Bug fixLeaderboard display and interaction fixes
Winrate and net winnings no longer contradict each other, and accidental swipes are prevented.
On the Fast Fold leaderboard, winrate, net winnings, and hand counts could appear mutually inconsistent; their calculation bases are now unified.
We also fixed sideways swipes accidentally jumping to the AI chat while the leaderboard was open, and overlapping panels on the lesson screen locking up the UI.