Admin review and standings still use a 5x5 card after card-size generalization

[YoyoJesus]

Problem

The player card calculates cardSize from effectivePoolSize(tiles) and passes it to shuffleTilesForUser and detectBingo. The admin review page and loadStandings do not: both call the functions with their 5x5 defaults. The admin Svelte view also hard-codes GRID_SIZE.

Reproduction

1. Configure at least 49 effective tiles, so the player card becomes 7x7.
2. Have a player complete a row on the displayed 7x7 card.
3. Open that player in /admin/users/:id, or view the leaderboard.

The player sees a bingo, but the admin and standings calculation only evaluates a 5x5 subset and can report no bingo, blocking verification. The leaderboard also advertises a 24-tile maximum even for larger cards.

Suggested fix

Compute the effective pool size and card size once in each consumer (or centralize board-state construction), then pass that size through shuffleTilesForUser, detectBingo, and the admin grid and leaderboard maximum.

Affected code

• src/routes/admin/users/[id]/+page.server.ts
• src/routes/admin/users/[id]/+page.svelte
• src/lib/server/standings.ts
• src/routes/leaderboard/+page.server.ts
• src/routes/bingo/+page.server.ts (the correct reference implementation)