feat(33-06): add market prices section to catalog detail page

- Add useGlobalItemPrices and useGlobalItemCommunityStats hooks
- Add MarketPricesSection component with user's market MSRP prominent
- Show community price stats per market with median and report count
- Collapsible "Other Markets" section (collapsed by default)
- Import useCurrency, useExchangeRates, formatPrice for market display

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/client/hooks/useGlobalItems.ts

@@ -67,6 +67,43 @@ export function useLinkItem() {
 	});
 }
 
+interface MarketPriceData {
+	id: number;
+	globalItemId: number;
+	market: string;
+	currency: string;
+	priceCents: number;
+	source: string | null;
+	createdAt: string;
+}
+
+interface CommunityPriceStat {
+	market: string;
+	currency: string;
+	medianPrice: number;
+	reportCount: number;
+}
+
+export function useGlobalItemPrices(globalItemId: number) {
+	return useQuery({
+		queryKey: ["global-item-prices", globalItemId],
+		queryFn: () =>
+			apiGet<{ marketPrices: MarketPriceData[] }>(
+				`/api/market-prices/global-items/${globalItemId}/prices`,
+			),
+		enabled: globalItemId > 0,
+	});
+}
+
+export function useGlobalItemCommunityStats(globalItemId: number) {
+	return useQuery({
+		queryKey: ["global-item-community-stats", globalItemId],
+		queryFn: () =>
+			apiGet<CommunityPriceStat[]>(`/api/community-prices/${globalItemId}`),
+		enabled: globalItemId > 0,
+	});
+}
+
 export function useUnlinkItem() {
 	const queryClient = useQueryClient();
 	return useMutation({

src/client/routes/global-items/$globalItemId.tsx

@@ -1,8 +1,16 @@
 import { createFileRoute, Link } from "@tanstack/react-router";
+import { useState } from "react";
 import { GearImage, imageContainerBg } from "../../components/GearImage";
 import { useAuth } from "../../hooks/useAuth";
+import { useCurrency } from "../../hooks/useCurrency";
+import { useExchangeRates } from "../../hooks/useExchangeRates";
 import { useFormatters } from "../../hooks/useFormatters";
-import { useGlobalItem } from "../../hooks/useGlobalItems";
+import {
+	useGlobalItem,
+	useGlobalItemCommunityStats,
+	useGlobalItemPrices,
+} from "../../hooks/useGlobalItems";
+import { formatPrice, type Currency } from "../../lib/formatters";
 import { LucideIcon } from "../../lib/iconData";
 import { useUIStore } from "../../stores/uiStore";
 
@@ -235,6 +243,9 @@ function GlobalItemDetail() {
 				</div>
 			)}
 
+			{/* Market Prices Section */}
+			<MarketPricesSection globalItemId={Number(globalItemId)} />
+
 			{/* Product page link */}
 			{item.sourceUrl && (
 				<div className="mt-4">
@@ -251,3 +262,99 @@ function GlobalItemDetail() {
 		</div>
 	);
 }
+
+function MarketPricesSection({
+	globalItemId,
+}: { globalItemId: number }) {
+	const { market: userMarket } = useCurrency();
+	const { price } = useFormatters();
+	const { data: pricesData } = useGlobalItemPrices(globalItemId);
+	const { data: communityStats } = useGlobalItemCommunityStats(globalItemId);
+	const [showOtherMarkets, setShowOtherMarkets] = useState(false);
+
+	const marketPrices = pricesData?.marketPrices ?? [];
+	const stats = communityStats ?? [];
+
+	// No data at all — don't render section
+	if (marketPrices.length === 0 && stats.length === 0) return null;
+
+	const userMarketPrice = marketPrices.find((p) => p.market === userMarket);
+	const otherMarketPrices = marketPrices.filter(
+		(p) => p.market !== userMarket,
+	);
+	const userMarketStats = stats.filter((s) => s.market === userMarket);
+	const otherMarketStats = stats.filter((s) => s.market !== userMarket);
+
+	return (
+		<div className="mt-6 mb-6">
+			<h3 className="text-sm font-medium text-gray-900 mb-3">Price</h3>
+
+			{/* User's market MSRP */}
+			{userMarketPrice && (
+				<div className="mb-2">
+					<span className="text-lg font-semibold text-gray-900">
+						{formatPrice(userMarketPrice.priceCents, userMarketPrice.currency as Currency)}
+					</span>
+					<span className="text-xs text-gray-500 ml-2">
+						MSRP ({userMarketPrice.market})
+					</span>
+				</div>
+			)}
+
+			{/* Community stats for user's market */}
+			{userMarketStats.map((stat) => (
+				<p key={`${stat.market}-${stat.currency}`} className="text-sm text-gray-700 mb-1">
+					Community ({stat.market}):{" "}
+					{formatPrice(stat.medianPrice, stat.currency as Currency)} median{" "}
+					<span className="text-xs text-gray-400">
+						({stat.reportCount} reports)
+					</span>
+				</p>
+			))}
+
+			{/* Other Markets collapsible */}
+			{(otherMarketPrices.length > 0 || otherMarketStats.length > 0) && (
+				<div className="mt-3">
+					<button
+						type="button"
+						onClick={() => setShowOtherMarkets(!showOtherMarkets)}
+						className="text-sm text-gray-500 cursor-pointer hover:text-gray-700 flex items-center gap-1"
+					>
+						<LucideIcon
+							name={showOtherMarkets ? "chevron-down" : "chevron-right"}
+							size={14}
+						/>
+						Other Markets
+					</button>
+					{showOtherMarkets && (
+						<div className="pl-4 mt-2 space-y-1">
+							{otherMarketPrices.map((p) => (
+								<div key={`${p.market}-${p.currency}`}>
+									<span className="text-sm font-medium text-gray-900">
+										{formatPrice(p.priceCents, p.currency as Currency)}
+									</span>
+									<span className="text-xs text-gray-500 ml-2">
+										MSRP ({p.market})
+									</span>
+								</div>
+							))}
+							{otherMarketStats.map((stat) => (
+								<p
+									key={`${stat.market}-${stat.currency}`}
+									className="text-sm text-gray-700"
+								>
+									Community ({stat.market}):{" "}
+									{formatPrice(stat.medianPrice, stat.currency as Currency)}{" "}
+									median{" "}
+									<span className="text-xs text-gray-400">
+										({stat.reportCount} reports)
+									</span>
+								</p>
+							))}
+						</div>
+					)}
+				</div>
+			)}
+		</div>
+	);
+}