[BUG] Resetting key bindings for cursor to new line

Environment

• Platform (select one):
• [x ] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.86
• Operating System: Mac Sequoia 15.6
• Terminal: PHPstorm Integrated Terminal

Bug Description

Last week the shift+enter cursor to new line key binding worked perfectly, now the only option is option+enter. We all know that is an awkward keystroke for any Mac user. Is this a regression in how the keybinding was set? Is there a way to reconfig that keybinding?

Steps to Reproduce

I used your Claude model to set and unset the keybinding and nothing worked.

Expected Behavior

Shift+enter should move the cursor to a new line, not submit the prompt

Actual Behavior

Additional Context