front: bump tailwindcss from 4.1.18 to 4.2.1 in /front

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 4.1.18 to 4.2.1.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.1/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

front/package-lock.json

@@ -49,7 +49,7 @@
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "jsdom": "^28.1.0",
-    "tailwindcss": "^4.1.13",
+    "tailwindcss": "^4.2.1",
     "vitest": "^4.0.18"
   }
 }