13th_fix combine download

app/api/files.py

@@ -606,4 +606,86 @@ def download_batch_files(job_uuid):
             success=False,
             error='SYSTEM_ERROR',
             message='批量下載失敗'
+        )), 500
+
+
+@files_bp.route('/<job_uuid>/download/combine', methods=['GET'])
+@jwt_login_required
+def download_combine_file(job_uuid):
+    """下載合併檔案"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得當前用戶
+        current_user_id = g.current_user_id
+        
+        # 查找任務
+        job = TranslationJob.query.filter_by(
+            job_uuid=job_uuid,
+            user_id=current_user_id
+        ).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查任務狀態
+        if job.status != 'COMPLETED':
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_COMPLETED',
+                message='任務尚未完成'
+            )), 400
+        
+        # 尋找 combine 檔案
+        combine_file = None
+        for file in job.files:
+            if file.filename.lower().find('combine') != -1 or file.file_type == 'combined':
+                combine_file = file
+                break
+        
+        if not combine_file:
+            return jsonify(create_response(
+                success=False,
+                error='COMBINE_FILE_NOT_FOUND',
+                message='找不到合併檔案'
+            )), 404
+        
+        # 檢查檔案是否存在
+        file_path = Path(combine_file.file_path)
+        if not file_path.exists():
+            return jsonify(create_response(
+                success=False,
+                error='FILE_NOT_FOUND',
+                message='合併檔案已被刪除'
+            )), 404
+        
+        logger.info(f"Combine file downloaded: {job.job_uuid} - {combine_file.filename}")
+        
+        # 發送檔案
+        return send_file(
+            str(file_path),
+            as_attachment=True,
+            download_name=combine_file.filename,
+            mimetype='application/octet-stream'
+        )
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Combine file download error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='合併檔案下載失敗'
         )), 500