[Feature Request]: 重写导出弹窗

[Yu-Core]

Is your feature request related to a problem? Please describe. 重写导出弹窗，使用全屏弹窗，增加导出范围，txt格式增加合并分开选项

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.