Improve drawing export and foundation quantity views

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/main.ts

@@ -1,5 +1,6 @@
 import './style.css';
 import { createDrawingWorkspace } from '../도면작성/workspace';
+import { createTakeoffWorkspace } from '../수량산출/workspace';
 import * as THREE from 'three';
 import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
 import { swapXYAzimuth } from './core/coordinate-frame';
@@ -170,6 +171,16 @@ const drawingWorkspace = createDrawingWorkspace($('view-drawing'), () => ({
   piers: state.piers.map(p => ({ input: p.input, model: p.model, dirty: pendingKeys(p).length > 0 })),
 }), selectPier);
 
+const quantityRebarTon = new Map<string,number|null>();
+const quantityWorkspace = createTakeoffWorkspace($('view-quantity'), () => ({
+  project: state.project, selected: state.active,
+  piers: state.piers.map(p => ({input:p.input,model:p.model,dirty:pendingKeys(p).length>0,rebarTon:quantityRebarTon.get(p.input.name)})),
+}), selectPier, (name,data) => {
+  const pier=state.piers.find(p=>p.input.name===name);if(!pier)return;
+  pier.input={...pier.input,quantityTakeoff:data};pier.draft={...pier.draft,quantityTakeoff:data};
+  renderSaveStatus();scheduleBackup();
+});
+
 function el<K extends keyof HTMLElementTagNameMap>(tag: K, text?: string, cls?: string): HTMLElementTagNameMap[K] {
   const node = document.createElement(tag);
   if (text !== undefined) node.textContent = text;
@@ -1922,6 +1933,9 @@ function renderQuantityScreen(): void {
   const entries = targets.flatMap((pier) =>
     pier.model ? [{ pier, q: buildQuantity(rebarSummary(pier.model, state.material, state.fckByMember).rows, state.material) }] : [],
   );
+  quantityRebarTon.clear();
+  for(const {pier,q} of entries)quantityRebarTon.set(pier.input.name,q.missing.length?null:q.kg/1000);
+  quantityWorkspace.refresh();
   // 전체 with more than one pier: the bridge total first (교량 전체 집계); the per-pier tables follow.
   if (state.quantityAll && entries.length > 1) body.appendChild(bridgeTotalBlock(aggregateQuantities(entries.map((e) => e.q)), entries.length));
   for (const { pier, q } of entries) {