In Terminal.app on macos, mouse selection can't be copied with alt-screen - and the --no-alt-screen is remove in 1.0.12

[ArtemMelnikMorphisec]

Describe the bug

Terminal.app conflicts with alt-screen option in copilot CLI, as a result a mouse selection can't be copied (requires Fn key selection).
--no-alt-screen was a nice workaround, not everyone needs alt-screen, but now this option is also gone in 1.0.12.

Affected version

GitHub Copilot CLI 1.0.12.

Steps to reproduce the behavior

1. Run copilot in Terminal.app - it may be related to a copilot running in a terminal session on a macos VM as well.
2. Select a text with a mouse, copy it.
3. Paste it - the selected text isn't copied.
4. Select with Fn key pressed, copy.
5. Paste - selected text copied successfully.

Expected behavior

Mouse selection always should be copied regardless of the Fn key.

Additional context

MacOS 26.4 arm64