tests ready

frontend/package.json

@@ -6,17 +6,23 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "devDependencies": {
     "@sveltejs/adapter-static": "^3.0.10",
     "@sveltejs/kit": "^2.49.2",
     "@sveltejs/vite-plugin-svelte": "^6.2.1",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/svelte": "^5.3.1",
     "autoprefixer": "^10.4.0",
+    "jsdom": "^28.1.0",
     "postcss": "^8.4.0",
     "svelte": "^5.43.8",
     "tailwindcss": "^3.0.0",
-    "vite": "^7.2.4"
+    "vite": "^7.2.4",
+    "vitest": "^4.0.18"
   },
   "dependencies": {
     "date-fns": "^4.1.0"