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

src/User/Center.php

@@ -91,6 +91,12 @@ class Center {
                 'priority' => 50,
                 'type'     => 'panel',
             ],
+            'promotion' => [
+                'label'    => __('推广中心', 'aksrt'),
+                'icon'     => 'bullhorn',
+                'priority' => 52,
+                'type'     => 'panel',
+            ],
             'revenue' => [
                 'label'    => __('收益中心', 'aksrt'),
                 'icon'     => 'chart-line',
@@ -131,12 +137,13 @@ class Center {
             && class_exists('\AKSRT\Settings\Settings')
             && \AKSRT\Settings\Settings::invite_enabled()
             && \AKSRT\Settings\Settings::invite_registration_enabled();
-        $revenue_on = class_exists('\AKSRT\Settings\Settings')
+        // Promotion (invite) center is its own tab; revenue stays pure earnings/withdrawal.
+        $promotion_on = $invite_on;
+        $revenue_tab_on = class_exists('\AKSRT\Settings\Settings')
             && (
                 !empty(\AKSRT\Settings\Settings::get_payment_revenue_settings()['enabled'])
                 || !empty(\AKSRT\Settings\Settings::get_payment_affiliate_settings()['enabled'])
             );
-        $revenue_tab_on = $revenue_on || $invite_on;
         $vip_on = class_exists('\AKSRT\Settings\Settings')
             && !empty(\AKSRT\Settings\Settings::get_payment_vip_settings()['enabled']);
 
@@ -183,7 +190,7 @@ class Center {
         if (($credits_on || $balance_on) && !in_array('credits', $order, true)) {
             $order[] = 'credits';
         }
-        if ($revenue_tab_on && !in_array('revenue', $order, true)) {
+        if ($promotion_on && !in_array('promotion', $order, true)) {
             $insert_at = count($order);
             foreach (['credits', 'favorites', 'posts'] as $anchor) {
                 $idx = array_search($anchor, $order, true);
@@ -192,6 +199,17 @@ class Center {
                     break;
                 }
             }
+            array_splice($order, $insert_at, 0, ['promotion']);
+        }
+        if ($revenue_tab_on && !in_array('revenue', $order, true)) {
+            $insert_at = count($order);
+            foreach (['promotion', 'credits', 'favorites', 'posts'] as $anchor) {
+                $idx = array_search($anchor, $order, true);
+                if ($idx !== false) {
+                    $insert_at = (int) $idx + 1;
+                    break;
+                }
+            }
             array_splice($order, $insert_at, 0, ['revenue']);
         }
         $auth_on = class_exists('\AKSRT\User\AuthApply')
@@ -216,6 +234,9 @@ class Center {
             if ($key === 'revenue' && !$revenue_tab_on) {
                 continue;
             }
+            if ($key === 'promotion' && !$promotion_on) {
+                continue;
+            }
             if ($key === 'vip' && !$vip_on) {
                 continue;
             }