Bump tailwindcss from 4.0.12 to 4.1.5 in /frontend (#1265)

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 4.0.12 to 4.1.5.
- [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/v4.1.5/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.1.5
  dependency-type: direct:development
  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]

frontend/package.json

@@ -56,7 +56,7 @@
     "postcss": "^8.5.3",
     "prettier": "^3.5.3",
     "react-dropzone": "^14.3.8",
-    "tailwindcss": "^4.0.7",
+    "tailwindcss": "^4.1.5",
     "typescript": "^5.7.3",
     "vite": "^4.5.3"
   }

frontend/yarn.lock

@@ -6698,11 +6698,16 @@ tabbable@^6.0.0:
   resolved "https://registry.yarnpkg.com/tabbable/-/tabbable-6.2.0.tgz#732fb62bc0175cfcec257330be187dcfba1f3b97"
   integrity sha512-Cat63mxsVJlzYvN51JmVXIgNoUokrIaT2zLclCXjRd8boZ0004U4KCs/sToJ75C6sdlByWxpYnb5Boif1VSFew==
 
-tailwindcss@4.0.12, tailwindcss@^4.0.7:
+tailwindcss@4.0.12:
   version "4.0.12"
   resolved "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-4.0.12.tgz#71ab22c78810303b1156354bcc561a747169b5bd"
   integrity sha512-bT0hJo91FtncsAMSsMzUkoo/iEU0Xs5xgFgVC9XmdM9bw5MhZuQFjPNl6wxAE0SiQF/YTZJa+PndGWYSDtuxAg==
 
+tailwindcss@^4.1.5:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-4.1.5.tgz#d35607f1a351051bd29cda7e59ab2c222ca8deb6"
+  integrity sha512-nYtSPfWGDiWgCkwQG/m+aX83XCwf62sBgg3bIlNiiOcggnS1x3uVRDAuyelBFL+vJdOPPCGElxv9DjHJjRHiVA==
+
 tapable@^2.2.0:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/tapable/-/tapable-2.2.1.tgz#1967a73ef4060a82f12ab96af86d52fdb76eeca0"