dsh-reminder: DSH Cross-Window Completion and Approval Reminder

dsh-reminder is a DSH web workflow plugin maintained by Aisland-SJL. When a task round ends or a tool call requires approval, it triggers a browser notification that pops up in any window, allowing users to return to the corresponding session with a click. The plugin supports approval completion toggles, auto-dismiss duration, and a brief notification sound, providing alerts without auto-approving actions. Installation is done via the command `dsh plugin --profile web add <dsh-reminder>`, requiring registration in the profile bundle followed by a restart of the web process, and notification permissions must be granted in the settings. Licensed under MIT, version 0.1.0.