When using Discover on mobile it's not clear when you take an action that the task is running in the background. If tasks were undertaken on a page and displayed when the user initiates one it would make it a lot clearer in my opinion.
So you want Discover push a task page the moment the user installs or removes an app? You don't think that would be a bit intrusive? To me this request suggests that feedback on the page itself isn't good enough.
I spoke with Aleix and he agreed that it should be a page. Right now the action on mobile of installing something doesn't show much feedback at all immediately to the user. If a new page isn't desired then the task should be clear on the application's page. Progress of downloading and installing.
I also agree that it should be a page on mobile, but I'm not sure taking the user to that page after every operation is the best UX. I think improving the progress display on the app page itself would reap more rewards. And IMO doing so would improve the UX on the desktop too.
Yes, the navigation is unclear. Even on desktop, the dialog is a bit weird to look at. I guess we can think a bit about what the problem is rather than the solution.