fixed problems in public user page. Paging, some components not updating, crash in tabRede when user not logged in and overlapping in activities

added a loading screen after login to prevent the user changing pages if not loaded, avoiding status 401 errors

Fixed responsiveness of some items in Editar Perfil page, links to request professor account, professor account form and other minnor things

centralized follow/unfollow logic in contact card to improve feedback when the user performs any of those actions