[FEATURE] Allow enter on a blank line to show that the program is running.

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

When I switch to a terminal, I hit enter to make sure it is live. Claude Code does not respond and feels like a hung program to me. Can you respond to enter in some simple way?

Proposed Solution

Add a blank line and reprompt.

Alternative Solutions

flicker, or say something.

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

Switch to claude, hit enter a few times, nothing happens.

Additional Context

_No response_