refactor(assets): vendor 资产迁入标准目录并全仓去除 zibll 标识

- assets/vendor 全量迁移: fontawesome5→assets/fontawesome5, css→assets/css,
  js→assets/js/runtime(避开 14 个同名自有文件), img 合并去重→assets/img,
  fonts→assets/fonts; 删除 assets/vendor
- libs 五个与 widgets/third-party 字节相同的库不重复入库, loader paths 改指向
- 运行时切换: _win.uri=assets 根, loader baseUrl=/js/runtime, enlighter 注入
  路径同步; PHP 7 个引用文件切换并改名 $zibll_*→$runtime_*
- 去品牌: Qinver 头注释/品牌 console.log/演示链接清除, 默认文案中性化
- 功能标识符改名: zib__→aksrt__, zib_ajax→aksrt_ajax, window.zib→
  window.aksrtLegacy, zibllblock/*→aksrtblock/*, .zib-widget→.aksrt-panel,
  .zib-slider→.aksrt-slider, zib_menu_options meta 键等
- 自有 CSS 改名: legacy-utilities/compat-vars/footer shell
- admin SPA 重建; 契约测试同步(路径/断言/文件更名)
- 例外保留: tests/visual 对照环境与 fixtures 前缀(外部 Zibll 产品引用)

验证: php -l 133 个改动文件通过; runtime 86 个 JS node --check 通过;
契约测试 68/70(2 个失败经 stash 对照确认为存量问题)

inc/helpers/user-center-renderers/vip-tab.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * User center VIP tab (zibll 我的会员 1:1 structure).
+ * User center VIP tab (legacy 我的会员 1:1 structure).
  *
  * Expects extracted $context vars via profile-vip.php / capture path.
  *
@@ -14,7 +14,7 @@ if (empty($vip_settings['enabled']) && class_exists('\AKSRT\Settings\Settings'))
 	$vip_settings = \AKSRT\Settings\Settings::get_payment_vip_settings();
 }
 if (empty($vip_settings['enabled'])) {
-	echo '<div class="zib-widget padding-20 muted-2-color">' . esc_html__('会员功能未启用。', 'aksrt') . '</div>';
+	echo '<div class="aksrt-panel padding-20 muted-2-color">' . esc_html__('会员功能未启用。', 'aksrt') . '</div>';
 	return;
 }
 
@@ -147,7 +147,7 @@ foreach ([1, 2] as $lv) {
 		$cta = sprintf(__('续费%s', 'aksrt'), $lv_name);
 	}
 
-	$cards .= '<div class="zib-widget text-center pay-vip-info flex1 level-' . $lv . ' uc-vip-level-card">';
+	$cards .= '<div class="aksrt-panel text-center pay-vip-info flex1 level-' . $lv . ' uc-vip-level-card">';
 	$cards .= '<div class="relative uc-vip-level-card__inner">';
 	$cards .= '<div class="v-iconbox mb10 flex jc ac">';
 	$cards .= '<div class="v-icon flex jc ac">' . $lv_icon . '</div>';