Merge pull request 'fix: 가상선박 아이콘 SDF halo 아티팩트 제거' (#192) from release/2026-03-25 into develop

frontend/src/components/korea/FleetClusterLayer.tsx

@@ -771,8 +771,8 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
           }}
           paint={{
             'icon-color': ['get', 'color'],
-            'icon-halo-color': ['case', ['==', ['get', 'isParent'], 1], '#fbbf24', 'rgba(0,0,0,0.6)'],
-            'icon-halo-width': ['case', ['==', ['get', 'isParent'], 1], 2, 0.5],
+            'icon-halo-color': 'rgba(0,0,0,0.6)',
+            'icon-halo-width': 0.5,
             'text-color': ['get', 'color'],
             'text-halo-color': '#000000',
             'text-halo-width': 1,