chore(deps-dev): Bump shadcn from 4.0.3 to 4.0.8 in /frontend (#50)

Bumps [shadcn](https://github.com/shadcn-ui/ui/tree/HEAD/packages/shadcn) from 4.0.3 to 4.0.8.
- [Release notes](https://github.com/shadcn-ui/ui/releases)
- [Changelog](https://github.com/shadcn-ui/ui/blob/main/packages/shadcn/CHANGELOG.md)
- [Commits](https://github.com/shadcn-ui/ui/commits/shadcn@4.0.8/packages/shadcn)

---
updated-dependencies:
- dependency-name: shadcn
  dependency-version: 4.0.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

frontend/package-lock.json

@@ -24,7 +24,7 @@
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^5.1.4",
-    "shadcn": "^4.0.3",
+    "shadcn": "^4.0.8",
     "tailwindcss": "^4.0.0",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.7.0",