feat(ui): render application templates as Vue views mounted before wiring

Templates listed in build/applicationViews.js expand to mount hosts, and
mountApplicationViews() renders them before translation and wiring. Markup
tests read the page through a server-side render helper, the i18n scanner
reads view templates, and Vue preserves whitespace so views keep the exact
DOM. No template is converted yet.

src/overlays/worldOverlay.test.mjs

@@ -1,5 +1,5 @@
 import { createNamedMarkers } from '../layers/installations/namedMarkers.js';
-import { expandApplicationHtml } from '../../build/application-html.js';
+import { renderApplicationHtml } from '../testSupport/applicationHtml.mjs';
 import { readStylesheet } from '../testSupport/readStylesheet.mjs';
 import test from 'node:test';
 import assert from 'node:assert/strict';
@@ -447,7 +447,7 @@ test('destroying before the first init leaves pre-init buffering intact', () =>
   env.cleanup();
 });
 
-test('lifecycle is idempotent and teardown removes listeners, observers, and DOM', () => {
+test('lifecycle is idempotent and teardown removes listeners, observers, and DOM', async () => {
   const env = installMockEnvironment();
   assert.equal(env.document.getElementById('world-overlay-detection-surface'), null);
   initWorldOverlay(env.viewer);
@@ -465,7 +465,7 @@ test('lifecycle is idempotent and teardown removes listeners, observers, and DOM
   assert.deepEqual(root.children, [canvas],
     'the overlay root carries only the shared card canvas');
   assert.doesNotMatch(
-    expandApplicationHtml(readFileSync(new URL('../../index.html', import.meta.url), 'utf8')),
+    await renderApplicationHtml(readFileSync(new URL('../../index.html', import.meta.url), 'utf8')),
     /world-overlay-detection-surface/,
     'the surface is runtime host-owned, not static markup',
   );