feat(radio): answer the internet radio controls through the radio store

The Radio panel's and Cockpit's Enable, launcher, station tag,
transport and volume controls call RadioControls through the radio
store instead of DOM listeners. A refused station tag gets the kept tag
back from act(), which now returns what the answering action returned.
The Cockpit's station steps keep rotate: false. The unused element
fields go from the shell.

src/contextTabKeyboard.test.mjs

@@ -65,7 +65,7 @@ test('Context tabs draw a visible keyboard-focus outline including active tabs',
 
 test('Context async action buttons remain focused while busy', () => {
   const init = _initGlobalContextPanel.toString();
-  const radio = radioBindings.slice(radioBindings.indexOf('const toggleRadio = async (trigger) => {'), radioBindings.indexOf('this.listen(this._cockpitRadioToggleBtn,'));
+  const radio = radioBindings.slice(radioBindings.indexOf('const toggleRadio = async (trigger) => {'), radioBindings.indexOf('this._storeToken = this.store?.connect?.('));
   const radioPanel = readFileSync(new URL('./ui/views/panels/RadioPanel.vue', import.meta.url), 'utf8');
   const clear = clearSelectedLayers.toString();