.

tests/test_notification_presenter_compat.py

@@ -0,0 +1,15 @@
+"""Compatibility tests for the notification presenter."""
+
+from __future__ import annotations
+
+import pytest
+
+from cthulhu import notification_presenter
+
+
+@pytest.mark.unit
+def test_get_presenter_alias_matches_legacy_get_presenter() -> None:
+    """The Mako monitor still uses the legacy camelCase singleton accessor."""
+
+    assert notification_presenter.getPresenter is notification_presenter.get_presenter
+    assert notification_presenter.getPresenter() is notification_presenter.get_presenter()