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/new-posts.min.css

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+.mce-top-part.affix{position:fixed}.mce-top-part.affix-bottom{position:absolute}.wp-editor-container{border:none;border-radius:0;overflow:hidden}.mce-toolbar-grp{border-bottom:none;background:0 0}.mce-flow-layout{white-space:unset;padding:0;opacity:.8;overflow-x:auto;transition:.2s}.mce-flow-layout:hover{opacity:.9}div.mce-statusbar{border-top:1px solid var(--main-border-color);border-top-width:1px}.mce-statusbar .mce-container-body{padding:3px 8px;overflow:hidden}.mce-toolbar .mce-btn-group .mce-btn,.qt-dfw{border-color:transparent!important;border-radius:4px;transition:.2s;margin:4px}div.mce-toolbar-grp{border-bottom:none;background:#fff}div.mce-toolbar-grp.mce-inline-toolbar-grp{--toolbar-bg:#fff;border:none;background:var(--toolbar-bg);border-radius:4px;box-shadow:0 1px 10px rgba(0,0,0,.2)}.dark-theme div.mce-toolbar-grp.mce-inline-toolbar-grp{--toolbar-bg:#242528}div.mce-inline-toolbar-grp.mce-arrow-down::after{border-top-color:var(--toolbar-bg)}div.mce-inline-toolbar-grp.mce-arrow-up::after{border-bottom-color:var(--toolbar-bg)}div.mce-inline-toolbar-grp.mce-arrow-up::before{border-bottom-color:var(--main-border-color)}div.mce-inline-toolbar-grp.mce-arrow-down::before{border-top-color:var(--main-border-color)}.mce-menu-item{transition:.2s;border-radius:4px;margin:2px 4px}i.mce-i-wp_adv::before{content:"\f347"}.mce-i-wp_adv{transition:.2s}.mce-active .mce-i-wp_adv{transform:scaleY(-100%)}div.mce-menu-item{transition:.1s}.mce-menu .mce-menu-item.mce-active.mce-menu-item-normal,.mce-menu .mce-menu-item.mce-active.mce-menu-item-preview,.mce-menu .mce-menu-item.mce-selected,.mce-menu .mce-menu-item:focus,.mce-menu .mce-menu-item:hover{background:var(--focus-color-opacity1);color:var(--focus-color)}.mce-menu-item.mce-active.mce-menu-item-normal .mce-ico,.mce-menu-item.mce-active.mce-menu-item-normal .mce-text{color:inherit}.mce-menu-item.mce-menu-item-preview.mce-active{border-left:none}.mce-primary button{color:#fff!important}.mce-toolbar .mce-btn-group .mce-btn.mce-btn-has-text,.mce-toolbar .mce-btn-group .mce-btn.mce-listbox{box-shadow:none;border-color:var(--main-border-color)!important;background:0 0}.mce-toolbar .mce-btn.mce-active .mce-open,.mce-toolbar .mce-btn:focus .mce-open,.mce-toolbar .mce-btn:hover .mce-open{border-left-color:var(--main-border-color)}.mce-grid td.mce-grid-cell div{width:22px;height:22px;border-color:var(--main-border-color)}.mce-toolbar .mce-colorbutton .mce-preview{bottom:2px;left:3px}.mce-menubtn.mce-fixed-width span{width:65px}.mce-toolbar .mce-btn-group .mce-btn.mce-listbox{border-radius:4px}.mce-toolbar .mce-btn-group .mce-btn:focus,.mce-toolbar .mce-btn-group .mce-btn:hover,.qt-dfw:focus,.qt-dfw:hover{border-color:transparent;border-radius:4px;background:var(--main-border-color);color:var(--focus-color);box-shadow:none;opacity:1}.mce-toolbar .mce-btn-group .mce-btn.mce-active,.mce-toolbar .mce-btn-group .mce-btn:active,.qt-dfw.active{opacity:1;background:var(--main-border-color);box-shadow:inset 0 0 0 1px var(--focus-color)}.mce-btn-flat.mce-active,.mce-btn-flat:active,.mce-btn-flat:focus,.mce-btn-flat:hover,.mce-textbox,.mce-window .mce-btn{background:var(--main-border-color)}.mce-window .mce-btn,.mce-window .mce-btn.mce-primary{box-shadow:none!important;border-color:transparent!important}.mce-window .mce-btn:focus,.mce-window .mce-btn:hover{background:var(--main-border-color);border-color:var(--main-border-color);color:var(--main-color);opacity:.8}.mce-panel .mce-btn i.mce-caret{border-color:transparent;border-top-color:var(--muted-color)!important;border-bottom-color:var(--muted-color)!important}.mce-menu-item .mce-caret{border-left-color:var(--muted-color)!important;border-color:transparent}div.wp-link-preview a.wplink-url-error{color:#2b92f7}#link-modal-title,#wp-link .query-notice,#wp-link .submitbox,#wp-link-wrap,.mce-window .mce-window-head{color:var(--main-color);background:var(--main-bg-color);border-color:var(--main-border-color)}#wp-link li{background-color:var(--muted-bg-color);color:var(--muted-2-color);border-color:var(--muted-border-color)}#wp-link li:hover{background:var(--main-bg-color);color:var(--main-color)}#wp-link li.selected{background:var(--main-bg-color);color:var(--focus-color)}#wp-link .query-results,.mce-checkbox i.mce-i-checkbox,.mce-textbox{background-color:var(--muted-bg-color);color:var(--muted-color);border-color:var(--main-border-color);border-radius:3px}.mce-label{text-shadow:none}.mce-container,.mce-container *,.mce-widget,.mce-widget *,.mce-window .mce-window-head .mce-title{color:var(--main-color)}.mce-toolbar .mce-btn .mce-ico{line-height:20px}.mce-top-part::before{box-shadow:0 1px 0 var(--main-border-color)}.mce-toolbar .mce-btn button,.qt-dfw{padding:3px}.mce-toolbar .mce-btn-group{padding:0}.wp-core-ui .button,.wp-core-ui .button-secondary{border:none!important;margin:3px!important;outline:0!important;border-radius:4px!important;background:rgba(51,155,248,.1)!important;color:#2f99f7!important;box-shadow:none!important;padding:4Line truncated