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/aksrt-links.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * 网址导航 / 书签链接渲染（zibll pages/links.php + zib_links_box parity）.
+ * 网址导航 / 书签链接渲染（legacy pages/links.php + legacy parity）.
  *
  * @package AKSRT
  */
@@ -84,7 +84,7 @@ if (!function_exists('aksrt_get_page_links_settings')) :
 			'order'            => $order,
 			'go_s'             => (bool) get_post_meta($post_id, 'page_links_go_s', true),
 			'blank_s'          => (bool) get_post_meta($post_id, 'page_links_blank_s', true),
-			// Default nofollow ON (zibll default true).
+			// Default nofollow ON (legacy default true).
 			'nofollow_s'       => get_post_meta($post_id, 'page_links_nofollow_s', true) === ''
 				? true
 				: (bool) get_post_meta($post_id, 'page_links_nofollow_s', true),
@@ -101,7 +101,7 @@ endif;
 
 if (!function_exists('aksrt_links_box')) :
 	/**
-	 * Render bookmark cards (zibll zib_links_box).
+	 * Render bookmark cards (legacy).
 	 *
 	 * @param array<int,object|array> $links Bookmark rows from get_bookmarks().
 	 */
@@ -257,7 +257,7 @@ if (!function_exists('aksrt_page_links_html')) :
 				$offset_bottom = $is_mobile ? '20' : '-30';
 				$links_con     = '<div class="fixed-wrap">'
 					. '<div class="fixed-wrap-nav affix-header-sm affix link-nav-box tab-auto-center-sm" data-offset-top="' . esc_attr((string) $offset_top) . '" data-offset-bottom="' . esc_attr((string) $offset_bottom) . '">'
-					. '<div class="zib-widget"><ul class="nav list-inline scroll-x mini-scrollbar tab-nav-theme">' . $link_cat_nav . '</ul></div>'
+					. '<div class="aksrt-panel"><ul class="nav list-inline scroll-x mini-scrollbar tab-nav-theme">' . $link_cat_nav . '</ul></div>'
 					. $submit_nav
 					. '</div><div class="fixed-wrap-content">' . $link_cat_con . $submit_con . '</div></div>';
 			}
@@ -292,7 +292,7 @@ endif;
 
 if (!function_exists('aksrt_link_get_search_cover')) :
 	/**
-	 * Search cover with multi-engine tabs (zibll zib_link_get_search_cover).
+	 * Search cover with multi-engine tabs (legacy).
 	 */
 	function aksrt_link_get_search_cover(int $post_id = 0): string {
 		$post_id = $post_id > 0 ? $post_id : (int) get_queried_object_id();
@@ -393,7 +393,7 @@ endif;
 
 if (!function_exists('aksrt_submit_links_modal')) :
 	/**
-	 * Frontend submit modal markup (zibll zib_submit_links_modal).
+	 * Frontend submit modal markup (legacy).
 	 *
 	 * @param array{title?:string,dec?:string,sign?:bool,cats?:int[]} $args
 	 */