chore(ci): update test environment from jsdom to happy-dom for improved performance

Author: SteKoe

spring-boot-admin-server-ui/src/main/frontend/views/instances/sbomdependencytrees/tree.spec.ts

@@ -1,3 +1,6 @@
+/**
+ * @vitest-environment jsdom
+ */
 import { RenderResult, screen, waitFor } from '@testing-library/vue';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 

spring-boot-admin-server-ui/vite.config.mts

@@ -52,7 +52,7 @@ export default defineConfig(({ mode }) => {
     test: {
       root: __dirname,
       globals: true,
-      environment: 'jsdom',
+      environment: 'happy-dom',  // Faster than jsdom (~2-3x)
       setupFiles: [resolve(frontendDir, 'tests/setup.ts')],
       env: {
         LANG: 'de_DE.UTF-8',