Breadcrumb navigation

The breadcrumb sits above the lines list and shows the full path of the currently selected folder, e.g. conversations / Chapter 02 / Pirates of the East.

Click any segment to jump straight up to that level.
Right-click a segment for actions on that folder (rename, flag, copy path).
Hover to see the full name of long segments that get truncated.

The breadcrumb keeps you oriented when working deep inside nested folders. It also pairs well with the keyboard shortcut Ctrl+Q to focus the folder tree, and Ctrl+S to focus the lines list — you rarely need the mouse to move around.