dep: bump tailwindcss from 4.1.18 to 4.2.1 (#1479)

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:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -74,7 +74,7 @@
     "sass": "^1.97.3",
     "socket.io": "^4.8.3",
     "socket.io-client": "^4.8.3",
-    "tailwindcss": "^4.1.18"
+    "tailwindcss": "^4.2.1"
   },
   "devDependencies": {
     "@babel/core": "^7.29.0",