feat(ui): render the local RTL-SDR card from the store

LocalSdrControls publishes the card to the radio store and SdrCard renders it. The new v-field-value directive never overwrites a focused field, including one a render disables.

docs/VUE-MIGRATION.md

@@ -104,9 +104,11 @@ They contain no application state.
    component compiler; the other groups follow one owner at a time),
    Context and Radio (in progress: `RadioPanel` renders the directory row,
    station card, transport, volume and playback line from the `gev-radio`
-   store that RadioControls publishes to; the tuner, the local SDR card and
-   the Cockpit radio controls keep their owners' element bindings), the
-   command dock,
+   store that RadioControls publishes to, and `SdrCard` the local RTL-SDR
+   card that LocalSdrControls publishes beside it; fields a person edits take
+   their value through `v-field-value`, which never writes a focused field;
+   the tuner and the Cockpit radio controls keep their owners' element
+   bindings), the command dock,
    the phone shell, then Cockpit. Layers that write into the right rail
    directly gain a slot instead.