Summary

• Refactored virtualized text viewer to use React Query infinite scroll instead of custom range loading
• Merged line counting and reading into single backend function for efficiency
• Simplified buffering logic by removing complex pre-rendering and buffer management
• Increased virtualization thresholds and chunk sizes for better performance
• Consolidated state management and removed redundant ref-based tracking

This refactoring significantly reduces code complexity while improving performance and memory efficiency for large file viewing.