v1.0.13 - Full functionality release:
- Contest-wise performance analytics with average & median solve times
- WA% friction analysis to identify weak topics
- Time range filters (1 month, 3 months, 6 months, 1 year, 2 years, all time)
- Division filters (Div1, Div2, Div3, Div4, Other)
- Contest mode filters (Total, Rated, Unrated)
- Adaptive dark/light theme support matching Codeforces theme

Fixed critical packaging issues:
- Properly structured XPI with manifest.json at root level
- Resolved "corrupt add-on" installation error
- All files now correctly packaged with proper compression

Re-release to fix CDN caching issue. Resolved packaging problem that caused "add-on appears to be corrupt" installation errors.

Fixed installation issue caused by improper packaging. No functional changes - all features remain the same.