feat(ui): render the active style in the dock and the ACTIVE STYLE corner from the store

VisualSettings no longer toggles the style buttons' active class or writes
the dock's style mini status and the ACTIVE STYLE corner. It publishes the
active style and its label to the gev-display store; CommandDockView and
SceneChromeView render them. The buttons keep their owner's listeners, and
the initial label renders through t().

docs/VUE-MIGRATION.md

@@ -115,7 +115,10 @@ They contain no application state.
    publishes through `subscribePanel()`, the first layer to hand its rail
    content to a view, and `MissionRoster` and `MissionDetail` the Space
    Missions roster and selected mission that the launches layer publishes
-   the same way), the command dock,
+   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),
    the phone shell, then Cockpit. Layers that write into the right rail
    directly gain a slot instead.