fix: 优化交接记录显示，将技术标识转换为用户友好文字

问题：
- 交接记录显示原始技术标识（owner_handoff, renter_checkout 等）
- 用户体验不佳，难以理解记录含义

改进：
- 添加 formatHandoffRecordType 函数统一格式化交接记录类型
- 映射关系：
  - owner_handoff → 卖家交接
  - renter_checkout → 买家结账
  - owner_counter_checkout → 卖家反驳结账
  - renter_confirm_checkout → 买家确认结账
  - owner_accept_checkout → 卖家接受结账
- 同时优化PC端订单详情和管理后台订单详情

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/features/orders/views/OrderDetailView.vue

@@ -611,6 +611,17 @@ function linesToList(value: string) {
     .map((item) => item.trim())
     .filter(Boolean)
 }
+
+function formatHandoffRecordType(type: string) {
+  const typeMap: Record<string, string> = {
+    owner_handoff: '卖家交接',
+    renter_checkout: '买家结账',
+    owner_counter_checkout: '卖家反驳结账',
+    renter_confirm_checkout: '买家确认结账',
+    owner_accept_checkout: '卖家接受结账',
+  }
+  return typeMap[type] || type
+}
 </script>
 
 <template>
@@ -708,7 +719,7 @@ function linesToList(value: string) {
           placement="top"
         >
           <div class="timeline-content">
-            <div class="timeline-title">{{ record.type }}</div>
+            <div class="timeline-title">{{ formatHandoffRecordType(record.type) }}</div>
             <div class="timeline-body">{{ record.content }}</div>
           </div>
         </el-timeline-item>