- The shell command processor was incorrectly truncating the first
character of the command (e.g., 'ls' became 's') due to an
erroneous `slice(1)` operation, likely introduced during a
previous merge. This change removes the slice, ensuring the full
command is processed.
- Introduces unit tests for the shellCommandProcessor hook.
- Fixes a minor grammatical issue in the display of GEMINI.md file count.
- Implements a toggleable shell mode, removing the need to prefix every command with `!`.
- Users can now enter and exit shell mode by typing `!` as the first character in an empty input prompt.
- The input prompt visually indicates active shell mode with a distinct color and `! ` prefix.
- Shell command history items (`user_shell`) are now visually differentiated from regular user messages.
- This provides a cleaner and more streamlined user experience for frequent shell interactions.
Fixes https://b.corp.google.com/issues/418509745
