The view you see in DiscourseHub just reflects the web view. So any changes you make to the mobile web client will be visible within DiscourseHub.
DiscourseHub makes the view cleaner as it obviates the need to have the additional browser interface elements.
As such, if you are only concerned with the DiscourseHub view you just need to prepare your modifications and deploy them in Theme Components and/or Plugins as per normal.