* fix(macos): stop Canvas presents from stealing focus
Agent-driven canvas.present/canvas.navigate activated the app with
NSApp.activate(ignoringOtherApps:), yanking keyboard focus from
whatever the user was doing. The Canvas panel's elevated window level
already keeps it visible without app activation, and user entry points
(AppNavigationActions) activate explicitly, so presentation now orders
the panel front without switching apps.
* fix(macos): order Canvas front without taking key focus
* fix(macos): drop showWindow from Canvas window presentation
9a3231547b
