feat(vip): Batch 3 dedicated user-center VIP tab

Register 我的会员 panel, zibll-style status/equity cards, sidebar deep-link,
and slim credits-tab entry so VIP is no longer nested only under assets.

inc/helpers/aksrt-user-center.php

@@ -169,6 +169,7 @@ if (!function_exists('aksrt_capture_user_center_view')) {
 			'comments'       => 'comments',
 			'favorites'      => 'favorites',
 			'credits'        => 'credits',
+			'vip'            => 'vip',
 			'settings'       => 'settings',
 			'header'         => 'header',
 			'sidebar'        => 'sidebar',
@@ -193,7 +194,7 @@ if (!function_exists('aksrt_capture_user_center_panel')) {
 	 * Capture a built-in or registered user-center panel body.
 	 */
 	function aksrt_capture_user_center_panel(string $tab_key, array $tab, array $context): string {
-		$built_in_tabs = ['profile', 'posts', 'comments', 'favorites', 'credits', 'settings'];
+		$built_in_tabs = ['profile', 'posts', 'comments', 'favorites', 'credits', 'vip', 'settings'];
 		if (in_array($tab_key, $built_in_tabs, true)) {
 			return aksrt_capture_user_center_view($tab_key, $context);
 		}