frontend/src/components/RawDataPanel.tsx

@@ -0,0 +1,60 @@
+import { useState, useMemo } from 'react'
+
+interface RawDataPanelProps {
+  /** 패널 제목 */
+  title: string
+  /** 표시할 데이터 객체 (JSON.stringify 대상) */
+  data: unknown
+  /** 데이터 없을 때 안내 문구 */
+  emptyText?: string
+}
+
+/**
+ * Swagger Response처럼 실제 API 응답 데이터를 JSON으로 표시하는 패널
+ * 좌측 사이드바 하단에 남은 영역을 채움
+ */
+export default function RawDataPanel({ title, data, emptyText = '데이터 없음' }: RawDataPanelProps) {
+  const [collapsed, setCollapsed] = useState(false)
+
+  const jsonStr = useMemo(() => {
+    if (data == null) return null
+    try {
+      return JSON.stringify(data, null, 2)
+    } catch {
+      return String(data)
+    }
+  }, [data])
+
+  const hasData = jsonStr != null && jsonStr !== 'null' && jsonStr !== '{}' && jsonStr !== '[]'
+
+  return (
+    <div className="flex flex-col overflow-hidden rounded-lg border border-border">
+      {/* 헤더 */}
+      <button
+        onClick={() => setCollapsed((c) => !c)}
+        className="flex items-center justify-between px-3 py-2 text-xs font-medium text-muted hover:bg-surface-hover transition"
+      >
+        <span className="flex items-center gap-1.5">
+          <span className="font-mono text-[10px] rounded bg-primary/10 text-primary px-1 py-0.5">
+            JSON
+          </span>
+          {title}
+        </span>
+        <span className="text-[10px]">{collapsed ? '▶' : '▼'}</span>
+      </button>
+
+      {/* 본문 */}
+      {!collapsed && (
+        <div className="flex-1 overflow-auto border-t border-border bg-surface-hover/30">
+          {hasData ? (
+            <pre className="whitespace-pre-wrap break-all p-2 text-[11px] leading-relaxed font-mono text-foreground/80 select-all">
+              {jsonStr}
+            </pre>
+          ) : (
+            <div className="p-3 text-center text-xs text-muted">{emptyText}</div>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}

frontend/src/features/vessel-tracks/components/VesselTracksLayer.tsx

@@ -34,17 +34,22 @@ export function useVesselTracksLayer({ zoom }: VesselTracksLayerProps): Layer[]
       }))
 
     // 2. 현재 위치 아이콘 레이어
+    // 항적 데이터의 speeds가 0 (백엔드 WKT→좌표 변환 시 속도 미포함)
+    // 항적이 있으면 운항 중이므로 이동 아이콘 표시
     const positions = getCurrentPositions()
-    const iconData: VesselIconData[] = positions.map((p) => ({
-      mmsi: p.vesselId,
-      position: [p.lon, p.lat],
-      angle: p.heading,
-      icon: getIconKey(p.shipKindCode, p.speed),
-      size: getIconSize(zoom, p.shipKindCode, p.speed),
-      shipNm: p.shipName,
-      shipKindCode: p.shipKindCode,
-      sog: p.speed,
-    }))
+    const iconData: VesselIconData[] = positions.map((p) => {
+      const displaySog = p.speed > 0 ? p.speed : 2
+      return {
+        mmsi: p.vesselId,
+        position: [p.lon, p.lat],
+        angle: p.heading,
+        icon: getIconKey(p.shipKindCode, displaySog),
+        size: getIconSize(zoom, p.shipKindCode, displaySog),
+        shipNm: p.shipName,
+        shipKindCode: p.shipKindCode,
+        sog: p.speed,
+      }
+    })
 
     return [
       createTrackPathLayer({ id: 'vessel-track-path', data: pathData }),

frontend/src/features/viewport-replay/components/ReplayLayer.tsx

@@ -64,16 +64,19 @@ export function useReplayLayer({ zoom, onLayersUpdate }: ReplayLayerProps) {
       const relativeTime = currentTime - startTime
 
       const positions = useAnimationStore.getState().getCurrentVesselPositions()
-      const iconData: VesselIconData[] = positions.map((p) => ({
-        mmsi: p.vesselId,
-        position: [p.lon, p.lat],
-        angle: p.heading,
-        icon: getIconKey(p.shipKindCode, p.speed),
-        size: getIconSize(zoom, p.shipKindCode, p.speed),
-        shipNm: p.shipName,
-        shipKindCode: p.shipKindCode,
-        sog: p.speed,
-      }))
+      const iconData: VesselIconData[] = positions.map((p) => {
+        const displaySog = p.speed > 0 ? p.speed : 2
+        return {
+          mmsi: p.vesselId,
+          position: [p.lon, p.lat],
+          angle: p.heading,
+          icon: getIconKey(p.shipKindCode, displaySog),
+          size: getIconSize(zoom, p.shipKindCode, displaySog),
+          shipNm: p.shipName,
+          shipKindCode: p.shipKindCode,
+          sog: p.speed,
+        }
+      })
 
       const layers: Layer[] = [
         new TripsLayer<TripsData>({

frontend/src/pages/ApiExplorer.tsx

@@ -1,7 +1,8 @@
-import { useState, useCallback, useRef } from 'react'
+import { useState, useCallback, useRef, useMemo } from 'react'
 import { useI18n } from '../hooks/useI18n.ts'
 import MapContainer from '../components/map/MapContainer.tsx'
 import Sidebar from '../components/layout/Sidebar.tsx'
+import RawDataPanel from '../components/RawDataPanel.tsx'
 import type maplibregl from 'maplibre-gl'
 import type { Layer } from '@deck.gl/core'
 import {
@@ -16,14 +17,79 @@ import {
   TrackQueryPanel,
   TrackInfoPanel,
 } from '../features/vessel-tracks'
+import { useTrackStore } from '../features/vessel-tracks/stores/trackStore'
 import {
   useReplayLayer,
+  useReplayStore,
+  useMergedTrackStore,
   ReplaySetupPanel,
   ReplayControlPanel,
 } from '../features/viewport-replay'
 
 type ApiMode = 'positions' | 'vessel' | 'replay'
 
+/** 최근위치 — 선택된 선박의 원본 데이터 */
+function usePositionRawData() {
+  const selectedMmsi = usePositionStore((s) => s.selectedMmsi)
+  const positions = usePositionStore((s) => s.positions)
+
+  return useMemo(() => {
+    if (!selectedMmsi) return null
+    const vessel = positions.get(selectedMmsi)
+    return vessel ?? null
+  }, [selectedMmsi, positions])
+}
+
+/** 항적 — 조회 결과 요약 데이터 */
+function useTrackRawData() {
+  const tracks = useTrackStore((s) => s.tracks)
+
+  return useMemo(() => {
+    if (tracks.length === 0) return null
+    return tracks.map((t) => ({
+      vesselId: t.vesselId,
+      shipName: t.shipName,
+      shipKindCode: t.shipKindCode,
+      nationalCode: t.nationalCode,
+      pointCount: t.geometry.length,
+      totalDistance: t.totalDistance,
+      avgSpeed: t.avgSpeed,
+      maxSpeed: t.maxSpeed,
+      timeRange: t.timestampsMs.length >= 2
+        ? [new Date(t.timestampsMs[0]).toISOString(), new Date(t.timestampsMs[t.timestampsMs.length - 1]).toISOString()]
+        : null,
+    }))
+  }, [tracks])
+}
+
+/** 리플레이 — 청크 병합 결과 데이터 */
+function useReplayRawData() {
+  const vesselChunks = useMergedTrackStore((s) => s.vesselChunks)
+  const queryCompleted = useReplayStore((s) => s.queryCompleted)
+  const receivedChunks = useReplayStore((s) => s.receivedChunks)
+
+  return useMemo(() => {
+    if (vesselChunks.size === 0) return null
+    const vessels: Record<string, unknown>[] = []
+    for (const [mmsi, data] of vesselChunks) {
+      vessels.push({
+        vesselId: mmsi,
+        shipName: data.shipName,
+        shipKindCode: data.shipKindCode,
+        nationalCode: data.nationalCode,
+        chunkCount: data.chunks.length,
+        totalPoints: data.chunks.reduce((sum, c) => sum + (c.geometry?.length ?? 0), 0),
+      })
+    }
+    return {
+      queryCompleted,
+      receivedChunks,
+      vesselCount: vessels.length,
+      vessels,
+    }
+  }, [vesselChunks, queryCompleted, receivedChunks])
+}
+
 export default function ApiExplorer() {
   const { t } = useI18n()
   const [mode, setMode] = useState<ApiMode>('positions')
@@ -69,6 +135,11 @@ export default function ApiExplorer() {
     selectVessel(null)
   }, [selectVessel])
 
+  // Raw Data 훅
+  const positionData = usePositionRawData()
+  const trackData = useTrackRawData()
+  const replayData = useReplayRawData()
+
   // 모드별 Deck.gl 레이어
   const deckLayers: Layer[] =
     mode === 'positions' ? positionLayers :
@@ -80,7 +151,7 @@ export default function ApiExplorer() {
     <div className="flex h-[calc(100vh-3.5rem)] overflow-hidden">
       {/* Sidebar */}
       <div className="relative flex">
-        <Sidebar width={320}>
+        <Sidebar width={340}>
           <div className="space-y-4">
             <h2 className="text-lg font-bold">{t('explorer.title')}</h2>
 
@@ -131,6 +202,29 @@ export default function ApiExplorer() {
                 <ReplaySetupPanel map={mapRef.current} />
               </div>
             )}
+
+            {/* Response Data — Swagger Response 스타일 */}
+            {mode === 'positions' && (
+              <RawDataPanel
+                title="선박 상세 (클릭)"
+                data={positionData}
+                emptyText="지도에서 선박을 클릭하세요"
+              />
+            )}
+            {mode === 'vessel' && (
+              <RawDataPanel
+                title="항적 조회 결과"
+                data={trackData}
+                emptyText="MMSI를 입력하고 조회하세요"
+              />
+            )}
+            {mode === 'replay' && (
+              <RawDataPanel
+                title="리플레이 데이터"
+                data={replayData}
+                emptyText="뷰포트 리플레이를 실행하세요"
+              />
+            )}
           </div>
         </Sidebar>
       </div>