Terminal settings prevent either using @ symbol or multiline

OS: MacOS 14.4.1
Claude Code v1.0.35 directly in Terminal
Keyboard layout: German

Depending on the Terminal setting "Use Option as Meta key", I can

• either use the option key + Enter to enter a new line (instead of submitting the prompt), but then the @ symbol can't be typed using option+L
• or vice versa, can type @, but not multiline.

This makes Claude Code barely usable because it prevents either file references or complex prompts. It forces clumsy workarounds like writing prompts to external files or copy/pasting the @ symbol.

A possible solution would be to use Shift+Enter to submit the prompt or enter a new line.