[BUG] Option+Enter does not enable multi-line messages (macOS)

"Press Option+Enter to send a multi-line message" doesn't work.

Environment

• Claude CLI version: 1.0.24 (Claude Code)
• Operating System: macOS Sequoia 15.4.1 (24E263)
• Terminal: Terminal (the built-in macOS app)

Bug Description

Claude Code says " ※ Tip: Press Option+Enter to send a multi-line message", but option+enter works exactly like enter does, sending the current message.

Steps to Reproduce

1. Write something
2. Press option+enter

Expected Behavior

It says " ※ Tip: Press Option+Enter to send a multi-line message" right above, so that's what I expected to happen.

Actual Behavior

As if enter was pressed.

Additional Context

I'm using zsh and Terminal, both the built-in macOS versions.