ED.1 Live TeamWork: follow the teacher (follow the presenter)

Owner 2026-11-03 (educator kit): "allow students to follow the teacher". Built in a Live TeamWork session (assets/js/live-follow.js, shared by every app that uses the live presence layer; CadCraft and MarkupCraft mount it from their own live UI). A person can choose Follow on another person's name and their view moves with the presenter's: 2D camera centre and zoom (a smaller window zooms out to show all of the leader's view), 3D eye, target, field of view and parallel height, and the sheet, storey or space when the app can open it. The host can press "Ask everyone to follow me"; each joiner can still step away. Following stops by itself when the follower pans, zooms or orbits on their own, and a chip names who they were following and offers to rejoin. The view travels in the existing presence message, newest only, and nothing about it is saved in the file. Not tried in a live session with real students; the educator kit copy can now mention it.