Desktop close shortcuts follow page focus
Desktop 关闭快捷键跟随页面焦点
The [shortcut PRD](https://trtgsjkv6r.feishu.cn/wiki/APvtwgbztiBLzvk9DM4cQbccnhf) gives the close command two targets: the focused right-sidebar page, or the Desktop window when no page can close. Electron's native close role bypasses the page owner. On Windows, closing the last window also quits the Desktop instance and stops its Host tasks, so this fallback is a lifecycle choice rather than a menu-label change.
English
Problem
The shortcut PRD gives the close command two targets: the focused right-sidebar page, or the Desktop window when no page can close. Electron's native close role bypasses the page owner. On Windows, closing the last window also quits the Desktop instance and stops its Host tasks, so this fallback is a lifecycle choice rather than a menu-label change.
Decision
The sidebar page owner resolves close against live focus and captures the target's Session, pane, tab occurrence, and navigation revision. It closes that page through its resource cleanup handler, or collapses the sole docked guide. Stale sidebar targets do not fall back to another page or the window. Without a closeable page, Desktop requests native window closure; Web has no window fallback.
The macOS File menu routes Close Page or Window through the same owner and displays the accepted single-key binding. Native closure requires the current configuration revision, a focused and enabled product window, and inactive shortcut recording. The existing window lifecycle applies without a shortcut-specific confirmation: macOS keeps the application alive after its last window closes; Windows and Linux quit and stop the Host.
This decision owns File-menu and close behavior; the Desktop reference documents native Window and application hide commands. Shortcut preference persistence owns accepted bindings and revision publication.
Alternatives considered
Use Electron's native close role. It closes the window without asking the focused page owner and cannot preserve page cleanup or the accepted custom binding's routing.
Disable the Windows window fallback. This avoids a task-stopping close shortcut but omits the PRD's explicit Desktop fallback. The product keeps native window-close semantics; users who need the application to remain running can minimize it.
Consequences
Close behaves consistently across the shortcut and macOS File menu. On Windows and Linux, pressing it outside a closeable sidebar page can stop active tasks by quitting the instance. The command does not add a background Host lifetime or a task-aware shutdown confirmation. Desktop keyboard tests cover revision and focus guards; sidebar focus tests cover captured page identity and stale targets; startup tests cover the platform menu declarations.
中文
问题
快捷键 PRD 为关闭命令规定了两类目标：获得焦点的右侧栏页面，或没有可关闭页面时的 Desktop 窗口。Electron 原生 close role 绕过页面 owner。Windows 关闭最后一个窗口还会退出 Desktop 实例并停止其 Host 任务，因此该回退属于生命周期选择，不只是菜单标签变更。
决策
侧栏页面 owner 根据实时焦点解析关闭操作，并捕获目标的 Session、窗格、tab occurrence 和导航 revision。它通过资源清理处理器关闭该页面，或收起唯一的停靠引导页。过期侧栏目标不会回退到其他页面或窗口。没有可关闭页面时，Desktop 请求原生窗口关闭；Web 没有窗口回退。
macOS File 菜单通过同一个 owner 路由“关闭页面或窗口”，并显示已接受的单键绑定。原生关闭要求配置 revision 仍为当前值、产品窗口已聚焦且启用，并且没有在录制快捷键。现有窗口生命周期直接生效，不增加快捷键专用确认：macOS 最后一个窗口关闭后保留应用；Windows 和 Linux 退出并停止 Host。
本决策负责 File 菜单与关闭行为；Desktop 参考说明原生 Window 与应用隐藏命令。快捷键偏好持久化负责已接受绑定及 revision 发布。
考虑过的替代方案
使用 Electron 原生 close role。 它不询问获得焦点的页面 owner 就关闭窗口，无法保留页面清理和已接受自定义绑定的路由。
禁用 Windows 窗口回退。 这能避免关闭快捷键停止任务，但会遗漏 PRD 明确要求的 Desktop 回退。产品保留原生关窗语义；需要应用继续运行时，用户可以最小化窗口。
影响
快捷键与 macOS File 菜单的关闭行为一致。在 Windows 和 Linux 上，焦点不在可关闭侧栏页面时按下该快捷键，可能因退出实例而停止活动任务。该命令不增加后台 Host 生命周期或感知任务状态的退出确认。Desktop 键盘测试覆盖 revision 和焦点保护；侧栏焦点测试覆盖捕获的页面身份和过期目标；启动测试覆盖各平台菜单声明。