Escape key to interrupt response not working in some sessions

Description

The Escape key to interrupt Claude's response does not work consistently across sessions. The UI shows "Esc to interrupt" during the thinking/response phase, but pressing Escape has no effect in some sessions while working correctly in others.

Steps to Reproduce

1. Start a Claude Code session
2. Ask Claude a question that triggers a lengthy response
3. While Claude is responding (thinking indicator shows "Esc to interrupt"), press Escape
4. Expected: Response stops immediately
5. Actual: In some sessions, nothing happens - Escape is ignored

Environment

• Platform: macOS (Darwin 25.1.0)
• The issue appears session-specific - Escape works in some threads but not others within the same terminal

Workaround

Using Ctrl+C successfully interrupts the response, but this is inconsistent with the UI hint showing "Esc to interrupt".

Additional Context

User reported that double-Escape (for rewind) also did not trigger, suggesting Escape key events may not be reaching Claude Code in affected sessions.

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