data 透传闭环：发货数据回显、回调带回，并限制 2KB

- 「查询发货数据」响应新增 data（下单透传原样回显，供自建发货页预填/展示）
- 回调 payload 带回 data（下单传 → 回调收，商户对接免回查）
- 创建订单 data 限制最长 2048 字节
- 文档更新：data 用途（自建页预填/回调/上游查单约定字段）、发货数据与回调示例
- 单测覆盖 data 回显

frontend/src/openapi/endpoints.ts

@@ -94,6 +94,7 @@ const deliveryOrderResponseExample = `{
     "game_uid": "4808146277",
     "role_name": "巫师哈丁12",
     "pay_score": 360,
+    "data": { "game_account": "4808146277", "game_channel": "ios-wechat", "role_name": "玩家名" },
     "good": { "title": "套装-糯粉咩咩", "image": "https://..." }
   }
 }`
@@ -196,14 +197,14 @@ export const endpoints: EndpointSpec[] = [
       { name: 'sku', type: 'string', required: true, desc: '商品标识，取自商品列表', example: 'suit_pink_sheep' },
       { name: 'quantity', type: 'int', desc: '数量，默认 1', example: '1' },
       { name: 'buyer_reference', type: 'string', desc: '买家标识/备注', example: 'buyer-001' },
-      { name: 'data', type: 'object', desc: '透传给发货流程的业务数据（区服、账号等），原样存储并回显' },
+      { name: 'data', type: 'object', desc: '透传业务数据（最长 2048 字节）。自建发货页模式会原样返回给「查询发货数据」用于预填/展示；回调 payload 也会带回；约定字段 game_account/game_channel/role_name 会同步给上游查单' },
     ],
     requestExample: `{
   "client_order_no": "shop-10001",
   "sku": "suit_pink_sheep",
   "quantity": 1,
   "buyer_reference": "buyer-001",
-  "data": { "server": "ios-wechat", "uid": "player-id" }
+  "data": { "game_account": "4808146277", "game_channel": "ios-wechat", "role_name": "玩家名" }
 }`,
     responseExample: `{
   "code": 0,
@@ -317,6 +318,7 @@ export const endpoints: EndpointSpec[] = [
       { name: 'game_uid', type: 'string', desc: 'UID / 角色编号' },
       { name: 'role_name', type: 'string', desc: '角色名' },
       { name: 'pay_score', type: 'int', desc: '消耗积分' },
+      { name: 'data', type: 'object', desc: '下单时透传的业务数据（原样返回，可用于预填玩家编号/展示区服）' },
       { name: 'good', type: 'object', desc: '上游商品详情' },
     ],
     notes: [

frontend/src/pages/OpenApiDocs.tsx

@@ -490,14 +490,15 @@ const callbackPayloadExample = `{
     "client_order_no": "shop-10001",
     "order_status": "delivered",
     "can_ship": false,
-    "product": { "sku": "suit_pink_sheep", "name": "套装-糯粉咩咩" },
+    "product_sku": "suit_pink_sheep",
     "quantity": 1,
     "amount": 105,
     "currency": "POINT",
     "provider_order_no": "PROV-xxxx",
     "failure_reason": "",
     "created_at": "2026-08-03T10:00:00+08:00",
-    "delivered_at": "2026-08-03T10:11:20+08:00"
+    "delivered_at": "2026-08-03T10:11:20+08:00",
+    "data": { "game_account": "4808146277", "game_channel": "ios-wechat", "role_name": "玩家名" }
   }
 }`