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)/rares/page.tsx

@@ -16,9 +16,11 @@ type CategoryRow = {
 
 export default async function RareValuesPage() {
 	const t = await getTranslations("pages.rares");
-	let categories: CategoryRow[] = [];
-	try {
-		categories = await db
+
+	// Categories, per-category rare counts and site settings are all
+	// independent — run them concurrently instead of sequentially.
+	const [categoryRows, grouped, badgesBase] = await Promise.all([
+		db
 			.select({
 				id: WebsiteRareValueCategories.id,
 				name: WebsiteRareValueCategories.name,
@@ -29,29 +31,26 @@ export default async function RareValuesPage() {
 			.orderBy(
 				asc(WebsiteRareValueCategories.priority),
 				asc(WebsiteRareValueCategories.name),
-			);
-	} catch {
-		categories = [];
-	}
-
-	// Per-category rare counts (grouped so we avoid N queries).
-	const counts = new Map<string, number>();
-	try {
-		const grouped = await db
+			)
+			.catch((): CategoryRow[] => []),
+		db
 			.select({
 				categoryId: WebsiteRareValues.categoryId,
 				value: count(),
 			})
 			.from(WebsiteRareValues)
-			.groupBy(WebsiteRareValues.categoryId);
-		for (const g of grouped) {
-			counts.set(String(g.categoryId), Number(g.value));
-		}
-	} catch {
-		// leave counts empty -> shown as 0
-	}
+			.groupBy(WebsiteRareValues.categoryId)
+			.catch(() => []),
+		siteSettings.get("badges_path", ""),
+	]);
 
-	const badgesBase = (await siteSettings.get("badges_path", "")) ?? "";
+	const categories = categoryRows;
+
+	// Per-category rare counts (grouped so we avoid N queries).
+	const counts = new Map<string, number>();
+	for (const g of grouped) {
+		counts.set(String(g.categoryId), Number(g.value));
+	}
 
 	return (
 		<main style={{ display: "grid", gap: "1.5rem" }}>