Add e-payment UI, checkout payment result, and legacy migrate domain lookup.

Wire Mellat settings in business dashboard, customer bank return page with payment details, and super-admin migrate modal domain confirmation.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/PROJECT_CONTEXT.md

@@ -3,7 +3,7 @@
 > **For AI agents:** Read this file at the start of a new chat before making changes.  
 > Update this document when a major feature is completed or architecture changes.
 
-Last updated: August 11, 2026
+Last updated: August 13, 2026
 
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@@ -158,8 +158,10 @@ Add to `/etc/hosts` (one line per tenant):
 | `/checkout/login` | Checkout sign-in step |
 | `/checkout/cart` | Cart review |
 | `/checkout/delivery` | Address or pickup |
-| `/checkout/payment` | Discount code + payment |
-| `/checkout/success` | Order confirmation |
+| `/checkout/payment` | Discount code + payment (online → bank redirect) |
+| `/checkout/result` | Bank return callback (`status`, `orderId`, payment meta) |
+| `/checkout/success` | Order confirmation (+ payment data when from gateway) |
+| `/checkout/failed` | Checkout / payment failure (+ payment data when present) |
 | `/` | Home |
 | `/profile` | Profile |
 | `/addresses` | Addresses |
@@ -220,7 +222,7 @@ Add to `/etc/hosts` (one line per tenant):
 | `/website/subscriptions` | Subscriptions | Placeholder |
 | `/website/faq` | FAQ | Placeholder |
 | `/website/badges` | Badges | Placeholder |
-| `/website/e-payment` | E-payment | Placeholder |
+| `/website/e-payment` | E-payment | Mellat credentials + multi-gateway stubs (SEP, Snapp Pay, DigiPay, Zarinpal) |
 
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