[BUG] Claude Code freezes when Terminal.app menu bar / toolbar is activated (macOS)

Bug Description

Claude Code completely freezes when macOS Terminal.app's menu bar or toolbar is activated during a session. The TUI becomes unresponsive and requires force-killing the process.

Steps to Reproduce

1. Run Claude Code in macOS Terminal.app
2. During a session (especially while a tool is executing or output is being rendered), do one of the following:

• Click "Shell" menu → attempt to open a new tab
• Accidentally activate the toolbar

1. Claude Code freezes immediately — the tool execution display remains on screen, no input is accepted

Expected Behavior

Menu bar / toolbar interactions should not affect the Claude Code TUI session.

Actual Behavior

• The terminal becomes completely unresponsive
• Ctrl+C does not work
• The only recovery is force-quitting the terminal or kill -9
• This happens consistently, not intermittently

Environment

• Claude Code: v2.1.72
• Model: Opus 4.6 (Claude Max)
• OS: macOS (Darwin 24.5.0, Apple Silicon)
• Terminal: macOS Terminal.app (default)
• Shell: zsh

Screenshot

The screenshot below shows the frozen state after clicking the Shell menu. The previous session's tool output is stuck on screen.

Note: I have not tested whether this reproduces in iTerm2 or other terminal emulators. This may be specific to Terminal.app's interaction with ink/React-based TUI rendering.

Possibly Related

• #20547 (tool execution completes but never returns to prompt)
• #24478 (SIGKILL required)
• #25286 (100% write ratio in terminal renderer)