NumLock-off numpad navigation and Delete are ignored #5171

Describe the bug

Regression: NumLock-off numpad navigation and Delete are ignored
CLI version: GitHub Copilot CLI 1.0.98
Windows Terminal Version: 1.25.2733.0

On Windows 11 Enterprise (x64), with NumLock OFF on laptop:

• Numpad 4/8/6/2 do not navigate the Copilot prompt cursor.
• Numpad decimal/Delete does not delete text.
• Dedicated arrow keys work in Copilot.
• Numpad navigation works in PowerShell 7 in the same terminal.
• The problem persists after updating and restarting Copilot.
• These keys previously worked in Copilot.

Expected: NumLock-off numpad keys behave like the corresponding
dedicated navigation and Delete keys.

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Affected version

No response

Steps to reproduce the behavior

No response

Expected behavior

Numpad 4/8/6/2 should navigate the Copilot prompt cursor.
Numpad decimal/Delete should delete text.

Additional context

No response