The session header's icon-only project button becomes a breadcrumb before
the title: the project avatar and name, then the worktree when the
session runs in one. Sessions on another server start with that server's
name; the current server is never named. Child sessions show only the
project before their lineage.
The breadcrumb opens a location card with the project, worktree or local
repository, branch, server, the full selectable path, Copy path, Reveal
(desktop, current server), and Edit project. Narrow screens, which hide
the timeline header, show the same breadcrumb in a bar under the session
view tabs.