Next.js-ERPNext Sync Fix

No errors appear on the frontend, yet the records never land in the backend, so the breakdown is clearly in the API hand-off from Next.js to ERPNext.

I need someone who truly understands both the Frappe REST API and modern Next.js (React 18, Node, TypeScript, Axios/fetch) to trace the request flow, pinpoint the failure, and deliver a clean, tested patch. I am happy with the existing codebase otherwise, so the job is strictly about restoring reliable, real-time syncing in that one direction.

Please plan to:

• audit the current integration layer and identify the exact call or webhook chain that drops the merchant payload
• implement the fix (whether that means adjusting authentication, request formatting, or ERPNext endpoint configuration) without breaking anything else
• add a quick automated test or logging hook so I can verify future merchant records travel from the UI to ERPNext every time

If you’ve debugged Frappe integrations before, this should be a focused task; I simply need it done right and quickly.