feat(ui): render the map source chips and status badge from the store

createMapSourceControls() (./ui/maps) no longer builds the chip row or
writes the status badge: it presents both and hands them to its publish
option, so the entry stays Vue-free. The shell publishes them to the
gev-display store and connects the controls, and the dock renders the
chips and calls select() for an available one. renderMapStackChips and
syncMapStackChips are deprecated. The map source QA harnesses wait for
the dock to render and no longer read the removed element refs.

docs/VUE-MIGRATION.md

@@ -118,7 +118,9 @@ They contain no application state.
    the same way), the command dock (in progress: the style buttons, the
    dock's style mini status and the ACTIVE STYLE corner render the style
    VisualSettings publishes to the `gev-display` store; the buttons keep
-   their owner's listeners),
+   their owner's listeners; the map source chips and status badge render
+   what `createMapSourceControls()` publishes beside it, so `./ui/maps`
+   needs no Vue),
    the phone shell, then Cockpit. Layers that write into the right rail
    directly gain a slot instead.