test: add vitest coverage for components (#20)

Author: JavaZeroo

package-lock.json

@@ -26,6 +26,9 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.25.0",
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.3.0",
+    "@testing-library/user-event": "^14.6.1",
     "@types/react": "^19.1.2",
     "@types/react-dom": "^19.1.2",
     "@vitejs/plugin-react": "^4.4.1",