feat(native-chat): step between a question card's questions with Left and Right (#38335)

On a multi-question card only a click on a step tab changed question.
Left and Right now step to the previous or next question while an
option row or a step tab has focus, keep every answer, and stop at the
first and last question. Inside the answer field they still move the
caret.

Co-authored-by: Michael Schaecher <276865230+big-sheq@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

src/renderer/src/components/native-chat/NativeChatQuestionCard.test.tsx

@@ -304,6 +304,34 @@ describe('NativeChatQuestionCard', () => {
     ])
   })
 
+  it('moves between questions with Left and Right from an option or step tab, stopping at the ends', () => {
+    vi.useFakeTimers()
+    container.setAttribute('data-native-chat-root', 'true')
+    render(indentThenFruits, vi.fn(), true, true)
+    clickOption('Spaces')
+
+    expect(pressKey({ key: 'ArrowLeft' }, document.activeElement!).defaultPrevented).toBe(false)
+    expect(cardTitle()).toBe('Do you prefer tabs or spaces?')
+    expect(pressKey({ key: 'ArrowRight' }, document.activeElement!).defaultPrevented).toBe(true)
+    expect(cardTitle()).toBe('Which fruit?')
+    expect(document.activeElement?.textContent).toContain('Apple')
+    expect(pressKey({ key: 'ArrowRight' }, document.activeElement!).defaultPrevented).toBe(false)
+    expect(cardTitle()).toBe('Which fruit?')
+
+    const cancel = container.querySelector<HTMLButtonElement>('button[aria-label="Cancel"]')!
+    act(() => cancel.focus())
+    expect(pressKey({ key: 'ArrowLeft' }, cancel).defaultPrevented).toBe(false)
+    expect(cardTitle()).toBe('Which fruit?')
+
+    const stepTab = [...container.querySelectorAll('button')].find((b) =>
+      b.textContent?.includes('Step 1')
+    )!
+    act(() => stepTab.focus())
+    expect(pressKey({ key: 'ArrowLeft' }, stepTab).defaultPrevented).toBe(true)
+    expect(cardTitle()).toBe('Do you prefer tabs or spaces?')
+    expect(optionPressed('Spaces')).toBe('true')
+  })
+
   it('sends nothing when the question is cancelled before the pick moves on', () => {
     vi.useFakeTimers()
     const onAnswer = vi.fn()

src/renderer/src/components/native-chat/NativeChatQuestionCard.tsx

@@ -166,7 +166,6 @@ export function NativeChatQuestionCard({
       autoAdvance.schedule(() => advanceOrSubmit(next, otherText))
     }
   }
-  useNativeChatQuestionKeys(cardRef, shouldFocus && !isSubmitting, q.options.length, pickOption)
 
   const confirm = (fromKeyboard = false): void => {
     autoAdvance.cancel()
@@ -184,6 +183,20 @@ export function NativeChatQuestionCard({
     autoAdvance.cancel()
     setIndex(questionIndex)
   }
+  useNativeChatQuestionKeys(
+    cardRef,
+    shouldFocus && !isSubmitting,
+    q.options.length,
+    pickOption,
+    (delta) => {
+      const next = index + delta
+      if (next < 0 || next >= total) {
+        return false
+      }
+      goTo(next)
+      return true
+    }
+  )
   const cancel = (): void => {
     autoAdvance.cancel()
     onCancel()
@@ -226,6 +239,7 @@ export function NativeChatQuestionCard({
               <button
                 key={i}
                 type="button"
+                data-native-chat-question-step
                 disabled={isSubmitting}
                 onClick={() => goTo(i)}
                 className={cn(

src/renderer/src/components/native-chat/use-native-chat-question-keys.ts

@@ -7,7 +7,8 @@ export function useNativeChatQuestionKeys(
   cardRef: RefObject<HTMLElement | null>,
   enabled: boolean,
   optionCount: number,
-  onPick: (optionIndex: number) => void
+  onPick: (optionIndex: number) => void,
+  onStep: (delta: 1 | -1) => boolean
 ): void {
   const onKeyDown = useEffectEvent((event: KeyboardEvent): void => {
     const target = event.target instanceof Element ? event.target : null
@@ -72,6 +73,13 @@ export function useNativeChatQuestionKeys(
       if (field && next === field) {
         field.setSelectionRange(field.value.length, field.value.length)
       }
+    } else if (
+      (event.key === 'ArrowLeft' || event.key === 'ArrowRight') &&
+      (focusedIndex !== -1 || target?.closest('[data-native-chat-question-step]'))
+    ) {
+      if (onStep(event.key === 'ArrowRight' ? 1 : -1)) {
+        event.preventDefault()
+      }
     } else if (event.key === 'Enter' && focusedIndex !== -1) {
       event.preventDefault()
       onPick(focusedIndex)