Resolve percentage border radii at paint time

crates/obscura-render/src/dom.rs

@@ -4998,7 +4998,7 @@ fn pseudo_requires_generated_box(style: &crate::LayoutStyle, content: Option<&st
         || style.background_image.is_some()
         || style.mask_image.is_some()
         || style.box_shadow.is_some()
-        || style.border_radius > 0.0
+        || !style.border_radius.is_zero()
         || style.overflow_hidden
         || style.transform_translate.is_some()
         || style.transform_scale.is_some()