fix(web): keep trajectory toolbar Duration/Turns/Calls/Export untranslated

Show the four toolbar terms in English even in the Simplified Chinese
dictionary, including their tooltips, aria labels, and the export failure
message, and update the pinned-zh specs to match.

packages/client/ui-trajectory/tests/toolbar.spec.tsx

@@ -39,7 +39,7 @@ describe('TrajectoryToolbar export', () => {
   it('renders the export button and dispatches the export callback on click', () => {
     const onExport = vi.fn()
     render(<TrajectoryToolbar {...baseProps({ onExport })} />)
-    const button = screen.getByRole('button', { name: '导出会话日志' })
+    const button = screen.getByRole('button', { name: 'Export session log' })
     fireEvent.click(button)
     expect(onExport).toHaveBeenCalledTimes(1)
   })
@@ -47,15 +47,15 @@ describe('TrajectoryToolbar export', () => {
   it('disables the button while an export is in flight and blocks dispatch', () => {
     const onExport = vi.fn()
     render(<TrajectoryToolbar {...baseProps({ exporting: true, onExport })} />)
-    const button = screen.getByRole('button', { name: '导出会话日志' }) as HTMLButtonElement
+    const button = screen.getByRole('button', { name: 'Export session log' }) as HTMLButtonElement
     expect(button.disabled).toBe(true)
     fireEvent.click(button)
     expect(onExport).not.toHaveBeenCalled()
   })
 
   it('surfaces an export failure as the button title', () => {
-    render(<TrajectoryToolbar {...baseProps({ exportError: '导出失败：internal boom' })} />)
-    const button = screen.getByRole('button', { name: '导出会话日志' })
-    expect(button.title).toBe('导出失败：internal boom')
+    render(<TrajectoryToolbar {...baseProps({ exportError: 'Export failed: internal boom' })} />)
+    const button = screen.getByRole('button', { name: 'Export session log' })
+    expect(button.title).toBe('Export failed: internal boom')
   })
 })

packages/client/ui-trajectory/tests/views.spec.tsx

@@ -336,9 +336,9 @@ describe('tab switching in ConversationRoot', () => {
     expect(screen.getByRole('toolbar', { name: '轨迹工具栏' })).toBeTruthy()
     expect(screen.getByRole('region', { name: 'Trajectory timeline' })).toBeTruthy()
     expect(view.container.querySelector('[data-conversation-composer-overlay]')).toBeTruthy()
-    fireEvent.click(screen.getByRole('button', { name: '折叠轮次' }))
+    fireEvent.click(screen.getByRole('button', { name: 'Collapse turns' }))
     expect(view.container.querySelector('[data-collapsed-summary="turn"]')).toBeTruthy()
-    fireEvent.click(screen.getByRole('button', { name: '展开轮次' }))
+    fireEvent.click(screen.getByRole('button', { name: 'Expand turns' }))
     expect(screen.getByRole('row', { name: /USER/ })).toBeTruthy()
     expect(screen.queryByTestId('chat-body')).toBeNull()
     await vi.waitFor(() => {
@@ -552,10 +552,10 @@ describe('tab switching in ConversationRoot', () => {
     expect(screen.getByRole('toolbar', { name: '轨迹工具栏' })).toBeTruthy()
     expect(screen.getByText('No timing data')).toBeTruthy()
     expect(screen.getByRole<HTMLButtonElement>('button', {
-      name: '折叠轮次',
+      name: 'Collapse turns',
     }).disabled).toBe(false)
     expect(screen.getByRole<HTMLButtonElement>('button', {
-      name: '折叠调用',
+      name: 'Collapse calls',
     }).disabled).toBe(false)
     expect(screen.queryByRole('row')).toBeNull()
     expect(screen.queryByText(/turns ·/)).toBeNull()
@@ -1127,7 +1127,7 @@ describe('session log export', () => {
     const b = await bench(historySnapshot(NODES))
     mount(b.slots)
     fireEvent.click(screen.getByRole('tab', { name: 'Trajectory' }))
-    fireEvent.click(screen.getByRole('button', { name: '导出会话日志' }))
+    fireEvent.click(screen.getByRole('button', { name: 'Export session log' }))
     await vi.waitFor(() => {
       expect(fetchMock).toHaveBeenCalledOnce()
     })
@@ -1143,7 +1143,7 @@ describe('session log export', () => {
     const b = await bench(historySnapshot(NODES))
     mount(b.slots)
     fireEvent.click(screen.getByRole('tab', { name: 'Trajectory' }))
-    fireEvent.click(screen.getByRole('button', { name: '导出会话日志' }))
+    fireEvent.click(screen.getByRole('button', { name: 'Export session log' }))
     await vi.waitFor(() => {
       const alert = screen.queryByRole('alert')
       expect(alert).not.toBeNull()
@@ -1167,7 +1167,7 @@ describe('TrajectoryView branches', () => {
         setActualDuration={(value) => { firstDuration.set(value) }}
       />,
     )
-    const duration = screen.getByRole('button', { name: '使用实际时长' })
+    const duration = screen.getByRole('button', { name: 'Use actual duration' })
 
     expect(duration.getAttribute('aria-pressed')).toBe('false')
     fireEvent.click(duration)
@@ -1183,7 +1183,7 @@ describe('TrajectoryView branches', () => {
         setActualDuration={(value) => { restoredDuration.set(value) }}
       />,
     )
-    expect(screen.getByRole('button', { name: '使用实际时长' }).getAttribute('aria-pressed'))
+    expect(screen.getByRole('button', { name: 'Use actual duration' }).getAttribute('aria-pressed'))
       .toBe('true')
   })