Bump tailwindcss from 3.4.3 to 4.1.12 in /frontend

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.3 to 4.1.12.
- [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/v4.1.12/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.1.12
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package.json

@@ -81,7 +81,7 @@
     "autoprefixer": "^10.4.20",
     "jest": "^29.7.0",
     "postcss": "^8.4.35",
-    "tailwindcss": "^3.3.5",
+    "tailwindcss": "^4.1.12",
     "tailwindcss-blend-mode": "^1.0.0",
     "ts-jest": "^27.0.4",
     "typescript": "^5.5.4"