fix(map): ScatMap scatDetailData import 제거 + Vite shimMissingExports 설정

- scatDetailData는 scatConstants에 없는 export — import 제거, seg.id 직접 사용
- deck.gl → @loaders.gl/worker-utils가 Node.js child_process.spawn 참조하나
  브라우저에서 미사용 코드 경로이므로 shimMissingExports: true로 해결

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/tabs/scat/components/ScatMap.tsx

@@ -5,7 +5,7 @@ import { PathLayer, ScatterplotLayer } from '@deck.gl/layers'
 import type { StyleSpecification } from 'maplibre-gl'
 import 'maplibre-gl/dist/maplibre-gl.css'
 import type { ScatSegment } from './scatTypes'
-import { esiColor, jejuCoastCoords, scatDetailData } from './scatConstants'
+import { esiColor, jejuCoastCoords } from './scatConstants'
 import { hexToRgba } from '@common/components/map/mapUtils'
 
 const BASE_STYLE: StyleSpecification = {
@@ -102,7 +102,7 @@ function ScatMap({ segments, selectedSeg, onSelectSeg, onOpenPopup }: ScatMapPro
   const handleClick = useCallback(
     (seg: ScatSegment) => {
       onSelectSeg(seg)
-      onOpenPopup(seg.id % scatDetailData.length)
+      onOpenPopup(seg.id)
     },
     [onSelectSeg, onOpenPopup],
   )

frontend/vite.config.ts

@@ -11,4 +11,11 @@ export default defineConfig({
       '@tabs': path.resolve(__dirname, 'src/tabs'),
     },
   },
+  build: {
+    rollupOptions: {
+      // deck.gl → @loaders.gl/worker-utils가 Node.js child_process를 참조하나
+      // 브라우저에서는 해당 코드 경로를 타지 않으므로 undefined shim 허용
+      shimMissingExports: true,
+    },
+  },
 })