Merge branch 'refactor2'

client/package.json

@@ -10,7 +10,9 @@
     "preview": "vite preview",
     "lint:fix": "eslint . --fix",
     "format": "prettier . --write --ignore-unknown",
-    "format:check": "prettier . --check --ignore-unknown"
+    "format:check": "prettier . --check --ignore-unknown",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@emotion/react": "^11.14.0",
@@ -34,6 +36,9 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.4",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/node": "^24.12.2",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -49,9 +54,11 @@
     "eslint-plugin-react-hooks": "^7.1.1",
     "eslint-plugin-react-refresh": "^0.5.2",
     "globals": "^17.5.0",
+    "jsdom": "^26.1.0",
     "prettier": "^3.8.3",
     "typescript": "~6.0.2",
     "typescript-eslint": "^8.58.2",
-    "vite": "^8.0.10"
+    "vite": "^8.0.10",
+    "vitest": "^3.2.4"
   }
 }