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/header/aksrt-header-menu-search.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Layout-2 menu search remote panel (zibll menu_search / zib_get_search_box).
+ * Layout-2 menu search remote panel (legacy menu_search / legacy).
  *
  * @package AKSRT
  */
@@ -49,7 +49,7 @@ if (!function_exists('aksrt_ajax_menu_search')) :
 			wp_die('0');
 		}
 
-		// zibll contract: outer dropdown + inner .search-input.
+		// legacy contract: outer dropdown + inner .search-input.
 		echo '<div class="dropdown-menu hover-show-con">' . $search . '</div>'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 		wp_die();
 	}
@@ -57,7 +57,7 @@ endif;
 
 if (!function_exists('aksrt_ajax_search_box')) :
 	/**
-	 * AJAX: full Zibll search box loaded into the footer shell on first open.
+	 * AJAX: full legacy search box loaded into the footer shell on first open.
 	 */
 	function aksrt_ajax_search_box(): void {
 		$nonce = isset($_REQUEST['nonce'])
@@ -81,7 +81,7 @@ endif;
 
 if (!function_exists('aksrt_footer_navbar_search')) :
 	/**
-	 * Zibll footer search shell. The heavy search body is loaded once via remote-box.
+	 * legacy footer search shell. The heavy search body is loaded once via remote-box.
 	 */
 	function aksrt_footer_navbar_search(): void {
 		$show_on_404 = class_exists('\\AKSRT\\Settings\\Settings')
@@ -110,9 +110,9 @@ if (!function_exists('aksrt_footer_navbar_search')) :
 	}
 endif;
 
-if (!function_exists('aksrt_ajax_zibll_current_user_ping')) :
+if (!function_exists('aksrt_ajax_legacy_current_user_ping')) :
 	/** Satisfy the reference runtime's one-shot user-state refresh request. */
-	function aksrt_ajax_zibll_current_user_ping(): void {
+	function aksrt_ajax_legacy_current_user_ping(): void {
 		wp_send_json_success([
 			'logged_in' => is_user_logged_in(),
 			'user_id'   => get_current_user_id(),
@@ -124,6 +124,6 @@ add_action('wp_ajax_menu_search', 'aksrt_ajax_menu_search');
 add_action('wp_ajax_nopriv_menu_search', 'aksrt_ajax_menu_search');
 add_action('wp_ajax_search_box', 'aksrt_ajax_search_box');
 add_action('wp_ajax_nopriv_search_box', 'aksrt_ajax_search_box');
-add_action('wp_ajax_get_current_user', 'aksrt_ajax_zibll_current_user_ping');
-add_action('wp_ajax_nopriv_get_current_user', 'aksrt_ajax_zibll_current_user_ping');
+add_action('wp_ajax_get_current_user', 'aksrt_ajax_legacy_current_user_ping');
+add_action('wp_ajax_nopriv_get_current_user', 'aksrt_ajax_legacy_current_user_ping');
 add_action('wp_footer', 'aksrt_footer_navbar_search', 10);