Plugin API for Custom Animated Renderers

[RadiatorTwo]

Summary

Expose an API that allows plugins to provide animated content for buttons, screensavers, and side displays.

Goals

• Plugins can render dynamic animation frames.
• Plugins can define target FPS.
• Plugins can stop/pause animations cleanly.
• Plugins can update animations based on external state.

Example Use Cases

• Spotify now playing animation
• OBS recording status animation
• Hardware monitor dashboard
• Audio visualizer
• Game telemetry display
• Download/progress display

Acceptance Criteria

• Plugins can register an animated renderer.
• Plugins can define target FPS.
• Plugin animations are controlled by the central scheduler.
• Plugin animations are stopped safely when the plugin unloads.