scroll up button

Is your feature request related to a problem? Please describe.
instead of scrolling all the way up ,adding a button that would scroll to directly navbar when someone reaches end of page.

Describe the solution you'd like
a scroll up button

No files or tests are named. Start by running the application and inspect the page entry point and navbar to find the end-of-page experience; done means a visible scroll-up control lets users return directly to the navbar without manually scrolling.

Written by the indexing model from the issue text.