feat(ui): render every application template except the loading screen as a Vue view

The scene chrome, cockpit, Display controls, command dock, layer panels,
Context rail, welcome card and Provider Settings move verbatim into
src/ui/views and mount into their hosts before the page is translated and
wired. Each view renders the same elements, attributes and text as its
template; Vue keeps whitespace between elements as one space, and no view
markup sits under a white-space: pre rule.

Template asset URLs stay literal, view files are left out of Prettier so
the markup is not reflowed, and the Node component loader moves to build/
and is exported as build/register-vue for host test runners. Hosts that do
not initialize Core's locale pass localePicker: false instead of editing
the markup.

scripts/qa-voice-auth-focus.mjs

@@ -12,10 +12,14 @@ import { after, before, test } from 'node:test';
 import puppeteer from 'puppeteer';
 
 const root = new URL('../', import.meta.url);
-const template = await readFile(
-  new URL('src/ui/templates/provider-settings.html', root),
+const view = await readFile(
+  new URL('src/ui/views/ProviderSettingsView.vue', root),
   'utf8',
 );
+const template = view.slice(
+  view.indexOf('<template>') + '<template>'.length,
+  view.lastIndexOf('</template>'),
+);
 const assets = new Set([
   '/src/keySetup.js',
   '/src/voice/cloudVoiceAuth.js',