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>

tests/rebar-summary.test.ts

@@ -46,6 +46,7 @@ describe('③ 철근표 요약 (P1)', () => {
   it('B9: 320 bars; warnings: B2 needs a splice (13646 > 12000)', () => {
     expect(count('B9')).toBe(320);
     expect(warnings.map((w) => w.code)).toEqual(['I02', 'RB-F08']); // defaults are assumed values (I02)
+    expect(warnings.find((w) => w.code === 'RB-F08')!.bar).toBe('B2');
     // B2 is split into two pieces (추천안): each piece is about half the 13646 bar plus half the lap.
     expect(rows.find((r) => r.name === 'B2')!.length!).toBeCloseTo(7776, 0);
   });