Build an animated radial floating action button with spring physics. – Creates Canvas-based absolute positioning for FAB and expanding menu items – Implements liquid inertia physics using ElasticEase with oscillations and springiness – Uses staggered animation timing (50ms open delay, 30ms close delay) for cascade effect – Adds position-aware arc calculation adjusting angles based on corner placement – Builds pulse ring effect and trigger button rotation (plus to X) animations – Creates magnetic element attraction with distance-based force calculations – Implements DependencyProperty patterns with Items, Position, Intensity, AccentColor properties – Target platforms: Windows (Desktop), Android – Use Canvas with CompositeTransform, Storyboard with ElasticEase, DependencyProperty custom properties, ThemeShadow for elevation – Design with monochromatic theme, 500ms spring animations with 40ms stagger.