fix(app): align Settings controls and version metadata

The editor select referenced an undefined style class, and the renderer hard-coded 0.1.0 instead of reading Electron app metadata.

tests/settings-view.test.mjs

@@ -0,0 +1,19 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+
+const source = readFileSync(
+  new URL('../app/src/renderer/src/views/Settings.vue', import.meta.url),
+  'utf8',
+);
+
+test('Settings reads the displayed version from the settings payload', () => {
+  assert.doesNotMatch(source, /const version = ref\(['"]0\.1\.0['"]\)/);
+  assert.match(source, /version\.value = s\.version/);
+});
+
+test('Editor selector uses the themed Settings control vocabulary', () => {
+  assert.match(source, /<select class="path-field select-field"/);
+  assert.match(source, /\.select-field\s*\{[^}]*appearance:\s*none/s);
+  assert.match(source, /\.select-control::after\s*\{/);
+});