fix: enabledVessels 토글 시 모델 중심 경로 재계산

- setEnabledVessels: rawCorrelationTracks로 modelCenterTrails 재빌드
- rawCorrelationTracks 필드 추가 (원본 트랙 보존)
- 선박/어구 on/off → 폴리곤 + 중심경로 + 중심점 동시 갱신

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/stores/gearReplayStore.ts

@@ -58,6 +58,7 @@ interface GearReplayState {
   historyFrames: HistoryFrame[];
   frameTimes: number[];
   selectedGroupKey: string | null;
+  rawCorrelationTracks: CorrelationVesselTrack[];
 
   // Pre-computed layer data
   memberTripsData: TripsLayerDatum[];
@@ -134,6 +135,7 @@ export const useGearReplayStore = create<GearReplayState>()(
       historyFrames: [],
       frameTimes: [],
       selectedGroupKey: null,
+      rawCorrelationTracks: [],
 
       // Pre-computed layer data
       memberTripsData: [],
@@ -178,6 +180,7 @@ export const useGearReplayStore = create<GearReplayState>()(
           startTime,
           endTime,
           currentTime: startTime,
+          rawCorrelationTracks: corrTracks,
           memberTripsData: memberTrips,
           correlationTripsData: corrTrips,
           centerTrailSegments: segments,
@@ -224,7 +227,13 @@ export const useGearReplayStore = create<GearReplayState>()(
 
       setEnabledModels: (models) => set({ enabledModels: models }),
 
-      setEnabledVessels: (vessels) => set({ enabledVessels: vessels }),
+      setEnabledVessels: (vessels) => {
+        const state = get();
+        const modelTrails = state.historyFrames.length > 0
+          ? buildModelCenterTrails(state.historyFrames, state.rawCorrelationTracks, state.correlationByModel, vessels, state.startTime)
+          : [];
+        set({ enabledVessels: vessels, modelCenterTrails: modelTrails });
+      },
 
       setHoveredMmsi: (mmsi) => set({ hoveredMmsi: mmsi }),
       setShowTrails: (show) => set({ showTrails: show }),
@@ -250,7 +259,7 @@ export const useGearReplayStore = create<GearReplayState>()(
           corrTracks: corrTracks.length,
         });
         const modelTrails = buildModelCenterTrails(state.historyFrames, corrTracks, byModel, state.enabledVessels, state.startTime);
-        set({ correlationByModel: byModel, correlationTripsData: corrTrips, modelCenterTrails: modelTrails });
+        set({ correlationByModel: byModel, correlationTripsData: corrTrips, modelCenterTrails: modelTrails, rawCorrelationTracks: corrTracks });
       },
 
       reset: () => {
@@ -268,6 +277,7 @@ export const useGearReplayStore = create<GearReplayState>()(
           historyFrames: [],
           frameTimes: [],
           selectedGroupKey: null,
+          rawCorrelationTracks: [],
           memberTripsData: [],
           correlationTripsData: [],
           centerTrailSegments: [],