Long text is not scrolling inside the input

[OBats]

Describe the bug

When the textarea contains enough content to overflow, scrolling with the mouse wheel/trackpad does not scroll inside the textarea. Instead, the outer chat view/page scrolls, which makes editing longer prompts difficult.

Affected version

1.0.63

Steps to reproduce the behavior

1. Open GitHub Copilot CLI chat.
2. Type or paste enough text into the textarea so that the input area becomes scrollable.
3. Move the cursor over the textarea.
4. Try to scroll with the mouse wheel or trackpad.

Expected behavior

The textarea should capture the scroll event and scroll its own content while the pointer is focused/hovering over it.

Additional context

OS: MacOS 15.7.7
Terminal emulator: Terminal
Shell: zsh