fix: register Cairo converter for bundled overlay

src/titletimer/overlay.py

@@ -5,12 +5,14 @@ import math
 from pathlib import Path
 from time import monotonic
 
-import cairo
 import gi
 
+gi.require_foreign("cairo")
 gi.require_version("Gtk", "4.0")
 gi.require_version("GdkPixbuf", "2.0")
 
+import cairo
+
 from gi.repository import Gdk, GdkPixbuf, GLib, Gtk  # noqa: E402
 
 logger = logging.getLogger(__name__)

tests/test_branding.py

@@ -31,6 +31,11 @@ class BrandingTests(unittest.TestCase):
         self.assertIn('application_id="dev.korintimer.settings"', main_module)
         self.assertIn('application_id="dev.korintimer.overlay"', main_module)
 
+    def test_overlay_registers_the_cairo_foreign_converter(self) -> None:
+        overlay_module = (ROOT / "src" / "titletimer" / "overlay.py").read_text()
+
+        self.assertIn('gi.require_foreign("cairo")', overlay_module)
+
 
 if __name__ == "__main__":
     unittest.main()