Admin
Placeholder from P0-1. Screens are listed in build-plan.md §8.
Sign in (P0-4: proves the generated api-client types).
Products (P1-1: platform catalog CRUD + Excel import).
Fee tables and FX rates (P1-2: versioned fee/FX inputs to landed cost).
Tenants (P1-3: create/suspend, payment-method matrix, auto-provisioned site).
Selector portal (P1-4: catalog picker, pricing rules, materialised prices, price lock — separate role, AR/RTL).