I have an existing deployment of the OnlyOffice Web Developer version and now need it extended so that it communicates seamlessly with my own backend while unlocking three AI-driven capabilities: AI润色, AI写作, and real-time AI结果流式输出. JavaScript will be the language of choice for every layer of this secondary development. The work centres on modifying OnlyOffice’s front-end code and hooking into its SDK so that each document action can call my backend endpoints, receive streamed responses, and render them live inside the editor. All UI elements, context-menu items, and toolbar buttons required for these features should feel native to OnlyOffice. Connection security, token handling, and error states also need to be covered. Deliverables • Updated OnlyOffice front-end source and build scripts in JavaScript • Integration logic that calls my backend for the three AI functions and handles WebSocket/HTTP streaming for continuous output • Clear setup instructions plus a brief technical note explaining where to extend for future AI features Completion is needed ASAP; please keep your schedule flexible for quick iterations and prompt reviews.