The composer refactor changed the agent-mode button's accessibility label from the raw mode id ("load-test") to the formatted label ("Load test"). The user-facing change is intentional. Bring the test in line with the new label.
* Add slash commands for ending agents * Stabilize slash command e2e submit * Unslop client slash command draft setup * Fix slash commands while agent is running * Fix slash command submit race * Reshape client slash command execution * Fix slash command tab cleanup