fix(voice): recover empty failed lessons

pages/feedback/voice-state.ts

@@ -1,6 +1,7 @@
 import type { FeedbackSession, VoiceAudioSegment, VoiceLesson } from '../../utils/types'
 
 export type VoicePrimaryAction = 'save' | 'retry' | 'processing'
+export type VoiceLessonRecoveryAction = 'retry' | 'rerecord' | null
 
 export function getVoicePrimaryAction(session: FeedbackSession | null): VoicePrimaryAction {
   if (!session || session.lessonCount === 0) return 'save'
@@ -24,6 +25,15 @@ export function getFailedVoiceSegments(session: FeedbackSession): VoiceAudioSegm
   )
 }
 
+export function getVoiceLessonRecoveryAction(
+  lesson: VoiceLesson
+): VoiceLessonRecoveryAction {
+  if (lesson.status !== 'failed') return null
+  return lesson.segments.some((segment) => segment.status === 'failed')
+    ? 'retry'
+    : 'rerecord'
+}
+
 export function getVoiceLessonStatusText(lesson: VoiceLesson, isInDraft = false): string {
   if (lesson.status === 'failed') return '转录失败'
   if (lesson.status === 'recording') return '录音中'