feat(ui): render the ORBIT indicator from the location tray

LocationControls offers the indicator with showOrbit(active) in its
presented tray instead of building it on the body, and the scene chrome
teleports it there. Orbit toggles, including the voice switch, light it
through the controls.

src/ui/commandDock.test.mjs

@@ -161,6 +161,45 @@ test('the map source row renders the published chips and selects through the con
   assert.equal(document.querySelectorAll('.map-stack-chip').length, 0);
 });
 
+test('the ORBIT indicator sits on the body while offered and lights while orbiting', async (t) => {
+  const { $, pinia } = fixture(t);
+  assert.equal($('#orbit-indicator'), null);
+  const store = useLocationStore(pinia);
+  const controls = new LocationControls({
+    elements: {
+      search: $('#location-search'),
+      searchToggle: $('#search-toggle'),
+      resetButtons: [],
+    },
+    cities: {},
+    getExpandedCity: () => null,
+    onCity() {},
+    onPoi() {},
+    onSearch() {},
+    onReset() {},
+    publish: (view) => store.publish(view),
+    requestFrame() {},
+    cancelFrame() {},
+  });
+  controls.showOrbit(false);
+  await nextTick();
+  const indicator = $('#orbit-indicator');
+  assert.equal(indicator.parentElement, document.body);
+  assert.equal(indicator.textContent, '↻ ORBIT');
+  assert.equal(indicator.querySelector('.orbit-icon').textContent, '↻');
+  assert.equal(indicator.classList.contains('active'), false);
+  controls.showOrbit(true);
+  await nextTick();
+  assert.equal(indicator.classList.contains('active'), true);
+  controls.showOrbit(false);
+  await nextTick();
+  assert.equal(indicator.classList.contains('active'), false);
+  assert.ok($('#orbit-indicator') === indicator, 'stopping keeps it in place');
+  controls.destroy();
+  await nextTick();
+  assert.equal($('#orbit-indicator'), null);
+});
+
 test('the location tray renders what LocationControls publishes', async (t) => {
   const { $, pinia } = fixture(t);
   assert.equal($('#location-mini-city').textContent, '📍 Location: --');