The underscore character is not being rendered in the MCP environment variable input field

[codepinto]

Describe the bug

The underscore character (_) is not being rendered in the environment variable input field. When an underscore is typed or pasted into the field, it incorrectly appears as a space. This prevents the correct setting of environment variables that require an underscore, such as ANDROID_HOME.

Configuration

• OS: Microsoft Windows 11 Home (Version 10.0.26100 Build 26100) using Ubuntu in WSL

To Reproduce

Steps to reproduce the behavior:

1. Navigate to the section for adding or editing environment variables.
2. In the variable name or value input field, attempt to type the underscore character (_).
3. Alternatively, copy an underscore character from another source and paste it into the input field.
4. Observe that the underscore character is displayed as a space instead of _.

Expected behavior

The underscore character (_) should be correctly displayed in the input field when typed or pasted. This would allow for the proper definition of environment variables that conventionally use underscores, like ANDROID_HOME.

Screenshots

The screenshot below demonstrates the issue where ANDROID_HOME is incorrectly displayed as ANDROID HOME because the underscore character fails to render.