[BUG] Terminal text blinking in IntelliJ IDEA integrated terminal

Description

Text in Claude Code interactive prompts (permission dialogs, option menus) blinks continuously in IntelliJ IDEA's integrated terminal.

Environment

• Claude Code version: 2.0.22 (current/latest)
• OS: Linux (kernel 6.8.0-85-generic)
• Terminal type: xterm-256color, truecolor support
• IDE: IntelliJ IDEA (integrated terminal)

Details

The blinking affects text in interactive prompts, such as:

• Permission dialog options
• Menu selections (e.g., "No, and tell Claude what to do differently")

Timeline

• Issue noticed after a recent Claude Code auto-update
• With ~3 patch versions per day, unable to pinpoint exact version that introduced the regression
• Issue is present in current version 2.0.22
• Did not occur in previous versions (likely within the last few days of updates)

Impact

The blinking makes the interface harder to read but functionality is not affected.

Steps to Reproduce

1. Open Claude Code in IntelliJ IDEA integrated terminal
2. Trigger any permission dialog or interactive prompt
3. Observe text blinking in the options list

Possible Related Issues

May be related to #1913 (Terminal Flickering) and #769 (screen flickering during in-progress calls)