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/Settings/PostDisplay.php

@@ -141,7 +141,7 @@ class PostDisplay {
         // Canonical render keys (used by aksrt_single_*). Legacy *_s aliases kept for older callers.
         $breadcrumbs = !isset($settings['breadcrumbs_single_s']) || !empty($settings['breadcrumbs_single_s']);
         $breadcrumbs_home = sanitize_text_field((string) ($settings['breadcrumbs_home_text'] ?? '首页'));
-        // Zibll breadcrumbs_single_text: true → last crumb is "正文"; false → full title.
+        // legacy breadcrumbs_single_text: true → last crumb is "正文"; false → full title.
         $breadcrumbs_single_text = !isset($settings['breadcrumbs_single_text']) || !empty($settings['breadcrumbs_single_text']);
         $prevnext = !isset($settings['post_prevnext_s']) || !empty($settings['post_prevnext_s']);
         $authordesc = !isset($settings['post_authordesc_s']) || !empty($settings['post_authordesc_s']);
@@ -227,7 +227,7 @@ class PostDisplay {
             // Canonical + legacy share.
             'share_enabled'            => $share_enabled,
             'share_s'                  => $share_enabled,
-            // Author card posts (Zibll user_card_box defaults).
+            // Author card posts (legacy user_card_box defaults).
             'author_card_limit'        => $author_card_limit,
             'author_card_orderby'      => $author_card_orderby,
             'author_card_style'        => $author_card_style,
@@ -240,7 +240,7 @@ class PostDisplay {
             'rewards_custom'           => !isset($settings['post_rewards_custom']) || !empty($settings['post_rewards_custom']),
             'rewards_min'              => $rewards_min,
             'rewards_max'              => $rewards_max,
-            // Content max height (Zibll article_maxheight_kg / article_maxheight).
+            // Content max height (legacy article_maxheight_kg / article_maxheight).
             'maxheight_enabled'        => $maxheight_enabled,
             'maxheight'                => $maxheight,
             'copyright_enabled'        => !isset($settings['post_copyright_enabled']) || !empty($settings['post_copyright_enabled']),
@@ -365,7 +365,7 @@ class PostDisplay {
             'submit_text'        => $submit_text !== '' ? $submit_text : __('提交评论', 'aksrt'),
             'box_placeholder'    => $box_placeholder !== '' ? $box_placeholder : __('说点什么吧...', 'aksrt'),
             'title'              => $title !== '' ? $title : __('评论', 'aksrt'),
-            // Extended zibll-parity settings.
+            // Extended legacy-parity settings.
             'close_comments'     => !empty($settings['comment_close_comments']),
             'hot_threshold'      => max(1, min(999, (int) ($settings['comment_hot_threshold'] ?? 10))),
             'quick_s'            => !isset($settings['comment_quick_s']) || !empty($settings['comment_quick_s']),
@@ -395,7 +395,7 @@ class PostDisplay {
 
     private static function normalize_comment_city_type(string $type): string {
         $type = sanitize_key($type);
-        // Map legacy zibll pro/city labels.
+        // Map legacy legacy pro/city labels.
         if ($type === 'pro') {
             return 'province';
         }
@@ -448,7 +448,7 @@ class PostDisplay {
     }
 
     /**
-     * Whether list pagination uses AJAX append (Zibll paging_ajax_s).
+     * Whether list pagination uses AJAX append (legacy paging_ajax_s).
      *
      * @param array<string,mixed>|null $settings
      */
@@ -462,7 +462,7 @@ class PostDisplay {
     }
 
     /**
-     * Whether AJAX list paging auto-loads on scroll (Zibll paging_ajax_ias_s).
+     * Whether AJAX list paging auto-loads on scroll (legacy paging_ajax_ias_s).
      *
      * @param array<string,mixed>|null $settings
      */