feat(customers): add Digipay installment admin section

Wire routes, settings groups, page access, and customer UI for installment management.

src/utils/config.ts

@@ -80,6 +80,9 @@ export const customerSpecialPricingEnabledSetting = ref(false)
 /** reactive — زیرمنوی اعتبار طلایی در مشتریان */
 export const goldCreditEnabledSetting = ref(false)
 
+/** reactive — زیرمنوی خرید اقساطی دیجی‌پی */
+export const digipayInstallmentEnabledSetting = ref(false)
+
 /** reactive — منو و زنگوله اعلان داخل اپ */
 export const appNotificationEnabledSetting = ref(true)
 
@@ -185,6 +188,10 @@ export function setCustomerSpecialPricingEnabledFromSettings(value: boolean): vo
   customerSpecialPricingEnabledSetting.value = value
 }
 
+export function setDigipayInstallmentEnabledFromSettings(value: boolean): void {
+  digipayInstallmentEnabledSetting.value = value
+}
+
 export function setGoldCreditEnabledFromSettings(value: boolean): void {
   goldCreditEnabledSetting.value = value
 }
@@ -314,6 +321,13 @@ export function applyCustomerSpecialPricingFromRows(
   if (row) setCustomerSpecialPricingEnabledFromSettings(isSwitchOn(row.value))
 }
 
+export function applyDigipayInstallmentEnabledFromRows(
+  rows: Array<{ key?: string; value?: string | null }>
+) {
+  const row = rows.find((item) => item.key === 'enable_digipay_installment')
+  if (row) setDigipayInstallmentEnabledFromSettings(isSwitchOn(row.value))
+}
+
 export function applyGoldCreditEnabledFromRows(
   rows: Array<{ key?: string; value?: string | null }>
 ) {
@@ -340,6 +354,7 @@ export function applySuperAdminAccessFlagsFromItems(
   applyGroupSmsFromRows(rows)
   applyCustomerSpecialPricingFromRows(rows)
   applyGoldCreditEnabledFromRows(rows)
+  applyDigipayInstallmentEnabledFromRows(rows)
   applyConditionalOrderEnabledFromRows(rows)
   applyAutomationEnabledFromRows(rows)
   applyProductFundsEnabledFromRows(rows)
@@ -442,6 +457,7 @@ async function bootstrapSettingsFromApi(): Promise<void> {
     applyGroupSmsFromRows(list)
     applyCustomerSpecialPricingFromRows(list)
     applyGoldCreditEnabledFromRows(list)
+    applyDigipayInstallmentEnabledFromRows(list)
     applyConditionalOrderEnabledFromRows(list)
     applyAutomationEnabledFromRows(list)
     applyProductFundsEnabledFromRows(list)