[FEATURE] In the Claude Code CLI allow the user to use Shift-Enter for multi line input.

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Lot of users use Shift-Enter to split lines in all kinds of applications.
I sometimes press Shift-Enter by habit in Claude Code CLI and I am probably not the only one.

Proposed Solution

It would be very helpful if the user could use Shift-Enter in Claude Code CLI to write a multi line sentence just the same way as in endless applications, including Claude.AI/chat webpage.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_