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/materialSymbolsSubset.test.mjs

@@ -20,9 +20,8 @@ const ICON_PROPERTY = /\bicon:\s*['"]([a-z0-9_]+)['"]/g;
 /**
  * Files that SHIP markup. Tests assert on markup, they do not render it.
  *
- * The panel markup lives in `src/ui/templates/*.html`, so HTML under `src` is
- * read as well: a glyph named only in a template is still a glyph the font has
- * to carry.
+ * The panel markup lives in Vue views under `src`, so markup there is read as
+ * well: a glyph named only in a view is still a glyph the font has to carry.
  */
 function sourceFiles(directory = SRC_ROOT) {
   const files = [];