feat(runtime): 全站前端脚本统一接入 AksrtFrontend 全局 DOM 生命周期

- rehydrate.js 新增 boot()/aksrt:ready 事件，支持 boot 后晚注册立即以 init 触发
- aksrt-runtime.js 初始加载改走 AksrtFrontend.boot，tooltip/倒计时注册为组件
- 约 30 个前端脚本（首页、评论、支付、路由、页面叶子、widgets）
  从直接 DOMContentLoaded 迁移为 AksrtFrontend.register，并加幂等标记
- section-navs 依赖改为 aksrt-runtime，保证注册时序
- 清理死代码：删除孤儿 loader.js/main.js 及 runtime/page-navs 遗留副本
- loader.js 移除已迁移模块的 tbquire 路径映射，main.js 相应瘦身
- build-public-assets.mjs 增加 runtime/main.min.js 自动压缩步骤
- 新增 4 个契约测试（homepage-dom/rehydrate-runtime/global-dom-init/
  public-bundle-parity），3 个既有 harness 适配注册表初始化方式

assets/js/page-navs.js

@@ -28,7 +28,10 @@
     searchQuery: '',
     ajaxInFlight: null,
 
-    init: function () {
+    init: function (root) {
+      this.root = root || document;
+      if (this.root.__aksrtPageNavInitialized) return;
+      this.root.__aksrtPageNavInitialized = true;
       this.initTocHighlight();
       this.initSmoothScroll();
       this.initDocSearch();
@@ -40,7 +43,8 @@
      * TOC 高亮（文档阅读页）
      * ============================================================ */
     initTocHighlight: function () {
-      var toc = document.querySelector('.aksrt-doc-toc');
+      var toc = this.root.querySelector('.aksrt-doc-toc');
+      if (this.root.nodeType === 1 && this.root.matches('.aksrt-doc-toc')) toc = this.root;
       if (!toc) return;
 
       this.tocItems = Array.from(toc.querySelectorAll('.aksrt-doc-toc__item a'));
@@ -92,7 +96,9 @@
      * 平滑滚动
      * ============================================================ */
     initSmoothScroll: function () {
-      document.addEventListener('click', function (e) {
+      if (this.root.__aksrtPageNavSmoothBound) return;
+      this.root.__aksrtPageNavSmoothBound = true;
+      this.root.addEventListener('click', function (e) {
         var link = e.target.closest('a[href^="#"]');
         if (!link) return;
 
@@ -113,11 +119,11 @@
      * 文档搜索（AJAX 接管）
      * ============================================================ */
     initDocSearch: function () {
-      var searchInput = document.querySelector('.aksrt-doc-search__input');
+      var searchInput = this.root.querySelector('.aksrt-doc-search__input');
       if (!searchInput) return;
 
-      var resultsContainer = document.querySelector('.aksrt-doc-search__results');
-      var takeover = document.querySelector('.aksrt-doc-takeover');
+      var resultsContainer = this.root.querySelector('.aksrt-doc-search__results');
+      var takeover = this.root.querySelector('.aksrt-doc-takeover');
       var self = this;
 
       var debounceTimer = null;
@@ -206,7 +212,7 @@
         resultsContainer.innerHTML = '';
       }
       // 显示所有卡片
-      var cards = document.querySelectorAll('.aksrt-doc-index-card');
+      var cards = this.root.querySelectorAll('.aksrt-doc-index-card');
       cards.forEach(function (card) { card.style.display = ''; });
     },
 
@@ -231,7 +237,7 @@
      * 分类切换 — AJAX 加载 + 分页
      * ============================================================ */
     initCategoryChips: function () {
-      var toolbar = document.querySelector('.aksrt-doc-toolbar');
+      var toolbar = this.root.querySelector('.aksrt-doc-toolbar');
       if (!toolbar) return;
 
       var chips = toolbar.querySelectorAll('.aksrt-doc-toolbar__chip[data-cat-id]');
@@ -260,7 +266,7 @@
       }
 
       var self = this;
-      var grid = document.querySelector('.aksrt-doc-grid');
+      var grid = this.root.querySelector('.aksrt-doc-grid');
       if (!grid) return;
 
       // 显示加载状态
@@ -305,7 +311,7 @@
     },
 
     updateMetaCount: function (total) {
-      var meta = document.querySelector('.aksrt-doc-toolbar__meta');
+      var meta = this.root.querySelector('.aksrt-doc-toolbar__meta');
       if (meta) {
         meta.textContent = total + ' 篇文档';
       }
@@ -316,7 +322,7 @@
      * ============================================================ */
     initPagination: function () {
       var self = this;
-      var paginationContainer = document.querySelector('.aksrt-doc-pagination');
+      var paginationContainer = this.root.querySelector('.aksrt-doc-pagination');
       if (!paginationContainer) return;
 
       paginationContainer.addEventListener('click', function (e) {
@@ -331,7 +337,7 @@
         self.loadCategoryDocs(self.activeCategory, page);
 
         // 滚动到顶部
-        var grid = document.querySelector('.aksrt-doc-grid');
+        var grid = self.root.querySelector('.aksrt-doc-grid');
         if (grid) {
           grid.scrollIntoView({ behavior: 'smooth', block: 'start' });
         }
@@ -342,7 +348,7 @@
       this.totalPages = totalPages;
       this.currentPage = currentPage;
 
-      var container = document.querySelector('.aksrt-doc-pagination');
+      var container = this.root.querySelector('.aksrt-doc-pagination');
       if (!container) return;
 
       if (totalPages <= 1) {
@@ -394,7 +400,7 @@
     },
 
     filterDocItems: function (query) {
-      var cards = document.querySelectorAll('.aksrt-doc-index-card');
+      var cards = this.root.querySelectorAll('.aksrt-doc-index-card');
       if (cards.length > 0) {
         cards.forEach(function (card) {
           var title = card.querySelector('.aksrt-doc-index-card__title');
@@ -408,7 +414,7 @@
         });
       }
 
-      var sidebarItems = document.querySelectorAll('.aksrt-doc-sidebar__item');
+      var sidebarItems = this.root.querySelectorAll('.aksrt-doc-sidebar__item');
       if (sidebarItems.length > 0) {
         sidebarItems.forEach(function (item) {
           var link = item.querySelector('.aksrt-doc-sidebar__link');
@@ -446,9 +452,7 @@
     }
   };
 
-  if (document.readyState === 'loading') {
-    document.addEventListener('DOMContentLoaded', function () { PAGE_NAVS.init(); });
-  } else {
-    PAGE_NAVS.init();
-  }
+  window.AksrtFrontend.register('aksrt-page-navs', function (root) {
+    PAGE_NAVS.init(root);
+  });
 })();