SettingsView owns its navigation stack, so pushing it onto a section's
stack rendered nothing. Select the Settings section where the layout has
one, otherwise present Home's settings sheet; open the Settings window on
macOS.
Route HTTPS YouTube URLs through yattee://open?url= scheme since simctl
can't trigger Universal Links. Improve wait strategies: use player
expansion check for video tests, tree length threshold for channel/
playlist content loading. Add retry logic to cleanup_after_video.
Test yattee:// custom scheme URLs navigate to correct screens:
playlists, bookmarks, history, downloads, channels, subscriptions,
continue-watching, and search. Handles iOS system confirmation dialog
via coordinate taps since it's invisible to AXe. Settings deep link
is excluded (known app bug - doesn't render when pushed to nav stack).
