chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -65,7 +65,7 @@
     "typescript": "^5.8.3",
     "unbuild": "^3.5.0",
     "vite": "^7.1.3",
-    "vitest": "^3.1.2"
+    "vitest": "^4.0.0"
   },
   "pnpm": {
     "onlyBuiltDependencies": [