CONTRIBUTING gains a Building UI section: new UX elements are Vue
components rendering a Pinia store their owner publishes to, portable
owners stay framework-free behind a publish option, controls come from
src/ui/kit first, controllers don't bind the DOM by hand (Teleport where a
view renders elsewhere; body classes, focus, same-task measured positions
and painted surfaces stay imperative), text goes through t()/tn() with
msg() for stored English, and tests mount components. The README and the
architecture summary drop the stale vanilla-JS claim, the UI ownership doc
points to the guide, and the migration doc's UiPanel note names
v-panel-state as what draws a panel's collapse.
Each side stack hosts a Vue rail listing its panels; selecting one opens it
through PanelChrome. The shell owns one Vue runtime and Pinia instance, and a
panel store mirrors each side's panels from the DOM. The rail hides with its
stack, in Cockpit, clean view and recording, and on phones. Panels without a
catalog entry get a generic item, and Data Layers leaves the rail while the
f shortcut hides it.