Why would they need to back to Canva? If teams are working within claude already I think they will just offboard canva/figma tasks into claude.
If code doesn't go this direction soon, I'd be surprised. PM builds a prototype with claude, or designer designs something in figma/canva - claude vibe codes 70% of the solution using your company's frameworks and design system, then hands it off to the developer who finishes it and productionizes it
Just like with code, AI will give you something to start with, but it's still going to require tweaking and manual input.