fix broken layout.tsx

frontend/package-lock.json

@@ -3255,7 +3255,7 @@
       "version": "19.0.0-rc.1",
       "resolved": "https://registry.npmjs.org/types-react/-/types-react-19.0.0-rc.1.tgz",
       "integrity": "sha512-RshndUfqTW6K3STLPis8BtAYCGOkMbtvYsi90gmVNDZBXUyUc5juf2PE9LfS/JmOlUIRO8cWTS/1MTnmhjDqyQ==",
-      "dev": true,
+      "devOptional": true,
       "dependencies": {
         "csstype": "^3.0.2"
       }
@@ -3265,7 +3265,7 @@
       "version": "19.0.0-rc.1",
       "resolved": "https://registry.npmjs.org/types-react-dom/-/types-react-dom-19.0.0-rc.1.tgz",
       "integrity": "sha512-VSLZJl8VXCD0fAWp7DUTFUDCcZ8DVXOQmjhJMD03odgeFmu14ZQJHCXeETm3BEAhJqfgJaFkLnGkQv88sRx0fQ==",
-      "dev": true,
+      "devOptional": true,
       "dependencies": {
         "@types/react": "*"
       }
@@ -7851,7 +7851,6 @@
       "version": "3.5.3",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.5.3.tgz",
       "integrity": "sha512-QQtaxnoDJeAkDvDKWCLiwIXkTgRhwYDEQCghU9Z6q03iyek/rxRh/2lC3HB7P8sWT2xC/y5JDctPLBIGzHKbhw==",
-      "dev": true,
       "license": "MIT",
       "bin": {
         "prettier": "bin/prettier.cjs"
@@ -9542,7 +9541,6 @@
       "version": "5.8.2",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.2.tgz",
       "integrity": "sha512-aJn6wq13/afZp/jT9QZmwEjDqqvSGp1VT5GVg+f/t6/oVyrgXM6BY1h9BRh/O5p3PlUPAe+WuiEZOmb/49RqoQ==",
-      "dev": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",

frontend/src/app/layout.tsx

@@ -1,5 +1,6 @@
 import Footer from "@/components/Footer";
 import Navbar from "@/components/Navbar";
+import QueryProvider from "@/components/query-provider"; // HINZUGEFÜGT
 import { ThemeProvider } from "@/components/theme-provider";
 import { Toaster } from "@/components/ui/sonner";
 import { analytics, basePath } from "@/config/siteConfig";
@@ -81,7 +82,9 @@ export default function RootLayout({
             <div className="flex min-h-screen flex-col justify-center">
               <div className="flex w-full justify-center">
                 <div className="w-full max-w-7xl ">
+                  <QueryProvider> {/* HINZUGEFÜGT */}
                     <NuqsAdapter>{children}</NuqsAdapter>
+                  </QueryProvider> {/* HINZUGEFÜGT */}
                   <Toaster richColors />
                 </div>
               </div>