CLI skips 'a' on all commands on both vscode and terminal

### Describe the bug

Every time on MacOS i try to run a Github CLI session it hits a bug where it cannot parse the 'a' character and skips in each command.

e.g. runs `git add file/abc123` -> `git dd file/abc123`

### Affected version

1.0.39

### Steps to reproduce the behavior

1. I open CLI on terminal or vscode chat
2. It responds and runs any bash command with an 'a'
3. The command gets incomplete because 'a' is getting skipped/stripped
4. command fails

### Expected behavior

It should be able to seamlessly type any command without the 'a' getting stripped?

### Additional context

- iTerm2
- Bash / zsh
- MacOS Sequoia 15.7.5
- CLI version 1.0.39

Start by reproducing the issue in the CLI through both a terminal and the VS Code chat integration, using Bash and zsh on macOS Sequoia 15.7.5 with version 1.0.39. Compare commands containing the letter “a” with their executed forms and trace the CLI path that handles command input. Done means commands retain every character and execute correctly in both environments.

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