429 에러 수정

frontend/src/hooks/useMediaQuery.ts

@@ -22,3 +22,8 @@ export function useMediaQuery(query: string): boolean {
 export function useIsMobile(): boolean {
   return useMediaQuery('(max-width: 768px)');
 }
+
+/** 모바일·태블릿 — ticker REST 경량·WS 위주 (≤1024px) */
+export function useIsCompactDevice(): boolean {
+  return useMediaQuery('(max-width: 1024px)');
+}