refactor: compose UI shell with explicit application operations and component owners

src/data/detectionHost.test.mjs

@@ -671,7 +671,7 @@ test('pathological detection paint holds alternate frames without freezing share
 
 test('detection cannot resurrect a private canvas, listener, matrix, resize, clear, or UI inventory', () => {
   const source = readFileSync(new URL('./detection.js', import.meta.url), 'utf8');
-  const uiSource = readFileSync(new URL('../ui.js', import.meta.url), 'utf8')
+  const uiSource = readFileSync(new URL('../ui/applicationShell.js', import.meta.url), 'utf8')
   + '\n' + readFileSync(new URL('../ui/visualPresets.js', import.meta.url), 'utf8');
   assert.doesNotMatch(source, /createElement\(\s*['"]canvas['"]\s*\)/);
   assert.doesNotMatch(source, /postRender\.addEventListener/);

src/data/layerState.test.mjs

@@ -371,7 +371,7 @@ test('a fresh boot starts 3D aircraft ON in proximity — codec, both layers, an
     assert.match(source, /^let _models3dMode = 'proximity';/m,
       `${name}: and starts in proximity, matching the codec default`);
   }
-  const ui = await readFile(new URL('../ui.js', import.meta.url), 'utf8');
+  const ui = await readFile(new URL('../ui/applicationShell.js', import.meta.url), 'utf8');
   assert.match(ui, /^\s*this\._models3dEnabled = true;$/m,
     'ui.js: the DISPLAY rail believes 3D is on before any layer-state sync arrives');
   assert.match(ui, /this\._models3dMode = 'proximity';/,

src/data/tr3bRegistry.test.mjs

@@ -270,7 +270,7 @@ test('conversions are session-scoped and no lifecycle path clears them', async (
   // personally clicked, and re-tracking the same aircraft after a layer restart
   // should still show the triangle. Only a page reload resets it — so no
   // production code may clear the registry.
-  for (const name of ['flights.js', 'militaryFlights.js', '../ui.js']) {
+  for (const name of ['flights.js', 'militaryFlights.js', '../ui/applicationShell.js']) {
     const source = await readFile(new URL(`./${name}`, import.meta.url), 'utf8');
     assert.doesNotMatch(source, /clearTr3bRegistry/,
       `${name}: teardown must not clear session conversions`);