fix(payment): show selected currency in recharge rate

frontend/src/i18n/locales/en/misc.ts

@@ -390,7 +390,7 @@ export default {
     amountTooLow: 'Minimum amount is {min}',
     amountTooHigh: 'Maximum amount is {max}',
     amountNoMethod: 'No payment method available for this amount',
-    rechargeRatePreview: 'Current rate: 1 CNY = {usd} USD',
+    rechargeRatePreview: 'Current rate: 1 {currency} = {usd} USD',
     refundReason: 'Refund Reason',
     refundReasonPlaceholder: 'Please describe your refund reason',
     stripeLoadFailed: 'Failed to load payment component. Please refresh and try again.',

frontend/src/i18n/locales/zh/misc.ts

@@ -414,7 +414,7 @@ export default {
     amountTooLow: '最低金额为 {min}',
     amountTooHigh: '最高金额为 {max}',
     amountNoMethod: '该金额没有可用的支付方式',
-    rechargeRatePreview: '当前倍率：1 CNY = {usd} USD',
+    rechargeRatePreview: '当前倍率：1 {currency} = {usd} USD',
     refundReason: '退款原因',
     refundReasonPlaceholder: '请描述您的退款原因',
     stripeLoadFailed: '支付组件加载失败，请刷新页面重试',

frontend/src/views/user/PaymentView.vue

@@ -80,7 +80,7 @@
                   <span class="text-gray-900 dark:text-white">${{ creditedAmount.toFixed(2) }}</span>
                 </div>
                 <p v-if="balanceRechargeMultiplier !== 1" class="border-t border-gray-200 pt-2 text-xs text-gray-500 dark:border-dark-600 dark:text-gray-400">
-                  {{ t('payment.rechargeRatePreview', { usd: balanceRechargeMultiplier.toFixed(2) }) }}
+                  {{ t('payment.rechargeRatePreview', { currency: selectedCurrency, usd: balanceRechargeMultiplier.toFixed(2) }) }}
                 </p>
               </div>
             </div>

frontend/src/views/user/__tests__/PaymentView.spec.ts

@@ -3,7 +3,10 @@ import { flushPromises, shallowMount } from '@vue/test-utils'
 import PaymentView from '../PaymentView.vue'
 import { PAYMENT_RECOVERY_STORAGE_KEY } from '@/components/payment/paymentFlow'
 import { formatPaymentAmount } from '@/components/payment/currency'
+import AmountInput from '@/components/payment/AmountInput.vue'
 import SubscriptionPlanCard from '@/components/payment/SubscriptionPlanCard.vue'
+import en from '@/i18n/locales/en'
+import zh from '@/i18n/locales/zh'
 import type { CheckoutInfoResponse, MethodLimit, SubscriptionPlan } from '@/types/payment'
 
 const routeState = vi.hoisted(() => ({
@@ -22,6 +25,7 @@ const showInfo = vi.hoisted(() => vi.fn())
 const showWarning = vi.hoisted(() => vi.fn())
 const getCheckoutInfo = vi.hoisted(() => vi.fn())
 const bridgeInvoke = vi.hoisted(() => vi.fn())
+const translate = vi.hoisted(() => vi.fn((key: string) => key))
 
 vi.mock('vue-router', async () => {
   const actual = await vi.importActual<typeof import('vue-router')>('vue-router')
@@ -41,7 +45,7 @@ vi.mock('vue-i18n', async () => {
   return {
     ...actual,
     useI18n: () => ({
-      t: (key: string) => key,
+      t: translate,
     }),
   }
 })
@@ -292,6 +296,43 @@ describe('PaymentView subscription plan grid', () => {
   })
 })
 
+describe('PaymentView recharge rate preview', () => {
+  it('uses the selected payment method currency in both locale templates', async () => {
+    translate.mockClear()
+    routeState.path = '/purchase'
+    routeState.query = {}
+    getCheckoutInfo.mockReset().mockResolvedValue(checkoutInfoFixture({
+      balance_recharge_multiplier: 0.5,
+      methods: {
+        stripe: {
+          ...checkoutInfoFixture().data.methods.wxpay,
+          currency: 'USD',
+        },
+      },
+    }))
+
+    const wrapper = shallowMount(PaymentView, {
+      global: {
+        stubs: {
+          AppLayout: { template: '<div><slot /></div>' },
+          Teleport: true,
+          Transition: false,
+        },
+      },
+    })
+    await flushPromises()
+    wrapper.getComponent(AmountInput).vm.$emit('update:modelValue', 10)
+    await flushPromises()
+
+    expect(translate).toHaveBeenCalledWith('payment.rechargeRatePreview', {
+      currency: 'USD',
+      usd: '0.50',
+    })
+    expect(en.payment.rechargeRatePreview).toBe('Current rate: 1 {currency} = {usd} USD')
+    expect(zh.payment.rechargeRatePreview).toBe('当前倍率：1 {currency} = {usd} USD')
+  })
+})
+
 describe('PaymentView subscription confirmation amounts', () => {
   it('shows converted CNY pay amount using the subscription rate, not the balance multiplier', async () => {
     const wrapper = await mountSubscriptionConfirm({