Why use the tablet to replace the Pi? Let the Pi run Volumio, and use the tablet as is to display the UI via the browser. Easiest solution!
As said, if the tablet can run Windows 10 it is theoretically possible to load the Volumio x86 image onto it. It is probably not easy though. Especially not configuring the touch display to act as such with the UI, rather than command line.
I don’t really understand this one… Volumio is an Operating System on itself, like Windows. The web-UI is specifically designed for this and cannot be used as front-end for other applications.