Add performance optimizations and component refactors

- Cache read-heavy public API routes via redisCache (leaderboard, values,
  shop, articles, photos, guilds, teams, staff, users, home, radio, badges)
- Add single-flight and bounded-memory cache layer with unit tests
- Parallelize independent DB queries on search, rares, shop, staff, polls
  and profile pages
- Push radio points leaderboard aggregation to SQL with a LIMIT
- Split studio-client and import-furni-client into focused modules
- Clean up next.config.ts

src/components/admin/studio/batch-progress.tsx

@@ -0,0 +1,71 @@
+"use client";
+
+import { Check, Loader2, X } from "lucide-react";
+
+import { cn } from "@/lib/utils";
+import type { BatchItemStatus } from "./studio-types";
+
+export function BatchProgress({
+	progress,
+	done,
+	succeeded,
+	failed,
+}: {
+	progress: Map<string, BatchItemStatus>;
+	done: boolean;
+	succeeded: number;
+	failed: number;
+}) {
+	const entries = [...progress.entries()];
+	return (
+		<div className="border-t border-[var(--admin-border)] p-3">
+			<div className="mb-2 flex items-center justify-between">
+				<span className="text-xs font-bold uppercase tracking-wider text-[var(--admin-text-muted)]">
+					Importing…
+				</span>
+				{done ? (
+					<span
+						className={cn(
+							"text-xs font-bold",
+							failed > 0
+								? "text-[var(--admin-warning)]"
+								: "text-[var(--admin-success)]",
+						)}
+					>
+						✓ {succeeded} ok{failed > 0 ? ` · ${failed} failed` : ""}
+					</span>
+				) : (
+					<Loader2
+						size={14}
+						className="animate-spin text-[var(--admin-accent)]"
+					/>
+				)}
+			</div>
+			<div className="max-h-44 space-y-1 overflow-y-auto pr-1">
+				{entries.map(([classname, s]) => (
+					<div key={classname} className="flex items-center gap-2 text-xs">
+						{s.status === "done" ? (
+							<Check
+								size={12}
+								className="shrink-0 text-[var(--admin-success)]"
+							/>
+						) : s.status === "failed" ? (
+							<X size={12} className="shrink-0 text-[var(--admin-warning)]" />
+						) : (
+							<Loader2
+								size={12}
+								className="shrink-0 animate-spin text-[var(--admin-accent)]"
+							/>
+						)}
+						<span className="min-w-0 flex-1 truncate font-mono">
+							{classname}
+						</span>
+						<span className="shrink-0 capitalize text-[var(--admin-text-muted)]">
+							{s.status.replace(/_/g, " ")}
+						</span>
+					</div>
+				))}
+			</div>
+		</div>
+	);
+}