Sync UI from kosmonautical/openhands-index-paul with show_all_labels feature preserved

Refactor: Create generic create_scatter_chart() as single source of truth

Fix font consistency and remove code duplication in visualizations.py

Connect 'Mark systems by' selector to Evolution and Size charts

Consolidate font definitions into single source of truth

Clean up unused code, files, and assets

Show model names only for frontier points in Evolution chart

Use separate logos for light and dark mode in plots

Fix logo glow and change Size chart to use total parameters

Update 'Open Model Accuracy by Size' plot to match Cost/Performance style

Remove glow from OpenHands logo in dark mode plots

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