hotfix: resolve double header on referenzen page and fix hash link scroll bug

components/ui/TransitionLink.tsx

@@ -24,6 +24,11 @@ export function TransitionLink({ children, href, onClick, transitionMessage, ...
       return;
     }
 
+    // Hash links on the same page should not trigger a transition
+    if (href.toString().startsWith('#')) {
+      return;
+    }
+
     // Default Link Navigation blockieren
     e.preventDefault();