chore(deps): update shadcn requirement from ^4.15.0 to ^4.16.0

Updates the requirements on [shadcn](https://github.com/shadcn-ui/ui/tree/HEAD/packages/shadcn) to permit the latest version.
- [Release notes](https://github.com/shadcn-ui/ui/releases)
- [Changelog](https://github.com/shadcn-ui/ui/blob/main/packages/shadcn/CHANGELOG.md)
- [Commits](https://github.com/shadcn-ui/ui/commits/shadcn@4.16.0/packages/shadcn)

---
updated-dependencies:
- dependency-name: shadcn
  dependency-version: 4.16.0
  dependency-type: direct:production
...

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

package.json

@@ -27,7 +27,7 @@
     "react-dom": "19.2.8",
     "react-resizable-panels": "^4.12.2",
     "recharts": "3.10.1",
-    "shadcn": "^4.15.0",
+    "shadcn": "^4.16.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.6.0",
     "tw-animate-css": "^1.4.0"