refactor(app): share application components and request services

src/mapStackChips.test.mjs

@@ -1,3 +1,4 @@
+import { expandApplicationHtml } from '../build/application-html.js';
 import { readStylesheet } from './testSupport/readStylesheet.mjs';
 // MAP STACK chip row — the dropdown's replacement control surface.
 //
@@ -481,7 +482,9 @@ test('the keyboard focus ring survives on the ACTIVE chip', () => {
 });
 
 test('the Visual Presets tray owns Map Source and the retired left panel is absent', () => {
-  const html = readFileSync(new URL('../index.html', import.meta.url), 'utf8');
+  const html = expandApplicationHtml(
+    readFileSync(new URL('../index.html', import.meta.url), 'utf8'),
+  );
   const ui = readFileSync(
     new URL('./ui/applicationShell.js', import.meta.url),
     'utf8',