Leaderboard data fixes
Player run cards (gear, time, appearance) now repair themselves automatically when you open the leaderboard, using your local save as the source. If your run ever showed missing gear or "0:05" instead of your real time, it will self-correct next time you open the leaderboard, as long as your local runs haven't been wiped.
A safeguard prevents empty/wiped local data from ever being pushed to the server, the repair only fires if your local save actually has real gear or a real run time recorded.
Fixed a race condition where two sidecars could be uploaded simultaneously for the same run, with the worse one winning and overwriting your correct data permanently.
Fixed a bug where downloaded leaderboard data from Steam could overwrite already-correct run data on your screen.

Duplicate crown notification fixed
Fixed a bug where the daily crown achievement notification ("you placed in the top 10!") would keep re-appearing every session even after you'd already seen it. It was caused by two separate issues: stale Steam stat values rolling the "last seen" counter backwards, and the notification surviving in Steam Cloud even after it was dismissed.