fix sonar findings and translation structure

test/route-selection-ui.test.js

@@ -56,7 +56,7 @@ test('persistent route control displays the next unvisited Station and preserves
   const app = await read('public/js/app.js');
 
   assert.match(app, /function nextPoiMetric\(/);
-  assert.match(app, /I18n\.t\("app\.nachste\.station", \{ value1: metric\.poi\.title, value2: distance \}\)/);
+  assert.match(app, /I18n\.t\("app\.next-station-summary", \{ value1: metric\.poi\.title, value2: distance \}\)/);
   assert.match(app, /state\.triggered\.has\(poi\.id\)/);
   assert.match(app, /function suspendCurrentRoute\(/);
   assert.match(app, /persistRouteProgress\(\)/);