[BUG] OH GOD MAKE IT STOP FLASHING

Environment

• Platform (select one):
• [X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: <!-- output of claude --version -->
• Operating System: <!-- e.g. macOS 14.3, Windows 11, Ubuntu 22.04 -->
• Terminal: <!-- e.g. iTerm2, Terminal App -->

Bug Description

The UI loves to flash and causes the tism to flare up - please make this stop, you'll give someone a seizure

Steps to Reproduce

1. use Claude Code
2. Resize window once maybe
3. CONSTANT FLASHIES

Expected Behavior

The thing should just reformat, or NOT, it doesn't need magic terminal formatting logic - one can simply turn on or off word wrap as a terminal option

Actual Behavior

OMG THE FLASHING PLS