frontend: add test case

Author: u-hossy

frontend/package.json

@@ -8,7 +8,8 @@
     "build": "tsc -b && vite build",
     "preview": "vite preview",
     "check": "biome check",
-    "check:fix": "biome check --write"
+    "check:fix": "biome check --write",
+    "test": "vitest"
   },
   "dependencies": {
     "@radix-ui/react-slot": "^1.2.3",
@@ -30,7 +31,8 @@
     "globals": "^16.4.0",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.9.3",
-    "vite": "npm:rolldown-vite@7.1.14"
+    "vite": "npm:rolldown-vite@7.1.14",
+    "vitest": "^4.0.3"
   },
   "pnpm": {
     "overrides": {