feat(rebar,view): coping end height h1, taper h2 and Level width as inputs on ② (1단계)

The three values are inputs on the coping card, with the P1 values (1000 · 1500 · 2100) when absent, and they are tracked
like the other shape inputs. The geometry and the coping rebar read them from one CopingGeom: the U heights follow the
closed form (h1 − 2c) + h2·min(x_s, x_L0)/x_L0, which reproduces the P1 values. The side rows are assumed to keep their
position relative to the Level underside (명세 확인 필요). P1 results are unchanged; the full suite passes.

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

src/view/rebar3d.ts

@@ -3,6 +3,7 @@ import type { PierModel } from '../core/geometry';
 import { assemblyEndOffset, assemblyJs, b10Levels, b9Bars, FOOTING_DEFAULTS, gridPositions, grid, layers, legLength, legOffsets, sideDepth } from '../core/rebar/footing';
 import { bottomPiece, MAIN, widthLayout } from '../core/rebar/coping-main';
 import { C14_INSET, c14Bars, CAP, COPING_REBAR, SHEAR_LOOP_STEP, shearBars, shearBarsMulti, shearUHeight, copingSideBars, SIDE_HOOK_LEG, stairBars, undersideAt } from '../core/rebar/coping';
+import { sideRowLevels } from '../core/coping-geom';
 import { columnRebar, COLUMN_P1 } from '../core/rebar/column';
 import { barsAcross, BLOCK_REBAR } from '../core/rebar/bearing-block';
 import { blockFramePoint } from '../core/geometry';
@@ -150,8 +151,8 @@ export function buildRebar3D(m: PierModel, common: Material = DEFAULT_MATERIAL,
     }
     // Bottom bars C7 / C8 (코핑철근.md §5.2–5.3): they follow the sloped underside, 127 above it, with a vertical leg up
     // at each end to the C1 level. Each bar is two pieces spliced at the column centre (overlap l_s). The slope runs x_L0 from each end (T형).
-    const xL0 = L / 2 - COPING_REBAR.levelWidth / 2000;
-    const under = (x: number) => undersideAt(L * 1000, x * 1000, m.endBottom, m.levelBottom);
+    const xL0 = L / 2 - m.copingGeom.levelWidth / 2000;
+    const under = (x: number) => undersideAt(L * 1000, x * 1000, m.endBottom, m.levelBottom, m.copingGeom.levelWidth);
     const lap = bottomPiece(mCoping).ls / 2000;
     xs.forEach((n, j) => {
       const z = (x: number) => under(x) + 0.127;
@@ -169,7 +170,7 @@ export function buildRebar3D(m: PierModel, common: Material = DEFAULT_MATERIAL,
     });
     // Shear loops C9 / C10 / C11 and the gaps between columns: a closed U at each position.
     const colS = m.columns.map((c) => c.s * 1000);
-    const sh = colS.length > 1 ? shearBarsMulti(L * 1000, colS) : { ...shearBars(L * 1000), between: [] as number[] };
+    const sh = colS.length > 1 ? shearBarsMulti(L * 1000, colS, m.copingGeom) : { ...shearBars(L * 1000, undefined, m.copingGeom), between: [] as number[] };
     const loops: [string, number[]][] = [['C9', sh.c9], ['C10', sh.c10], ['C11', sh.c11], ['C9·C11 사이', sh.between]];
     // Each position has three 폐합 (코핑철근.md §4.1): legs at y_i = c + i·s_leg (i = 0 … 5), 폐합 i = legs i and i + 3,
     // 1740 wide. Each 폐합 is a 하부 U (base at the bottom, legs up to the top) and a 상부 삿갓 (top bar, legs down
@@ -181,7 +182,7 @@ export function buildRebar3D(m: PierModel, common: Material = DEFAULT_MATERIAL,
     for (const [name, list] of loops) {
       for (const x of list) {
         const xm = mm(x);
-        const h = shearUHeight(x, L * 1000) / 1000;
+        const h = shearUHeight(x, L * 1000, m.copingGeom) / 1000;
         const bot = top - h;
         const capBot = top - (h - CAP.cover / 1000);
         for (let i = 0; i < 3; i++) {
@@ -203,7 +204,8 @@ export function buildRebar3D(m: PierModel, common: Material = DEFAULT_MATERIAL,
     // and two ㄷ bars: a body across the width at x_w, 25.4 above the row, with legs 1525 inward along the faces.
     const sideFace = B / 2 - 0.127;
     const dSide = NOMINAL_DIAMETER.H25;
-    const side = copingSideBars(L * 1000, 41.288, 42.538);
+    const levels = sideRowLevels(m.levelBottom);
+    const side = copingSideBars(L * 1000, levels.zBottom, levels.zBreak, m.copingGeom);
     for (const [name, rows] of [['C12', side.c12], ['C13', side.c13]] as const) {
       for (const r of rows) {
         const xw = mm(r.xw);
@@ -223,7 +225,7 @@ export function buildRebar3D(m: PierModel, common: Material = DEFAULT_MATERIAL,
     const c14Hook = mm(hookLength('main90', NOMINAL_DIAMETER.H19));
     const c14Na = -B / 2 + mm(C14_INSET);
     const c14Nb = B / 2 - mm(C14_INSET);
-    for (const b of c14Bars(L * 1000, topEl, [...side.c12, ...side.c13], (x) => undersideAt(L * 1000, x, m.endBottom, m.levelBottom))) {
+    for (const b of c14Bars(L * 1000, topEl, [...side.c12, ...side.c13], (x) => undersideAt(L * 1000, x, m.endBottom, m.levelBottom, m.copingGeom.levelWidth))) {
       const xm = mm(b.x);
       addBar('C14', 0, [xm, b.z, c14Na], [xm, b.z, c14Nb], NOMINAL_DIAMETER.H19, COLOR.coping);
       // 연직 발 below the coping underside is left out (코핑철근.md §8).