Don't display chat window in full screen mode

[gonefish]

Can't display the chat window when Xcode enters full screen mode.

Versions

• Copilot for Xcode: 0.32.0
• Xcode: 16.2
• macOS: 15.3.2

Steps to reproduce

1. Tap full screen button in Xcode.
2. Open copilot chat.

[rubalhossain]

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