gpui: Fix `RefCell already borrowed` in `WindowsPlatform::run` (#42440)

Fixes ZED-1VX

Release Notes:

- N/A *or* Added/Fixed/Improved ...
b8fcd3ea04Lukas Wirth committed on 11/11/2025, 1:43:06 PM· committed by GitHubparent9be5e31
3 files changedLine totals unavailable