SHIFT+Enter does not insert newline in Claude Code

Description

Pressing Shift+Enter in Claude Code does not insert a newline / line break in the input field. The expected behavior is to allow multi-line input without submitting the prompt.

Steps to reproduce

1. Open Claude Code
2. Start typing a message in the input prompt
3. Press Shift+Enter

Expected behavior

A newline is inserted in the input, allowing multi-line messages before submitting.

Actual behavior

Nothing happens, or the message is submitted (same as pressing Enter alone).

Environment

• OS: macOS
• Claude Code version: (please fill in)