전략평가 화면 수정

frontend/src/components/StrategyEvaluationPage.tsx

@@ -382,6 +382,7 @@ export default function StrategyEvaluationPage({ theme = 'dark' }: Props) {
                 appliedParams={appliedIndicatorParams}
                 onSave={handleSaveIndicatorParams}
                 onReset={handleResetIndicatorParams}
+                applying={evalLoading || chartLoading}
               />
             )}
           </div>

frontend/src/components/strategyEvaluation/StrategyEvaluationChart.tsx

@@ -268,11 +268,6 @@ const StrategyEvaluationChart: React.FC<Props> = ({
     mgr.applyVisibleTimeRange(bar.time - barSec * 24, bar.time + barSec * 8);
   }, [chartMgr, bars]);
 
-  useEffect(() => {
-    if (bars.length === 0) return;
-    scrollToBar(Math.min(Math.max(0, selectedBarIndex), bars.length - 1));
-  }, [selectedBarIndex, bars, scrollToBar]);
-
   const onManagerReady = useCallback((mgr: ChartManager) => {
     managerRef.current = mgr;
     setChartMgr(mgr);
@@ -299,8 +294,10 @@ const StrategyEvaluationChart: React.FC<Props> = ({
 
   const goLatest = useCallback(() => {
     if (bars.length === 0) return;
-    onSelectedBarIndexChange(bars.length - 1);
-  }, [bars.length, onSelectedBarIndexChange]);
+    const lastIdx = bars.length - 1;
+    onSelectedBarIndexChange(lastIdx);
+    scrollToBar(lastIdx);
+  }, [bars.length, onSelectedBarIndexChange, scrollToBar]);
 
   useEffect(() => {
     const mgr = chartMgr;

frontend/src/components/strategyEvaluation/StrategyEvaluationSettingsTab.tsx

@@ -20,6 +20,7 @@ interface Props {
   appliedParams: EvalIndicatorParams | null;
   onSave: (params: EvalIndicatorParams) => void;
   onReset: () => void;
+  applying?: boolean;
 }
 
 function getEditableParamKeys(
@@ -47,6 +48,7 @@ const StrategyEvaluationSettingsTab: React.FC<Props> = ({
   appliedParams,
   onSave,
   onReset,
+  applying = false,
 }) => {
   const [draft, setDraft] = useState<EvalIndicatorParams>({});
   const [expanded, setExpanded] = useState<string | null>(null);
@@ -56,23 +58,31 @@ const StrategyEvaluationSettingsTab: React.FC<Props> = ({
     [strategy],
   );
 
+  const resolveBaseline = useCallback((): EvalIndicatorParams => {
+    if (!strategy) return {};
+    return appliedParams ?? buildEvalParamsFromStrategy(strategy, getParams);
+  }, [strategy, appliedParams, getParams]);
+
   useEffect(() => {
     if (!strategy) {
       setDraft({});
       setExpanded(null);
       return;
     }
-    const baseline = appliedParams ?? buildEvalParamsFromStrategy(strategy, getParams);
-    setDraft(JSON.parse(JSON.stringify(baseline)) as EvalIndicatorParams);
+    setDraft(JSON.parse(JSON.stringify(resolveBaseline())) as EvalIndicatorParams);
     setExpanded(indicatorTypes[0] ?? null);
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [strategy?.id, appliedParams, indicatorTypes.join(',')]);
 
   const dirty = useMemo(
-    () => hasEvalParamsDiff(draft, appliedParams),
-    [draft, appliedParams],
+    () => hasEvalParamsDiff(draft, resolveBaseline()),
+    [draft, resolveBaseline],
   );
 
+  const handleApply = useCallback(() => {
+    onSave(JSON.parse(JSON.stringify(draft)) as EvalIndicatorParams);
+  }, [draft, onSave]);
+
   const patchParam = useCallback((type: string, key: string, raw: string | boolean) => {
     setDraft(prev => {
       const current = prev[type] ?? {};
@@ -115,8 +125,19 @@ const StrategyEvaluationSettingsTab: React.FC<Props> = ({
   return (
     <div className="seval-settings-tab">
       <div className="seval-settings-head">
+        <div className="seval-settings-head-row">
           <p className="seval-settings-strategy">{strategyName}</p>
-        <p className="seval-settings-hint">지표 값을 변경 후 저장하면 차트·일치율이 재계산됩니다</p>
+          <button
+            type="button"
+            className="seval-settings-apply"
+            disabled={!dirty || applying}
+            onClick={handleApply}
+            title="변경된 지표 값을 차트·일치율에 반영"
+          >
+            {applying ? '적용 중…' : '적용'}
+          </button>
+        </div>
+        <p className="seval-settings-hint">지표 값을 변경한 뒤 적용을 누르면 차트·일치율이 갱신됩니다</p>
       </div>
 
       <div className="seval-settings-list">
@@ -163,18 +184,10 @@ const StrategyEvaluationSettingsTab: React.FC<Props> = ({
       </div>
 
       <div className="seval-settings-actions">
-        <button
-          type="button"
-          className="seval-settings-save"
-          disabled={!dirty}
-          onClick={() => onSave(JSON.parse(JSON.stringify(draft)) as EvalIndicatorParams)}
-        >
-          저장 · 재계산
-        </button>
         <button
           type="button"
           className="seval-settings-reset"
-          disabled={!appliedParams && !dirty}
+          disabled={(!appliedParams && !dirty) || applying}
           onClick={onReset}
         >
           초기화

frontend/src/styles/strategyEvaluation.css

@@ -1004,11 +1004,43 @@
   padding: 4px 2px 8px;
 }
 
+.seval-settings-head-row {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 10px;
+}
+
 .seval-settings-strategy {
   margin: 0;
+  flex: 1;
+  min-width: 0;
   font-size: 0.78rem;
   font-weight: 700;
   color: var(--se-text);
+  line-height: 1.35;
+}
+
+.seval-settings-apply {
+  flex-shrink: 0;
+  padding: 6px 14px;
+  border-radius: 8px;
+  border: 1px solid color-mix(in srgb, var(--btd-gold, var(--se-gold)) 45%, var(--se-border));
+  background: color-mix(in srgb, var(--btd-gold, var(--se-gold)) 16%, var(--se-input-bg));
+  color: var(--btd-gold, var(--se-gold));
+  font-size: 0.72rem;
+  font-weight: 700;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+.seval-settings-apply:hover:not(:disabled) {
+  background: color-mix(in srgb, var(--btd-gold, var(--se-gold)) 24%, var(--se-input-bg));
+}
+
+.seval-settings-apply:disabled {
+  opacity: 0.45;
+  cursor: not-allowed;
 }
 
 .seval-settings-hint {
@@ -1089,7 +1121,6 @@
   border-top: 1px solid var(--btd-divider, var(--se-border));
 }
 
-.seval-settings-save,
 .seval-settings-reset {
   flex: 1;
   padding: 9px 10px;
@@ -1097,26 +1128,16 @@
   font-size: 0.74rem;
   font-weight: 600;
   cursor: pointer;
-}
-
-.seval-settings-save {
-  border: 1px solid color-mix(in srgb, var(--btd-gold, var(--se-gold)) 45%, var(--se-border));
-  background: color-mix(in srgb, var(--btd-gold, var(--se-gold)) 12%, var(--se-input-bg));
-  color: var(--btd-gold, var(--se-gold));
-}
-
-.seval-settings-save:disabled,
-.seval-settings-reset:disabled {
-  opacity: 0.45;
-  cursor: not-allowed;
-}
-
-.seval-settings-reset {
   border: 1px solid var(--btd-divider, var(--se-border));
   background: var(--btd-surface, var(--se-input-bg));
   color: var(--se-text-muted);
 }
 
+.seval-settings-reset:disabled {
+  opacity: 0.45;
+  cursor: not-allowed;
+}
+
 @media (max-width: 960px) {
   .seval-chart-hint {
     display: none;