Stats got a real overhaul: tabs, charts, sortable tables

The Stats page used to be one long scroll. Now it's split into instant-switching tabs, with actual charts: a bar chart comparing match win rate to game win rate, a donut and bar for color-meta distribution, and a per-format breakdown on the player deep dive. The leaderboard is also a real sortable table now — click a column header to sort by it, with a name filter to quickly find someone in a big playgroup.