There are two Views that come with Scald:
- scald_library - Which, for our purposes, is what controls the format of the menu in the editor.
- scald_atoms - Which controls the format of the Scald Library at /admin/content/atoms.
Both are fully editable views.
For the admin page, clone the View and assign each one a unique filter for Atom:Type and give each View a unique path URL. Add these URLs to an admin menu somewhere to make them findable.
The editing menu is a little more complicated. Cloning and filtering the View is the same, but I believe using them would require adding new functionality to either the editor or Scald. Though people editing content can still filter by type in the Scald search pane.