Hi there.
I'd like to work on this from scratch as my skill is mostly in html, css and pure javascript. However, I may need to see this menu wheel you saw so I could... probably create a mockup of it and let you test it on your Iiyama HD monitor?
Also, what do you mean with it being "offline": browsing to pages without internet connection? That wouldn't be possible I'm afraid, unless... perhaps you meant this to be available only on internal network, no?
Kindly let me know,
Hendra D.