Input method can't use up/down arrow to select as those keys are used by Copilot

[owenzhao]

Describe the bug

on macOS up/down arrow are used to select character in Input method. However, it is also used by Copilot to switch between prompts.

Versions

• Copilot for Xcode: 0.44.148
• Xcode: 26.1 rc
• macOS: 26.0.1

Steps to reproduce
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Screenshots

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Additional context