Add missing test dependencies (vitest, testing-library, jsdom)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Raushan kumar

package.json

@@ -21,6 +21,8 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.3.0",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^5.1.1",
@@ -29,8 +31,10 @@
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.4.24",
     "globals": "^16.5.0",
+    "jsdom": "^26.1.0",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.1.18",
-    "vite": "^7.2.4"
+    "vite": "^7.2.4",
+    "vitest": "^3.1.4"
   }
 }