feat(abut-rebar): ③ 교대 받침블럭 3D 철근 (S1 · S2)

- 받침블럭 배근 경로를 교대 3D 철근에 추가 (선택 · 색 기준 공통), 방위각 회전 반영
- 콘크리트 안 검사에 받침블럭 포함 (다리 묻힘 포함 모두 안)
- 테스트: 블럭 5개 × 8본씩 3조각, 콘크리트 안

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

tests/abut-rebar-inside.test.ts

@@ -9,6 +9,7 @@ import { buildMembers } from '../src/core/abut/members';
 import { buildWings } from '../src/core/abut/wings';
 import { resolveSlab, slabGradePct, slabSection } from '../src/core/abut/slab';
 import { abutSlabGeom, abutSlabRebar } from '../src/core/abut/rebar/slab';
+import { abutBlockRebar } from '../src/core/abut/rebar/block';
 import { abutFootingGeom, abutFootingRebar } from '../src/core/abut/rebar/footing';
 import { skewAngle } from '../src/core/abut/rebar/skew-layout';
 import { abutWallGeom, abutWallRebar } from '../src/core/abut/rebar/wall';
@@ -42,7 +43,9 @@ const res: Record<string, { out: number; total: number }> = {};
   const wingR = wings.map((w) => abutWingRebar(abutWingGeom(model, members, w, footing.z.B68, seats, k)));
   const grade = slabGradePct(slab, model.wing?.slopePct ?? 0);
   const slabG = abutSlabGeom(slab.form, abutPlanOutline(model, members, wings, slab).slab, slabSection(slab, grade, members.shape), { startEl: members.parapetTopStartEl, endEl: members.parapetTopEndEl, L: model.length, bottomEl: members.footingBottomEl! }, [300, 300], slab.lengthMm, grade);
-  const rebar = buildAbutRebar3D(fg, footing, k, members.shape.footingBackM, members.footingBottomEl!, wall, para, wingR, abutSlabRebar(slabG));
+  const blockIn = model.bearings.map((b) => ({ no: b.no, s: b.s, t: model.frontSide * b.lateral, rotDeg: b.rotDeg, seatEl: b.seatEl, blockHeightMm: b.blockHeightMm }));
+  const blockR = abutBlockRebar(blockIn, members.footingBottomEl!);
+  const rebar = buildAbutRebar3D(fg, footing, k, members.shape.footingBackM, members.footingBottomEl!, wall, para, wingR, abutSlabRebar(slabG), blockR);
   const group = buildAbutGroup(model, members, wings);
   group.updateMatrixWorld(true);
   const solids: THREE.Mesh[] = [];

tests/abut-rebar3d.test.ts

@@ -158,3 +158,18 @@ describe('교대 날개벽 3D 철근 (③, 2026-11-04)', () => {
     }
   });
 });
+
+import { abutBlockRebar } from '../src/core/abut/rebar/block';
+
+describe('교대 받침블럭 3D 철근 (③, 2026-11-05)', () => {
+  it('S1 · S2: 블럭 5개 × 8본 = 40본씩, 본마다 다리 · 직선 · 다리 3조각 (120 조각)', () => {
+    const blockR = abutBlockRebar(
+      model.bearings.map((b) => ({ no: b.no, s: b.s, t: model.frontSide * b.lateral, rotDeg: b.rotDeg, seatEl: b.seatEl, blockHeightMm: b.blockHeightMm })),
+      bottom,
+    );
+    const footing = abutFootingRebar(geom);
+    const scene = buildAbutRebar3D(geom, footing, k, back, bottom, undefined, undefined, [], undefined, blockR);
+    expect(scene.byName.get('S1')?.length).toBe(120);
+    expect(scene.byName.get('S2')?.length).toBe(120);
+  });
+});