feat(shop): 交易中心壳层 1:1 统一购物车/订单/收益

抽出 commerce header 与二级导航，购物车/订单/收益共用主站交易中心壳层；收益 stats 轻量化，降低独立电商后台观感。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

templates/pages/page-revenue.php

@@ -54,12 +54,20 @@ $paged_records = array_slice($records, ($paged - 1) * $per_page, $per_page);
 <div class="container aksrt-revenue-page" data-aksrt-revenue-page
 	 data-min-amount="<?php echo esc_attr((string) $min_amount); ?>"
 	 data-fee-rate="<?php echo esc_attr((string) $fee_rate); ?>">
-	<div class="aksrt-revenue-page__header">
-		<h1><?php esc_html_e('创作收益', 'aksrt'); ?></h1>
-		<p class="aksrt-revenue-page__subtitle"><?php esc_html_e('查看分成明细并发起提现。', 'aksrt'); ?></p>
-	</div>
+	<?php
+	if (function_exists('aksrt_render_commerce_page_header')) {
+		aksrt_render_commerce_page_header([
+			'title'    => __('创作收益', 'aksrt'),
+			'subtitle' => __('查看分成明细并发起提现。', 'aksrt'),
+			'active'   => 'revenue',
+		]);
+	} else {
+		echo '<div class="aksrt-revenue-page__header"><h1>' . esc_html__('创作收益', 'aksrt') . '</h1>';
+		echo '<p class="aksrt-revenue-page__subtitle">' . esc_html__('查看分成明细并发起提现。', 'aksrt') . '</p></div>';
+	}
+	?>
 
-	<div class="aksrt-revenue-page__stats">
+	<div class="aksrt-revenue-page__stats" aria-label="<?php esc_attr_e('收益概览', 'aksrt'); ?>">
 		<div class="aksrt-revenue-page__stat-card">
 			<div class="aksrt-revenue-page__stat-icon"><i class="fas fa-wallet"></i></div>
 			<div class="aksrt-revenue-page__stat-info">