fix(h5-shop): harden iOS WeChat scan after login with hard nav and recover UI

Root cause is JSSDK entry-URL mismatch after SPA post-OAuth, not camera permission. Hard-navigate on iOS, keep OAuth query in sign URL, skip redundant bind OAuth, and prompt refresh/re-auth on failure.

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/weixin-sdk/src/index.ts

@@ -5,10 +5,13 @@ export {
   ensureJssdkReady,
   isJssdkReady,
   normalizeJssdkPageUrl,
+  jssdkUrlWithoutHash,
   getJssdkSignUrl,
   captureIosJssdkEntryUrl,
   resetJssdkConfig,
   stripOAuthParamsFromLocation,
+  hardNavigateInWechat,
+  shouldHardNavigateForJssdk,
 } from './jssdk';
 export { formatScanFailMessage, isScanPermissionWarmupError } from './scan';
 export {