Tab key traps user in navigation - cannot return to edited text, Esc doesn't work

Description

Pressing Tab in chat input can trap the user in tab navigation. Once trapped, Esc doesn't work to return to the chat input, and the only way out is to close the entire chat tab. Ctrl+C only works intermittently.

Steps to Reproduce

1. Type some text in the chat input
2. Press Tab
3. Try to navigate back to the edited text with Esc → doesn't work
4. Try Ctrl+C → works only sometimes/rarely

Expected Behavior

• Tab should navigate between UI elements
• Esc should return focus to chat input or cancel the tab navigation
• Should be able to resume editing the text

Actual Behavior

• After pressing Tab, user is trapped in tab navigation
• Cannot escape back to the chat input with Esc
• Only workaround is closing the entire chat tab
• Ctrl+C works intermittently (unreliable)

Environment

• macOS (darwin)
• Claude Code latest version
• Reproducible on repeated Tab presses

Severity

High - users lose their edited text and have to close the tab

Additional Notes

Related to recent Claude Code update (same timeframe as keybindings newline bug #27865)