Race Setup System - Configure individual racer start times for interval-start races Auto-generate with regular intervals Import from CSV with flexible time format parsing (Excel-friendly) Manual entry with inline editing Automatic elapsed time calculation and display Smart Start Time Adjustment - New modal interface for setting/adjusting race times "Start Race Now" option for immediate timing "Adjust Start Time" with numeric keypad input Intelligent interval preservation when adjusting configured racers Support for both mass-start and interval-start races Enhanced CSV Export - Separate exports for timestamp data and race setup configuration Timestamps include start times and elapsed times when racers configured Race setup export for backup and sharing configurations

Added the ability to input bib and start time for interval starts, which will display elapsed time from start to finish for each musher.