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/search/aksrt-search-box.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Search box markup (zibll zib_get_search_box parity).
+ * Search box markup (legacy parity).
  *
  * Used by layout-2 menu_search AJAX panel and layout 1/3 .navbar-search.
  *
@@ -10,7 +10,7 @@
 defined('ABSPATH') || exit;
 
 if (!function_exists('aksrt_save_history_search')) :
-	/** Store the Zibll history_search cookie (newest first, maximum thirty). */
+	/** Store the legacy history_search cookie (newest first, maximum thirty). */
 	function aksrt_save_history_search(string $search): void {
 		$search = trim(wp_strip_all_tags($search));
 		$search_text = aksrt_get_search_keywords_text($search);
@@ -36,7 +36,7 @@ if (!function_exists('aksrt_save_history_search')) :
 endif;
 
 if (!function_exists('aksrt_get_main_search')) :
-	/** Zibll main-search defaults backed only by the reference option IDs. */
+	/** legacy main-search defaults backed only by the reference option IDs. */
 	function aksrt_get_main_search(array $args = [], bool $echo = false) {
 		$settings = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_all() : [];
 		$search_cat = !array_key_exists('search_cat', $settings) || !empty($settings['search_cat']);
@@ -139,7 +139,7 @@ endif;
 
 if (!function_exists('aksrt_get_search_box')) :
 	/**
-	 * zibll-compatible search box.
+	 * legacy-compatible search box.
 	 *
 	 * @param array<string,mixed> $args
 	 * @param bool                $echo
@@ -360,7 +360,7 @@ endif;
 
 if (!function_exists('aksrt_get_remote_box')) :
 	/**
-	 * Lazy remote HTML mount (zibll zib_get_remote_box).
+	 * Lazy remote HTML mount (legacy).
 	 *
 	 * @param array<string,mixed> $args
 	 */

inc/helpers/search/aksrt-search-posts.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Search panel hot posts (zibll zib_get_search_posts parity).
+ * Search panel hot posts (legacy parity).
  *
  * @package AKSRT
  */