Tauri v2's Linux backend hard-depends on GTK3 + webkit2gtk-4.1; GTK4
support is tracked upstream (tauri#7335, tao#1104, wry#1228) but
unmerged with no ETA. Note this so it isn't re-investigated from
scratch later.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>