加强发货提交可靠性并统一契约口径

- 发货提交记录阶段推进与失败分类，失败不再清空 result_data
- 超时巡检区分已提交上游与提交中断两类卡单，避免误判
- 已提交上游的失败订单禁止自动重发，防止重复发货
- ship_attempts 仅在 claim 时计数，失败阶段只记录分类信息
- CanFulfill 对已提交上游的失败单返回不可发货
- 删除预留的 pending 订单状态，统一订单状态模型
- 契约改名：order.fulfillment.updated -> order.shipping.updated，fulfillment:read -> shipping:read
- 文档修正 scope 为或关系

frontend/src/pages/Dashboard.tsx

@@ -161,12 +161,6 @@ export default function Dashboard() {
         <Col xs={24} lg={14}>
           <Card title="订单状态">
             <Space direction="vertical" size="middle" style={{ width: '100%' }}>
-              <StatusLine
-                label="待支付"
-                value={stats?.pending_order_count ?? 0}
-                total={stats?.order_count ?? 0}
-                color="#faad14"
-              />
               <StatusLine
                 label="待发货"
                 value={stats?.paid_order_count ?? 0}

frontend/src/pages/MerchantCenter.tsx

@@ -42,7 +42,6 @@ import type {
 } from '../types'
 
 const orderStatusMap: Record<string, { color: string; text: string }> = {
-  pending: { color: 'orange', text: '待支付' },
   paid: { color: 'blue', text: '待发货' },
   delivering: { color: 'cyan', text: '发货中' },
   delivered: { color: 'green', text: '已交付' },
@@ -61,13 +60,13 @@ const scopeOptions = [
   { value: 'products:read', label: '商品读取' },
   { value: 'orders:read', label: '订单读取' },
   { value: 'orders:write', label: '订单写入' },
-  { value: 'fulfillment:read', label: '发货读取' },
+  { value: 'shipping:read', label: '发货读取' },
   { value: 'wallet:read', label: '钱包读取' },
 ]
 
 const eventOptions = [
   { value: 'order.created', label: '订单创建' },
-  { value: 'order.fulfillment.updated', label: '发货更新' },
+  { value: 'order.shipping.updated', label: '发货更新' },
   { value: 'order.cancelled', label: '订单取消' },
 ]
 
@@ -665,7 +664,7 @@ export default function MerchantCenter({ fixedTab, title = '商户中心' }: Mer
         <Typography.Text type="secondary">回调事件通过 outbox 持久化发送。</Typography.Text>
         {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
           callbackForm.resetFields()
-          callbackForm.setFieldsValue({ events: ['order.fulfillment.updated'] })
+          callbackForm.setFieldsValue({ events: ['order.shipping.updated'] })
           setCallbackOpen(true)
         }}>新增回调</Button>}
       </Space>

frontend/src/pages/OpenApiDocs.tsx

@@ -489,7 +489,7 @@ POST /orders 下单（client_order_no 幂等）
     ↓
 发货平台通过上游回调更新 order_status
     ↓
-GET /orders/{order_no} 轮询，或接收 order.fulfillment.updated 回调`}</pre>
+GET /orders/{order_no} 轮询，或接收 order.shipping.updated 回调`}</pre>
         }
       />
     </SectionWrap>