👍 Updates app unit test suite

app/vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig, UserConfigExport } from 'vitest/config'
+import { svelte } from '@sveltejs/vite-plugin-svelte';
+
+
+const config: UserConfigExport =
+{
+ plugins: [svelte()],
+ test: {
+   globals: true,
+   environment: 'jsdom',
+ }
+}
+export default defineConfig(config)