Fix Current Games showing waiting games

Changed filter from 'status != completed' to 'status === active'.
This prevents games waiting for players from appearing in Current Games.

Co-Authored-By: Claude Sonnet 4.5 <[e-mail]>

src/routes/+page.svelte

···
   // Split games by status
   const currentGames = $derived(
     (data.games || [])
-      .filter((g) => g.status != 'completed')
+      .filter((g) => g.status === 'active')
       .filter((g) => !showMyGamesOnly || isMyGame(g))
       .filter((g) => !showMyTurnOnly || isMyTurn(g))
       .sort((a, b) => new Date(b.updated_at).getTime() - new Date(a.updated_at).getTime())