diff --git a/admin.html b/admin.html
index 57c5d6c..f5a762a 100644
--- a/admin.html
+++ b/admin.html
@@ -438,7 +438,7 @@
     </div>
   </div>
 
-  <script src="assets/app_auth.js"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
   <script>
     let ALL_USERS = [];
 
diff --git a/assets/app_auth.js b/assets/app_auth.js
index c425b87..b509952 100644
--- a/assets/app_auth.js
+++ b/assets/app_auth.js
@@ -497,6 +497,10 @@
 
   // Auth Modal UI
   window.openAuthModal = function (initialMode = 'login', options = {}) {
+    if (window.AUTH && window.AUTH.isLoggedIn()) {
+      window.location.href = 'dashboard.html';
+      return;
+    }
     const allowClose = options.allowClose !== false;
     let modal = document.getElementById('auth-modal-overlay');
     if (modal) modal.remove();
@@ -679,13 +683,8 @@
         if (options.onSuccess) {
           options.onSuccess(result.user);
         } else {
-          window.AUTH.updateUI();
-          const p = window.location.pathname;
-          if (p.endsWith('index.html') || p === '/' || p.endsWith('/')) {
-            window.location.href = 'dashboard.html';
-          } else {
-            window.location.reload();
-          }
+          try { window.AUTH.updateUI(); } catch (e) {}
+          window.location.href = 'dashboard.html';
         }
       } else {
         errorBox.innerText = result.error || 'Fehler bei der Authentifizierung';
@@ -703,7 +702,11 @@
     const params = new URLSearchParams(window.location.search);
     const authParam = params.get('auth');
     if (authParam === 'login' || authParam === 'register') {
-      window.openAuthModal(authParam, { allowClose: true });
+      if (!window.AUTH.isLoggedIn()) {
+        window.openAuthModal(authParam, { allowClose: true });
+      } else {
+        window.location.replace('dashboard.html');
+      }
     }
   });
 })();
diff --git a/assets/course_sidebar.js b/assets/course_sidebar.js
index f8ccac7..aeb0b25 100644
--- a/assets/course_sidebar.js
+++ b/assets/course_sidebar.js
@@ -104,7 +104,7 @@
 
     if (!window.AUTH) {
       const authScript = document.createElement('script');
-      authScript.src = `${rootPrefix}assets/app_auth.js`;
+      authScript.src = `${rootPrefix}assets/app_auth.js?v=2.1.0`;
       authScript.onload = () => proceed();
       authScript.onerror = () => proceed();
       document.head.appendChild(authScript);
diff --git a/dashboard.html b/dashboard.html
index fcb75c3..70ad935 100644
--- a/dashboard.html
+++ b/dashboard.html
@@ -301,7 +301,7 @@
           <a href="workspace.html?course=python" class="portal-btn-primary" style="padding: 10px 18px; font-size: 0.9rem;">
             <span>💻 Web-IDE öffnen</span>
           </a>
-          <a href="index.html" class="portal-btn-secondary" style="padding: 10px 16px; font-size: 0.9rem;" title="Zur öffentlichen Plattform-Startseite">
+          <a href="index.html?view=landing" class="portal-btn-secondary" style="padding: 10px 16px; font-size: 0.9rem;" title="Zur öffentlichen Plattform-Startseite">
             <span>🌐 Startseite</span>
           </a>
         </div>
@@ -1152,7 +1152,7 @@
           <li><a href="#ihk-section" class="portal-footer-link">🎓 IHK Prüfungstrainer</a></li>
           <li><a href="workspace.html?course=python" class="portal-footer-link">💻 Web-IDE starten</a></li>
           <li><a href="#zertifikate-section" class="portal-footer-link">🏆 Meine Zertifikate</a></li>
-          <li><a href="index.html" class="portal-footer-link">🌐 Zur Plattform-Startseite</a></li>
+          <li><a href="index.html?view=landing" class="portal-footer-link">🌐 Zur Plattform-Startseite</a></li>
           <li class="teacher-only" style="display: none;"><a href="teacher.html" class="portal-footer-link" id="footer-teacher-link">👨‍🏫 Dozenten-Portal</a></li>
           <li class="admin-only" style="display: none;"><a href="admin.html" class="portal-footer-link" id="footer-admin-link">🛡️ Administration</a></li>
         </ul>
@@ -1185,10 +1185,10 @@
   </footer>
 
   <!-- Scripts -->
-  <script src="assets/app_auth.js"></script>
-  <script src="assets/it_ausbildungen_manifest.js"></script>
-  <script src="assets/courses_manifest.js"></script>
-  <script src="assets/certificate.js"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
+  <script src="assets/it_ausbildungen_manifest.js?v=2.1.0"></script>
+  <script src="assets/courses_manifest.js?v=2.1.0"></script>
+  <script src="assets/certificate.js?v=2.1.0"></script>
 
   <script>
     function toggleMobileMenu() {
diff --git a/datenschutz.html b/datenschutz.html
index ae8341d..7108c5f 100644
--- a/datenschutz.html
+++ b/datenschutz.html
@@ -276,7 +276,7 @@
   </footer>
 
   <!-- Scripts -->
-  <script src="assets/app_auth.js"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
   <script>
     function toggleMobileMenu() {
       const drawer = document.getElementById('portal-mobile-drawer');
diff --git a/impressum.html b/impressum.html
index 31572ed..dccf297 100644
--- a/impressum.html
+++ b/impressum.html
@@ -230,7 +230,7 @@
   </footer>
 
   <!-- Scripts -->
-  <script src="assets/app_auth.js"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
   <script>
     function toggleMobileMenu() {
       const drawer = document.getElementById('portal-mobile-drawer');
diff --git a/index.html b/index.html
index 487be80..e655554 100644
--- a/index.html
+++ b/index.html
@@ -11,6 +11,20 @@
   <meta property="og:type" content="website">
   <meta property="og:url" content="https://alpha.it-praxisportal.de/">
   <link rel="stylesheet" href="assets/style.css">
+  <script src="assets/app_auth.js?v=2.1.0"></script>
+  <script>
+    // Sofortige automatische Weiterleitung für angemeldete Nutzer direkt ins Dashboard
+    (function autoRedirectLoggedInUser() {
+      try {
+        if (window.AUTH && window.AUTH.isLoggedIn()) {
+          var p = new URLSearchParams(window.location.search);
+          if (!p.has('view') && !p.has('landing') && !p.has('preview')) {
+            window.location.replace('dashboard.html');
+          }
+        }
+      } catch (e) {}
+    })();
+  </script>
   <style>
     .portal-container {
       max-width: 1240px;
@@ -821,7 +835,6 @@
   </footer>
 
   <!-- Scripts -->
-  <script src="assets/app_auth.js"></script>
   <script>
     function toggleMobileMenu() {
       const drawer = document.getElementById('portal-mobile-drawer');
diff --git a/teacher.html b/teacher.html
index 7dbca50..744e103 100644
--- a/teacher.html
+++ b/teacher.html
@@ -279,9 +279,9 @@
     </div>
   </div>
 
-  <script src="assets/app_auth.js"></script>
-  <script src="assets/courses_manifest.js"></script>
-  <script src="assets/it_ausbildungen_manifest.js"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
+  <script src="assets/courses_manifest.js?v=2.1.0"></script>
+  <script src="assets/it_ausbildungen_manifest.js?v=2.1.0"></script>
 
   <script>
     // 🔒 1. STRIKTER ROLLEN-GUARD FÜR DOZENTEN / ADMINS
diff --git a/workspace.html b/workspace.html
index 8927e75..1014ef2 100644
--- a/workspace.html
+++ b/workspace.html
@@ -353,8 +353,8 @@
   <script src="assets/gamification_data.js"></script>
   <script src="assets/gamification.js"></script>
   <script src="assets/interpreter.js"></script>
-  <script src="assets/certificate.js"></script>
-  <script src="assets/app_auth.js"></script>
+  <script src="assets/certificate.js?v=2.1.0"></script>
+  <script src="assets/app_auth.js?v=2.1.0"></script>
   <script src="assets/parsons.js"></script>
   <script src="assets/code_guard.js"></script>
   <script src="assets/runners/runner_registry.js"></script>