Production-Ready E2EE Collaborative Writing Platform with Real-Time Sync

Production-ready collaborative writing workspace with end-to-end encryption and real-time multiplayer editing. Built on React 19, Next.js 16, and Yjs CRDTs with client-side Web Crypto API for zero-knowledge security. Features conflict-free collaboration, granular access controls, suggestion mode with tracked changes, threaded comments, and encrypted chat. Designed for high-security environments like legal documents, medical records, and corporate knowledge bases.