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。

tools/build-public-assets.mjs

@@ -10,10 +10,8 @@ const cssBuildDir = path.join(repoRoot, 'assets/css/build');
 const jsBuildDir = path.join(repoRoot, 'assets/js/build');
 
 const cssBundles = {
+  // bootstrap / fontawesome5 / main.min.css 由 PHP 单独入队，不在此重复打包。
   'public.css': [
-    'assets/css/bootstrap.min.css',
-    'assets/fontawesome5/css/all.min.css',
-    'assets/css/main.min.css',
     'style.css',
     'assets/css/core/tokens.css',
     'assets/css/core/reset.css',
@@ -61,14 +59,8 @@ const cssBundles = {
   ],
 };
 
-const publicScripts = [
-  'assets/js/runtime/libs/bootstrap.min.js',
-  'assets/js/runtime/loader.js',
-  'assets/js/lazy-image-attr.js',
-  'assets/js/rehydrate.js',
+const runtimePreludeScripts = [
   'assets/js/notyf.js',
-  'assets/js/aksrt-runtime.js',
-  'assets/js/grade.min.js',
   'assets/js/core/modal-telemetry.js',
   'assets/js/core/request.js',
   'assets/js/core/modal-cache.js',
@@ -84,16 +76,20 @@ const publicScripts = [
   'assets/js/core/archive.js',
   'assets/js/core/footer-tabbar.js',
   'assets/js/core/misc.js',
+  'assets/js/core/theme.js',
   'assets/js/follow.js',
   'assets/js/enhancements.js',
   'assets/js/enhancements2.js',
   'assets/js/color-extract.js',
   'assets/js/effects.js',
-  'assets/js/runtime/main.min.js',
   'assets/js/captcha-front.js',
   'assets/js/instant-page.js',
 ];
 
+const imgboxScripts = [
+  'assets/js/runtime/imgbox.js',
+];
+
 function normalizePath(filePath) {
   return filePath.split(path.sep).join('/');
 }
@@ -164,31 +160,25 @@ async function buildCssBundle(outputName, sources) {
   ]);
 }
 
-async function buildScriptBundle() {
+async function buildScriptBundle(sources, outputName) {
   const sections = [];
-  for (const source of publicScripts) {
+  for (const source of sources) {
     const content = (await readFile(path.join(repoRoot, source), 'utf8')).trimEnd();
     sections.push(`/* source: ${source} */\n${content}\n;`);
   }
-  await writeFile(path.join(jsBuildDir, 'public.js'), `${sections.join('\n\n')}\n`, 'utf8');
-}
-
-async function buildRuntimeMainMin() {
-  const sourcePath = path.join(repoRoot, 'assets/js/runtime/main.js');
-  const outputPath = path.join(repoRoot, 'assets/js/runtime/main.min.js');
-  const source = await readFile(sourcePath, 'utf8');
-  const minified = await transform(source, {
+  const bundle = `${sections.join('\n\n')}\n`;
+  const minified = await transform(bundle, {
     charset: 'utf8',
     legalComments: 'inline',
     loader: 'js',
+    // 保留原始标识符：压缩产生的 `$` 局部变量会破坏「禁用美元别名」契约。
     minifyIdentifiers: false,
     minifySyntax: true,
     minifyWhitespace: true,
-    sourcefile: 'runtime/main.js',
+    sourcefile: outputName,
   });
-  await writeFile(outputPath, minified.code, 'utf8');
+  await writeFile(path.join(repoRoot, outputName), minified.code, 'utf8');
 }
-
 // 评论区硬切换后 main.min.css 由 main.css 重新生成，保持两者同步。
 async function buildMainMin() {
   const sourcePath = path.join(repoRoot, 'assets/css/main.css');
@@ -206,12 +196,12 @@ async function buildMainMin() {
 
 await mkdir(cssBuildDir, { recursive: true });
 await mkdir(jsBuildDir, { recursive: true });
-await buildRuntimeMainMin();
 // 先刷新 main.min.css，public.css 打包时才能读到最新内容。
 await buildMainMin();
 for (const [outputName, sources] of Object.entries(cssBundles)) {
   await buildCssBundle(outputName, sources);
 }
-await buildScriptBundle();
+await buildScriptBundle([...runtimePreludeScripts, 'assets/js/runtime/main.js'], 'assets/js/runtime/main.min.js');
+await buildScriptBundle(imgboxScripts, 'assets/js/runtime/imgbox.min.js');
 
-console.log('Built public CSS and JS bundles.');
+console.log('Built public CSS and runtime JS bundles.');