Input text not visible in terminal during long conversations

Description

After a long conversation (many tool calls, large context), the typed text in the input prompt becomes invisible. Messages still submit correctly via Enter, but the input line is not rendered in the terminal.

Steps to Reproduce

1. Start a Claude Code session
2. Have a long conversation with many tool calls (git operations, file reads/writes, builds, etc.)
3. After ~30+ turns, the input prompt text becomes invisible
4. Typing still works — pressing Enter submits the message and Claude responds correctly
5. But the user cannot see what they are typing

Expected Behavior

Input text should remain visible regardless of conversation length.

Environment

• OS: macOS (Darwin 25.2.0)
• Terminal: Standard macOS terminal
• Claude Code version: Latest