3139

Added

• Animated skin backgrounds — Orientation representations in info.json can now declare a backgroundAnimation block with type (frames/apng/gif), frames (array of filenames), fps, and loops. The new DeltaSkinBackgroundAnimation model is decoded by OrientationRepresentations. DeltaSkinView renders a DeltaSkinAnimatedBackgroundView beneath the game screen when a background animation is configured. Frame-sequence animations are driven by a TimelineView and pause when the app is backgrounded; .apng and .gif types display the first frame