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)/polls/[id]/page.tsx

@@ -60,9 +60,11 @@ export default async function PollDetailPage({
 	const isOpen = poll.status === "active" && !hasEnded;
 
 	const questionIds = questions.map((q) => q.id);
-	const myVotes =
+
+	// My votes and the aggregate results are independent — load them together.
+	const [myVotes, allVotes] = await Promise.all([
 		Number.isInteger(userId) && userId > 0 && questionIds.length > 0
-			? await db
+			? db
 					.select()
 					.from(WebsitePollVote)
 					.where(
@@ -72,12 +74,9 @@ export default async function PollDetailPage({
 						),
 					)
 					.catch(() => [])
-			: [];
-	const hasVoted = myVotes.length > 0;
-
-	const allVotes =
+			: Promise.resolve([]),
 		poll.showResults === 1 && questionIds.length > 0
-			? await db
+			? db
 					.select({
 						questionId: WebsitePollVote.questionId,
 						answer: WebsitePollVote.answer,
@@ -85,7 +84,9 @@ export default async function PollDetailPage({
 					.from(WebsitePollVote)
 					.where(inArray(WebsitePollVote.questionId, questionIds))
 					.catch(() => [])
-			: [];
+			: Promise.resolve([]),
+	]);
+	const hasVoted = myVotes.length > 0;
 
 	const votesByQuestion = new Map<number, string[]>();
 	for (const vote of allVotes) {