Show the header bar on the first page
For GNOME 40 we're adjusting how the tour gets run. Instead of autolaunching it on the first session, we'll be showing a dialog in the shell, which will allow the tour to be run. We'll also be showing the tour app launcher.
The current first page doesn't quite fit this new arrangement:
Since the tour can be manually launched, the "No Thanks" button doesn't really make sense. The simplest solution is probably to remove that button and show the header bar with the close button.