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/homepage-fixed.js

@@ -424,6 +424,7 @@
 		var tablists = (scope || document).querySelectorAll('[data-aksrt-home-tabs]');
 
 		tablists.forEach(function (list, listIndex) {
+			if (list.dataset.aksrtHomeTabsBound === '1') return;
 			var stream = list.closest('.aksrt-homepage__stream');
 			if (!stream) return;
 
@@ -431,6 +432,7 @@
 			var panels = Array.from(stream.querySelectorAll('[data-home-tab-panel]'));
 
 			if (buttons.length < 2 || !panels.length) return;
+			list.dataset.aksrtHomeTabsBound = '1';
 
 			function getPanel(button) {
 				var target = button.getAttribute('data-home-tab-target');
@@ -539,12 +541,14 @@
 	 * Sortbar Dropdown Toggle
 	 * ============================================================ */
 
-	function initSortbarDropdown() {
-		document.querySelectorAll('[data-sort-dropdown-trigger]').forEach(function (trigger) {
+	function initSortbarDropdown(scope) {
+		(scope || document).querySelectorAll('[data-sort-dropdown-trigger]').forEach(function (trigger) {
+			if (trigger.dataset.aksrtSortDropdownBound === '1') return;
 			var wrapper = trigger.closest('.aksrt-homepage__sortbar-dropdown');
 			if (!wrapper) return;
 			var menu = wrapper.querySelector('.aksrt-homepage__sortbar-dropdown-menu');
 			if (!menu) return;
+			trigger.dataset.aksrtSortDropdownBound = '1';
 
 			function close() {
 				menu.setAttribute('hidden', '');
@@ -599,10 +603,11 @@
 	 * Sortbar AJAX
 	 * ============================================================ */
 
-	function initSortbar() {
-		document.querySelectorAll('.aksrt-homepage__stream').forEach(function (stream) {
+	function initSortbar(scope) {
+		(scope || document).querySelectorAll('.aksrt-homepage__stream').forEach(function (stream) {
 			var sortbar = stream.querySelector('.aksrt-homepage__sortbar');
-			if (!sortbar || !isSortAjaxEnabled(sortbar)) return;
+			if (!sortbar || !isSortAjaxEnabled(sortbar) || sortbar.dataset.aksrtSortbarBound === '1') return;
+			sortbar.dataset.aksrtSortbarBound = '1';
 
 			sortbar.addEventListener('click', function (event) {
 				var link = event.target.closest('.aksrt-homepage__sortbar-link, .aksrt-homepage__sortbar-dropdown-item');
@@ -649,10 +654,11 @@
 		return isNaN(offset) ? 60 : offset;
 	}
 
-	function initStickyTabs() {
+	function initStickyTabs(scope) {
 		if (!isStickyTabsEnabled()) return;
 
-		document.querySelectorAll('.aksrt-homepage__tabs.home-tab-nav-box').forEach(function (tabs) {
+		(scope || document).querySelectorAll('.aksrt-homepage__tabs.home-tab-nav-box').forEach(function (tabs) {
+			if (tabs.dataset.aksrtStickyTabsBound === '1') return;
 			var parent = tabs.parentNode;
 			var sentinel = tabs.previousElementSibling;
 			var canUseSticky = supportsStickyPosition();
@@ -660,6 +666,7 @@
 			var observer = null;
 
 			if (!parent || tabs.getAttribute('data-sticky-tabs') === 'false') return;
+			tabs.dataset.aksrtStickyTabsBound = '1';
 
 			if (!sentinel || !sentinel.classList.contains('aksrt-homepage__tabs-sentinel')) {
 				sentinel = document.createElement('div');
@@ -718,16 +725,13 @@
 	 * Init
 	 * ============================================================ */
 
-	function init() {
-		initHomeTabs();
-		initSortbarDropdown();
-		initSortbar();
-		initStickyTabs();
+	function init(root) {
+		var scope = root || document;
+		initHomeTabs(scope);
+		initSortbarDropdown(scope);
+		initSortbar(scope);
+		initStickyTabs(scope);
 	}
 
-	if (document.readyState === 'loading') {
-		document.addEventListener('DOMContentLoaded', init);
-	} else {
-		init();
-	}
+	window.AksrtFrontend.register('aksrt-homepage', init);
 })();