Evergreen farms (pos)

- Conducted an end-to-end review of the FedEx shipping integration and identified gaps in multi-tenant caching, residential routing, customs handling, cancellation, and webhook security.
- Implemented multi-tenant FedEx OAuth token caching using client ID, account number, and base URL to prevent token conflicts across tenants.
- Added automatic FedEx service resolution between FEDEX_GROUND and GROUND_HOME_DELIVERY based on delivery address and added international customs support with weight conversion and commodity declarations.
- Implemented and verified FedEx shipment cancellation and strengthened webhook HMAC signature validation using the raw request body with Base64 and Hex support.
- Enhanced multi-package order tracking and the Dropper Dashboard with parcel-level statuses, tracking timelines, carrier filters, and live carrier tracking.
- Added 4×6 label preview/printing, parcel status simulation, and customer Email/SMS notification triggers to support end-to-end FedEx sandbox testing.

- Enhanced the Dropper Manifest to display complete customer shipping addresses, recipient names, and phone numbers in a multi-line format.
- Validated dynamic shipping rate calculations based on dimensional weight, actual weight, packaging type, and sender/recipient ZIP codes.
- Designed the Return and Replacement (RMA) workflow to support refunds, replacements, exchanges, and store credits.
- Updated backend return request and order schemas to manage replacement details, return shipping methods, and item disposition statuses.
- Implemented automatic replacement order creation with original shipping details, zero-dollar payment handling, and warehouse fulfillment integration.
- Implemented return inventory disposition logic to restock sellable items and record damaged or scrapped items without affecting available inventory.
- Updated the customer return request modal with Free Replacement and Cash Refund options and dynamic pricing summaries.
- Enhanced customer order details with return/replacement actions, linked replacement order information, return label downloads, and replacement status indicators.
- Fixed FedEx Sandbox tracking fallback issues and implemented multi-package order status synchronization while preserving existing tracking statuses and manual events.
- Integrated return and replacement requests into the customer tracking screen and continued preparing the admin workflow for replacement approvals, return label handling, and inbound inventory disposition.

- Implemented the merchant/admin return and replacement tracking portal with dynamic status timelines, replacement approval options, return waiver functionality, and inbound item inspection.
- Added return item disposition options to restock products into inventory or scrap/discard damaged items, along with return type filters, KPI cards, and parent-to-replacement order navigation.
- Enhanced backend return management APIs with resolution type filtering, aggregation metrics, and automatic disposition handling.
- Integrated replacement orders into the Warehouse Dropper and Packer dashboards with replacement badges, parent order references, and replacement-specific filters.
- Updated thermal 4×6 shipping labels with the “REPLACEMENT ORDER - NO CHARGE (WARRANTY)” banner for warranty replacement shipments.
- Automated carrier handoff processing to update linked RMA status, record replacement tracking numbers and carrier details, and send shipment notification emails to customers.
- Streamlined warehouse role responsibilities by separating order assignment, picking, packing, shipping label generation, and carrier handoff operations across the respective dashboards.
- Implemented automatic email notifications and persistent in-app reminders for Warehouse Managers when new customer orders arrive, including order details and direct navigation links.
- Restored real-time header notification bell updates using the merch-alerts API and Socket.IO, and enforced role-based notifications so new orders are visible only to Warehouse Managers and Admins while floor workers receive alerts for their assigned tasks.
- Successfully validated the frontend production build using npm run build with zero compilation errors and prepared the next development task for FedEx reverse logistics and return shipping label generation.

• Implemented FedEx reverse logistics integration to support return shipments from customers to the designated warehouse, including shipment creation and return tracking.

• Developed return shipping label generation functionality for approved RMAs, supporting FedEx 4×6 thermal labels with shipment details, tracking numbers, and return addresses.

• Integrated FedEx return rate calculation APIs to estimate return shipping costs based on package weight, dimensions, origin, and destination.

• Automated reverse shipment tracking updates to synchronize carrier statuses with RMA records and provide real-time visibility into returned shipments.

• Added customer email notifications for return label generation, pickup scheduling, in-transit updates, and successful delivery to the warehouse.

• Implemented error handling and sandbox testing for FedEx return shipment creation, label generation, tracking synchronization, and failed shipment requests.

- Fixed the return request validation error by making the `returnShippingMethod` field dynamic in the backend RMA model