Update Vitest configuration for improved UI experience

- Added 'ui' and 'open' options to the Vitest configuration to enable the user interface and automatically open it upon running tests.

vitest.config.js

@@ -9,6 +9,8 @@ export default defineConfig({
         environment: "jsdom",
         include: ["tests/frontend/**/*.{test,spec}.{js,ts,jsx,tsx}"],
         setupFiles: ["tests/frontend/setup.js"],
+        ui: true,
+        open: true,
     },
     resolve: {
         alias: {