eframe's default wgpu instance enables PRIMARY | GL on Windows. Creating
the OpenGL backend can crash inside AMD's atio6axx.dll before the window
appears, so the app exits silently at launch. When WGPU_BACKEND is not
set, the Windows instance now enables only DirectX 12; an explicit
WGPU_BACKEND is still honoured. macOS, Linux and web are unchanged.
Same fix as storytold/designcraft#168 and storytold/filmcraft#179.
Claude-Session: https://claude.ai/code/session_01LyVbT6Vv4BwWZ4hY8973qD
Co-authored-by: Claude Opus 5.5 <[email protected]>