docs: annotate remaining routes layouts and view boundaries

app/pages/orders/order/pay.vue

@@ -1,4 +1,7 @@
 <script>
+/**
+ * 旧订单支付路由适配层：复用订单详情，详情页根据 /pay 后缀展示支付流程；本文件不自行确认支付结果。
+ */
 import "~/assets/styles/PaymentDialog.BNFKQF1U.css";
 import "~/assets/styles/_id_.gjoJy9S8.css";
 definePageMeta({
@@ -16,6 +19,7 @@ var a = defineComponent({
       composables_t({
         key: (e) => e.fullPath,
       }),
+      // 此路径只复用详情的支付模式，不自行产生支付成功状态。
       (t, r) => (openBlock(), createBlock(_id_))
     );
   },