支付域名识别更新：Vercel → polyweather.top

payment-host.ts 新增 polyweather.top。site-url.ts/wallet.ts/usePaymentFlow/AccountCenter 硬编码域名替换。PRODUCTION_SITE_URL 改为 https://polyweather.top。

frontend/lib/payment-host.ts

@@ -1,5 +1,6 @@
 const DEFAULT_ALLOWED_PAYMENT_HOSTS = [
   "polyweather-pro.vercel.app",
+  "polyweather.top",
   "localhost",
   "127.0.0.1",
 ];

frontend/lib/site-url.ts

@@ -1,4 +1,4 @@
-export const PRODUCTION_SITE_URL = "https://polyweather-pro.vercel.app";
+export const PRODUCTION_SITE_URL = "https://polyweather.top";
 
 export function getConfiguredSiteUrl() {
   const configured = process.env.NEXT_PUBLIC_SITE_URL?.trim();