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.

src/reasonableDefaults.test.mjs

@@ -92,7 +92,7 @@ test('first run opens with Scope ON and 100% feather at every default surface',
   assert.match(indexHtml, /id="scope-feather-value"[^>]*>100%</,
     'index.html: and its readout agrees with the handle');
 
-  assert.match(indexHtml, /<input type="checkbox" id="scope-toggle"[^>]*\schecked\s*\/>/,
+  assert.match(indexHtml, /<input type="checkbox" id="scope-toggle"[^>]*\schecked\s*\/?>/,
     'the native Scope checkbox starts checked');
 
   // The link this session generates must describe the mask this session draws,