If a user clicks their username and they do not have a user page they should either see our special:userprofile page or a CTA that asks if they want to create one.
There also needs to be a link to contribs and user talk page somewhere on the mobile site.
HTML prototype for styles and assets
- Content should be served via User namespace
- Content below header should come from the user's user page.
- Visiting Special:UserProfile in beta should redirect you to the user page.
Remove browser tests for user profiles[A]
- should be done when pushing to stable - added to T120685