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frontend/src/contexts/TradeNotificationContext.tsx

@@ -27,8 +27,7 @@ import {
   type TradeAlertSoundId,
 } from '../utils/tradeAlertSound';
 
-const STORAGE_KEY = 'gc_trade_notify_read_v1';
-const HIDDEN_STORAGE_KEY = 'gc_trade_notify_hidden_v1';
+import { getUiPreferences, patchUiPreferences } from '../utils/uiPreferencesDb';
 const MAX_HISTORY = 300;
 /** 팝업 대기열 최대 건수 (페이지 슬라이딩) */
 const MAX_TOAST_QUEUE = 50;
@@ -94,35 +93,21 @@ function dtoToItem(dto: TradeSignalDto, readIds: Set<string>): TradeNotification
 }
 
 function loadReadIds(): Set<string> {
-  try {
-    const raw = localStorage.getItem(STORAGE_KEY);
-    if (!raw) return new Set();
-    return new Set(JSON.parse(raw) as string[]);
-  } catch {
-    return new Set();
-  }
+  const ids = getUiPreferences().tradeNotifications?.readIds;
+  return new Set(ids ?? []);
 }
 
 function saveReadIds(ids: Set<string>) {
-  try {
-    localStorage.setItem(STORAGE_KEY, JSON.stringify([...ids]));
-  } catch { /* ignore */ }
+  patchUiPreferences({ tradeNotifications: { readIds: [...ids] } });
 }
 
 function loadHiddenIds(): Set<string> {
-  try {
-    const raw = localStorage.getItem(HIDDEN_STORAGE_KEY);
-    if (!raw) return new Set();
-    return new Set(JSON.parse(raw) as string[]);
-  } catch {
-    return new Set();
-  }
+  const ids = getUiPreferences().tradeNotifications?.hiddenIds;
+  return new Set(ids ?? []);
 }
 
 function saveHiddenIds(ids: Set<string>) {
-  try {
-    localStorage.setItem(HIDDEN_STORAGE_KEY, JSON.stringify([...ids]));
-  } catch { /* ignore */ }
+  patchUiPreferences({ tradeNotifications: { hiddenIds: [...ids] } });
 }
 
 export function useTradeNotification(): TradeNotificationContextValue {