feat(view): 확대기초·말뚝 plan and side drawings on ② (2단계), drawn from the model

The footing card shows a plan (footing rectangle, pile circles, column, pier axis, mm labels) and an elevation (footing,
piles to their tips, column, h1 and pile length). The drawings are SVG strings built from the model, so they follow the
inputs. θ is noted as not yet applied. Tests check the pile count, the mm labels and the width input.

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

src/style.css

@@ -794,3 +794,8 @@ body { background: #eef1f4; font-family: 'Noto Sans KR', system-ui, sans-serif;
 .bearing-ref .table-scroll { overflow-x: auto; margin-bottom: 8px; }
 .bearing-ref table { font-size: 12px; }
 .bearing-ref input.changed-input { border: 2px solid #e8833a; background: #fff6ee; }
+
+/* ② 확대기초·말뚝 그림 (2단계) */
+.footing-drawings { display: grid; gap: 10px; margin-top: 12px; }
+.footing-fig { margin: 0; }
+.footing-fig svg { width: 100%; height: auto; max-height: 260px; background: #ffffff; border: 1px solid #d5dde6; border-radius: 6px; }