Fix Game Queue row overflow in category group containers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/frontend/src/components/questionbank/GameSetupView.tsx

@@ -975,7 +975,7 @@ export default function GameSetupView() {
 											let runningIndex = 0;
 											return groupedQueue.map(
 												(group, gi) => (
-													<div key={group.category}>
+													<div key={group.category} className="min-w-0 overflow-hidden">
 														{/* Category header */}
 														<div className="flex items-center gap-1 px-1 py-1.5">
 															<span className="flex-1 text-xs font-semibold text-muted-foreground">