Don't reduce border radius of small buttons

It ends up looking quite cramped and out-of-style.

## Normal radius (proposed)

<img width="816" height="452" alt="Image" src="https://github.com/user-attachments/assets/7b4dea56-2a88-4fb7-9c72-a5e25d436a0e" />

## Small radius (current)

<img width="816" height="452" alt="Image" src="https://github.com/user-attachments/assets/fcc142d6-aeaf-4ad8-a1f4-9c0ea25aca43" />

cc @susnux 