rspace-online/backlog/tasks/task-7 - Real-time-presence-cursors.md

id	title	status	assignee	created_date	labels	dependencies	priority
task-7	Real-time presence cursors	To Do		2026-01-02 16:08	feature collaboration sync		medium

Description

Show other users cursors and selections in real-time:

• Broadcast cursor position via WebSocket presence messages
• Display colored cursor with username label
• Show selection highlight when user has shape selected
• Fade out cursors after inactivity
• Different cursor colors per user

WebSocket already handles presence messages (see server/index.ts line 221-235), needs client-side rendering.

Acceptance Criteria

• #1 Cursor position broadcasts on mousemove
• #2 Other users cursors visible with name labels
• #3 Selection state shared between users
• #4 Cursors fade after 5s inactivity