加入类型转换逻辑，防止解码失败

admin/dashboard/blueprints/message_push.py

@@ -407,7 +407,10 @@ def api_preview_task(task_id):
 
                 # 发送语音消息
                 if task.get('content_voice'):
-                    send_message_in_thread(server.client.send_voice_message, recipient, Path(task['content_voice']))
+                    voice_path = Path(task['content_voice'])
+                    # 根据文件扩展名确定类型
+                    voice_type = 'wav' if voice_path.suffix.lower() == '.wav' else 'mp3'
+                    send_message_in_thread(server.client.send_voice_message, recipient, voice_path, voice_type)
 
                 # 发送视频消息
                 if task.get('content_video'):
@@ -538,10 +541,12 @@ def upload_file():
         file_type = 'video'
 
     if file and allowed_file(file.filename, file_type):
-        # 生成安全的文件名
-        filename = secure_filename(file.filename)
-        # 生成唯一文件名
-        unique_filename = f"{uuid.uuid4().hex}_{filename}"
+        # 获取原始文件名和扩展名
+        original_filename = secure_filename(file.filename)
+        file_ext = original_filename.rsplit('.', 1)[1].lower()
+        
+        # 生成唯一文件名，保持原始扩展名
+        unique_filename = f"{uuid.uuid4().hex}.{file_ext}"
 
         # 确保上传目录存在
         upload_folder = os.path.join(current_app.root_path, 'static', 'uploads')