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-header-menu-buttons.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Header multi-function cluster (zibll zib_menu_button publish/VIP subset).
+ * Header multi-function cluster (legacy publish/VIP subset).
  *
  * @package AKSRT
  */
@@ -48,7 +48,7 @@ if (!function_exists('aksrt_normalize_header_cta_label')) :
 		}
 
 		if (stripos($label, '<i') === false) {
-			// No space between icon and label — spacing via CSS margin (zibll .but > .fa).
+			// No space between icon and label — spacing via CSS margin (legacy .but > .fa).
 			$label = '<i class="' . esc_attr($fallback_icon) . '" aria-hidden="true"></i><span class="navbar-cta-text">' . esc_html(wp_strip_all_tags($label)) . '</span>';
 		} else {
 			$label = preg_replace(
@@ -64,7 +64,7 @@ endif;
 
 if (!function_exists('aksrt_render_new_add_btns')) :
 	/**
-	 * Multi-type publish button (zibll newadd-btns).
+	 * Multi-type publish button (legacy newadd-btns).
 	 *
 	 * @param string[] $types
 	 */
@@ -117,7 +117,7 @@ if (!function_exists('aksrt_render_new_add_btns')) :
 				. '</a>';
 		}
 
-		// zibll: span.newadd-btns.hover-show > toggle chip + .hover-show-con.drop-newadd
+		// legacy: span.newadd-btns.hover-show > toggle chip + .hover-show-con.drop-newadd
 		// Paint classes (jb-*, but, radius) MUST live on the toggle — wrapper is layout-only
 		// (background forced transparent). Bare navbar-but has no .navbar-but-cluster shell.
 		// data-aksrt-newadd: JS may portal menu to body so chip width cannot track menu.
@@ -150,7 +150,7 @@ if (!function_exists('aksrt_render_header_menu_buttons')) :
 		];
 		$html = '';
 		if (!empty($cfg['enabled'])) {
-			// zibll default: but nowave jb-blue (+ radius).
+			// legacy default: but nowave jb-blue (+ radius).
 			$class = 'but nowave navbar-newposts';
 			$skin  = trim((string) ($cfg['class'] ?? ''));
 			if ($skin === '') {
@@ -168,7 +168,7 @@ if (!function_exists('aksrt_render_header_menu_buttons')) :
 			}
 		}
 
-		// VIP open CTA for guests / non-VIP (zibll: .pay-vip modal).
+		// VIP open CTA for guests / non-VIP (legacy: .pay-vip modal).
 		$user_id  = get_current_user_id();
 		$show_vip = false;
 		if (class_exists('\AKSRT\Settings\Settings')) {
@@ -192,7 +192,7 @@ if (!function_exists('aksrt_render_header_menu_buttons')) :
 						}
 					}
 				}
-				// zibll: span.hover-show wraps button + .hover-show-con.sub-vip-card
+				// legacy: span.hover-show wraps button + .hover-show-con.sub-vip-card
 				$html .= '<span class="hover-show inline-block navbar-vip-hover">';
 				$html .= '<a class="but jb-red radius payvip-icon ml10 navbar-cta ' . esc_attr($cls) . '" href="javascript:;"'
 					. ($user_id > 0 ? ' vip-level="1"' : '') . '>';