docs: explain instance billing and renewal workflows

app/components/instance/InstanceServiceInfo.vue

@@ -1,4 +1,5 @@
 <script>
+// 实例服务概览：统一展示状态、配置与计费信息，并为符合条件的欠费实例提供续费入口。
 import "~/assets/styles/FlowPacketPanel.-RJSx13z.css";
 import "~/assets/styles/InstanceServiceInfo.BftSVIeW.css";
 import { toDisplayString } from "vue";
@@ -112,6 +113,7 @@ var N = defineAsyncComponent(() =>
             W.value = !1;
           });
           let K = ref(!1),
+            // 兼容模块详情与主机附加字段的结构，密码默认脱敏后再生成明细行。
             q = computed(() => {
               let e = b.info ?? {},
                 t = instance_data_l(e.raw ?? e),