Dock manager
IDE-style dockable workspace built on splitters and tab stacks. Panes can be dragged between stacks, torn off into floating windows, and the arrangement is round-trippable as a JSON DockLayoutSnapshot.
Basic usage
Panel 1
Static content via a named slot.
Panel 2
Drag this tab to dock it elsewhere.
Panel 3
Press M on a focused tab to enter move mode.