Routen in eigene Datei ausgelagert

AppRoutes in src/routes.tsx, damit die Tests die echte Routenliste im
MemoryRouter rendern können. Keine Verhaltensänderung. setup.ts bekommt
Attrappen für IntersectionObserver und ResizeObserver (jsdom kennt sie nicht).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/App.tsx

@@ -3,18 +3,10 @@ import { Toaster as Sonner } from "@/components/ui/sonner";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useEffect } from "react";
-import { BrowserRouter, Routes, Route, useLocation } from "react-router-dom";
+import { BrowserRouter, useLocation } from "react-router-dom";
 import { ThemeProvider } from "@/components/ThemeProvider";
 import { AnalyticsProvider } from "@/components/AnalyticsProvider";
-import Index from "./pages/Index";
-import ContactPage from "./pages/Contact";
-import AGBPage from "./pages/AGB";
-import ImpressumPage from "./pages/Impressum";
-import AboutPage from "./pages/About";
-import WartungsAboPage from "./pages/WartungsAbo";
-import HostingAboPage from "./pages/HostingAbo";
-import DatenschutzPage from "./pages/Datenschutz";
-import NotFound from "./pages/NotFound";
+import { AppRoutes } from "./routes";
 
 const queryClient = new QueryClient();
 
@@ -36,18 +28,7 @@ const App = () => (
         <BrowserRouter future={{ v7_startTransition: true, v7_relativeSplatPath: true }}>
           <ScrollToTop />
           <AnalyticsProvider>
-          <Routes>
-            <Route path="/" element={<Index />} />
-            <Route path="/kontakt" element={<ContactPage />} />
-            <Route path="/agb" element={<AGBPage />} />
-            <Route path="/impressum" element={<ImpressumPage />} />
-            <Route path="/ueber-uns" element={<AboutPage />} />
-            <Route path="/wartungs-abo" element={<WartungsAboPage />} />
-            <Route path="/hosting-abo" element={<HostingAboPage />} />
-            <Route path="/datenschutz" element={<DatenschutzPage />} />
-            {/* ADD ALL CUSTOM ROUTES ABOVE THE CATCH-ALL "*" ROUTE */}
-            <Route path="*" element={<NotFound />} />
-          </Routes>
+          <AppRoutes />
           </AnalyticsProvider>
         </BrowserRouter>
       </TooltipProvider>