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)

assets/css/routes/user-home.css

@@ -1,12 +1,12 @@
 /**
  * AKSRT User Home / Author Page — 公开用户主页 & 作者归档页样式
  *
- * Zibll 风格作者页布局
+ * 原主题风格作者页布局
  * 在 /user/{nicename}/ 和 /author/{nicename}/ 加载
  */
 
 /* ============================================================
- * Author Hero — 统一的作者头区（与 zibll author-header 对齐）
+ * Author Hero — 统一的作者头区（与 legacy author-header 对齐）
  * ============================================================ */
 .aksrt-author-hero {
   position: relative;
@@ -120,7 +120,7 @@
   max-width: 520px;
 }
 
-/* Body stats row removed for Zibll author parity; counts live in tabs. */
+/* Body stats row removed for legacy author parity; counts live in tabs. */
 .aksrt-author-hero__stats {
   display: flex;
   flex-wrap: wrap;
@@ -399,7 +399,7 @@
   animation: panel-fade-in 0.25s ease;
 }
 
-/* Public author posts follow Zibll's full-width, two-column list. */
+/* Public author posts follow legacy's full-width, two-column list. */
 @media (min-width: 992px) {
   .aksrt-user-home #panel-posts .aksrt-user-home__post-list .posts-item {
     display: inline-flex;
@@ -498,7 +498,7 @@
 }
 
 
-/* Full-width public home (Zibll author: no commerce sidebar) */
+/* Full-width public home (legacy author: no commerce sidebar) */
 .aksrt-user-home .content-layout--no-sidebar .content-layout__primary {
   width: 100%;
   max-width: 100%;