TUI rendering: window resize causes output duplication, rewind causes freeze (requires process kill)

Environment

• Claude Code: 2.1.119
• macOS: 26.4.1 (Build 25E253)
• Terminals tested: iTerm2, Apple Terminal — both reproduce

Bug 1: Window resize causes output duplication

After a long session, resizing the terminal window causes previously rendered output to repeat and overlap with the current viewport.

Steps to reproduce:

1. Run a long session with substantial output (multiple responses)
2. Resize the terminal window (narrower or wider)
3. Output from earlier in the session reappears, overlapping with the current view

Bug 2: Rewind causes complete freeze (process must be killed)

Using the rewind feature in a long session causes Claude Code to freeze entirely. Ctrl+C does not respond. The process must be force-quit externally.

Steps to reproduce:

1. Run a long session
2. Use rewind
3. Claude Code becomes unresponsive — Ctrl+C has no effect
4. Process must be killed via Activity Monitor or kill

Notes

• Both bugs are reproducible across different terminal emulators (iTerm2 and Apple Terminal), ruling out terminal-specific rendering issues
• Bug 2 requires full process termination to recover; no keyboard interrupt works