I would like to make adjustments in Proton Docs with Lumo similar to ChatGpt Canvas mode. So I can prompt Lumo in Proton docs, and it makes the adjustment. Ideally, the adjustment gets highlighted as a diff, like with working with LLMs in Cursor or Windsurf, so I can accept or reject the changes.

This would allow me to ditch Chatgpt for writing docs. Because currently I copy often Proton docs into Chatgpt, iterate there via Canvas and then copy it back.