feat(nav): rewrite top header to zibll 1:1 DOM/CSS/JS contract

Replace hybrid site-nav/drawer shell with zibll navbar-top layouts 1/2/3,
body.mobile-navbar-show drawer, wired NavWalker + aksrt_menu_options meta,
nav_folding/chevron, VIP switches, and SPA/PHP schema parity. No dual-class
compat paths.

inc/helpers/aksrt-header-userbox.php

@@ -117,6 +117,10 @@ if (!function_exists('aksrt_header_payvip_bar')) :
 			return '';
 		}
 
+		$nav = class_exists('\AKSRT\Settings\Settings')
+			? \AKSRT\Settings\Settings::get_header_nav_settings()
+			: ['nav_user_pay_vip' => true];
+
 		$level = function_exists('aksrt_get_user_vip_level') ? (int) aksrt_get_user_vip_level($user_id) : 0;
 		if ($level > 0) {
 			$levels = is_array($vip['levels'] ?? null) ? $vip['levels'] : [];
@@ -139,6 +143,11 @@ if (!function_exists('aksrt_header_payvip_bar')) :
 			return $html;
 		}
 
+		// Open-VIP CTA only when user-box switch is on (zibll nav_user_pay_vip).
+		if (empty($nav['nav_user_pay_vip'])) {
+			return '';
+		}
+
 		return '<div class="mt10 em09 aksrt-header-payvip">'
 			. '<a class="pay-vip but radius4 payvip-icon btn-block navbar-cta" href="javascript:;" vip-level="1">'
 			. '<i class="fas fa-gem" aria-hidden="true"></i>'