4f33255417
- SignageManager.kt: Handles URL rotation with configurable interval - Admin UI: Toggle, URL list (one per line), interval setting - SignageManagerTest.kt: 9 unit tests for rotation logic Features: - Enable/disable signage mode - Configure list of URLs to rotate - Set rotation interval (min 5 seconds) - Pauses on user interaction (resumes after 1 min) - Resets to first URL on idle timeout Note: MainActivity integration pending