chore(deps): update vitest monorepo to v4

server/package.json

@@ -144,7 +144,7 @@
     "@types/supertest": "^6.0.0",
     "@types/ua-parser-js": "^0.7.36",
     "@types/validator": "^13.15.2",
-    "@vitest/coverage-v8": "^3.0.0",
+    "@vitest/coverage-v8": "^4.0.0",
     "eslint": "^9.14.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-prettier": "^5.1.3",
@@ -163,7 +163,7 @@
     "typescript-eslint": "^8.28.0",
     "unplugin-swc": "^1.4.5",
     "vite-tsconfig-paths": "^5.0.0",
-    "vitest": "^3.0.0"
+    "vitest": "^4.0.0"
   },
   "volta": {
     "node": "24.11.1"