feat(view): bearing 공통 규칙 inputs (mortar h2, bearing h3, solplate T, margin) and recalculated E, L, W, T1, T2

On the bearing card, four inputs drive E = h1 + h2 + h3 + h4, L = A + margin, W = B + margin and T1/T2 = T ± L·|S|/2. The
defaults are the drawing values, so every row gives back the drawing values; changed rows are marked. The values are screen
state for now and do not change the model or the project file (Q16 stays open).

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

src/style.css

@@ -793,3 +793,4 @@ body { background: #eef1f4; font-family: 'Noto Sans KR', system-ui, sans-serif;
 /* ② 교량받침 reference tables (읽기 전용) */
 .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; }