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)

src/Admin/Native/PayOrders.php

@@ -85,7 +85,7 @@ class PayOrders {
             ? \AKSRT\Core\DomainModel::order_status_labels()
             : [];
 
-        // Type tabs (zibll order subsubsub parity).
+        // Type tabs (legacy order subsubsub parity).
         $type_tabs = [
             ''          => __('全部类型', 'aksrt'),
             'resource'  => __('内容付费', 'aksrt'),
@@ -177,7 +177,7 @@ class PayOrders {
         }
         echo '</form>';
 
-        // Hygiene actions (zibll clear_order / delete).
+        // Hygiene actions (legacy clear_order / delete).
         echo '<p style="margin:8px 0 12px;">';
         echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="display:inline;" onsubmit="return confirm(\'' . esc_js(__('将删除 14 天前所有已关闭/已过期订单，不可恢复。确认清理？', 'aksrt')) . '\');">';
         echo '<input type="hidden" name="action" value="aksrt_pay_clear_closed_orders" />';