Sync main_page.py from kosmonautical/openhands-index-paul

Hide incomplete entries from home page charts by default

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

Add 'Mark systems by' selector for scatter plot icons (Company/Openness/Country)

Fix logo glow and change Size chart to use total parameters

Connect 'Show only open models' checkbox to Winners and Evolution sections

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

Add Winners by Category section to main page

Add Evolution Over Time and Open Model Accuracy by Size visualizations

UI cleanup and About page updates

Remove Test Set/Validation Set tabs, keep single results view

Replace all AstaBench references with OpenHands Index

Revert homepage simplification - keep original design

Optimize app loading: simplify home page to avoid expensive data loading at startup

Initial OpenHands Index leaderboard based on ASTA Bench