CLI crashes on startup when ran inside a Git repository and MacOS seatbelt is enabled

### What happened?

Running Gemini CLI with MacOS seatbelt enabled:

```
"tools": {
"sandbox": true
},
```

And then starting Gemini CLI in a folder that contains a Git repository instantly crashes the CLI.

Folder without a Git repository:

Initialising this folder with a Git repo:

### What did you expect to happen?

Not to crash.

### Client information

Client Information

Run `gemini` to enter the interactive CLI, then run the `/about` command.

```console
> /about
╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ │
│ About Gemini CLI │
│ │
│ CLI Version 0.53.0 │
│ Git Commit decc0b46c │
│ Model Auto │
│ Sandbox sandbox-exec (permissive-open) │
│ OS darwin │
│ Auth Method Signed in with Google () │
│ Tier Gemini Code Assist Standard │
│ GCP Project │
│ │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

```

### Login information

Signed with OAuth using a Gemini Code Assist standard License.

`GOOGLE_CLOUD_PROJECT` Environment variable is set.

### Anything else we need to know?

_No response_

Reproduce the crash by enabling "tools": { "sandbox": true } and starting Gemini CLI inside a Git repository on macOS; compare it with a folder without a repository. Start from CLI startup and the `/about` environment details, then verify that startup completes normally under the same sandbox setting and Git context.

Written by the indexing model from the issue text.