fix(view): solplate reference shows centre T = 30 with the (−) and (+) side thicknesses (taper along the axis)

The solplate tapers along the bridge axis. T is the centre thickness (30), T1 the thickness on the 교각축 직각 (−) side
(38) and T2 on the (+) side (22); T1 + T2 = 2T. The table's T column had shown the (−) side value, so T is now 30 on every
row. A test checks T1 + T2 = 2T.

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

src/core/bearing-ref.ts

@@ -34,9 +34,11 @@ export interface SolplateRefRow {
   s: number;
   L: number;
   W: number;
-  /** 솔플레이트 T (mm). */
+  /** 중심 두께 T (mm). The solplate tapers along the bridge axis. */
   T: number;
+  /** 두께 at the 교각축 직각 (−) side (mm). */
   T1: number;
+  /** 두께 at the 교각축 직각 (+) side (mm). */
   T2: number;
 }
 
@@ -57,19 +59,19 @@ export const BEARING_ELEVATION_REF: BearingRefRow[] = [
 ];
 
 export const SOLPLATE_REF: SolplateRefRow[] = [
-  { no: 1, s: -1.910, L: 800, W: 740, T: 38, T1: 38, T2: 22 },
-  { no: 2, s: -1.907, L: 800, W: 740, T: 38, T1: 38, T2: 22 },
-  { no: 3, s: -1.905, L: 800, W: 890, T: 38, T1: 38, T2: 22 },
-  { no: 4, s: -1.903, L: 800, W: 740, T: 38, T1: 38, T2: 22 },
-  { no: 5, s: -1.901, L: 800, W: 740, T: 38, T1: 38, T2: 22 },
-  { no: 6, s: -1.910, L: 800, W: 640, T: 38, T1: 38, T2: 22 },
-  { no: 7, s: -1.907, L: 800, W: 640, T: 38, T1: 38, T2: 22 },
-  { no: 8, s: -1.905, L: 800, W: 750, T: 38, T1: 38, T2: 22 },
-  { no: 9, s: -1.903, L: 800, W: 640, T: 38, T1: 38, T2: 22 },
-  { no: 10, s: -1.901, L: 800, W: 640, T: 38, T1: 38, T2: 22 },
+  { no: 1, s: -1.910, L: 800, W: 740, T: 30, T1: 38, T2: 22 },
+  { no: 2, s: -1.907, L: 800, W: 740, T: 30, T1: 38, T2: 22 },
+  { no: 3, s: -1.905, L: 800, W: 890, T: 30, T1: 38, T2: 22 },
+  { no: 4, s: -1.903, L: 800, W: 740, T: 30, T1: 38, T2: 22 },
+  { no: 5, s: -1.901, L: 800, W: 740, T: 30, T1: 38, T2: 22 },
+  { no: 6, s: -1.910, L: 800, W: 640, T: 30, T1: 38, T2: 22 },
+  { no: 7, s: -1.907, L: 800, W: 640, T: 30, T1: 38, T2: 22 },
+  { no: 8, s: -1.905, L: 800, W: 750, T: 30, T1: 38, T2: 22 },
+  { no: 9, s: -1.903, L: 800, W: 640, T: 30, T1: 38, T2: 22 },
+  { no: 10, s: -1.901, L: 800, W: 640, T: 30, T1: 38, T2: 22 },
 ];
 
-/** 솔플레이트 T of the 공통 규칙 (30 mm). T1 and T2 are computed from this value, not from the table's T column. */
+/** 중심 두께 T of the 공통 규칙 (30 mm). T1 = T + L·|S|/2 (−측), T2 = T − L·|S|/2 (+측), so T1 + T2 = 2T. */
 export const SOLPLATE_T_RULE = 30;
 
 /** T1 / T2 by the drawing's rule: T ± L·|S|/2, rounded to mm (S in %). */

src/main.ts

@@ -1280,7 +1280,7 @@ function renderBearingRef(box: HTMLDivElement, pier: Pier): void {
   const st = el('table', undefined, 'grid-table rebar-table');
   const sh = el('thead');
   const shr = el('tr');
-  for (const h of ['No', 'S (%)', 'L', 'W', 'T', 'T1', 'T2', '식 검산']) shr.appendChild(el('th', h));
+  for (const h of ['No', 'S (%)', 'L', 'W', 'T (중심)', 'T1 (−측)', 'T2 (+측)', '식 검산']) shr.appendChild(el('th', h));
   sh.appendChild(shr);
   st.appendChild(sh);
   const sb = el('tbody');

tests/bearing-ref.test.ts

@@ -23,6 +23,14 @@ describe('교량받침 reference (도면값, 읽기 전용, 1단계)', () => {
     }
   });
 
+  it('the solplate tapers along the axis: T1 (−측) + T2 (+측) = 2·T, with T = 30 at the centre', () => {
+    for (const r of SOLPLATE_REF) {
+      expect(r.T, `No ${r.no}`).toBe(SOLPLATE_T_RULE);
+      expect(r.T1 + r.T2, `No ${r.no}`).toBe(2 * r.T);
+      expect(r.T1, `No ${r.no}`).toBeGreaterThan(r.T2);
+    }
+  });
+
   it('the drawing EL.X − E sits a constant 0.211 m below the model coping top on all ten bearings (Q16 diagnostic)', () => {
     const m = buildPier(loadP1());
     const back = m.blocks.filter((b) => b.row === '후열');