Add a shortcut to reopen the last closed app

Sometimes pressing back closes an app by mistake. Instead of swiping up and finding it in recents, it would be great if Niagara offered a quick option to reopen the last used app.

Of course, feasibility in terms of UI and stability could be considered before implementing such a feature. Love the minimalist look of the current UI, would appreciate if someone could suggest the team to implement such a functionality using a UI element or a gesture without breaking the minimalism.