fix(ui-trajectory): preserve thinking label

packages/client/ui-trajectory/src/client/TrajectoryTable.tsx

@@ -1232,7 +1232,7 @@ function MarkdownRecordContent({
             aria-expanded={thinkingExpanded}
             onClick={() => { onThinkingExpandedChange(!thinkingExpanded) }}
           >
-            {thinkingExpanded ? 'Hide thinking' : 'Show thinking'}
+            Thinking
             <IconChevronRightOutline14 className={css.thinkingChevron} size={12} />
           </button>
           {thinkingExpanded && (

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

@@ -101,12 +101,12 @@ describe('TrajectoryTable', () => {
     render(<TrajectoryTable turns={turns} {...FOLD_PROPS} />)
 
     fireEvent.click(screen.getByRole('row', { name: /ASSISTANT/ }))
-    const toggle = screen.getByRole('button', { name: 'Show thinking' })
+    const toggle = screen.getByRole('button', { name: 'Thinking' })
     expect(toggle.getAttribute('aria-expanded')).toBe('false')
     expect(screen.queryByText(thinking)).toBeNull()
 
     fireEvent.click(toggle)
-    expect(screen.getByRole('button', { name: 'Hide thinking' })).toBe(toggle)
+    expect(screen.getByRole('button', { name: 'Thinking' })).toBe(toggle)
     expect(toggle.getAttribute('aria-expanded')).toBe('true')
     expect(toggle.parentElement?.textContent?.length).toBeGreaterThan(thinking.length)
   })