Fix Evolution Over Time chart

Fix Pareto frontier in Evolution Over Time chart

Adjust chart branding: move logo down, increase URL font size

Add OpenHands logo and URL branding to charts

Make fonts consistent with Outfit across tables and charts

Align color scheme with OpenHands brand

Update visualization styling to match existing charts

Fix column name handling in visualizations for release_date and parameter_count

Add Evolution Over Time and Open Model Accuracy by Size visualizations