Refactor createRecordMutation in FinancesPage.tsx to handle fetch responses properly. Replit-Commit-Author: Agent Replit-Commit-Session-Id: ff0be73b-afdd-4747-978b-bb8301fb0a82 Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/1999d076-38ec-4633-8667-1740c231dafc.jpg