Add unit tests and test helpers (5 suites, 41 tests) and test npm scripts; introduce deviceStatusPush service and WS real-time device status push integration. Fix chatRelay to acknowledge connections (send `welcome`), and apply multiple web remote/rdclient fixes (video ack/timing, keyframe refresh, SourceBuffer trimming, input focus handling) to improve FPS and control. Add new server route file (system.routes.js), new device-status service, update server.js and package.json, and modify various frontend CSS/JS/views. Update English and Polish locale files with many new widget/i18n keys and remove the Russian locale file (ru.json). Also include assorted UI/desktop-widget dashboard tweaks and documentation status updates in .github/copilot-instructions.md.
UNITRONIX