Ports the animated OpenClawMascotView to the macOS app: the About pane
icon and the onboarding hero now render the Canvas+TimelineView mascot
(float/blink/antenna-wiggle/claw-snap, still under Reduce Motion)
instead of the static app icon.
The view moves from apps/ios into the shared OpenClawChatUI target of
OpenClawKit so iOS and macOS consume one copy; the iOS lint filelist
tracks the moved file.
f052a2f23b