Gateway slash command responses were silently dropped — use-socket.ts had no handlers for command:result or system:reload. Added both: - command:result → renders success/error as a system message - system:reload → updates command registry manifest + shows reload message Also removes stray @testing-library/react devDependency that was never used in the CLI package. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>