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* Fix #378: draw on the GPU that drives the primary display on Windows The low-power preference picked the AMD Ryzen integrated GPU on a desktop whose monitors all hang off an NVIDIA card. Presenting from the headless iGPU to a window on another GPU took the AMD display driver down, blacking out every monitor for two minutes before PdfCraft exited. Windows now gets the display-aware adapter choice Linux already had: EnumDisplayDevices (through the safe `winsafe` crate, MIT) says which adapter drives each desktop display and which is primary; `pick_adapter` matches that to the wgpu adapters by PCI ids. The GPU driving the primary display wins, as the built-in panel does on Linux (#8). The log names the GPU chosen, the first question when a window stays black. Synthetic tests cover the Windows device-id parser and the primary-display rule; a live test checks the enumeration on the running machine. Verified on a Ryzen 7000 + RTX 3090 desktop: the app now starts on the 3090. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XBMGuLLMhs1h8orSxcJXER * 631: the winsafe feature comment says user (and kernel) --------- Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com> Co-authored-by: Brandon Thomas <echelon@gmail.com>