Align notes on mobile

What does this MR do and why?

• Aligns mobile note actions on the right, with the username/profile at the top
• Keeps edit available on pending comments
• Removes username on small screens

Screenshots or screen recordings

Before	After

How to set up and validate locally

Links

• ✂️ UX Paper Cuts 17.1 → Improve Wiki Experience (#452225 - closed)