feat: 支付宝直连 H5 端使用 wap.pay 唤起支付宝 APP

前端传递 is_mobile 参数，AlipayProvider 根据设备类型选择：
- PC: alipay.trade.page.pay (FAST_INSTANT_TRADE_PAY)
- H5: alipay.trade.wap.pay (QUICK_WAP_WAY)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/order/service.ts

@@ -19,6 +19,7 @@ export interface CreateOrderInput {
   clientIp: string;
   srcHost?: string;
   srcUrl?: string;
+  isMobile?: boolean;
 }
 
 export interface CreateOrderResult {
@@ -134,6 +135,7 @@ export async function createOrder(input: CreateOrderInput): Promise<CreateOrderR
       paymentType: input.paymentType,
       subject: `${env.PRODUCT_NAME} ${payAmount.toFixed(2)} CNY`,
       clientIp: input.clientIp,
+      isMobile: input.isMobile,
     });
 
     await prisma.order.update({