feat(abut-rebar): 교대 흉벽 · 브라켓 배근 삽도 (단면 · 교대축 단면 · P10 다웰 평면)

- 대표 단면(흉벽 높이 = 입력값): P1–P3 · P6 · P7 · P10 선, P4 · P5 점, 두께 · 단 수 치수
- 교대축 단면: 상단 경사와 나란한 P4, P1, 끝면 P11 · P8 · P9
- P10 평면: 슬래브 측면선, 다웰 n개, P3 다리 위치와 비켜 옮긴 다웰
- verify/dump: 흉벽 삽도 덤프

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

verify/dump/abut-parapet-svg.dump.ts

@@ -0,0 +1,40 @@
+// 교대 A1 흉벽 · 브라켓 배근 삽도 3장을 SVG로 저장한다 (PNG 확인: python3 -I ../verify/svg_to_png.py <svg> <png>).
+import { mkdirSync, readFileSync, writeFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import * as XLSX from 'xlsx';
+import { it } from 'vitest';
+import { buildAbut } from '../../src/core/abut/geometry';
+import { parseAbutments, toAbutInput } from '../../src/core/abut/parse';
+import { buildMembers } from '../../src/core/abut/members';
+import { buildWings } from '../../src/core/abut/wings';
+import { resolveSlab } from '../../src/core/abut/slab';
+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';
+import { abutParapetGeom, abutParapetRebar, slabSpanAt } from '../../src/core/abut/rebar/parapet';
+import { abutPlanOutline, abutSkewK } from '../../src/view/abut-scene';
+import { abutParapetDowelSvg, abutParapetElevationSvg, abutParapetSectionSvg } from '../../src/view/abut-parapet-rebar-svg';
+
+it('dump 교대 A1 흉벽 삽도', () => {
+  const out = process.env.DUMP_OUT ?? fileURLToPath(new URL('./out', import.meta.url));
+  mkdirSync(out, { recursive: true });
+  const xlsx = fileURLToPath(new URL('../../../../RAG/운곡교P1입력.xlsx', import.meta.url));
+  const rec = parseAbutments(XLSX.read(readFileSync(xlsx), { type: 'buffer' })).abutments[0];
+  const model = buildAbut(toAbutInput(rec));
+  const members = buildMembers(model, { bottomEl: rec.foundationBottomEl, pileLengthMm: rec.pileLengthMm });
+  const wings = buildWings(model, members);
+  const angle = skewAngle(rec.skewDeg);
+  const footing = abutFootingRebar(abutFootingGeom(model.length, members.shape, angle));
+  const wg = abutWallGeom(model.length, members, angle);
+  const wall = abutWallRebar(wg, footing);
+  const slab = resolveSlab();
+  const tM = ((wg.xb + members.shape.parapetBackM * 1000) / 2) / 1000;
+  const span = slabSpanAt(abutPlanOutline(model, members, wings, slab).slab, tM, abutSkewK(model))!;
+  const ch = (sEnd: number) => (wings.find((w) => w.sEnd === sEnd)?.haunchM ?? 0) * 1000;
+  const g = abutParapetGeom(wg, members.shape, { B: model.wing!.slabWidthMm, a: span.a, b: span.b, nearT: members.shape.parapetBackM * 1000 - slab.parapetGapMm, chamferA: ch(0), chamferB: ch(model.length) });
+  const r = abutParapetRebar(g, wall);
+  const ns = (svg: string) => svg.replace('<svg ', '<svg xmlns="http://www.w3.org/2000/svg" ');
+  writeFileSync(`${out}/parapet-section.svg`, ns(abutParapetSectionSvg(g, r)));
+  writeFileSync(`${out}/parapet-elevation.svg`, ns(abutParapetElevationSvg(g, r)));
+  writeFileSync(`${out}/parapet-dowel.svg`, ns(abutParapetDowelSvg(g, r)));
+});