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/app/(site)/photos/page.tsx

@@ -5,6 +5,7 @@ import {
 	PhotoLightbox,
 } from "@/components/public/photo-lightbox";
 import { ContentCard, EmptyState } from "@/components/public/ui";
+import { cached } from "@/lib/cache";
 import { CameraWeb, db } from "@/lib/db";
 import { formatDate } from "@/lib/format-date";
 
@@ -23,11 +24,9 @@ export default async function PhotosPage() {
 
 	let photos: Photo[] = [];
 	try {
-		photos = await db
-			.select()
-			.from(CameraWeb)
-			.orderBy(desc(CameraWeb.timestamp))
-			.limit(48);
+		photos = await cached("photos:grid", 60_000, async () =>
+			db.select().from(CameraWeb).orderBy(desc(CameraWeb.timestamp)).limit(48),
+		);
 	} catch {
 		photos = [];
 	}