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({