changelog.d/5149-docs-canvas-presence.md

Rama main · réplica de lectura del repositorio original.

- **Who is where on a Docs Canvas (#5149).** On the Canvas view everyone else who has the document open shows as a named pointer in their colour, at the same place on the canvas whatever your own pan and zoom, and the cards they selected are outlined in their colour. It rides on Docs presence, so it is never stored, is checked against read access on every heartbeat, and disappears within seconds of someone leaving the Canvas or the document. `crewship doc presence` shows it and can send it with `--pointer` and `--select`.