docs: fix Regular Store payment — wallet-only, no IPG/ZarinPal
- Regular Store: Balance deduction only (SubmitShopBuyOrderCommandHandler)
NO ZarinPal redirect, NO payment gateway
- Discount Store: DiscountBalance + ZarinPal IPG for remainder
Added gatewayAmount=0 edge case (discount covers 100%)
- VAT: Both stores use 9% (ShopVAT=0.1 is stale/unused constant)
- Added ZarinPal usage scope note (only: Discount Store, Wallet Top-up, Package Purchase)
- Fixed BUSINESS-02: sections 2, 5.2, 5.3, 7
- Fixed BUSINESS-03: store comparison chart
- Fixed OVERVIEW-01: user journey + both store flowcharts
- Fixed OVERVIEW-03: timeline entry
masoodafar-web
b861b66cda