Bump vitest from 4.0.5 to 4.0.6 in /packages/frontend

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 4.0.5 to 4.0.6.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.6/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.0.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/frontend/package-lock.json

@@ -81,6 +81,6 @@
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.46.3",
     "vite": "^7.1.12",
-    "vitest": "^4.0.4"
+    "vitest": "^4.0.6"
   }
 }