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>

apps/business/src/pages/StoreSettingsPage.tsx

@@ -30,6 +30,23 @@ import styles from './StoreSettingsPage.module.css'
 const DEFAULT_STORE_SETTINGS: StoreSettings = {
   onlineSellEnabled: true,
   orderProcessSteps: DEFAULT_ORDER_PROCESS_STEPS,
+  ePayment: {
+    enabled: false,
+    defaultGateway: null,
+    gateways: {
+      mellat: {
+        enabled: false,
+        terminalId: '',
+        username: '',
+        password: '',
+        passwordSet: false,
+      },
+      sep: { enabled: false },
+      snappay: { enabled: false },
+      digipay: { enabled: false },
+      zarinpal: { enabled: false },
+    },
+  },
 }
 
 function normalizeSteps(steps: OrderProcessStep[]) {