OBV 신호선 점선 처리로 본선과 시각 구분 보장

- 진단 로그로 두 시리즈가 정상 생성됨을 확인 (series:2, visible:true, color:#2196F3)
- 미니차트는 800봉 누적 OBV 계산 → 마지막 200봉 구간에서 OBV와 SMA(9)가 수렴,
  주황 신호선이 파란 본선을 덮어 1개 선처럼 보이는 것이 원인
- registry plot1에 lineStyle:'dashed' 추가
- normalizeSignalLineIndicatorPlots OBV 분기에서 plot0=solid, plot1=dashed 강제

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/utils/ChartManager.ts

@@ -928,23 +928,6 @@ export class ChartManager {
         );
       }
 
-      // ── OBV 진단 로그 (개발용) ────────────────────────────────────────────
-      if (config.type === 'OBV') {
-        const plotKeys = Object.keys(result.plots);
-        const seriesIds = seriesMeta.map(m => m.plotId);
-        const volSum = this.rawBars.reduce((s, b) => s + (Number(b.volume) || 0), 0);
-        // eslint-disable-next-line no-console
-        console.error(
-          '[OBV Debug] series:', seriesList.length,
-          '| plotIds:', seriesIds,
-          '| resultKeys:', plotKeys,
-          '| plotVisibility:', JSON.stringify(config.plotVisibility),
-          '| plot0Color:', config.plots?.find(p => p.id === 'plot0')?.color,
-          '| bars:', this.rawBars.length,
-          '| volSum>0:', volSum > 0,
-          '| pane:', pane,
-        );
-      }
 
       // hlines(과열선/중앙선/침체선)는 첫 번째 시리즈에만 한 번 생성 (중복 방지)
       const hlineRefs: IPriceLine[] = [];
@@ -2921,11 +2904,6 @@ export class ChartManager {
       } else {
         opts['color'] = plot.color ?? '#aaa';
       }
-      // ── OBV plot0 스타일 진단 로그 ──────────────────────────────────────────
-      if (entry.type === 'OBV' && pid === 'plot0') {
-        // eslint-disable-next-line no-console
-        console.error('[OBV Style] plot0 opts:', JSON.stringify({ visible: opts['visible'], color: opts['color'], lineWidth: opts['lineWidth'] }));
-      }
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       series.applyOptions(opts as any);
     });

frontend/src/utils/indicatorRegistry.ts

@@ -349,7 +349,7 @@ export const INDICATOR_REGISTRY: IndicatorDef[] = [
   { type:'HistoricalVolatility',name:'Historical Volatility',    koreanName:'역사적변동성',    shortName:'HV',     category:'Volatility', overlay:false, defaultParams:{length:20, annualBars:252},               plots:[{id:'plot0',title:'HV',   color:'#E91E63',type:'line',lineWidth:2}],                                                                                         description:'역사적 변동성 (연화)' },
 
   // ── Volume ────────────────────────────────────────────────────────────────
-  { type:'OBV',                 name:'On Balance Volume',          koreanName:'잔량균형지수',        shortName:'OBV',   category:'Volume', overlay:false, defaultParams:{maType:'SMA', maLength:9},                      plots:[{id:'plot0',title:'OBV',  color:'#2196F3',type:'line',lineWidth:2},{id:'plot1',title:'Signal',color:'#FF9800',type:'line',lineWidth:1}], hlines:[], description:'잔량 균형 지수 (OBV + 이동평균 신호선)' },
+  { type:'OBV',                 name:'On Balance Volume',          koreanName:'잔량균형지수',        shortName:'OBV',   category:'Volume', overlay:false, defaultParams:{maType:'SMA', maLength:9},                      plots:[{id:'plot0',title:'OBV',  color:'#2196F3',type:'line',lineWidth:2},{id:'plot1',title:'Signal',color:'#FF9800',type:'line',lineWidth:1,lineStyle:'dashed'}], hlines:[], description:'잔량 균형 지수 (OBV + 이동평균 신호선)' },
   { type:'VR',                  name:'Volume Ratio',               koreanName:'거래량비율',          shortName:'VR',    category:'Volume', overlay:false, defaultParams:{length:10},                                 plots:[{id:'plot0',title:'VR',   color:'#AB47BC',type:'line',lineWidth:2}],                                  hlines:[{price:200,color:'#EF5350'},{price:100,color:'#607D8B'},{price:50,color:'#4CAF50'}], description:'거래량 비율 (VR)' },
   { type:'Disparity',           name:'Disparity Index',            koreanName:'이격도',              shortName:'Disp',  category:'Oscillators', overlay:false, defaultParams:{ultraLength:5, shortLength:10, midLength:20, longLength:60, src:'close'}, plots:[{id:'plot0',title:'초단기',color:'#E91E63',type:'line',lineWidth:1},{id:'plot1',title:'단기',color:'#FF9800',type:'line',lineWidth:1},{id:'plot2',title:'중기',color:'#4CAF50',type:'line',lineWidth:1},{id:'plot3',title:'장기',color:'#2196F3',type:'line',lineWidth:1}], hlines:[{price:100,color:'#607D8B'}], description:'이격도 (종가÷이평×100)' },
   { type:'Psychological',       name:'Psychological Line',         koreanName:'심리도',              shortName:'Psy',   category:'Oscillators', overlay:false, defaultParams:{length:12},                                 plots:[{id:'plot0',title:'심리도',color:'#00BCD4',type:'line',lineWidth:2}],                              hlines:[{price:75,color:'#EF5350',label:'과열선'},{price:50,color:'#607D8B',label:'중앙선'},{price:25,color:'#4CAF50',label:'침체선'}], description:'심리도 (상승일 비율)' },
@@ -481,6 +481,14 @@ function normalizeSignalLineIndicatorPlots(
           type: 'line' as const,
           color: reg.color,
           lineWidth: Math.max(2, normalized.lineWidth ?? reg.lineWidth ?? 2),
+          lineStyle: 'solid' as const,
+        };
+      }
+      // OBV 신호선 — 값이 본선과 거의 같더라도 점선으로 시각적 구분 보장
+      if (p.id === 'plot1') {
+        return {
+          ...normalized,
+          lineStyle: 'dashed' as const,
         };
       }
       return normalized;