docs: annotate payment, host operations and shared components

app/components/TicketNotice.vue

@@ -1,4 +1,5 @@
 <script>
+/** 加载 /ticket/config 中启用的工单通知；失败可手动重试，富文本经过统一清理后展示。 */
 import { toDisplayString } from "vue";
 import { onMounted } from "vue";
 import { onBeforeUnmount } from "vue";
@@ -27,6 +28,7 @@ var _ = [`innerHTML`],
           x = ref(!1),
           S = !1;
         async function C() {
+          // loading 防止重复请求，S 标记卸载，异步响应不应写入已离开的页面。
           if (!x.value) {
             ((x.value = !0), (b.value = ``));
             try {