docs: annotate payment, host operations and shared components

app/components/OperationNotice.vue

@@ -1,4 +1,5 @@
 <script>
+/** 将父级 message/severity/details 转交给 operations 通知组；默认插槽仍正常渲染。 */
 import { onMounted } from "vue";
 import { renderSlot } from "vue";
 import { watch } from "vue";
@@ -20,6 +21,7 @@ var a = Object.assign(
       let a = r,
         o = useToast();
       function s() {
+        // 有逐项结果时不自动消失，便于用户检查；普通成功/失败通知按不同寿命自动关闭。
         a.message.trim() &&
           o.add({
             group: `operations`,