Add Export/Import Lap Data Feature #361
Description
Users should be able to export their lap times to CSV/JSON for analysis and import previously saved sessions. This would be valuable for athletes, productivity tracking, and data analysis.
Features to implement:
Export button that downloads lap data as CSV
Export button that downloads lap data as JSON
Import functionality to load previously exported sessions
Display export/import options in a clean modal or dropdown
Technical Details:
CSV format: Lap Number,Time,Difference
JSON format: Array of lap objects with timestamp, duration, difference
Include session metadata (date, total time, etc.)
Validate imported data format
Files to modify:
script.js - Add export/import functions
index.html - Add export/import buttons
style.css - Style the export/import UI