refactor: isolate camera panel controls and presentation

src/cctvFocusPolicy.test.mjs

@@ -95,3 +95,25 @@ test('CCTV disable transition does not emit enable-ownership diagnostics', async
   assert.deepEqual(transitions, [false]);
   assert.deepEqual(diagnostics, []);
 });
+
+
+test('a disposed UI cannot activate a camera when enabling finishes late', async () => {
+  let release;
+  let disposed = false;
+  let activations = 0;
+  const pending = runCctvLayerEnableTransition({
+    target: true,
+    setEnabled: () => new Promise((resolve) => { release = resolve; }),
+    readOwnership: () => ({}),
+    shouldFocus: () => !disposed,
+    activate: () => { activations++; return 'camera-a'; },
+    fly: () => assert.fail('disposed UI must not fly'),
+    debug: () => {},
+  });
+  disposed = true;
+  release();
+  await pending;
+  assert.equal(activations, 0);
+  const uiSource = readFileSync(new URL('./ui.js', import.meta.url), 'utf8');
+  assert.match(uiSource, /shouldFocus: \(\) => !this\._disposed && this\._dataManager\.isEnabled\('cctv'\)/);
+});