feat(ground): pile-tip embedment check and soil layers from the ground model

- ground.ts: G04 when a pile tip is above the 연암 상면 minus 1.0 × D; G05
  (info) when layers are entered but there is no 연암 row. No message while
  no layers are entered at all.
- ground-model.ts: reads the Python soil.layers as strata rows; the project
  file keeps and checks them.
- ② card: a button fills the layer rows from the ground model for the pier.

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

src/main.ts

@@ -16,7 +16,7 @@ import { buildRebar3D, type RebarColorMode, type RebarScene } from './view/rebar
 import { DEFAULT_MATERIAL, FCK_MEMBERS, fyOf, GRADE_CHOICES, isAssumedMaterial, materialFrom, type BendFactors, type FckByMember, type FckMember, type GradeKey, type Material } from './core/rebar/common';
 import { buildQuantity, quantityRows, type Quantity, type QuantityLine } from './core/rebar/quantity';
 import { parseDrawingRows } from './core/drawing-import';
-import { groundElFor, parseGroundModel, type GroundModelFile } from './core/ground-model';
+import { groundElFor, parseGroundModel, strataRowsFor, type GroundModelFile } from './core/ground-model';
 import { GROUND_POSITIONS, STRATA_NAMES } from './core/ground';
 import { groundSectionSvg } from './view/ground-svg';
 import { parseBearingElevationTable, parseSolplateTable, readDxfTexts } from './core/dxf-table';
@@ -1631,6 +1631,18 @@ function renderGroundModel(box: HTMLDivElement, pier: Pier): void {
     setStrataRows(name, [...rows, { name: next, bottomEl: Number(((last?.bottomEl ?? d.groundEl) - 2).toFixed(3)) }]);
   });
   wrap.appendChild(add);
+  // 지반 모델의 지층 기둥 (Python, 시추 자료가 있을 때): one click fills the rows (승인 2026-10-26).
+  if (groundModel) {
+    const modelRows = strataRowsFor(groundModel, name);
+    if (modelRows) {
+      const fromModel = el('button', `지반 모델의 지층 ${modelRows.length}개 불러오기`, 'btn small');
+      fromModel.type = 'button';
+      fromModel.addEventListener('click', () => setStrataRows(name, modelRows.map((r) => ({ ...r }))));
+      wrap.appendChild(fromModel);
+    } else {
+      wrap.appendChild(el('p', '지반 모델에 이 교각의 지층이 없습니다 (시추 자료가 있으면 만들어집니다).', 'muted small'));
+    }
+  }
 
   // 단면 (삽도): the footings and piles are the generated model; the layers and water level are the inputs.
   if (pier.model) {