feat(ui): render the Cockpit utility launchers and compact Radio controls from a store

The Display and Radio launchers, their popovers and the compact Radio
transport, Enable button and volume now render from the Radio store.
RadioControls owns the disclosure state; Cockpit Escape and the Display
reveal read that state instead of the DOM, and the Enable toggle guards
re-presses synchronously. The compact transport reuses the panel's
transport state and adds only its glyph and title.

src/cockpitMarkup.test.mjs

@@ -235,7 +235,7 @@ test('Cockpit Escape handling precedes form-control shortcut suppression and foc
 test('Cockpit shortcut failures do not leak and open utilities own the first Escape', () => {
   const keydown = cockpitKeyDown.toString();
   assert.ok(keydown, 'Cockpit keyboard handler is missing');
-  assert.match(keydown, /#cockpit-utility-controls \[aria-expanded="true"\]/);
+  assert.match(keydown, /if \(this\.isUtilityDisclosureOpen\?\.\(\)\) return;/);
   assert.match(
     keydown,
     /const cockpitAttempt = !!\(\s*this\.readAircraftInfo\(\) && this\.viewer\.trackedEntity\?\.position\s*\);[\s\S]*?event\.preventDefault\(\);[\s\S]*?event\.stopImmediatePropagation\(\);[\s\S]*?!this\.isEntryAllowed\(\)/,
@@ -476,14 +476,6 @@ test('Cockpit owns a focused shared Display portal and compact Radio controls',
     css,
     /\.cockpit-utility-control\.is-expanded \.cockpit-utility-divider\s*\{[\s\S]*?linear-gradient\(\s*90deg,\s*rgb\(0 212 255 \/ 28%\),\s*rgba\(0, 212, 255, 0\.18\) 58%,\s*transparent\s*\)[\s\S]*?box-shadow:\s*0 0 7px rgba\(0, 212, 255, 0\.22\);/,
   );
-  assert.match(
-    radioBindings,
-    /this\._cockpitDisplayToggleBtn\.textContent = displayOpen \? '▶' : '◀';/,
-  );
-  assert.match(
-    radioBindings,
-    /this\._cockpitRadioToggleBtn\.textContent = radioOpen \? '▶' : '◀';/,
-  );
   assert.match(
     css,
     /#cockpit-display-panel\s*\{[\s\S]*?display:\s*flex;[\s\S]*?gap:\s*7px;[\s\S]*?padding:\s*0;[\s\S]*?border-top:\s*0;/,
@@ -1096,7 +1088,7 @@ test('Cockpit Display portals shared HUD, Detection, Parameters, and 3D controls
   );
   assert.match(
     ui,
-    /_revealCockpitStyleParameters\(\{ openDisplay = false \} = \{\}\) \{[\s\S]*?openDisplay[\s\S]*?_setCockpitDisclosure\?\.\('display', true\)[\s\S]*?aria-expanded'\) !== 'true'[\s\S]*?classList\.remove\('collapsed'\)/,
+    /_revealCockpitStyleParameters\(\{ openDisplay = false \} = \{\}\) \{[\s\S]*?openDisplay[\s\S]*?_setCockpitDisclosure\?\.\('display', true\)[\s\S]*?!this\._cockpitDisclosureOpen\?\.\('display'\)[\s\S]*?classList\.remove\('collapsed'\)/,
   );
   assert.match(
     radioBindings,

src/contextTabKeyboard.test.mjs

@@ -5,7 +5,6 @@ import { _initGlobalContextPanel } from './ui/contextBindings.js';
 import { clearSelectedLayers } from './ui/contextActions.js';
 import { readFileSync as readRadioSource } from 'node:fs';
 const radioBindings = readRadioSource(new URL('./ui/radioBindings.js', import.meta.url), 'utf8');
-const radioPresentation = readRadioSource(new URL('./ui/radioPresentation.js', import.meta.url), 'utf8');
 const contextView = readRadioSource(new URL('./ui/views/ContextView.vue', import.meta.url), 'utf8');
 import { readFileSync } from 'node:fs';
 import { test } from 'node:test';
@@ -67,7 +66,6 @@ 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 radioSync = radioPresentation.slice(0, radioPresentation.indexOf('this._radioView = {'));
   const radioPanel = readFileSync(new URL('./ui/views/panels/RadioPanel.vue', import.meta.url), 'utf8');
   const clear = clearSelectedLayers.toString();
 
@@ -79,7 +77,11 @@ test('Context async action buttons remain focused while busy', () => {
   assert.match(search, /:aria-busy=/);
   assert.match(radio, /trigger\.getAttribute\('aria-busy'\) === 'true'/);
   assert.doesNotMatch(radio, /trigger\.disabled\s*=\s*true/);
-  assert.match(radioSync, /_cockpitRadioEnableBtn\.disabled = false/);
+  const cockpitRadio = readFileSync(new URL('./ui/views/panels/CockpitUtilityControls.vue', import.meta.url), 'utf8');
+  const cockpitEnable = cockpitRadio.match(/<button id="cockpit-radio-enable-btn"[^>]*>/)?.[0];
+  assert.ok(cockpitEnable, 'Cockpit Radio Enable button is missing');
+  assert.doesNotMatch(cockpitEnable, /disabled(?!=")|:disabled/);
+  assert.match(cockpitEnable, /:aria-busy=/);
   // The Radio view never disables its Enable button; it marks it busy.
   const enable = radioPanel.match(/<button id="radio-enable-btn"[^>]*>/)?.[0];
   assert.ok(enable, 'Radio Enable button is missing');

src/ui/applicationShell.js

@@ -213,7 +213,6 @@ export class StyleManager extends ShellFacade {
         setScopeMaskFeather: services.setScopeMaskFeather,
       },
       elements: {
-        _cockpitDisplayToggleBtn: this._cockpitDisplayToggleBtn,
         _ppToggles: this._ppToggles,
         _sliderContainer: this._sliderContainer,
         _sliderPanel: this._sliderPanel,
@@ -226,6 +225,7 @@ export class StyleManager extends ShellFacade {
         _scheduleRightPanelLayout: (...args) =>
           this._scheduleRightPanelLayout(...args),
         _setCockpitDisclosure: (...args) => this._setCockpitDisclosure(...args),
+        _cockpitDisclosureOpen: (kind) => this._cockpitDisclosureOpen(kind),
         _setMapStack: (...args) => this._setMapStack(...args),
         _syncPanelCollapseButton: (...args) =>
           this._syncPanelCollapseButton(...args),
@@ -400,6 +400,9 @@ export class StyleManager extends ShellFacade {
       readDataManager: () => this._dataManager,
       readContext: () => this.getContextModeState(),
       readActiveStyle: () => this.activeStyle,
+      readUtilityDisclosureOpen: () =>
+        this._cockpitDisclosureOpen('display') ||
+        this._cockpitDisclosureOpen('radio'),
       enterPanels: () => this._panelChrome.enterCockpit(),
       exitPanels: () => this._panelChrome.exitCockpit(),
     });
@@ -1043,17 +1046,13 @@ export class StyleManager extends ShellFacade {
     this._radioControls?.destroy();
     this._radioControls = new RadioControls({
       elements: {
-        _cockpitDisplayPanel: this._cockpitDisplayPanel,
         _cockpitDisplayToggleBtn: this._cockpitDisplayToggleBtn,
         _cockpitRadioEnableBtn: this._cockpitRadioEnableBtn,
         _cockpitRadioNextBtn: this._cockpitRadioNextBtn,
-        _cockpitRadioPanel: this._cockpitRadioPanel,
         _cockpitRadioPlayBtn: this._cockpitRadioPlayBtn,
         _cockpitRadioPrevBtn: this._cockpitRadioPrevBtn,
-        _cockpitRadioStation: this._cockpitRadioStation,
         _cockpitRadioToggleBtn: this._cockpitRadioToggleBtn,
         _cockpitRadioVolume: this._cockpitRadioVolume,
-        _cockpitRadioVolumeValue: this._cockpitRadioVolumeValue,
         _cockpitUtilityControls: this._cockpitUtilityControls,
         _radioEnableBtn: this._radioEnableBtn,
         _radioFilter: this._radioFilter,
@@ -1713,9 +1712,10 @@ export class StyleManager extends ShellFacade {
     this._updateHudButtonState();
 
     this._lifetime.listen(this._cockpitDisplayToggleBtn, 'click', () => {
-      const open =
-        this._cockpitDisplayToggleBtn.getAttribute('aria-expanded') === 'true';
-      this._setCockpitDisclosure?.('display', !open);
+      this._setCockpitDisclosure?.(
+        'display',
+        !this._cockpitDisclosureOpen('display'),
+      );
     });
     this._initCockpitDisplayPortal();
   }

src/ui/cockpitController.js

@@ -64,6 +64,7 @@ export class CockpitViewController {
       getInitialVisionMode = null,
       onCameraTakeover = null,
       isEntryAllowed = null,
+      isUtilityDisclosureOpen = null,
       onEntered = null,
       onExited = null,
       restoreTrackingFrame = null,
@@ -112,6 +113,10 @@ export class CockpitViewController {
         : () => false;
     this.isEntryAllowed =
       typeof isEntryAllowed === 'function' ? isEntryAllowed : () => true;
+    this.isUtilityDisclosureOpen =
+      typeof isUtilityDisclosureOpen === 'function'
+        ? isUtilityDisclosureOpen
+        : () => false;
     this.context = document.getElementById('cockpit-context');
     this.contextPrevious = document.getElementById('cockpit-context-previous');
     this.contextNext = document.getElementById('cockpit-context-next');

src/ui/cockpitCoordinator.js

@@ -14,6 +14,7 @@ export class CockpitCoordinator {
     readDataManager,
     readContext,
     readActiveStyle,
+    readUtilityDisclosureOpen,
     enterPanels,
     exitPanels,
   }) {
@@ -25,6 +26,7 @@ export class CockpitCoordinator {
         readDataManager,
         readContext,
         readActiveStyle,
+        readUtilityDisclosureOpen,
         enterPanels,
         exitPanels,
       },
@@ -83,6 +85,7 @@ export class CockpitCoordinator {
           militaryEnabled: !!this._dataManager?.isEnabled('military'),
         }),
       publish: this.publishCockpit,
+      isUtilityDisclosureOpen: () => !!this.readUtilityDisclosureOpen?.(),
       onEntered: () => this.enterPanels(),
       onExited: () => this.exitPanels(),
       restoreTrackingFrame: (entity) => {

src/ui/cockpitInput.js

@@ -8,10 +8,8 @@ export function onKeyDown(event) {
     // focus. Its target handler closes the overlay and restores attribution
     // focus; Cockpit must stay active behind it.
     if (event.target?.closest?.('.cesium-credit-lightbox')) return;
-    if (
-      document.querySelector('#cockpit-utility-controls [aria-expanded="true"]')
-    )
-      return;
+    // An open Display or Radio popover takes Escape itself.
+    if (this.isUtilityDisclosureOpen?.()) return;
     if (this.context?.contains(event.target) && !this.contextCollapsed) {
       event.preventDefault();
       event.stopImmediatePropagation();

src/ui/cockpitUtilityControls.test.mjs

@@ -0,0 +1,297 @@
+// src/ui/cockpitUtilityControls.test.mjs — the Cockpit's Display and Radio
+// launchers and the compact Radio controls render what RadioControls
+// presents, over happy-dom with the real controls bound to them.
+import '../testSupport/registerDom.mjs';
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { createPinia } from 'pinia';
+import { createApp, nextTick } from 'vue';
+import { setLocale } from '../i18n/index.js';
+import { onKeyDown as cockpitKeyDown } from './cockpitInput.js';
+import { RadioControls } from './radioControls.js';
+import { renderRadioState } from './radioPresentation.js';
+import { useRadioStore } from './stores/radio.js';
+import CockpitUtilityControls from './views/panels/CockpitUtilityControls.vue';
+
+function fixture(t) {
+  document.body.replaceChildren();
+  const host = document.body.appendChild(document.createElement('div'));
+  const outside = document.body.appendChild(document.createElement('button'));
+  const pinia = createPinia();
+  const app = createApp(CockpitUtilityControls).use(pinia);
+  app.mount(host);
+  const $ = (id) => document.getElementById(id);
+  const calls = [];
+  let enabled = false;
+  let toggles = 0;
+  let finishToggle = null;
+  const actions = {
+    isRegistered: () => true,
+    isEnabled: () => enabled,
+    runUserAction: (operation) => operation(),
+    setEnabled: (next) => {
+      toggles += 1;
+      return new Promise((resolve) => {
+        finishToggle = () => {
+          enabled = next;
+          resolve(true);
+        };
+      });
+    },
+    setParams: (params) => calls.push(['params', params]),
+    setPanelCollapsed() {},
+    setSignalCollapsed: (collapsed) => calls.push(['signal', collapsed]),
+    revealStyleParameters: () => calls.push(['reveal']),
+    layoutCockpit() {},
+    isCockpitActive: () => true,
+    signalUserCollapsed: () => false,
+    scheduleLayout() {},
+    getLifecycle: () => null,
+    preservePanelStateDuringClear: () => true,
+  };
+  const controls = new RadioControls({
+    elements: {
+      _radioPanel: document.createElement('section'),
+      // A bare tuner: the panel's tuner has its own tests.
+      _radioTuner: document.createElement('div'),
+      _radioTunerSlider: Object.assign(document.createElement('input'), {
+        type: 'range',
+      }),
+      _cockpitUtilityControls: $('cockpit-utility-controls'),
+      _cockpitDisplayToggleBtn: $('cockpit-display-toggle-btn'),
+      _cockpitRadioToggleBtn: $('cockpit-radio-toggle-btn'),
+      _cockpitRadioEnableBtn: $('cockpit-radio-enable-btn'),
+      _cockpitRadioPrevBtn: $('cockpit-radio-prev-btn'),
+      _cockpitRadioPlayBtn: $('cockpit-radio-play-btn'),
+      _cockpitRadioNextBtn: $('cockpit-radio-next-btn'),
+      _cockpitRadioVolume: $('cockpit-radio-volume'),
+    },
+    radio: {
+      subscribe: () => () => {},
+      endTuning() {},
+      getTunerStations: () => [],
+    },
+    actions,
+    canvas: document.createElement('canvas'),
+    store: useRadioStore(pinia),
+  });
+  t.after(() => {
+    controls.destroy();
+    app.unmount();
+  });
+  const render = async (state) => {
+    renderRadioState.call(controls, {
+      enabled: true,
+      categories: [{ id: 'all', label: 'All', count: 3, color: '' }],
+      filter: 'all',
+      filteredCount: 3,
+      stationCount: 3,
+      volume: 0.8,
+      audioState: 'stopped',
+      ...state,
+    });
+    await nextTick();
+  };
+  return {
+    $,
+    controls,
+    calls,
+    render,
+    outside,
+    finishToggle: () => finishToggle(),
+    toggles: () => toggles,
+  };
+}
+
+const control = (button) => button.closest('.cockpit-utility-control');
+
+test('before RadioControls presents, both popovers are closed and the controls start idle', (t) => {
+  const { $ } = fixture(t);
+  for (const kind of ['display', 'radio']) {
+    const toggle = $(`cockpit-${kind}-toggle-btn`);
+    assert.equal(toggle.getAttribute('aria-expanded'), 'false');
+    assert.equal(toggle.textContent, '◀');
+    assert.equal($(`cockpit-${kind}-panel`).hidden, true);
+    assert.equal(control(toggle).classList.contains('is-expanded'), false);
+  }
+  assert.equal(
+    $('cockpit-display-toggle-btn').getAttribute('aria-label'),
+    'Expand Cockpit display options',
+  );
+  assert.equal(
+    $('cockpit-radio-toggle-btn').title,
+    'Expand Cockpit Radio controls',
+  );
+  assert.equal($('cockpit-radio-station').textContent, 'READY');
+  const enable = $('cockpit-radio-enable-btn');
+  assert.equal(enable.textContent, 'ENABLE');
+  assert.equal(enable.getAttribute('aria-pressed'), 'false');
+  assert.equal(enable.hasAttribute('aria-busy'), false);
+  assert.equal($('cockpit-radio-play-btn').disabled, true);
+  assert.equal($('cockpit-radio-play-btn').textContent, '▶');
+  assert.equal($('cockpit-radio-volume').value, '80');
+  assert.equal($('cockpit-radio-volume').disabled, true);
+  assert.equal($('cockpit-radio-volume-value').textContent, '80%');
+  assert.equal(
+    document.querySelectorAll('[data-cockpit-display-slot]').length,
+    4,
+  );
+});
+
+test('a launcher opens its popover, closes the other, and Escape returns focus', async (t) => {
+  const { $, controls, calls } = fixture(t);
+  // The application shell takes the Display launcher's clicks.
+  controls._setCockpitDisclosure('display', true);
+  await nextTick();
+  assert.equal(controls._cockpitDisclosureOpen('display'), true);
+  assert.equal($('cockpit-display-panel').hidden, false);
+  assert.equal($('cockpit-display-toggle-btn').textContent, '▶');
+  assert.equal(
+    $('cockpit-display-toggle-btn').getAttribute('aria-label'),
+    'Collapse Cockpit display options',
+  );
+  assert.equal(
+    control($('cockpit-display-toggle-btn')).classList.contains('is-expanded'),
+    true,
+  );
+  assert.deepEqual(calls.slice(0, 2), [['signal', true], ['reveal']]);
+  $('cockpit-radio-toggle-btn').click();
+  await nextTick();
+  assert.equal($('cockpit-display-panel').hidden, true);
+  assert.equal($('cockpit-radio-panel').hidden, false);
+  assert.equal(
+    $('cockpit-radio-toggle-btn').getAttribute('aria-expanded'),
+    'true',
+  );
+  $('cockpit-radio-play-btn').dispatchEvent(
+    new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }),
+  );
+  await nextTick();
+  assert.equal($('cockpit-radio-panel').hidden, true);
+  assert.equal(document.activeElement === $('cockpit-radio-toggle-btn'), true);
+  assert.deepEqual(calls.at(-1), ['signal', false]);
+});
+
+test('a press outside the Cockpit controls closes the open popover', async (t) => {
+  const { $, controls, outside } = fixture(t);
+  controls._setCockpitDisclosure('radio', true);
+  await nextTick();
+  $('cockpit-radio-volume').dispatchEvent(
+    new PointerEvent('pointerdown', { bubbles: true }),
+  );
+  await nextTick();
+  assert.equal($('cockpit-radio-panel').hidden, false);
+  outside.dispatchEvent(new PointerEvent('pointerdown', { bubbles: true }));
+  await nextTick();
+  assert.equal($('cockpit-radio-panel').hidden, true);
+  assert.equal(controls._cockpitDisclosureOpen('radio'), false);
+});
+
+test('the compact controls render the presented Radio state', async (t) => {
+  const { $, render } = fixture(t);
+  await render({
+    selected: { id: 's1', name: 'KUTX' },
+    audioState: 'playing',
+    volume: 0.35,
+  });
+  assert.equal($('cockpit-radio-station').textContent, 'KUTX');
+  const enable = $('cockpit-radio-enable-btn');
+  assert.equal(enable.textContent, 'DISABLE');
+  assert.equal(enable.classList.contains('active'), true);
+  assert.equal(enable.classList.contains('panel-layer-toggle'), true);
+  assert.equal(enable.getAttribute('aria-pressed'), 'true');
+  assert.equal(enable.getAttribute('aria-label'), 'Disable Radio');
+  assert.equal(enable.getAttribute('aria-busy'), 'false');
+  assert.equal(enable.disabled, false);
+  const play = $('cockpit-radio-play-btn');
+  assert.equal(play.disabled, false);
+  assert.equal(play.textContent, 'Ⅱ');
+  assert.equal(play.classList.contains('active'), true);
+  assert.equal(play.getAttribute('aria-label'), 'Pause selected radio station');
+  assert.equal(play.title, 'Pause');
+  assert.equal($('cockpit-radio-prev-btn').disabled, false);
+  assert.equal($('cockpit-radio-volume').value, '35');
+  assert.equal($('cockpit-radio-volume').disabled, false);
+  assert.equal($('cockpit-radio-volume-value').textContent, '35%');
+  await render({ enabled: false, selected: null, loading: true });
+  assert.equal($('cockpit-radio-station').textContent, 'SYNCING');
+  assert.equal(enable.textContent, 'ENABLE');
+  assert.equal(enable.classList.contains('active'), false);
+  assert.equal(play.disabled, true);
+  assert.equal(play.textContent, '▶');
+  assert.equal($('cockpit-radio-volume').disabled, true);
+});
+
+test('dragging the volume shows the value at once and a render leaves the held slider alone', async (t) => {
+  const { $, calls, render } = fixture(t);
+  await render({ volume: 0.8 });
+  const volume = $('cockpit-radio-volume');
+  volume.focus();
+  volume.value = '42';
+  volume.dispatchEvent(new Event('input', { bubbles: true }));
+  await nextTick();
+  assert.equal($('cockpit-radio-volume-value').textContent, '42%');
+  assert.deepEqual(calls.at(-1), ['params', { volume: 0.42 }]);
+  // A render reporting an older volume while the slider is held.
+  await render({ volume: 0.8 });
+  assert.equal(volume.value, '42');
+});
+
+test('the Cockpit Enable button is marked busy while its own toggle runs', async (t) => {
+  const { $, render, finishToggle, toggles } = fixture(t);
+  await render({ enabled: false });
+  const enable = $('cockpit-radio-enable-btn');
+  // A double press lands before the busy state renders; only one toggle runs.
+  enable.click();
+  enable.click();
+  assert.equal(toggles(), 1);
+  await nextTick();
+  assert.equal(enable.getAttribute('aria-busy'), 'true');
+  assert.equal(enable.getAttribute('aria-disabled'), 'true');
+  assert.equal(enable.disabled, false);
+  // A second press while busy starts nothing.
+  enable.click();
+  assert.equal(toggles(), 1);
+  finishToggle();
+  await new Promise((resolve) => setTimeout(resolve, 0));
+  await nextTick();
+  assert.equal(enable.getAttribute('aria-busy'), 'false');
+});
+
+test('the launchers read in the UI language', async (t) => {
+  t.after(() => setLocale('en'));
+  setLocale('ru');
+  const { $, controls } = fixture(t);
+  const before = $('cockpit-radio-toggle-btn').getAttribute('aria-label');
+  controls._setCockpitDisclosure('radio', true);
+  await nextTick();
+  const after = $('cockpit-radio-toggle-btn').getAttribute('aria-label');
+  assert.notEqual(before, 'Expand Cockpit Radio controls');
+  assert.notEqual(after, before);
+  assert.notEqual(after, 'Collapse Cockpit Radio controls');
+});
+
+test('Cockpit Escape defers to a popover the moment its disclosure opens', async (t) => {
+  const { controls } = fixture(t);
+  let exits = 0;
+  const cockpit = {
+    active: true,
+    isUtilityDisclosureOpen: () =>
+      controls._cockpitDisclosureOpen('display') ||
+      controls._cockpitDisclosureOpen('radio'),
+    exit: () => (exits += 1),
+  };
+  const escape = () =>
+    cockpitKeyDown.call(
+      cockpit,
+      new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }),
+    );
+  // Dispatched in the same task, before Vue renders the open popover.
+  controls._setCockpitDisclosure('radio', true);
+  escape();
+  assert.equal(exits, 0);
+  controls._setCockpitDisclosure('radio', false);
+  escape();
+  assert.equal(exits, 1);
+  await nextTick();
+});

src/ui/radioBindings.js

@@ -20,56 +20,9 @@ export function bindRadioControls() {
     const displayOpen = kind === 'display' && Boolean(expanded);
     const radioOpen = kind === 'radio' && Boolean(expanded);
     if (displayOpen || radioOpen) this.actions.setSignalCollapsed(true);
-    if (this._cockpitDisplayPanel)
-      this._cockpitDisplayPanel.hidden = !displayOpen;
-    if (this._cockpitRadioPanel) this._cockpitRadioPanel.hidden = !radioOpen;
-    this._cockpitDisplayToggleBtn
-      ?.closest('.cockpit-utility-control')
-      ?.classList.toggle('is-expanded', displayOpen);
-    this._cockpitRadioToggleBtn
-      ?.closest('.cockpit-utility-control')
-      ?.classList.toggle('is-expanded', radioOpen);
-    this._cockpitDisplayToggleBtn?.setAttribute(
-      'aria-expanded',
-      String(displayOpen),
-    );
-    this._cockpitRadioToggleBtn?.setAttribute(
-      'aria-expanded',
-      String(radioOpen),
-    );
+    this._cockpitDisclosure = { display: displayOpen, radio: radioOpen };
+    this.store?.publishUtility({ ...this._cockpitDisclosure });
     if (displayOpen) this.actions.revealStyleParameters();
-    if (this._cockpitDisplayToggleBtn) {
-      this._cockpitDisplayToggleBtn.textContent = displayOpen ? '▶' : '◀';
-      this._cockpitDisplayToggleBtn.setAttribute(
-        'aria-label',
-        t(
-          displayOpen
-            ? msg('Collapse Cockpit display options')
-            : msg('Expand Cockpit display options'),
-        ),
-      );
-      this._cockpitDisplayToggleBtn.title = t(
-        displayOpen
-          ? msg('Collapse Cockpit display options')
-          : msg('Expand Cockpit display options'),
-      );
-    }
-    if (this._cockpitRadioToggleBtn) {
-      this._cockpitRadioToggleBtn.textContent = radioOpen ? '▶' : '◀';
-      this._cockpitRadioToggleBtn.setAttribute(
-        'aria-label',
-        t(
-          radioOpen
-            ? msg('Collapse Cockpit Radio controls')
-            : msg('Expand Cockpit Radio controls'),
-        ),
-      );
-      this._cockpitRadioToggleBtn.title = t(
-        radioOpen
-          ? msg('Collapse Cockpit Radio controls')
-          : msg('Expand Cockpit Radio controls'),
-      );
-    }
     if (!expanded && returnFocus) {
       (kind === 'display'
         ? this._cockpitDisplayToggleBtn
@@ -87,6 +40,9 @@ export function bindRadioControls() {
     this.actions.layoutCockpit();
   };
   this._setCockpitDisclosure = setCockpitDisclosure;
+  /** @param {'display'|'radio'} kind @returns {boolean} Whether it is open. */
+  this._cockpitDisclosureOpen = (kind) =>
+    Boolean(this._cockpitDisclosure?.[kind]);
   const syncTunerTape = (coordinate) => {
     const scale = this._radioTuner?.querySelector('.radio-tuner-scale');
     const dial = this._radioTuner?.querySelector('.radio-tuner-dial');
@@ -339,22 +295,29 @@ export function bindRadioControls() {
       return;
     }
   };
-  // The panel's Enable button renders from the Radio store; the Cockpit one
-  // is still written directly.
+  // Both Enable buttons render from the Radio store; before its first render
+  // there is nothing shown to mark, so the button is marked directly.
   const setTriggerBusy = (trigger, busy) => {
-    if (
-      trigger === this._radioEnableBtn &&
-      showRadioEnableBusy.call(this, busy)
-    )
-      return;
+    const where =
+      trigger === this._radioEnableBtn
+        ? 'panel'
+        : trigger === this._cockpitRadioEnableBtn
+          ? 'cockpit'
+          : null;
+    if (where && showRadioEnableBusy.call(this, busy, where)) return;
     trigger.setAttribute('aria-disabled', String(busy));
     trigger.setAttribute('aria-busy', String(busy));
   };
+  // The store patches aria-busy on the next render, so a second press before
+  // it lands is turned away by this set.
+  const busyTriggers = new Set();
   const toggleRadio = async (trigger) => {
     if (!this.actions.isRegistered()) return;
+    if (busyTriggers.has(trigger)) return;
     if (trigger.getAttribute('aria-busy') === 'true') return;
     const enabling = !this.actions.isEnabled();
     const revealAfterEnable = enabling && trigger === this._radioEnableBtn;
+    busyTriggers.add(trigger);
     setTriggerBusy(trigger, true);
     try {
       const toggled = await this.actions.runUserAction(
@@ -387,6 +350,7 @@ export function bindRadioControls() {
       if (revealAfterEnable)
         await this._revealRadioControlsAfterExplicitEnable(trigger);
     } finally {
+      busyTriggers.delete(trigger);
       if (!this.destroyed) {
         setTriggerBusy(trigger, false);
         if (revealAfterEnable && trigger.isConnected)
@@ -405,9 +369,7 @@ export function bindRadioControls() {
     () => void toggleRadio(this._cockpitRadioEnableBtn),
   );
   this.listen(this._cockpitRadioToggleBtn, 'click', () => {
-    const open =
-      this._cockpitRadioToggleBtn.getAttribute('aria-expanded') === 'true';
-    setCockpitDisclosure('radio', !open);
+    setCockpitDisclosure('radio', !this._cockpitDisclosureOpen('radio'));
   });
   this.listen(
     document,
@@ -431,10 +393,8 @@ export function bindRadioControls() {
     'keydown',
     (event) => {
       if (event.key !== 'Escape') return;
-      const displayOpen =
-        this._cockpitDisplayToggleBtn?.getAttribute('aria-expanded') === 'true';
-      const radioOpen =
-        this._cockpitRadioToggleBtn?.getAttribute('aria-expanded') === 'true';
+      const displayOpen = this._cockpitDisclosureOpen('display');
+      const radioOpen = this._cockpitDisclosureOpen('radio');
       if (!displayOpen && !radioOpen) return;
       const nestedPanel = event.target?.closest?.(
         '.panel-collapsible:not(.collapsed), #param-slider-panel:not(.collapsed)',
@@ -534,8 +494,7 @@ export function bindRadioControls() {
   );
   this.listen(this._cockpitRadioVolume, 'input', () => {
     const value = Number(this._cockpitRadioVolume.value);
-    if (this._cockpitRadioVolumeValue)
-      this._cockpitRadioVolumeValue.textContent = `${value}%`;
+    showRadioVolume.call(this, value);
     this.actions.setParams({ volume: value / 100 }, { origin: 'user' });
   });
   const updateTunerFromPointer = (event) => {

src/ui/radioControls.js

@@ -29,6 +29,7 @@ export class RadioControls {
     this._radioCategorySignature = '';
     this._radioFilterOptions = null;
     this._radioVolumeShown = null;
+    this._cockpitDisclosure = { display: false, radio: false };
     this._radioTunerStations = [];
     this._radioTunerPool = [];
     this._radioTunerDragging = false;

src/ui/radioPresentation.js

@@ -1,8 +1,8 @@
 /**
  * Present Radio state without making playback or Context decisions: the
  * panel view renders the directory row, station card, transport, volume and
- * playback line from what this publishes (`gev-radio` store); the tuner and
- * the Cockpit radio controls are still written here.
+ * playback line, and the Cockpit's compact radio controls, from what this
+ * publishes (`gev-radio` store); the tuner is still written here.
  */
 import { t } from '../i18n/index.js';
 
@@ -50,23 +50,6 @@ export function renderRadioState(state) {
     : enabled
       ? t('Disable Radio')
       : t('Enable Radio');
-  if (this._cockpitRadioEnableBtn) {
-    this._cockpitRadioEnableBtn.classList.toggle('active', enabled);
-    this._cockpitRadioEnableBtn.setAttribute('aria-pressed', String(enabled));
-    this._cockpitRadioEnableBtn.textContent = transitioning
-      ? lifecycleLabel
-      : enableLabel;
-    this._cockpitRadioEnableBtn.setAttribute('aria-label', enableAria);
-    this._cockpitRadioEnableBtn.disabled = false;
-    this._cockpitRadioEnableBtn.setAttribute(
-      'aria-disabled',
-      String(transitioning),
-    );
-    this._cockpitRadioEnableBtn.setAttribute(
-      'aria-busy',
-      String(transitioning),
-    );
-  }
 
   const filter = state.filter || 'all';
   const categories = state.categories || [];
@@ -136,10 +119,6 @@ export function renderRadioState(state) {
       : t('Choose a globe marker or use next.');
   const tags = Array.isArray(selected?.tags) ? selected.tags.slice(0, 8) : [];
 
-  if (this._cockpitRadioPrevBtn)
-    this._cockpitRadioPrevBtn.disabled = !interactive || !hasStations;
-  if (this._cockpitRadioNextBtn)
-    this._cockpitRadioNextBtn.disabled = !interactive || !hasStations;
   const playbackAction = activePlayback
     ? t('Pause')
     : state.audioState === 'paused'
@@ -156,34 +135,11 @@ export function renderRadioState(state) {
     action: playbackAction,
     target: playTargetWord,
   });
-  if (this._cockpitRadioPlayBtn) {
-    this._cockpitRadioPlayBtn.disabled = !interactive || !hasStations;
-    this._cockpitRadioPlayBtn.classList.toggle('active', activePlayback);
-    this._cockpitRadioPlayBtn.textContent = activePlayback ? 'Ⅱ' : '▶';
-    this._cockpitRadioPlayBtn.setAttribute('aria-label', playAria);
-    this._cockpitRadioPlayBtn.title = playbackAction;
-  }
   // A slider the person is dragging keeps the value they are setting.
   this._radioVolumeShown =
     this._radioVolume && document.activeElement === this._radioVolume
       ? Number(this._radioVolume.value)
       : Math.round(state.volume * 100);
-  if (
-    this._cockpitRadioVolume &&
-    document.activeElement !== this._cockpitRadioVolume
-  ) {
-    this._cockpitRadioVolume.value = String(Math.round(state.volume * 100));
-  }
-  if (this._cockpitRadioVolume)
-    this._cockpitRadioVolume.disabled = !interactive;
-  if (this._cockpitRadioVolumeValue) {
-    this._cockpitRadioVolumeValue.textContent = `${Math.round(state.volume * 100)}%`;
-  }
-  if (this._cockpitRadioStation) {
-    this._cockpitRadioStation.textContent = uncertain
-      ? t('UNCERTAIN')
-      : selected?.name || (state.loading ? t('SYNCING') : t('READY'));
-  }
   let playbackText = '';
   let playbackError = false;
   {
@@ -243,16 +199,17 @@ export function renderRadioState(state) {
       state.audioState === 'error',
     );
   }
+  const enable = {
+    active: enabled,
+    text: transitioning ? lifecycleLabel : enableLabel,
+    label: enableAria,
+    busy: transitioning,
+  };
   this._radioView = {
     enabled,
     uncertain,
     layerState: { active: enabled, text: layerStateText },
-    enable: {
-      active: enabled,
-      text: transitioning ? lifecycleLabel : enableLabel,
-      label: enableAria,
-      busy: transitioning,
-    },
+    enable,
     filter: {
       options: this._radioFilterOptions ?? null,
       value: filter,
@@ -277,6 +234,20 @@ export function renderRadioState(state) {
     },
     volume: { disabled: !interactive, value: this._radioVolumeShown },
     playback: { text: playbackText, error: playbackError },
+    // The Cockpit's compact controls: a glyph transport and the layer's own
+    // volume, which only a focused slider holds back.
+    cockpit: {
+      station: uncertain
+        ? t('UNCERTAIN')
+        : selected?.name || (state.loading ? t('SYNCING') : t('READY')),
+      enable: { ...enable },
+      // The rest of the transport is the panel's; the glyphs are the Cockpit's.
+      play: { glyph: activePlayback ? 'Ⅱ' : '▶', title: playbackAction },
+      volume: {
+        disabled: !interactive,
+        value: Math.round(state.volume * 100),
+      },
+    },
   };
   this.store?.publish(this._radioView);
   if (
@@ -291,31 +262,42 @@ export function renderRadioState(state) {
 }
 
 /**
- * Show the volume the person is setting before the layer reports it.
+ * Show the volume the person is setting, on either slider, before the layer
+ * reports it.
  * @param {number} value Percent, as the slider holds it.
  */
 export function showRadioVolume(value) {
   this._radioVolumeShown = value;
   if (!this._radioView) return;
+  const { volume, cockpit } = this._radioView;
   this._radioView = {
     ...this._radioView,
-    volume: { ...this._radioView.volume, value },
+    volume: { ...volume, value },
+    cockpit: { ...cockpit, volume: { ...cockpit.volume, value } },
   };
   this.store?.publish(this._radioView);
 }
 
 /**
- * Mark the panel's Enable button busy while its own toggle runs, as a render
- * would until the next one reports the lifecycle.
+ * Mark an Enable button busy while its own toggle runs, as a render would
+ * until the next one reports the lifecycle.
  * @param {boolean} busy
+ * @param {'panel'|'cockpit'} [where] The panel's button or the Cockpit's.
  * @returns {boolean} False before the first render, when nothing is shown yet.
  */
-export function showRadioEnableBusy(busy) {
+export function showRadioEnableBusy(busy, where = 'panel') {
   if (!this._radioView) return false;
-  this._radioView = {
-    ...this._radioView,
-    enable: { ...this._radioView.enable, busy },
-  };
+  const view = this._radioView;
+  this._radioView =
+    where === 'cockpit'
+      ? {
+          ...view,
+          cockpit: {
+            ...view.cockpit,
+            enable: { ...view.cockpit.enable, busy },
+          },
+        }
+      : { ...view, enable: { ...view.enable, busy } };
   this.store?.publish(this._radioView);
   return true;
 }

src/ui/shellElements.js

@@ -46,16 +46,11 @@ export function readShellElements(document = globalThis.document) {
     ),
     _cockpitDisplayPanel: document.getElementById('cockpit-display-panel'),
     _cockpitRadioToggleBtn: document.getElementById('cockpit-radio-toggle-btn'),
-    _cockpitRadioPanel: document.getElementById('cockpit-radio-panel'),
     _cockpitRadioEnableBtn: document.getElementById('cockpit-radio-enable-btn'),
-    _cockpitRadioStation: document.getElementById('cockpit-radio-station'),
     _cockpitRadioPrevBtn: document.getElementById('cockpit-radio-prev-btn'),
     _cockpitRadioPlayBtn: document.getElementById('cockpit-radio-play-btn'),
     _cockpitRadioNextBtn: document.getElementById('cockpit-radio-next-btn'),
     _cockpitRadioVolume: document.getElementById('cockpit-radio-volume'),
-    _cockpitRadioVolumeValue: document.getElementById(
-      'cockpit-radio-volume-value',
-    ),
     _radioLayerState: document.getElementById('radio-layer-state'),
     _radioEnableBtn: document.getElementById('radio-enable-btn'),
     _radioFilter: document.getElementById('radio-filter'),

src/ui/shellFacade.js

@@ -948,6 +948,10 @@ export class ShellFacade {
     return this._radioControls?._setCockpitDisclosure?.(...args);
   }
 
+  _cockpitDisclosureOpen(kind) {
+    return Boolean(this._radioControls?._cockpitDisclosureOpen?.(kind));
+  }
+
   _renderRadioState(...args) {
     return this._radioControls?._renderRadioState?.(...args);
   }

src/ui/stores/radio.js

@@ -3,10 +3,11 @@ import { markRaw, shallowRef } from 'vue';
 
 /**
  * The Radio panel as its view renders it. RadioControls presents the
- * directory row, station card, transport, volume and playback line
- * (`renderRadioState()`) and publishes them here; it keeps its listeners,
- * the tuner and the Cockpit radio controls. LocalSdrControls publishes the
- * local RTL-SDR card beside it.
+ * directory row, station card, transport, volume and playback line and the
+ * Cockpit's compact radio controls (`renderRadioState()`), and which Cockpit
+ * utility popover is open, and publishes them here; it keeps its listeners
+ * and the tuner. LocalSdrControls publishes the local RTL-SDR card beside
+ * it.
  */
 export const useRadioStore = defineStore('gev-radio', () => {
   /** The presented panel; null until the controls first render. */
@@ -25,5 +26,13 @@ export const useRadioStore = defineStore('gev-radio', () => {
     sdr.value = markRaw(next);
   }
 
-  return { view, publish, sdr, publishSdr };
+  /** The open Cockpit utility popover; null until one first opens or closes. */
+  const utility = shallowRef(null);
+
+  /** @param {{display: boolean, radio: boolean}} next */
+  function publishUtility(next) {
+    utility.value = markRaw(next);
+  }
+
+  return { view, publish, sdr, publishSdr, utility, publishUtility };
 });

src/ui/views/CockpitView.vue

@@ -12,6 +12,7 @@ import { useCockpitStore } from '../stores/cockpit.js';
 import CockpitBriefing from './panels/CockpitBriefing.vue';
 import CockpitContext from './panels/CockpitContext.vue';
 import CockpitRollingValue from './panels/CockpitRollingValue.vue';
+import CockpitUtilityControls from './panels/CockpitUtilityControls.vue';
 
 // The Cockpit HUD. The Cockpit controller presents the instruments, the
 // destination arrow and the vision selector on every HUD update; until it
@@ -180,42 +181,7 @@ const tickStyle = (tick) =>
     </div>
     <CockpitContext />
     <CockpitBriefing />
-    <aside id="cockpit-utility-controls" class="cockpit-utility-controls" aria-label="Cockpit display and Radio controls" data-i18n-aria-label>
-      <div class="cockpit-utility-control">
-        <div class="cockpit-utility-launcher" data-cockpit-launcher="display">
-          <span data-i18n>DISPLAY</span>
-          <span class="cockpit-utility-divider" aria-hidden="true"></span>
-          <button id="cockpit-display-toggle-btn" class="cockpit-utility-glyph" type="button" aria-expanded="false" aria-controls="cockpit-display-panel" aria-label="Expand Cockpit display options" title="Expand Cockpit display options" data-i18n-aria-label data-i18n-title>◀</button>
-        </div>
-        <div id="cockpit-display-panel" class="cockpit-utility-popover" role="group" aria-label="Cockpit display options" hidden data-i18n-aria-label>
-          <div class="cockpit-display-slot" data-cockpit-display-slot="hud"></div>
-          <div class="cockpit-display-slot" data-cockpit-display-slot="detection"></div>
-          <div class="cockpit-display-slot" data-cockpit-display-slot="parameters"></div>
-          <div class="cockpit-display-slot" data-cockpit-display-slot="models3d"></div>
-        </div>
-      </div>
-      <div class="cockpit-utility-control">
-        <div class="cockpit-utility-launcher" data-cockpit-launcher="radio">
-          <span data-i18n>RADIO</span>
-          <span class="cockpit-utility-divider" aria-hidden="true"></span>
-          <button id="cockpit-radio-toggle-btn" class="cockpit-utility-glyph" type="button" aria-expanded="false" aria-controls="cockpit-radio-panel" aria-label="Expand Cockpit Radio controls" title="Expand Cockpit Radio controls" data-i18n-aria-label data-i18n-title>◀</button>
-        </div>
-        <div id="cockpit-radio-panel" class="cockpit-utility-popover cockpit-radio-compact" role="group" aria-label="Cockpit compact Radio controls" hidden data-i18n-aria-label>
-          <strong id="cockpit-radio-station" class="cockpit-radio-station" data-i18n>READY</strong>
-          <button id="cockpit-radio-enable-btn" class="panel-layer-toggle" type="button" aria-pressed="false" data-i18n>ENABLE</button>
-          <div class="cockpit-radio-transport">
-            <button id="cockpit-radio-prev-btn" type="button" aria-label="Previous filtered radio station" disabled data-i18n-aria-label>◀◀</button>
-            <button id="cockpit-radio-play-btn" type="button" aria-label="Play selected radio station" disabled data-i18n-aria-label>▶</button>
-            <button id="cockpit-radio-next-btn" type="button" aria-label="Next filtered radio station" disabled data-i18n-aria-label>▶▶</button>
-          </div>
-          <label class="cockpit-radio-volume" for="cockpit-radio-volume">
-            <span data-i18n>VOLUME</span>
-            <input id="cockpit-radio-volume" class="gev-quantitative-slider" type="range" min="0" max="100" value="80" aria-label="Cockpit Radio volume" disabled data-i18n-aria-label />
-            <output id="cockpit-radio-volume-value" class="gev-slider-value" for="cockpit-radio-volume">80%</output>
-          </label>
-        </div>
-      </div>
-    </aside>
+    <CockpitUtilityControls />
     <div class="cockpit-help"><bdi data-i18n>ESC EXIT</bdi> <span>·</span> <bdi data-i18n>C TOGGLE</bdi></div>
   </section>
 

src/ui/views/panels/CockpitUtilityControls.vue

@@ -0,0 +1,66 @@
+<script setup>
+import { storeToRefs } from 'pinia';
+import { computed } from 'vue';
+import { t } from '../../../i18n/index.js';
+import { vClassToggle } from '../../rail/classToggle.js';
+import { vFieldValue } from '../../rail/fieldValue.js';
+import { useRadioStore } from '../../stores/radio.js';
+
+// The Cockpit's Display and Radio launchers and their popovers. RadioControls
+// presents which popover is open and the compact Radio controls; until it
+// does, both are closed and the controls show their initial state. The
+// controls keep its listeners. The Display popover's slots are static: the
+// Cockpit display portal moves the real Display controls into them.
+const { view: radio, utility } = storeToRefs(useRadioStore());
+const open = computed(() => utility.value ?? { display: false, radio: false });
+const cockpit = computed(() => radio.value?.cockpit ?? null);
+const displayLabel = computed(() =>
+  open.value.display
+    ? t('Collapse Cockpit display options')
+    : t('Expand Cockpit display options'),
+);
+const radioLabel = computed(() =>
+  open.value.radio
+    ? t('Collapse Cockpit Radio controls')
+    : t('Expand Cockpit Radio controls'),
+);
+</script>
+
+<template>
+  <aside id="cockpit-utility-controls" class="cockpit-utility-controls" aria-label="Cockpit display and Radio controls" data-i18n-aria-label>
+    <div class="cockpit-utility-control" v-class-toggle="{ 'is-expanded': open.display }">
+      <div class="cockpit-utility-launcher" data-cockpit-launcher="display">
+        <span data-i18n>DISPLAY</span>
+        <span class="cockpit-utility-divider" aria-hidden="true"></span>
+        <button id="cockpit-display-toggle-btn" class="cockpit-utility-glyph" type="button" :aria-expanded="String(open.display)" aria-controls="cockpit-display-panel" :aria-label="displayLabel" :title="displayLabel">{{ open.display ? '▶' : '◀' }}</button>
+      </div>
+      <div id="cockpit-display-panel" class="cockpit-utility-popover" role="group" aria-label="Cockpit display options" :hidden="!open.display" data-i18n-aria-label>
+        <div class="cockpit-display-slot" data-cockpit-display-slot="hud"></div>
+        <div class="cockpit-display-slot" data-cockpit-display-slot="detection"></div>
+        <div class="cockpit-display-slot" data-cockpit-display-slot="parameters"></div>
+        <div class="cockpit-display-slot" data-cockpit-display-slot="models3d"></div>
+      </div>
+    </div>
+    <div class="cockpit-utility-control" v-class-toggle="{ 'is-expanded': open.radio }">
+      <div class="cockpit-utility-launcher" data-cockpit-launcher="radio">
+        <span data-i18n>RADIO</span>
+        <span class="cockpit-utility-divider" aria-hidden="true"></span>
+        <button id="cockpit-radio-toggle-btn" class="cockpit-utility-glyph" type="button" :aria-expanded="String(open.radio)" aria-controls="cockpit-radio-panel" :aria-label="radioLabel" :title="radioLabel">{{ open.radio ? '▶' : '◀' }}</button>
+      </div>
+      <div id="cockpit-radio-panel" class="cockpit-utility-popover cockpit-radio-compact" role="group" aria-label="Cockpit compact Radio controls" :hidden="!open.radio" data-i18n-aria-label>
+        <strong id="cockpit-radio-station" class="cockpit-radio-station">{{ cockpit ? cockpit.station : t('READY') }}</strong>
+        <button id="cockpit-radio-enable-btn" class="panel-layer-toggle" v-class-toggle="{ active: cockpit?.enable.active }" type="button" :aria-pressed="String(cockpit?.enable.active ?? false)" :aria-label="cockpit?.enable.label" :aria-disabled="cockpit ? String(cockpit.enable.busy) : undefined" :aria-busy="cockpit ? String(cockpit.enable.busy) : undefined">{{ cockpit ? cockpit.enable.text : t('ENABLE') }}</button>
+        <div class="cockpit-radio-transport">
+          <button id="cockpit-radio-prev-btn" type="button" aria-label="Previous filtered radio station" :disabled="radio ? radio.transport.stepDisabled : true" data-i18n-aria-label>◀◀</button>
+          <button id="cockpit-radio-play-btn" type="button" v-class-toggle="{ active: radio?.transport.play.active }" :aria-label="radio ? radio.transport.play.label : t('Play selected radio station')" :title="cockpit?.play.title" :disabled="radio ? radio.transport.play.disabled : true">{{ cockpit ? cockpit.play.glyph : '▶' }}</button>
+          <button id="cockpit-radio-next-btn" type="button" aria-label="Next filtered radio station" :disabled="radio ? radio.transport.stepDisabled : true" data-i18n-aria-label>▶▶</button>
+        </div>
+        <label class="cockpit-radio-volume" for="cockpit-radio-volume">
+          <span data-i18n>VOLUME</span>
+          <input id="cockpit-radio-volume" class="gev-quantitative-slider" type="range" min="0" max="100" value="80" aria-label="Cockpit Radio volume" :disabled="cockpit ? cockpit.volume.disabled : true" v-field-value="cockpit ? cockpit.volume.value : 80" data-i18n-aria-label />
+          <output id="cockpit-radio-volume-value" class="gev-slider-value" for="cockpit-radio-volume">{{ cockpit ? `${cockpit.volume.value}%` : '80%' }}</output>
+        </label>
+      </div>
+    </div>
+  </aside>
+</template>

src/ui/visualSettings.js

@@ -440,15 +440,11 @@ export class VisualSettings {
       !this._sliderPanel?.classList.contains('active')
     )
       return;
-    if (
-      openDisplay &&
-      this._cockpitDisplayToggleBtn?.getAttribute('aria-expanded') !== 'true'
-    ) {
+    if (openDisplay && !this._cockpitDisclosureOpen?.('display')) {
       this._setCockpitDisclosure?.('display', true);
       return;
     }
-    if (this._cockpitDisplayToggleBtn?.getAttribute('aria-expanded') !== 'true')
-      return;
+    if (!this._cockpitDisclosureOpen?.('display')) return;
     this._sliderPanel.classList.remove('collapsed');
     this._syncPanelCollapseButton(this._sliderPanel);
     this._lifetime.frame(() =>