There is no way to change it through the ACP, you need a theme or a plugin to override the breadcrumbs & page title. Maybe nodebb-plugin-customize can help.
I got a test NodeBB setup and I'm going to try the gallery plugin next. Except, I think I just determined that the lightbox gallery plugin is not a full gallery, with management to go along with it. Is that correct?
I was previously running on SMF with the Menalto Gallery. This gave me folders, user galleries, and admin functions for the gallery side. Anything like that for NodeBB?