가상매매 기본전략 설정

frontend/src/components/VirtualTradingPage.tsx

@@ -58,6 +58,8 @@ import {
 import { pinStrategyEvaluationTimeframes } from '../utils/strategyTimeframePin';
 import { persistVirtualTargetPinned } from '../utils/virtualTargetMutations';
 import {
+  applyDefaultGlobalStrategyToSession,
+  ensureDefaultGlobalStrategyId,
   freezeTargetsBeforeGlobalStrategyChange,
   resolveVirtualTargetStrategyId,
 } from '../utils/virtualTargetStrategy';
@@ -166,12 +168,13 @@ const VirtualTradingPage: React.FC<Props> = ({
             const validIds = new Set(
               list.map(s => s.id).filter((id): id is number => id != null && id > 0),
             );
-            setSession(prev => {
-              const next = prev.globalStrategyId != null && !validIds.has(prev.globalStrategyId)
-                ? { ...prev, globalStrategyId: null }
-                : prev;
-              return mergeVirtualSessionWithAppLive(next, appLiveStrategyId);
-            });
+            setSession(prev =>
+              applyDefaultGlobalStrategyToSession(
+                mergeVirtualSessionWithAppLive(prev, appLiveStrategyId),
+                list,
+                appLiveStrategyId,
+              ),
+            );
             setTargets(prev =>
               prev.map(t =>
                 t.strategyId != null && !validIds.has(t.strategyId)
@@ -380,20 +383,25 @@ const VirtualTradingPage: React.FC<Props> = ({
       window.alert('투자대상 종목을 먼저 추가하세요.');
       return;
     }
-    if (!session.globalStrategyId) {
+    const globalStrategyId = ensureDefaultGlobalStrategyId(session.globalStrategyId, strategies);
+    if (!globalStrategyId) {
       window.alert('투자전략을 선택하세요.');
       return;
     }
-    const globalStrat = strategies.find(s => s.id === session.globalStrategyId);
+    const sessionForStart = { ...session, globalStrategyId };
+    if (session.globalStrategyId !== globalStrategyId) {
+      setSession(sessionForStart);
+    }
+    const globalStrat = strategies.find(s => s.id === globalStrategyId);
     const synced = await syncStrategyTimeframesFromLayoutIfNeeded(
-      session.globalStrategyId,
+      globalStrategyId,
       globalStrat,
     );
     if (!synced) return;
-    const ok = await warnStrategyTimeframeMismatch(session.globalStrategyId, globalStrat);
+    const ok = await warnStrategyTimeframeMismatch(globalStrategyId, globalStrat);
     if (!ok) return;
     try {
-      await syncVirtualTargetsToBackend(targets, session, true);
+      await syncVirtualTargetsToBackend(targets, sessionForStart, true);
       setSession(s => ({ ...s, running: true }));
     } catch {
       window.alert('가상투자 시작 설정 저장에 실패했습니다.');