fix(runtime): 按参考主题硬切换为 loader/main/auto_fun 单一 DOM 生命周期

- 删除 AksrtFrontend registry/rehydrate 双路架构及 build/public.js 拼包入口，
  前台唯一初始路径为 PHP 本地栈（jQuery 1.9.1 → Bootstrap 3.4.1）
  → loader_js（_win/aksrtData 唯一注入）→ tbquire(['main']) → runtime/main.min.js
- window.auto_fun = debounce(z_auto_fun, 100) 为唯一重扫入口；所有模块改为
  执行一次 + off/on('auto_fun.aksrt-*') 命名空间重扫，data/class 标记幂等
- 局部更新协议统一：HTML 注入 → post_ajax.ed → auto_fun()；
  远程 modal → loaded.bs.modal → auto_fun()；JSON 成功 → zib_ajax.success
- 灯箱恢复 Miniimgbox/imgbox 唯一 owner（imgbox-container、a[data-imgbox]、
  imgbox_data），删除 AksrtLightbox/data-aksrt-lightbox 第二实现及 CSS/overlay，
  _win.imgbox* 重新接上 post-display 设置
- 死代码清理：runtime 下 11 组被自有实现替代的旧模块副本、无消费 vendored 库、
  顶层 grade.min.js、revenue.js、无调用方的 aksrt_get_win_runtime_config()，
  以及 loader 中 16 条死 mapping
- PHP 入队改为本地栈 + loader_js，routed/widget/submit 依赖统一换绑；
  用户卡片发布按钮恢复 nav_user_newposts_btn 设置门控
- 测试对齐：新增 frontend-lifecycle-contract，重写 navigation/lazyload/toast/
  auth-source/comment/page-display/post-visual 等断言为目标架构契约

验证：node --test widget-system+navigation 223 通过 0 失败；
构建脚本重建 main/imgbox min 与 CSS bundles；改动 PHP php -l、JS node --check
全部通过；git diff --check 干净；credits 重入 harness 通过。

tests/widget-system/lazyload-contract.test.cjs

@@ -121,9 +121,9 @@ echo aksrt_lazy_content_images($html);
   assert.doesNotMatch(avatar, /loading=/);
 });
 
-test('the legacy runtime owns lazySizes while AKSRT consumers share one image-attribute bridge', () => {
+test('lazySizes has one auto_fun integration owner and loader boots main once', () => {
   const runtime = read('assets/js/runtime/main.js');
-  const bridge = read('assets/js/lazy-image-attr.js');
+  const integration = runtime;
   const scripts = read('src/Core/ScriptsPart1c.php');
   const routeScripts = read('src/Core/ScriptsPart1b.php');
   const builder = read('tools/build-public-assets.mjs');
@@ -133,17 +133,17 @@ test('the legacy runtime owns lazySizes while AKSRT consumers share one image-at
   const widgets = read('assets/widgets/frontend.js');
 
   assert.match(runtime, /window\.lazySizes = lazySizes/);
-  assert.match(bridge, /window\.aksrtGetLazyImageAttr = function/);
-  assert.match(builder, /assets\/js\/lazy-image-attr\.js/);
-  assert.match(builder, /assets\/js\/rehydrate\.js/);
   assert.match(builder, /assets\/js\/runtime\/main\.min\.js/);
-  assert.doesNotMatch(loader, /['"]main['"]\s*:|tbquire\(\[['"]main['"]\]\)/);
-  assert.match(scripts, /assets\/js\/build\/public\.js'[\s\S]*?\['jquery'\]/);
+  assert.match(loader, /['"]main['"]\s*:\s*['"]main\.min['"]/);
+  assert.match(loader, /tbquire\(\[['"]main['"]\]\)/);
+  assert.match(integration, /img\[data-src\]:not\(\.lazyload,\.lazyloaded,\.lazyloading,\.swiper-lazy\)/);
+  assert.match(integration, /new MutationObserver/);
+  assert.match(scripts, /'loader_js'[\s\S]*?assets\/js\/runtime\/loader\.js/);
   for (const file of ['pay-vip.js', 'order-center.js', 'page-navs.js', 'credits.js']) {
     const blocks = enqueueBlocksFor(routeScripts, file);
     assert.ok(blocks.length > 0, `${file} must be enqueued`);
     for (const block of blocks) {
-      assert.match(block, /aksrt-runtime/, `${file} must depend on the bundled image-attribute bridge`);
+      assert.match(block, /loader_js/, `${file} must depend on the bundled image-attribute bridge`);
     }
   }
   assert.match(runtime, /lazybeforeunveil/);