Bump tailwindcss from 4.0.13 to 4.1.8 in /web

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 4.0.13 to 4.1.8.
- [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/v4.1.8/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.1.8
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

web/package-lock.json

@@ -38,7 +38,7 @@
     "@vitejs/plugin-react": "^4.3.4",
     "postcss": "^8.5.3",
     "react-router-dom": "^7.3.0",
-    "tailwindcss": "^4.0.7",
+    "tailwindcss": "^4.1.8",
     "vite": "^6.3.5"
   }
 }