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/Payment/ChargeCard.php

@@ -159,7 +159,7 @@ class ChargeCard {
             }
         }
 
-        // Points card-pass: zibll points_pass_exchange_* (stored in aksrt_settings).
+        // Points card-pass: legacy points_pass_exchange_* (stored in aksrt_settings).
         $credits = ['enabled' => false, 'desc' => '', 'only_password' => true];
         $all = class_exists('\AKSRT\Settings\Settings') && method_exists('\AKSRT\Settings\Settings', 'get_all')
             ? \AKSRT\Settings\Settings::get_all()
@@ -435,7 +435,7 @@ class ChargeCard {
             if ($amount <= 0) {
                 return new \WP_Error('aksrt_card_amount', __('当前卡密可充值金额为0', 'aksrt'), ['status' => 400]);
             }
-            // Cash wallet first (Zibll pay_balance); fall back to points if wallet class missing.
+            // Cash wallet first (legacy pay_balance); fall back to points if wallet class missing.
             if (class_exists('\AKSRT\Credits\Balance')) {
                 $new = \AKSRT\Credits\Balance::add($user_id, $amount, 'card_pass_balance', [
                     'type'   => 'charge_card',