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)

src/Frontend/InlineStyleBuilder.php

@@ -37,7 +37,7 @@ class InlineStyleBuilder {
         $dark_hover  = $this->adjust_hex_color($dark_primary, -0.12);
         $dark_active = $this->adjust_hex_color($dark_primary, -0.22);
 
-        // Zibll hard-codes 311px dual-column math; keep runtime width aligned to that
+        // legacy hard-codes 311px dual-column math; keep runtime width aligned to that
         // baseline when settings still hold the old 300 default (or empty).
         $sidebar_width = (int) ($sidebar_cfg['width'] ?? 311);
         if ($sidebar_width <= 0 || $sidebar_width === 300) {
@@ -50,7 +50,7 @@ class InlineStyleBuilder {
             '--content-no-sidebar-max' => $content_no_sidebar_max,
             '--container'              => $content_width,
             '--container-wide'         => $container_wide,
-            '--mian-max-width'         => $content_width, // zibll typo token
+            '--mian-max-width'         => $content_width, // legacy typo token
             '--sidebar-width'          => $sidebar_width . 'px',
             '--color-primary'          => $primary_color,
             '--color-primary-hover'    => $primary_hover,
@@ -62,7 +62,7 @@ class InlineStyleBuilder {
             '--radius-sm'              => $radius_sm . 'px',
             '--radius'                 => $border_radius . 'px',
             '--radius-card'            => $card_radius . 'px',
-            // Zibll --main-radius tracks the base radius (8), not the larger card radius.
+            // legacy --main-radius tracks the base radius (8), not the larger card radius.
             '--main-radius'            => $border_radius . 'px',
             '--radius-btn'             => $border_radius . 'px',
             '--radius-code'            => $border_radius . 'px',
@@ -115,7 +115,7 @@ class InlineStyleBuilder {
 			echo '<style id="aksrt-post-list-mobile-meta">@media (max-width:640px){.meta-right .meta-' . esc_attr($mobile_meta) . '{display:unset!important}}</style>' . "\n";
 		}
 
-        // Zibll header_theme_custom → --header-bg / --header-color on .header.
+        // legacy header_theme_custom → --header-bg / --header-color on .header.
         if (class_exists('\AKSRT\Settings\Settings')) {
             $ht = \AKSRT\Settings\Settings::get_header_theme_config();
             if (!empty($ht['custom'])) {

src/Frontend/NavWalker.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Nav walker — zibll senior submenu + meta decorations.
+ * Nav walker — legacy senior submenu + meta decorations.
  *
  * @package AKSRT
  */

src/Frontend/WeChatShare.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * WeChat JS-SDK share signature (zibll ZibWeChatShare parity).
+ * WeChat JS-SDK share signature (legacy parity).
  *
  * @package AKSRT
  */