fix(view): alert [보기] highlights the bar it is about (시안 ③, spec §6.1)

[보기] only switched the member tab. The alert now names its bar (RB-F08 → B2),
and [보기] switches to the member, highlights that row, and scrolls to it.

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

src/core/rebar/summary.ts

@@ -31,6 +31,8 @@ export interface RebarWarning {
   message: string;
   /** Where the alert points: a member tab, or the 공통 설정 (for I02). */
   target: RebarRow['member'] | 'common';
+  /** The bar the alert is about, so that [보기] can highlight its row. */
+  bar?: string;
 }
 
 /** Table metadata per bar (코핑철근.md, 확대기초철근 (1).md, 기둥철근 (1).md, 받침블럭철근.md). */
@@ -154,7 +156,7 @@ export function rebarSummary(model: PierModel, m: Material = DEFAULT_MATERIAL):
       const split = splitPieces(b.length, 25.4, m.fyS, m.fck, STANDARD_BAR);
       if (split) {
         rows.push({ member: 'footing', name: b.name, size: b.size, count: b.count, length: split.pieceLength, note: `${note}, 2조각 이음 (추천안, 겹침 ${Math.round(split.lap)})` });
-        warnings.push({ code: 'RB-F08', message: `${b.name} 길이 ${Math.round(b.length)} mm > 정척 ${STANDARD_BAR} mm: 2조각 이음을 추천안으로 적용 (Q-B6).`, target: 'footing' });
+        warnings.push({ code: 'RB-F08', message: `${b.name} 길이 ${Math.round(b.length)} mm > 정척 ${STANDARD_BAR} mm: 2조각 이음을 추천안으로 적용 (Q-B6).`, target: 'footing', bar: b.name });
       } else {
         rows.push({ member: 'footing', name: b.name, size: b.size, count: b.count, length: b.length, note });
       }