fix Analyse

backend/server.js

@@ -40,6 +40,20 @@ app.use('/api/auth', authRouter);
 app.use('/api/recipes', recipesRouter);
 app.use('/api/analytics', authMiddleware, adminMiddleware, analyticsRouter);
 
+app.use((err, req, res, next) => {
+  console.error('Server Fehler:', err.message);
+  if (!res.headersSent) {
+    res.status(500).json({ error: 'Interner Serverfehler' });
+  }
+});
+
+process.on('uncaughtException', (err) => {
+  console.error('Uncaught Exception:', err.message);
+});
+process.on('unhandledRejection', (err) => {
+  console.error('Unhandled Rejection:', err?.message || err);
+});
+
 const adminUser = process.env.ADMIN_USER || 'admin';
 const adminPass = process.env.ADMIN_PASS || 'admin123';