feat(user-center): promote invite into standalone 推广中心 tab

Register a dedicated `promotion` dashboard panel gated by the existing
invite switches (credits + invite reward + invite registration), and move
the invite card out of the revenue tab so 收益中心 is pure earnings/withdrawal.

- src/User/Center.php: register promotion panel; revenue no longer depends
  on invite being on
- inc/helpers/user-center-renderers/profile-promotion.php: new panel body
  hosting the existing [data-aksrt-invite] card
- profile-revenue.php: drop the invite section; aksrt-user-center.php: drop
  unused show_invite_section context, add promotion to built-in tabs + view map
- repoint invite/promotion deep-link aliases from revenue to promotion across
  tab-url builder, tab resolver, runtime tabAliases, urls.php, and the
  revenue-JS enqueue gate
- sidebar-nav.php: add 推广中心 service entry; shell.css: entry icon color;
  sidebar-creator.php: reword revenue card
- UserRuntime.php: allow promotion in configurable tabs

inc/helpers/user-center-renderers/profile-promotion.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * User center promotion panel (invite / 推广中心).
+ *
+ * Standalone dashboard tab that hosts the invite card. Reuses the existing
+ * invite REST contract and credits.js `initInvite()` binding via the
+ * `[data-aksrt-invite]` card in profile-invite.php.
+ *
+ * @package AKSRT
+ */
+
+defined('ABSPATH') || exit;
+
+$context = is_array($args['context'] ?? null) ? $args['context'] : [];
+$user_id = (int) ($context['user_id'] ?? get_current_user_id());
+if ($user_id <= 0) {
+	echo '<div class="uc-panel-empty muted-2-color">' . esc_html__('请先登录', 'aksrt') . '</div>';
+	return;
+}
+
+$currency_name = (string) ($context['currency_name'] ?? __('积分', 'aksrt'));
+?>
+<div class="uc-promotion-page" data-aksrt-promotion-page>
+	<?php require __DIR__ . '/profile-invite.php'; ?>
+</div>

inc/helpers/user-center-renderers/profile-revenue.php

@@ -15,7 +15,6 @@ if ($user_id <= 0) {
 }
 
 $show_revenue_section = !empty($context['show_revenue_section']);
-$show_invite_section = !empty($context['show_invite_section']);
 $revenue_view = function_exists('aksrt_get_revenue_page_view')
 	? aksrt_get_revenue_page_view($user_id)
 	: ['balance' => 0, 'total_earned' => 0, 'total_withdrawn' => 0, 'records' => []];
@@ -59,6 +58,4 @@ $revenue_url = static function (int $target_page): string {
 		<section class="aksrt-revenue-page__section"><h3><?php esc_html_e('收益明细', 'aksrt'); ?></h3><?php if ($paged_records) : ?><div class="aksrt-revenue-page__list"><?php foreach ($paged_records as $record) : ?><div class="aksrt-revenue-page__item"><div><strong><?php echo esc_html((string) ($record['title'] ?? '')); ?></strong><time><?php echo esc_html((string) ($record['created_at'] ?? '')); ?></time></div><span class="<?php echo ($record['type'] ?? '') === 'withdrawal' ? 'is-out' : 'is-in'; ?>"><?php echo ($record['type'] ?? '') === 'withdrawal' ? '-' : '+'; ?>¥<?php echo esc_html(number_format_i18n((float) ($record['amount'] ?? 0), 2)); ?></span></div><?php endforeach; ?></div><?php if ($total_pages > 1) : ?><nav class="aksrt-revenue-page__pagination" aria-label="<?php esc_attr_e('收益分页', 'aksrt'); ?>"><?php for ($index = 1; $index <= $total_pages; $index++) : ?><a class="aksrt-revenue-page__page-chip<?php echo $index === $page ? ' is-active' : ''; ?>" href="<?php echo esc_url($revenue_url($index)); ?>"><?php echo esc_html((string) $index); ?></a><?php endfor; ?></nav><?php endif; ?><?php else : ?><p class="aksrt-revenue-page__empty"><?php esc_html_e('暂无收益明细', 'aksrt'); ?></p><?php endif; ?></section>
 		</section>
 	<?php endif; ?>
-
-	<?php if ($show_invite_section) : require __DIR__ . '/profile-invite.php'; endif; ?>
 </div>

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

@@ -28,7 +28,7 @@ if ($creation_url === '' && $revenue_url === '') {
 	<?php if ($revenue_url !== '') : ?>
 		<a class="uc-center-card uc-center-card--revenue" href="<?php echo esc_url($revenue_url); ?>">
 			<span class="uc-center-card__icon"><i class="fas fa-chart-line" aria-hidden="true"></i></span>
-			<span><strong><?php esc_html_e('收益中心', 'aksrt'); ?></strong><small><?php esc_html_e('邀请、返佣与收益', 'aksrt'); ?></small></span>
+			<span><strong><?php esc_html_e('收益中心', 'aksrt'); ?></strong><small><?php esc_html_e('返佣与收益提现', 'aksrt'); ?></small></span>
 			<i class="fas fa-angle-right" aria-hidden="true"></i>
 		</a>
 	<?php endif; ?>

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

@@ -11,6 +11,7 @@ $level_url = isset($dashboard_tabs['level'])
 	? aksrt_get_user_center_tab_url('level')
 	: '';
 $auth_url = isset($dashboard_tabs['auth']) ? aksrt_get_user_center_tab_url('auth') : '';
+$promotion_url = isset($dashboard_tabs['promotion']) ? aksrt_get_user_center_tab_url('promotion') : '';
 $orders_available = isset($dashboard_tabs['orders']);
 $orders_url = $orders_available ? (string) ($orders_url ?? '') : '';
 
@@ -21,6 +22,13 @@ $services = array_values(array_filter([
 		'tone'  => 'level',
 		'url'   => $level_url,
 	],
+	[
+		'label' => __('推广中心', 'aksrt'),
+		'icon'  => 'bullhorn',
+		'tone'  => 'promotion',
+		'url'   => $promotion_url,
+		'tab'   => 'promotion',
+	],
 	[
 		'label' => __('官方认证', 'aksrt'),
 		'icon'  => 'id-badge',