chore: bump vitest to v4 beta

Author: json-q

package.json

@@ -23,7 +23,7 @@
     "@testing-library/react": "^16.3.0",
     "@types/fs-extra": "^11.0.4",
     "@types/node": "^22.18.0",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.0-beta.8",
     "fs-extra": "^11.3.1",
     "jsdom": "^26.1.0",
     "lefthook": "^1.12.3",
@@ -33,6 +33,6 @@
     "tsx": "^4.20.5",
     "turbo": "^2.5.6",
     "typescript": "^5.9.2",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0-beta.8"
   }
 }