chore(deps-dev): bump tailwindcss from 3.4.17 to 4.1.16

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.17 to 4.1.16.
- [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/v4.1.16/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.1.16
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/frontend/package.json

@@ -49,7 +49,7 @@
     "svelte-fa": "^4.0.4",
     "svelte-markdown": "^0.4.1",
     "svelte-preprocess": "^6.0.2",
-    "tailwindcss": "^3.4.10",
+    "tailwindcss": "^4.1.16",
     "vite": "^7.1.12",
     "vitest": "^2.0.2"
   }