Refine design - Githubissues

Summary

Now that we've got some basic functionality added, we can refine the design and lay things out better.

[x] Add the time view and add habit buttons to the header
[x] Only show the save default habits button when there are no habits
[x] Move the save default habits button to the centre with some helper text
[x] Remove extraneous footer content like the /profile links, Vercel logo, etc.