test(skip): macOS-only Quick Action feature (context menu)

[curdriceaurora]

The TestMacOSQuickAction class in tests/integration/test_context_menu_macos.py is skipped on non-macOS because it tests a macOS-only Quick Action feature. Permanent platform limitation. Related: #1027.

[curdriceaurora]

Closing — permanent platform guard or optional dep skip. Correctly skipped in CI, no action needed.