fix: resolve biome lint warnings in admin page (useless fragment, non-null assertion)

apps/web/src/routes/admin/index.tsx

@@ -497,23 +497,17 @@ function AdminPage() {
 						label="Artiesten"
 						accent="amber"
 						value={performerCount}
-						sub={
-							<>
-								{stats?.byArtForm.slice(0, 3).map((item) => (
+						sub={stats?.byArtForm.slice(0, 3).map((item) => (
 							<div
 								key={item.artForm}
 								className="flex justify-between text-amber-300/60"
 							>
-										<span className="truncate">
-											{item.artForm || "Onbekend"}
-										</span>
+								<span className="truncate">{item.artForm || "Onbekend"}</span>
 								<span className="ml-2 shrink-0 font-mono text-amber-300">
 									{item.count}
 								</span>
 							</div>
 						))}
-							</>
-						}
 					/>
 					<StatCard
 						label="Bezoekers aanwezig"
@@ -1234,7 +1228,7 @@ function AdminPage() {
 						<button
 							type="button"
 							onClick={() =>
-								setPage((p) => Math.min(pagination!.totalPages, p + 1))
+								setPage((p) => Math.min(pagination?.totalPages ?? p, p + 1))
 							}
 							disabled={page === pagination.totalPages}
 							className="rounded-lg border border-white/15 bg-white/5 px-4 py-1.5 font-mono text-white/60 text-xs transition hover:border-white/30 hover:text-white disabled:opacity-30"