fix: 声音克隆暴露原始错误 + 脚本生成去掉中间进度提示

- voice.py: 异常处理不再吞掉原始错误，直接暴露具体原因
- vidu_service.py: clone_voice 错误消息包含 Vidu 返回的 error_message
- ScriptCreation.tsx: 去掉一闪而过的'任务已创建，等待执行...'中间状态

python-api/app/api/v1/voice.py

@@ -399,9 +399,12 @@ async def submit_clone_task(
 
     except PlatformError:
         raise
+    except ValueError as e:
+        logger.error(f"[Voice] 提交克隆任务失败: {e}")
+        raise HTTPException(status_code=500, detail=f"参数错误: {e}")
     except Exception as e:
         logger.error(f"[Voice] 提交克隆任务失败: {e}")
-        raise HTTPException(status_code=500, detail="任务提交失败，请稍后重试")
+        raise HTTPException(status_code=500, detail=f"任务提交失败: {e}")
 
 
 @router.get("/clone/query/{task_id}", response_model=ApiResponse[VoiceCloneTaskResponse])

python-api/app/services/vidu_service.py

@@ -201,7 +201,7 @@ class ViduService:
         if not result.success:
             logger.error(f"[Vidu Clone] 复刻失败: {result.error_message}")
             raise PlatformError(
-                "声音复刻失败，请稍后重试",
+                f"声音复刻失败: {result.error_message or '请稍后重试'}",
                 platform="vidu",
                 retryable=result.retryable,
                 error_type=PlatformErrorType.BAD_REQUEST,

tauri-app/src/pages/VideoCreation/ScriptCreation.tsx

@@ -143,7 +143,6 @@ export default function ScriptCreation() {
         duration: scriptDuration,
         style: 'default',
       });
-      progress.update('任务已创建，等待执行...');
 
       // 2. 轮询任务状态
       const result = await pollTask(taskId, (msg) => progress.update(msg));