Fix two list-marker issues:

- Decimal/text markers now inherit the current list-item font color.
  - Marker X/Y coordinates are pixel-snapped, eliminating blurry rendering.
  - The behavior is shared by <li> and textual <summary> markers.
  - Added focused tests for inherited color and integer positioning.

include/eepp/ui/uihtmlliststyle.hpp

@@ -6,6 +6,10 @@
 #include <eepp/math/rect.hpp>
 #include <eepp/ui/csslayouttypes.hpp>
 
+namespace EE { namespace Graphics {
+class Text;
+}} // namespace EE::Graphics
+
 namespace EE { namespace UI {
 
 class EE_API UIHTMLListStyle {
@@ -16,6 +20,11 @@ class EE_API UIHTMLListStyle {
 
 	static String getTextMarkerString( CSSListStyleType type, int index );
 
+	static void syncTextMarkerColor( Graphics::Text& marker, const Color& color );
+
+	static Vector2f getTextMarkerPosition( const Vector2f& screenPos, const Rectf& paddingPx,
+										   Float textWidth, Float fontSize );
+
 	static void drawPrimitiveMarker( CSSListStyleType type, const Vector2f& screenPos,
 									 const Rectf& paddingPx,
 									 const Graphics::FontStyleConfig& style );