docs: annotate remaining routes layouts and view boundaries

app/pages/help.vue

@@ -232,6 +232,7 @@ var me = {
           onBeforeUnmount(() => {
             ((X = !0), J++, Y++);
           }),
+          // 目录与文章分别显示加载/错误，正文与附件使用公共清理/解析工具；嵌入模式不改变业务请求。
           (n, r) => {
             let i = button,
               o = inputicon,