fix(h5): hide in-page nav titles that duplicate WeChat chrome

Keep back buttons and header layout. mini-user only hides titles on H5; partner/shop hide .app-page-title and legal titles; shared PageHeader defaults showTitle=false.

apps/mini-user/src/pages/benefit/index.tsx

@@ -63,8 +63,10 @@ export default function BenefitPage() {
 
   return (
     <PageShell variant="tab" className="benefit-page">
-      <View className="benefit-header" style={navBarStyle(metrics)}>
-        <Text className="benefit-header-title">好客权益</Text>
+      <View className="benefit-header" style={navBarStyle(metrics)} aria-label="好客权益">
+        {process.env.TARO_ENV !== 'h5' ? (
+          <Text className="benefit-header-title">好客权益</Text>
+        ) : null}
         <View
           className="benefit-header__content"
           style={tabNavContentStyle(metrics)}