fix: revert backend ref

Author: lorenzocorallo

package.json

@@ -16,7 +16,7 @@
     "@base-ui/react": "^1.3.0",
     "@better-auth/passkey": "^1.5.5",
     "@hookform/resolvers": "^3.9.1",
-    "@polinetwork/backend": "file:../backend/package/dist",
+    "@polinetwork/backend": "^0.15.5",
     "@radix-ui/react-dialog": "^1.1.15",
     "@t3-oss/env-nextjs": "^0.13.10",
     "@tanstack/react-query": "^5.90.19",