feat: dynamic browser tab titles

Update document title based on the active route and author persona for better SEO and user context.

src/App.tsx

@@ -38,6 +38,23 @@ export default function App() {
       });
   }, []);
 
+  // Dynamisch den Dokumententitel (Browsertab-Titel) basierend auf Pfad und Autorendaten anpassen
+  useEffect(() => {
+    if (!authorData) {
+      document.title = "Lade Autoren-Portfolio...";
+      return;
+    }
+    if (currentPath === "/admin" || currentPath.startsWith("/admin/")) {
+      document.title = "Admin-Zentrale | Autor-Suiten";
+    } else if (currentPath === "/sensual-moments" || currentPath.startsWith("/sensual-moments/")) {
+      document.title = authorData.erotica.name || "Marc Velvet";
+    } else if (currentPath === "/clara-finch" || currentPath.startsWith("/clara-finch/")) {
+      document.title = authorData.clara.name || "Clara Finch";
+    } else {
+      document.title = authorData.scifi.name || "Daniel Hesse";
+    }
+  }, [currentPath, authorData]);
+
   const handleAdminLogout = () => {
     // Relocate to landing site after administration work
     window.history.pushState({}, "", "/");