알림목록 obv 그래프 문제 최종수정

frontend/src/utils/workspaceChartIndicatorsCache.ts

@@ -0,0 +1,48 @@
+/**
+ * 워크스페이스 slot0 보조지표 — 알림 미니 차트가 메인 차트 인스턴스 스타일과 맞추도록
+ */
+import type { IndicatorConfig } from '../types';
+import { loadWorkspace } from './backendApi';
+
+let cached: IndicatorConfig[] | null = null;
+let loadPromise: Promise<IndicatorConfig[]> | null = null;
+let loadedSessionKey: number | null = null;
+
+export function invalidateWorkspaceChartIndicatorsCache(): void {
+  cached = null;
+  loadPromise = null;
+  loadedSessionKey = null;
+}
+
+export function ensureWorkspaceChartIndicators(sessionKey = 0): Promise<IndicatorConfig[]> {
+  if (cached !== null && loadedSessionKey === sessionKey) {
+    return Promise.resolve(cached);
+  }
+  if (loadedSessionKey !== sessionKey) {
+    cached = null;
+    loadPromise = null;
+  }
+  if (!loadPromise) {
+    loadPromise = loadWorkspace()
+      .then(ws => {
+        const slot0 = (Array.isArray(ws?.slots) ? ws.slots[0] : null) as
+          | { indicators?: IndicatorConfig[] }
+          | null;
+        cached = Array.isArray(slot0?.indicators) ? slot0!.indicators! : [];
+        loadedSessionKey = sessionKey;
+        loadPromise = null;
+        return cached;
+      })
+      .catch(() => {
+        cached = [];
+        loadedSessionKey = sessionKey;
+        loadPromise = null;
+        return [];
+      });
+  }
+  return loadPromise;
+}
+
+export function getWorkspaceChartIndicatorsCache(): IndicatorConfig[] | null {
+  return cached;
+}