* Refactor & change `add-affiliation.tsx` file:
* Change class from `user-profile` to `add-affiliation`
* Add new optional `className` props for custom styling
* Show affiliation widget on mobile screen:
* Fix bug on use add affiliation hooks: return type should be `boolean`, not `boolean | 0`
GitOrigin-RevId: 800b951e2a012797266b1780993b4ed9a918d565