refactor(app): share application components and request services

src/data/layerState.test.mjs

@@ -1,3 +1,4 @@
+import { expandApplicationHtml } from '../../build/application-html.js';
 import { readLayerSource } from '../testSupport/readLayerSource.mjs';
 import test from 'node:test';
 import assert from 'node:assert/strict';
@@ -377,7 +378,7 @@ test('a fresh boot starts 3D aircraft ON in proximity — codec, both layers, an
     'ui.js: the DISPLAY rail believes 3D is on before any layer-state sync arrives');
   assert.match(ui, /this\.(?:flightState\.)?_models3dMode = 'proximity';/,
     'ui.js: and believes the mode is proximity');
-  const html = await readFile(new URL('../../index.html', import.meta.url), 'utf8');
+  const html = expandApplicationHtml(await readFile(new URL('../../index.html', import.meta.url), 'utf8'));
   assert.match(html, /class="pp-toggle-btn active" id="models3d-toggle" aria-pressed="true"/,
     'index.html: the 3D button paints lit on first paint, before ui.js runs — and says so');
   assert.match(ui, /this\._models3dBtn\?\.setAttribute\(\s*'aria-pressed',\s*String\(this\.(?:flightState\.)?_models3dEnabled\),?\s*\)/,