Marketplace Buyer/Seller Flow

PROJECT CONTEXT:
I am building a two-sided marketplace where sellers post listings and buyers browse and purchase/request them.

GOAL:
Implement working listings, browse/search, and a buyer-to-seller order/request flow with status tracking.

REQUIREMENTS:
- Sellers can create, edit, and unpublish listings
- Buyers can browse, search, and filter listings
- A listing detail page with a working order/request action
- Order records with statuses both sides can see
- Role-appropriate dashboards for buyers and sellers

CONSTRAINTS:
- Orders must be real records, not toasts
- Sellers must not be able to order their own listing
- Every list view needs loading and empty states

DEFINITION OF DONE:
- A seller can post a listing and see it live
- A buyer can find it via search and open its detail page
- Placing an order creates a record both sides can see
- Order status changes propagate to both dashboards

COMMON FAILURES TO AVOID:
- Listings stored in local state and lost on refresh
- Search that filters a hardcoded array
- An order button that only shows a success toast
- Buyers and sellers seeing the same generic dashboard