build(deps-dev): Bump tailwindcss from 3.4.19 to 4.3.1 in /ui

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.19 to 4.3.1.
- [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/v4.3.1/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.3.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

ui/package.json

@@ -42,7 +42,7 @@
     "jsdom": "^25.0.0",
     "postcss": "^8.4.47",
     "prettier": "^3.3.0",
-    "tailwindcss": "^3.4.0",
+    "tailwindcss": "^4.3.1",
     "typescript": "^5.6.0",
     "typescript-eslint": "^8.8.0",
     "vite": "^6.0.0",