商铺端核销，调用相机报无效签名修复

apps/h5-shop/src/pages/HomePage.tsx

@@ -12,6 +12,7 @@ import {
   sessionFromWechatLogin,
 } from '../lib/wechat-auth';
 import { isWechatEnv, weixinSdk } from '../lib/weixin';
+import { stripOAuthParamsFromLocation } from '@dukang/weixin-sdk';
 import WechatScanAuthModal from '../components/WechatScanAuthModal';
 
 const PENDING_SCAN_KEY = 'shop_pending_scan';
@@ -20,6 +21,14 @@ function formatMoney(n: number) {
   return n.toLocaleString('zh-CN', { minimumFractionDigits: 0, maximumFractionDigits: 2 });
 }
 
+function formatScanError(e: unknown): string {
+  const msg = e instanceof Error ? e.message : '扫码失败，请重试';
+  if (/invalid signature/i.test(msg)) {
+    return '微信 JSSDK 签名校验失败：请确认公众号已配置 JS 接口安全域名为 shop.runxian.top，并刷新页面后重试';
+  }
+  return msg;
+}
+
 export default function HomePage() {
   const navigate = useNavigate();
   const { applySession } = useStoreSession();
@@ -51,11 +60,12 @@ export default function HomePage() {
         }
         setAuthModalOpen(false);
         setAuthError('');
+        stripOAuthParamsFromLocation();
         setSearchParams({}, { replace: true });
         const shouldScan = sessionStorage.getItem(PENDING_SCAN_KEY) === '1';
         sessionStorage.removeItem(PENDING_SCAN_KEY);
         if (shouldScan) {
-          void runScan();
+          window.setTimeout(() => void runScan(), 0);
         }
       })
       .catch((e) => {
@@ -81,7 +91,7 @@ export default function HomePage() {
       }
       navigate(`/redeem?token=${encodeURIComponent(token)}`);
     } catch (e) {
-      setScanMsg(e instanceof Error ? e.message : '扫码失败，请重试');
+      setScanMsg(formatScanError(e));
     } finally {
       setScanning(false);
     }