[feedback] make left / right navigation for subagents more clear

https://github.com/user-attachments/assets/89e6f475-a9b9-4bb4-80a7-d2be2963dd0d

Probably a skill issue on my part but I go to press `ctrl + left arrow` with the current instructions which isn't the right keybind