refactor: drop order quick shortcuts, keep My Orders tile only

Per feedback the 待支付/售后 shortcut row is not wanted. Remove the nested
quick grid, delete the now-orphaned sidebar-orders renderer, and strip its
uc-order-grid CSS. 我的订单 remains a single tile in the 我的服务 grid.

inc/helpers/user-center-renderers/sidebar-nav.php

@@ -79,9 +79,6 @@ $render_grid = static function (array $items): void {
 <div class="uc-sidebar__section">
 	<div class="uc-sidebar__heading"><span><?php esc_html_e('我的服务', 'aksrt'); ?></span></div>
 	<?php $render_grid($services); ?>
-	<?php if ($orders_url !== '') : ?>
-		<?php require __DIR__ . '/sidebar-orders.php'; ?>
-	<?php endif; ?>
 </div>
 <?php endif; ?>
 

inc/helpers/user-center-renderers/sidebar-orders.php

@@ -1,50 +0,0 @@
-<?php
-/**
- * User center sidebar: task-oriented order shortcuts.
- *
- * Rendered inside the 我的服务 (My Services) section — see sidebar-nav.php.
- *
- * @package AKSRT
- */
-
-defined('ABSPATH') || exit;
-
-$orders_base_url = (string) ($orders_url ?? '');
-if ($orders_base_url === '') {
-	return;
-}
-
-$order_user_id = (int) ($user_id ?? 0);
-$order_stats = class_exists('\AKSRT\Payment\Order')
-	? \AKSRT\Payment\Order::get_instance()->get_stats($order_user_id)
-	: [];
-$order_items = [
-	[
-		'label' => __('待支付', 'aksrt'),
-		'icon'  => 'wallet',
-		'tab'   => 'pending',
-		'count' => (int) ($order_stats['pending'] ?? 0),
-	],
-	[
-		'label' => __('售后', 'aksrt'),
-		'icon'  => 'undo-alt',
-		'tab'   => 'after',
-		'count' => (int) ($order_stats['refunding'] ?? 0),
-	],
-];
-?>
-<div class="uc-order-grid uc-order-grid--quick">
-	<?php foreach ($order_items as $item) :
-		$item_url = add_query_arg('order_tab', $item['tab'], $orders_base_url);
-		?>
-		<a class="uc-order-grid__item" href="<?php echo esc_url($item_url); ?>">
-			<span class="uc-order-grid__icon">
-				<i class="fas fa-<?php echo esc_attr((string) $item['icon']); ?>" aria-hidden="true"></i>
-				<?php if ($item['count'] > 0) : ?>
-					<small><?php echo esc_html($item['count'] > 99 ? '99+' : (string) $item['count']); ?></small>
-				<?php endif; ?>
-			</span>
-			<span><?php echo esc_html((string) $item['label']); ?></span>
-		</a>
-	<?php endforeach; ?>
-</div>