DSH session completion notifier: appends a plugin system message to the session log on turn/end and pushes browser notifications (Web Notification + toast) with custom per-reason image/icon/alert-sound, plus a fully customizable official settings panel (p

Enables a single owner to use private Slack app credentials with a self-hosted Streamable HTTP MCP server to read allowlisted public channel messages, inspect thread context, send event-scoped replies, and notify the owner.