fix(voices): AI配音标识兼容旧素材，增加 tts_job_id 降级判断

旧素材 metadata 无 source 字段但有 tts_job_id，通过检查两者任一存在来显示 AI 标签

apps/api/app/api/routes/voices.py

@@ -687,13 +687,13 @@ def extract_voice_from_video(
         raise HTTPException(
             status_code=status.HTTP_504_GATEWAY_TIMEOUT,
             detail="视频处理超时，请尝试较短的视频",
-        )
+        ) from None
     except Exception as e:
         logger.exception("提取视频配音失败: %s", e)
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             detail="提取配音失败，请稍后重试",
-        )
+        ) from e
     finally:
         # 清理临时文件
         if tmp_dir and Path(tmp_dir).exists():
@@ -740,7 +740,7 @@ def _find_or_create_voice_library_for_extract(*, user_id, project_repository, as
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             detail="配音素材库创建失败",
-        )
+        ) from None
 
 
 def _get_audio_duration(audio_path: Path) -> float:

apps/web/src/pages/voices/components/MaterialVoiceTab.tsx

@@ -136,8 +136,9 @@ export const MaterialVoiceTab: React.FC<MaterialVoiceTabProps> = ({
             const material = mapAssetToMaterial(asset)
             // duration 优先取顶层（后端从 metadata 提取），兜底 metadata
             const cardDuration = asset.duration || material.duration || 0
-            // AI 生成素材标识（metadata.source === "tts_job"）
-            const isAiMaterial = (asset.metadata as Record<string, unknown>)?.source === "tts_job"
+            // AI 生成素材标识：兼容旧素材（无 source 字段但有 tts_job_id）
+            const meta = asset.metadata as Record<string, unknown>
+            const isAiMaterial = meta?.source === "tts_job" || !!meta?.tts_job_id
             const isPlaying = playingId === asset.id
             const isSelected = selectedIds.has(asset.id)
             // 播放中以 audio 真实时长为准，未播放显示卡片时长