fix: mobile responsiveness for all admin pages

- DataTable: overflow-x-auto on table wrapper (affects users, rooms, tickets)
- Radio: overflow-x-auto wrappers around all 3 tables (shouts, applications, schedules)
- Catalog items: responsive grids (grid-cols-1 sm:grid-cols-3) in Add/Edit dialogs
- Catalog tabs: TabsList overflow-x-auto for narrow screens
- Import clone: pagination flex-wrap to prevent overlap on small screens

src/components/admin/data-table.tsx

@@ -414,7 +414,7 @@ export function DataTable<T extends { id: number | string }>({
 			</div>
 
 			{/* Table */}
-			<div className="rounded-md border">
+			<div className="rounded-md border overflow-x-auto">
 				<Table>
 					<TableHeader>
 						<TableRow>