Qt: Fix HiDPI handling on X11/Windows#30399

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QuLogic wants to merge 2 commits intomatplotlib:mainfrom

QuLogic:fix-qt-x-hidpi

Commits on Aug 6, 2025

Qt: Fix HiDPI handling on X11/Windows
QuLogic
committed

Commits on Aug 7, 2025

TST: Simplify Qt pixel ratio test and ensure it tests initial scale
QuLogic
committed