Fix styling inconsistencies

[Pwuts]

Styling changes introduced in #8260 were not applied consistency across all components, causing inconsistencies between UI components (mostly in border radius), e.g.:

Such changes should be applied to the components in @/components/ui, not to individual usages like

<Input
  className="rounded-xl"
/>

This also means it should be an integral design change, and can't be seen isolated from the rest of the application.