Responsive Admin Chat App

I need a clean, minimalist admin-side chat application that runs smoothly in any modern browser and ships with a lightweight desktop build (Electron or similar is fine). Core features I must have: • User management so I can add, edit, suspend, and track users... (Budget: $15 - $25 USD, Jobs: AngularJS, CSS, Desktop Application, HTML, JavaScript, LAMP, Node.js, Web Development)