simplify application and remove window references

public/js/bootstrap-loader.js

@@ -41,7 +41,7 @@
   }
 
   function initializeJqueryUi() {
-    const $ = window.jQuery;
+    const $ = globalThis.jQuery;
     $('#bootstrap-retry').button({ icon: 'ui-icon-refresh' });
     $('.back-button').button();
     $('#clear-route-search').button({ icon: 'ui-icon-close', showLabel: false });
@@ -56,7 +56,7 @@
     try {
       await loadScript(
         `vendor/jquery/jquery-${versions.jquery}.min.js`,
-        () => window.jQuery?.fn?.jquery === versions.jquery
+        () => globalThis.jQuery?.fn?.jquery === versions.jquery
       );
       mark('jquery', 'done');
 
@@ -64,20 +64,20 @@
       await loadStyle('css/app.css');
       await loadScript(
         `vendor/jquery-ui/jquery-ui-${versions.jqueryUi}.min.js`,
-        () => window.jQuery?.ui?.version === versions.jqueryUi
+        () => globalThis.jQuery?.ui?.version === versions.jqueryUi
       );
       initializeJqueryUi();
       mark('jquery-ui', 'done');
 
       for (const module of ['config', 'api-client', 'distance', 'geolocation', 'orientation', 'slideshow', 'audio-player', 'vibration', 'app']) {
-        await loadScript(`js/${module}.js`, () => Boolean(window.Wegwichtel));
+        await loadScript(`js/${module}.js`, () => Boolean(globalThis.Wegwichtel));
       }
       mark('modules', 'done');
 
-      await window.Wegwichtel.App.initialize({ markStep: mark });
+      await globalThis.Wegwichtel.App.initialize({ markStep: mark });
       document.getElementById('bootstrap-screen').hidden = true;
       document.getElementById('app-shell').hidden = false;
-      window.Wegwichtel.App.navigate('#routes-page', { replace: true });
+      globalThis.Wegwichtel.App.navigate('#routes-page', { replace: true });
     } catch (error) {
       console.error(error);
       const current = steps.find(step => !document.querySelector(`[data-step="${step}"]`)?.classList.contains('done'));