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/services/settingsService.ts

@@ -20,9 +20,60 @@ export interface OrderProcessStep {
   color: string
 }
 
+export type PaymentGatewayId =
+  | 'mellat'
+  | 'sep'
+  | 'snappay'
+  | 'digipay'
+  | 'zarinpal'
+
+export interface MellatGatewaySettings {
+  enabled: boolean
+  terminalId: string
+  username: string
+  /** Always empty in API responses; use passwordSet. */
+  password: string
+  passwordSet?: boolean
+}
+
+export interface StubGatewaySettings {
+  enabled: boolean
+}
+
+export interface EPaymentSettings {
+  enabled: boolean
+  defaultGateway: PaymentGatewayId | null
+  gateways: {
+    mellat: MellatGatewaySettings
+    sep: StubGatewaySettings
+    snappay: StubGatewaySettings
+    digipay: StubGatewaySettings
+    zarinpal: StubGatewaySettings
+  }
+}
+
 export interface StoreSettings {
   onlineSellEnabled: boolean
   orderProcessSteps: OrderProcessStep[]
+  ePayment: EPaymentSettings
+}
+
+export const DEFAULT_EPAYMENT_SETTINGS: EPaymentSettings = {
+  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 },
+  },
 }
 
 export interface ModulesSettings {