goldenChat base source add

frontend/src/utils/storage.ts

@@ -0,0 +1,78 @@
+import type { IndicatorConfig, Theme, ChartType, Timeframe, MainChartStyle } from '../types';
+
+interface ChartState {
+  version:        number;
+  symbol:         string;
+  timeframe:      Timeframe;
+  chartType:      ChartType;
+  theme:          Theme;
+  indicators:     IndicatorConfig[];
+  watchlist:      string[];
+  alertPrices:    number[];
+  mainChartStyle?: MainChartStyle;
+}
+
+const KEY          = 'trading_chart_state';
+const CUR_VERSION  = 8;   // v8: 기본 지표 제거 — 초기 로딩 시 캔들차트만 표시
+
+/** 기본 보조지표 없음 — 처음 로딩 시 캔들차트만 표시 */
+const DEFAULT_INDICATORS: IndicatorConfig[] = [];
+
+const DEFAULT_WATCHLIST = [
+  'KRW-BTC', 'KRW-ETH', 'KRW-XRP', 'KRW-SOL', 'KRW-DOGE',
+  'KRW-ADA', 'KRW-AVAX', 'KRW-DOT',
+];
+
+/**
+ * 절대적 최후 fallback 기본값.
+ * 우선순위: DB(gc_app_settings) > localStorage > 이 값.
+ * 타임프레임을 '1h' 에서 '1D' 로 통일 (ChartSlot 기본값과 일치).
+ */
+const DEFAULT_STATE: ChartState = {
+  version:     CUR_VERSION,
+  symbol:      'KRW-BTC',
+  timeframe:   '1D',
+  chartType:   'candlestick',
+  theme:       'dark',
+  indicators:  DEFAULT_INDICATORS,
+  watchlist:   DEFAULT_WATCHLIST,
+  alertPrices: [],
+};
+
+export function saveState(state: Partial<ChartState>): void {
+  try {
+    const existing = loadState();
+    localStorage.setItem(KEY, JSON.stringify({ ...existing, ...state, version: CUR_VERSION }));
+  } catch { /* ignore */ }
+}
+
+export function loadState(): ChartState {
+  try {
+    const raw = localStorage.getItem(KEY);
+    if (raw) {
+      const parsed = JSON.parse(raw) as ChartState;
+      // 버전이 다르면 기본값으로 재설정 (마이그레이션)
+      if (parsed.version !== CUR_VERSION) {
+        localStorage.removeItem(KEY);
+        return DEFAULT_STATE;
+      }
+      return parsed;
+    }
+  } catch { /* ignore */ }
+  return DEFAULT_STATE;
+}
+
+export function clearState(): void {
+  localStorage.removeItem(KEY);
+}
+
+export const DEFAULT_MAIN_CHART_STYLE: MainChartStyle = {
+  upColor:         '#ff6b6b',
+  downColor:       '#4dabf7',
+  borderUpColor:   '#ff6b6b',
+  borderDownColor: '#4dabf7',
+  wickUpColor:     '#ff6b6b',
+  wickDownColor:   '#4dabf7',
+};
+
+export { DEFAULT_INDICATORS };