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-archive.php

@@ -24,7 +24,7 @@ endif;
 
 if (!function_exists('aksrt_resolve_post_list_render_config')) :
 	/**
-	 * Build the Zibll-shaped arguments used by every list surface.
+	 * Build the legacy-shaped arguments used by every list surface.
 	 *
 	 * @param array<string,mixed> $args {
 	 *   @type string               $context   home|category|tag|author|search|archive
@@ -90,7 +90,7 @@ endif;
 
 if (!function_exists('aksrt_archive_get_sort_state')) :
 	/**
-	 * Build the canonical Zibll orderby state for term archives.
+	 * Build the canonical legacy orderby state for term archives.
 	 *
 	 * @param array<string,mixed> $option Page-display orderby fieldset.
 	 * @return array{current:string,links:array<string,string>}
@@ -131,7 +131,7 @@ if (!function_exists('aksrt_archive_has_sidebar')) :
 	 * @param bool   $enabled   Page-level sidebar toggle.
 	 */
 	function aksrt_archive_has_sidebar(string $preferred = '', bool $enabled = true): bool {
-		// $preferred kept for call-site compat; visibility is settings/meta driven (zibll).
+		// $preferred kept for call-site compat; visibility is settings/meta driven (legacy).
 		unset($preferred);
 		if (!$enabled) {
 			return false;
@@ -284,7 +284,7 @@ endif;
 if (!function_exists('aksrt_archive_close_shell')) :
 	/**
 	 * Close a shared archive shell.
-	 * Sidebar is a sibling of .content-wrap (Zibll float dual-column).
+	 * Sidebar is a sibling of .content-wrap (legacy float dual-column).
 	 *
 	 * @param array<string,mixed> $args Shell args.
 	 */