fix(backend): 修复WebSocket和AI客户端关闭时的异常处理

feat(frontend): 添加markdown支持并改进AI聊天界面显示
refactor(backend): 优化定时任务参数处理和日志记录
style(frontend): 格式化代码和修复样式问题
chore(frontend): 添加markdown相关依赖

backend/app/api/v1/module_gencode/demo/schema.py

@@ -3,7 +3,6 @@
 from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 from fastapi import Query
 
-from app.core.base_params import BaseQueryParam
 from app.core.base_schema import BaseSchema, UserBySchema
 from app.core.validator import DateTimeStr