feat(rebar): 현장타설 말뚝 · 다주형 코핑 형상과 철근 계산

- 현장타설 기둥·말뚝 형상(cast-in-place-shape)과 주철근·횡철근·커플러 계산(rebar/cast-in-place, cast-layout)
- 다주형 코핑 철근(multicol-coping), 기둥 높이 · 양단부 연장
- 철근표 요약 · 재료 수량 · 3D 뷰 연결과 삽도(cast-rebar-svg)
- 검사 기준 갱신과 회귀 테스트, 검증 스크립트 보관

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

src/core/validate.ts

@@ -3,6 +3,8 @@ import type { Issue, PierInput, PierType } from './types';
 import { validateGround, validatePileEmbedment, validateStrataNValues } from './ground';
 import { integratedCheck } from './bearing-layout';
 import { checkBlockRebar } from './rebar/block-check';
+import { castSettingsIssues } from './rebar/cast-in-place';
+import { castShape, castShapeIssues } from './cast-in-place-shape';
 
 const EXPECTED_COLUMNS: Record<PierType, number> = { 'T형': 1, '2주형': 2, '3주형': 3 };
 
@@ -16,6 +18,13 @@ export const NOT_IMPLEMENTED_RULES = [
 /** Input-level checks (spec §10 E01, E02). Returns false when the pier must not be built. */
 export function validateInput(input: PierInput, issues: Issue[]): boolean {
   let ok = true;
+  if (input.foundationType === '현장타설말뚝') {
+    for (const message of castShapeIssues(input.castInPlaceShape)) issues.push({ code: 'CIP02', level: 'W', pier: input.name, message });
+    const shape = castShape(input);
+    if (shape.casingOn && shape.casingTopEl <= shape.casingBottomEl) issues.push({ code: 'CIP02', level: 'W', pier: input.name, message: '희생강관 상단 EL은 하단 EL보다 높아야 합니다.' });
+    if (shape.weatheredRockEl < shape.bedrockEl) issues.push({ code: 'CIP02', level: 'W', pier: input.name, message: '풍화암 EL이 기반암 EL보다 낮습니다. 암반 입력을 확인하세요.' });
+    for (const message of castSettingsIssues(input.castInPlaceRebar, input.pileLengthMm, input.columnDiameterMm ?? 2000)) issues.push({ code: 'CIP01', level: 'W', pier: input.name, message });
+  }
   if (input.columnCount !== EXPECTED_COLUMNS[input.type]) {
     issues.push({
       code: 'E01',