feat: integrate XSLT Tools with toolbox portal

vite.config.ts

@@ -2,7 +2,11 @@ import { defineConfig } from 'vite';
 import react from '@vitejs/plugin-react';
 
 export default defineConfig({
+  base: './',
   plugins: [react()],
+  resolve: {
+    dedupe: ['react', 'react-dom'],
+  },
   server: {
     host: true,
     allowedHosts: ['xslttools.add-ideas.de'], // ← ADD THIS