Enable screen reader and keyboard navigation via PixiJS's AccessibilitySystem. The system creates an invisible shadow DOM overlay positioned over accessible containers so assistive technology can discover and activate them. Quick Start Related skills: (pointer/tap handlers), (HTML elements on canvas), (init options). Key points: - By default the system activates only after the user presses Tab. Set in Application init for immediate activation. - On mobile, the system creates a hidden touch hook; screen-reader focus activates accessibility for the whole session. - The AccessibilitySystem requi…