Revert "Reapply "fix(abut): 날개벽의 연직 헌치 삭제""

This reverts commit 61ef001034.

src/view/abut-scene.ts

@@ -293,6 +293,15 @@ export function buildAbutGroup(
       const origin = new THREE.Vector3(sEnd + a * WING_THICKNESS_M + dir.ws * f.dMFrom, f.el, dir.wt * f.dMFrom);
       add('haunches', prism(triangle, f.dMTo - f.dMFrom, origin, new THREE.Vector3(a, 0, 0), ey, new THREE.Vector3(dir.ws, 0, dir.wt)), 0xc9a77c);
     }
+    for (const h of wing.haunches) {
+      const shape: [number, number][] = h.corners.map((c) => {
+        const p = toAxis(model, c);
+        return [p.s, p.t];
+      });
+      const zBottom = h.zBottomEl;
+      const height = h.zTopEl - h.zBottomEl;
+      if (height > 0) add('haunches', prism(shape, height, new THREE.Vector3(0, zBottom, 0), ex, ez, ey), 0xc9a77c);
+    }
   }
 
   // 지형: when the ground model's terrain grid covers the abutment footprint, the terrain is drawn (the same frame as the