OpenShell v0.1.70

Windows x64 安装版与便携版；未经代码签名。

What's Changed

• refactor: 清理分屏旧接口、无用导入与历史 CSS，完善死代码扫描 by @hctty27 in #81
• refactor(settings): 将通用、连接与终端设置拆为独立组件 by @hctty27 in #82
• refactor(workspace): 抽离终端拖拽分屏状态为独立 Hook by @hctty27 in #83
• refactor(css): 按模块拆分全局样式，保留原有层叠顺序 by @hctty27 in #84
• refactor(ssh): 提取自动重连生命周期为独立 Hook by @hctty27 in #85
• refactor(ai): 将自动执行事件与流式消息处理抽成 Hook by @hctty27 in #86
• release: OpenShell v0.1.70 by @hctty27 in #87

Full Changelog: v0.1.69...v0.1.70