Thanks.
I'm still running into the problem of the cover not having the title of the system (such as "Discussions").

I am able to add the menu, though.
On my site, the menu and cover is full-width on all main pages (such as Discussions Home). If I embed the menu this way, it stays within the boxed page, does not join the full-width design of the cover.

If that's not possible through the studio interface, can I literally duplicate that header on individual discussion pages by editing some theme files?

This exact request is actually for all content modules, be it - photos, videos, posts, discussions.