Migrate UI theme variables to react-zen tokens and update dependency package

package.json

@@ -65,7 +65,7 @@
     "@prisma/extension-read-replicas": "^0.5.0",
     "@svgr/cli": "^8.1.0",
     "@tanstack/react-query": "^5.101.4",
-    "@umami/react-zen": "^0.249.0",
+    "@umami/react-zen": "^0.251.0",
     "bcryptjs": "^3.0.2",
     "chalk": "^5.6.2",
     "chart.js": "^4.5.1",