Layout: sidebar, header, content

The shell has three regions:

• Sidebar (left). Brand, navigation links, and a collapse toggle (top-right of the sidebar). The collapsed state is remembered across reloads.
• Top header. Workspace switcher (with add / edit / delete), in-flight AI job counter, optional Plugins button (when a workspace is selected), and a gear that opens Settings.
• Main content. Page changes with the route — list pages on the left turn into detail / player views as you drill in.
• Workspace roles — sidebar link to the catalog of actors and responsibilities used across the workspace’s processes.

Sidebar links are gated on having a selected workspace. If you don’t see them, pick a workspace from the header first (or create one — see Workspaces).