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/contextSessionOrdering.test.mjs

@@ -168,7 +168,7 @@ test('every user-facing Context exit route settles through the failure surface',
 test('the Radio chip catches lifecycle rejection and semantic false through the toast wrapper', () => {
   const radioControls = radioBindings.slice(
     radioBindings.indexOf('const toggleRadio = async (trigger) => {'),
-    radioBindings.indexOf("this.listen(this._radioFilter, 'change'"),
+    radioBindings.indexOf('this._storeToken = this.store?.connect?.('),
   );
   assert.match(radioControls, /await this\.actions\.runUserAction\(/);
   assert.match(radioControls, /Radio could not \$\{enabling \? 'start' : 'stop'\} cleanly/);
@@ -178,7 +178,7 @@ test('the Radio chip catches lifecycle rejection and semantic false through the
 test('only the expanded Radio Enable gesture requests the contained post-enable reveal', () => {
   const radioControls = radioBindings.slice(
     radioBindings.indexOf('const toggleRadio = async (trigger) => {'),
-    radioBindings.indexOf("this.listen(this._radioFilter, 'change'"),
+    radioBindings.indexOf('this._storeToken = this.store?.connect?.('),
   );
   assert.match(radioControls, /revealAfterEnable = enabling && trigger === this\._radioEnableBtn/);
   assert.match(radioControls, /if \(revealAfterEnable\)\s*await this\._revealRadioControlsAfterExplicitEnable\(trigger\)/);