[Website] Single-modal “Save to browser storage” (OPFS)

[adamziel]

Playground offers to create a new persistent site when presented with a previously unseen ?site-slug=. The process is slightly annoying as it takes multi-step modal and a (sometimes lengthy!) progress bar. Let's explore making it a single modal with a single primary button that saves everything in the background so you don't have to wait for the progress bar to finish.

Questions

• What if the user closes the tab before the save is complete?