docs: explain configuration inputs and authentication components

app/components/config/ConfigLoadingShell.vue

@@ -1,4 +1,5 @@
 <script>
+/** 商品配置的占位骨架；busy 仅表示加载状态，真实配置/报价仍由对应产品组件负责。 */
 import { renderList } from "vue";
 import { renderSlot } from "vue";
 import { createElementBlock } from "vue";