perf(comments): 评论加载提速 + 骨架屏 + 友链弹窗 pjax 修复 + toast 统一 Message.js

优化：
- initArtalk 加节点级幂等守卫（mount.__atkInited，失败回滚），
  消除 artalk.html/mypjax 多入口导致的 4× comments + 4× pv 重复请求
- fetch 包装层对无 body 的 GET/HEAD 去掉多余 content-type，
  消掉 Artalk 对 GET /comments 的 CORS 预检（按完整 URL 缓存，
  每篇文章都重付一次 RTT）。实测评论列表 +1150~1565ms → +626ms

修复：
- 评论列表骨架屏改注入 .atk-list-body（原骨架在 #Comments 内，
  被 Artalk.init 清空），list-loaded/故障/12s 兜底移除
- 友链申请弹窗抽成 modules/friendlink.js 进 page-only bundle
  （原内联脚本在 #pjax-container 外，pjax 后 flApplyOpenModal 未定义）
- toast 统一走本地化 Message.js/Qmsg 适配层（保留 window.Toast/showToast 旧 API）

文档：
- README / 架构总览 更新；新增 评论加载优化方案.md

themes/Ying/layouts/partials/footer.html

@@ -53,6 +53,9 @@
 {{ $iconfont := resources.Get "js/libs/iconfont.js" }}
 {{ $uikit := resources.Get "js/libs/uikit.min.js" }}
 {{ $viewimage := resources.Get "js/libs/view-image.min.js" }}
+{{/* Message.js（Qmsg）+ Toast 适配层放在 utils 之前，保证任何 toast 调用点执行时组件已就绪 */}}
+{{ $message := resources.Get "js/libs/message.min.js" }}
+{{ $toast := resources.Get "js/modules/toast.js" }}
 {{ $utils := resources.Get "js/modules/utils.js" }}
 {{ $loader := resources.Get "js/modules/loader.js" }}
 {{ $cache := resources.Get "js/modules/cache.js" }}
@@ -67,7 +70,7 @@
 {{ $lazyload := resources.Get "js/modules/lazyload.js" }}
 {{ $main := resources.Get "js/main.js" }}
 
-{{ $coreScripts := slice $iconfont $uikit $viewimage $utils $loader $cache $search $floatingTools $nprogress $pjaxLib $mypjax $pangu $linkify $shortcodesJs $lazyload $main | resources.Concat "js/core.js" | resources.Minify | resources.Fingerprint }}
+{{ $coreScripts := slice $iconfont $uikit $viewimage $message $toast $utils $loader $cache $search $floatingTools $nprogress $pjaxLib $mypjax $pangu $linkify $shortcodesJs $lazyload $main | resources.Concat "js/core.js" | resources.Minify | resources.Fingerprint }}
 
 <script defer src="{{ $coreScripts.RelPermalink }}"></script>
 
@@ -136,21 +139,24 @@
 
 {{/* 文章详情页专用JS */}}
 {{ if .IsPage }}
+  {{/* 友链申请弹窗放最前：artalk.js 渲染申请卡片时会调 window.flApplyOpenModal */}}
+  {{ $friendlink := resources.Get "js/modules/friendlink.js" }}
   {{ $artalkModule := resources.Get "js/modules/artalk.js" }}
   {{ $paragraphComments := resources.Get "js/modules/paragraph-comments.js" }}
   {{ $reward := resources.Get "js/modules/reward.js" }}
 
-  {{ $pageScripts := slice $artalkModule $paragraphComments $reward | resources.Concat "js/page-only.js" | resources.Minify | resources.Fingerprint }}
+  {{ $pageScripts := slice $friendlink $artalkModule $paragraphComments $reward | resources.Concat "js/page-only.js" | resources.Minify | resources.Fingerprint }}
 
   <script defer src="{{ $pageScripts.RelPermalink }}"></script>
   <script>window._pageOnlyScriptUrl = '{{ $pageScripts.RelPermalink }}';</script>
 {{ else }}
   {{/* 非文章页面：仍然计算URL，但不加载，用于PJAX动态加载 */}}
+  {{ $friendlink := resources.Get "js/modules/friendlink.js" }}
   {{ $artalkModule := resources.Get "js/modules/artalk.js" }}
   {{ $paragraphComments := resources.Get "js/modules/paragraph-comments.js" }}
   {{ $reward := resources.Get "js/modules/reward.js" }}
 
-  {{ $pageScripts := slice $artalkModule $paragraphComments $reward | resources.Concat "js/page-only.js" | resources.Minify | resources.Fingerprint }}
+  {{ $pageScripts := slice $friendlink $artalkModule $paragraphComments $reward | resources.Concat "js/page-only.js" | resources.Minify | resources.Fingerprint }}
 
   <script>window._pageOnlyScriptUrl = '{{ $pageScripts.RelPermalink }}';</script>
 {{ end }}
@@ -169,31 +175,7 @@
   <script defer src="{{ $tiaozhuan.RelPermalink }}"></script>
 {{ end }}
 
-{{/* ====== 5. 延迟加载的非关键JS ====== */}}
-{{ $toast := resources.Get "js/modules/toast.js" }}
-
-{{ $deferredScripts := slice $toast | resources.Concat "js/deferred.js" | resources.Minify | resources.Fingerprint }}
-
-<script>
-  // 使用requestIdleCallback在浏览器空闲时加载
-  if ('requestIdleCallback' in window) {
-    requestIdleCallback(function() {
-      var script = document.createElement('script');
-      script.src = '{{ $deferredScripts.RelPermalink }}';
-      script.defer = true;
-      document.body.appendChild(script);
-    });
-  } else {
-    setTimeout(function() {
-      var script = document.createElement('script');
-      script.src = '{{ $deferredScripts.RelPermalink }}';
-      script.defer = true;
-      document.body.appendChild(script);
-    }, 1000);
-  }
-</script>
-
-{{/* ====== 6. 第三方脚本 ====== */}}
+{{/* ====== 5. 第三方脚本 ====== */}}
 <script async src="/js/bsz.js"></script>
 </body>