chore(deps): bump next from 14.2.7 to 15.0.3 in /ui

Bumps [next](https://github.com/vercel/next.js) from 14.2.7 to 15.0.3.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.7...v15.0.3)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

ui/package.json

@@ -12,7 +12,7 @@
     "@bgd-labs/react-web3-icons": "^1.4.7",
     "@leeoniya/ufuzzy": "^1.0.14",
     "clsx": "^2.1.1",
-    "next": "14.2.7",
+    "next": "15.0.3",
     "react": "^18",
     "react-dom": "^18",
     "tailwind-merge": "^2.5.2",