update order items

frontend/src/pages/order-items/__tests__/index.spec.ts

@@ -305,6 +305,7 @@ describe('OrderItemsPage', () => {
           SearchOutlined: { template: '<span />' },
           ReloadOutlined: { template: '<span />' },
           EyeOutlined: { template: '<span />' },
+          CopyOutlined: { template: '<span class="copy-icon-stub" />' },
           CascadeFilter: { template: '<div class="cascade-filter-stub" />' },
         },
       },
@@ -317,7 +318,7 @@ describe('OrderItemsPage', () => {
   it('renders page title and action buttons', async () => {
     await mountPage()
 
-    expect(wrapper.text()).toContain('订单子项')
+    expect(wrapper.text()).toContain('订单项管理')
     const buttons = wrapper.findAll('.ant-btn')
     const buttonTexts = buttons.map((b) => b.text())
     expect(buttonTexts.some((t) => t.includes('搜索'))).toBe(true)
@@ -446,7 +447,7 @@ describe('OrderItemsPage', () => {
     await nextTick()
 
     const drawerHtml = document.body.querySelector('.ant-drawer')?.innerHTML || ''
-    expect(drawerHtml).toContain('父订单摘要')
+    expect(drawerHtml).toContain('所属订单')
     expect(drawerHtml).toContain('ORD-20260101-001')
     expect(drawerHtml).toContain('199.99')
     expect(drawerHtml).toContain('189.99')
@@ -486,6 +487,20 @@ describe('OrderItemsPage', () => {
     expect(drawerHtml).toContain('暂无数据')
   })
 
+  it('shows placeholder when parent_order is null', async () => {
+    const { api } = await mountPage()
+    vi.mocked(api.get).mockResolvedValueOnce({ ...mockItemDetail, parent_order: null })
+
+    const buttons = Array.from(document.body.querySelectorAll('.ant-btn'))
+    const viewBtn = buttons.find((b) => b.textContent?.trim() === '查看')
+    viewBtn?.dispatchEvent(new MouseEvent('click', { bubbles: true }))
+    await flushPromises()
+    await nextTick()
+
+    const drawerHtml = document.body.querySelector('.ant-drawer')?.innerHTML || ''
+    expect(drawerHtml).toContain('无关联订单')
+  })
+
   it('shows error message when detail request fails', async () => {
     const { api } = await mountPage()
     const { message } = await import('ant-design-vue')