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/admin/src/schema/sections/post-list/list.js

@@ -1,4 +1,4 @@
-/** Zibll 9.0 article-list settings. */
+/** legacy 9.0 article-list settings. */
 export const listSchema = {
   key: 'post_list.list',
   title: '文章列表',

assets/admin/src/schema/sections/post-list/page.js

@@ -118,7 +118,7 @@ export const pageSchema = {
           { label: '图文卡片', value: 'img' },
           { label: '列表', value: 'list' },
           { label: '纯文字', value: 'text' },
-        ], dependsOn: { key: 'post_related_s', value: true }, help: '对齐 Zibll 相关文章三种样式' },
+        ], dependsOn: { key: 'post_related_s', value: true }, help: '对齐 legacy 相关文章三种样式' },
         { key: 'related_title', label: '推荐标题', type: 'input', default: '相关推荐', dependsOn: { key: 'post_related_s', value: true } },
         { key: 'post_related_n', label: '推荐数量', type: 'number', default: 6, min: 4, max: 12, step: 2, dependsOn: { key: 'post_related_s', value: true } },
         { key: 'post_related_orderby', label: '推荐排序', type: 'select', default: 'views', options: [

assets/admin/src/schema/sections/post-list/thumb.js

@@ -1,4 +1,4 @@
-/** Zibll 9.0 list-thumbnail settings. */
+/** legacy 9.0 list-thumbnail settings. */
 const themeRoot = typeof window !== 'undefined' && window.aksrtAdminData?.themeUri
   ? String(window.aksrtAdminData.themeUri).replace(/\/$/, '')
   : ''