fix sonar findings and translation structure

test/app-route-control-runtime.test.js

@@ -224,7 +224,7 @@ function route(id, name, source = 'server') {
   };
 }
 
-async function loadApp() {
+async function loadApp({ language = 'de-DE' } = {}) {
   const sourcePath = path.join(root, 'public/js/app.js');
   const source = await fs.readFile(sourcePath, 'utf8');
   const harness = createHarness();
@@ -299,6 +299,7 @@ async function loadApp() {
 
   context.addEventListener = (name, handler) => harness.globalListeners.set(name, handler);
   context.globalThis = context;
+  context.navigator = { language };
 
   await loadI18n(context);
 
@@ -318,6 +319,17 @@ async function loadApp() {
   };
 }
 
+test('English browser settings localize app controls and retain user-authored trail names', async () => {
+  const { context, harness } = await loadApp({ language: 'en-GB' });
+  await context.Wegwichtel.App.initialize({ markStep() {} });
+  assert.equal(harness.node('#route-control-title').textValue, 'Choose a trail');
+  assert.equal(harness.node('#route-control-server-title').textValue, 'Public trails (1)');
+  assert.equal(harness.node('#route-control-local-title').textValue, 'My drafts (1)');
+  assert.match(harness.node('#location-hint').textValue, /You can still choose from all trails/);
+  assert.ok(harness.node('#all-route-list').appended.join('').includes('Serverweg'));
+  assert.ok(harness.node('#local-route-list').appended.join('').includes('Lokaler Weg'));
+});
+
 test('route control runtime loads server/local routes and supports switching without geolocation', async () => {
   const setup = await loadApp();
   const { context, harness, apiCalls, editor } = setup;