feat: add Airwallex payments and multi-currency support

frontend/src/i18n/locales/en.ts

@@ -5514,6 +5514,7 @@ export default {
         providerAlipay: 'Alipay (Direct)',
         providerWxpay: 'WeChat Pay (Direct)',
         providerStripe: 'Stripe',
+        providerAirwallex: 'Airwallex',
         typeDisabled: 'type disabled',
         enableTypesFirst: 'Enable at least one payment type above first',
         easypayRedirect: 'Redirect',
@@ -5540,12 +5541,24 @@ export default {
         wxpayConfigHint: 'WeChat Pay usually only needs App ID. Fill MP App ID, H5 App Name, and H5 App URL only when your Official Account or H5 flow specifically requires them.',
         wxpayAdvancedOptions: 'WeChat Pay Advanced Options',
         field_secretKey: 'Secret Key',
+        field_clientId: 'Client ID',
+        field_apiKey: 'API Key',
         field_publishableKey: 'Publishable Key',
         field_webhookSecret: 'Webhook Secret',
+        field_countryCode: 'Country/region code',
+        field_currency: 'Payment currency',
+        field_accountId: 'Airwallex Account ID',
+        field_airwallexApiBaseHint: 'Must match the API key environment: use https://api-demo.airwallex.com/api/v1 for sandbox/demo keys, and https://api.airwallex.com/api/v1 for production keys. Mixed environments return credentials_invalid / Access Denied.',
+        field_paymentCurrencyHint: 'Default is CNY. Stripe and Airwallex can choose HKD, USD, or another listed currency supported by the account; WeChat Pay, Alipay, and EasyPay remain CNY.',
+        field_accountIdHint: 'Leave this empty unless you use multiple accounts, an organization-level key, or connected-account payments. A single-account scoped API key uses the selected account by default.',
         field_cid: 'Channel ID',
         field_cidAlipay: 'Alipay Channel ID',
         field_cidWxpay: 'WeChat Channel ID',
         stripeWebhookHint: 'Configure the following URL as a Webhook endpoint in Stripe Dashboard:',
+        stripeWebhookApiVersionHint: 'Set this Webhook endpoint API version to match the integrated Stripe SDK. Recommended: {version}. A mismatch can cause webhook parsing errors.',
+        airwallexWebhookHint: 'Configure the following URL as a Webhook endpoint in Airwallex. Select at least Payment Intent -> Succeeded (payment_intent.succeeded), preferably also Payment Intent -> Cancelled (payment_intent.cancelled). Use the account default or latest stable API version.',
+        airwallexGuideSummary: 'When creating an Airwallex scoped API key, select Read and Write for Payment Acceptance under account-level permissions.',
+        airwallexGuideNote: 'Do not grant unrelated permissions such as Spend, Payouts, Transfers, Funds Splits, or POS Terminals unless you explicitly need them. For webhooks, select at least payment_intent.succeeded, preferably also payment_intent.cancelled, and use the account default or latest stable API version.',
         limitsTitle: 'Limits',
         limitSingleMin: 'Min per order',
         limitSingleMax: 'Max per order',
@@ -6402,6 +6415,7 @@ export default {
       alipay: 'Alipay',
       wxpay: 'WeChat Pay',
       stripe: 'Stripe',
+      airwallex: 'Airwallex',
       card: 'Card',
       link: 'Link',
       alipay_direct: 'Alipay (Direct)',
@@ -6487,6 +6501,8 @@ export default {
     stripeLoadFailed: 'Failed to load payment component. Please refresh and try again.',
     stripeMissingParams: 'Missing order ID or client secret',
     stripeNotConfigured: 'Stripe is not configured',
+    airwallexLoadFailed: 'Failed to load Airwallex payment component. Please refresh and try again.',
+    airwallexMissingParams: 'Missing Airwallex payment parameters',
     errors: {
       tooManyPending: 'Too many pending orders (max {max}). Please complete or cancel existing orders first.',
       cancelRateLimited: 'Too many cancellations. Please try again later.',
@@ -6532,6 +6548,7 @@ export default {
       REFUND_AMOUNT_EXCEEDED: 'Refund amount exceeds the recharge amount.',
       REFUND_FAILED: 'Refund failed.',
     },
+    airwallexPay: 'Airwallex Payment',
     stripePay: 'Pay Now',
     stripeSuccessProcessing: 'Payment successful, processing your order...',
     stripePopup: {

frontend/src/i18n/locales/zh.ts

@@ -5675,6 +5675,7 @@ export default {
         providerAlipay: '支付宝官方',
         providerWxpay: '微信官方',
         providerStripe: 'Stripe',
+        providerAirwallex: 'Airwallex',
         typeDisabled: '类型已禁用',
         enableTypesFirst: '请先在上方启用至少一种服务商',
         easypayRedirect: '跳转',
@@ -5701,12 +5702,24 @@ export default {
         wxpayConfigHint: '微信支付通常只需要填写 App ID。公众号 App ID、H5 应用名称、H5 应用地址仅在公众号支付或 H5 场景有特殊要求时再填写。',
         wxpayAdvancedOptions: '微信支付高级可选项',
         field_secretKey: '密钥',
+        field_clientId: 'Client ID',
+        field_apiKey: 'API Key',
         field_publishableKey: '公开密钥',
         field_webhookSecret: 'Webhook 密钥',
+        field_countryCode: '国家/地区代码',
+        field_currency: '支付币种',
+        field_accountId: 'Airwallex 账户 ID',
+        field_airwallexApiBaseHint: '必须和 API Key 所属环境一致：沙箱/测试密钥使用 https://api-demo.airwallex.com/api/v1，生产密钥使用 https://api.airwallex.com/api/v1。环境混用会返回 credentials_invalid / Access Denied。',
+        field_paymentCurrencyHint: '默认 CNY。Stripe 和 Airwallex 可按账户支持从下拉项选择 HKD、USD 等币种；微信、支付宝、易支付仍按 CNY。',
+        field_accountIdHint: '不涉及多账户、组织级密钥或连接账户收款时可以不填；单账户 Scoped API Key 会默认使用所选账户。',
         field_cid: '支付渠道 ID',
         field_cidAlipay: '支付宝渠道 ID',
         field_cidWxpay: '微信渠道 ID',
         stripeWebhookHint: '请在 Stripe Dashboard 中将以下地址配置为 Webhook 端点：',
+        stripeWebhookApiVersionHint: 'Webhook 端点的 API 版本请与当前集成的 Stripe SDK 对齐，建议选择 {version}；版本不一致可能导致回调事件解析失败。',
+        airwallexWebhookHint: '请在 Airwallex 后台将以下地址配置为 Webhook 端点；事件至少选择 Payment Intent -> Succeeded（payment_intent.succeeded），建议同时选择 Payment Intent -> Cancelled（payment_intent.cancelled）；API version 选择账户默认或最新稳定版本。',
+        airwallexGuideSummary: '创建 Airwallex Scoped API 密钥时，建议只在账户级权限中为 Payment Acceptance 勾选读取和写入。',
+        airwallexGuideNote: '不需要勾选 Spend、Payouts、Transfers、Funds Splits、POS 终端等与在线收款无关的权限。Webhook 事件至少选择 payment_intent.succeeded，建议同时选择 payment_intent.cancelled；API version 选择账户默认或最新稳定版本。',
         limitsTitle: '限额配置',
         limitSingleMin: '单笔最低',
         limitSingleMax: '单笔最高',
@@ -6587,6 +6600,7 @@ export default {
       alipay: '支付宝',
       wxpay: '微信支付',
       stripe: 'Stripe',
+      airwallex: 'Airwallex',
       card: '银行卡',
       link: 'Link',
       alipay_direct: '支付宝（直连）',
@@ -6672,6 +6686,8 @@ export default {
     stripeLoadFailed: '支付组件加载失败，请刷新页面重试',
     stripeMissingParams: '缺少订单ID或支付密钥',
     stripeNotConfigured: 'Stripe 未配置',
+    airwallexLoadFailed: 'Airwallex 支付组件加载失败，请刷新页面重试',
+    airwallexMissingParams: '缺少 Airwallex 支付参数',
     errors: {
       tooManyPending: '待支付订单过多（最多 {max} 个），请先完成或取消现有订单',
       cancelRateLimited: '取消订单过于频繁，请稍后再试',
@@ -6717,6 +6733,7 @@ export default {
       REFUND_AMOUNT_EXCEEDED: '退款金额超过充值金额',
       REFUND_FAILED: '退款失败',
     },
+    airwallexPay: 'Airwallex 支付',
     stripePay: '立即支付',
     stripeSuccessProcessing: '支付成功，正在处理订单...',
     stripePopup: {