code spliting und language 2

vite.config.js

@@ -3,6 +3,19 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
+  build: {
+    chunkSizeWarningLimit: 600,
+    rollupOptions: {
+      output: {
+        manualChunks: {
+          'vendor-react': ['react', 'react-dom'],
+          'vendor-supabase': ['@supabase/supabase-js'],
+          'vendor-ui': ['lucide-react', 'country-flag-icons'],
+          'vendor-xlsx': ['xlsx'],
+        },
+      },
+    },
+  },
   test: {
     environment: 'node',
     include: ['src/**/*.test.{js,jsx}']