feat(b08): 구조물도 탭을 수량산출 화면에 붙임

- 구조물 원단위 탭 앞에 「구조물도」 탭 등록(브레인 지정 배선 권한)
- 탭 차례 바꾸기·원단위 흡수는 PLAN 5장 몫이라 손대지 않음

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016VBGFXB9AbJBwXP19z75Qq

B08_Quantity/B08_Quantity_UI_Page.ts

@@ -38,6 +38,7 @@ import {
   renderUnitQuantityGrid,
   type MaterialResponse,
 } from "./B08_Quantity_UI_MaterialGrid";
+import { renderStructureSheets } from "./B08_Quantity_UI_StructureSheet";
 
 /** locale 헬퍼 */
 function L(key: keyof typeof ui_locales): string {
@@ -764,6 +765,7 @@ function buildQuantityBody(
   failed: boolean,
   material: MaterialResponse | null,
   draft: DraftSettings,
+  projectId: string | null,
 ): HTMLElement {
   const body = document.createElement("div");
   body.className = "b08-quantity__body";
@@ -827,6 +829,9 @@ function buildQuantityBody(
           : message(L("B08_Quantity_Grid_Empty"));
       },
     },
+    // 구조물도 — 제원 조합 하나 = 한 장(PLAN 3장). 스스로 받아 오므로 표를 넘기지 않음.
+    //   ⚠ 탭 차례 바꾸기·원단위 탭 흡수는 PLAN 5장 몫 — 여기서는 원단위 앞에 붙이기만 함.
+    { label: L("B08_Quantity_Tab_StructureSheet"), build: () => renderStructureSheets(projectId) },
     {
       label: L("B08_Quantity_Tab_UnitQuantity"),
       build: () =>
@@ -957,7 +962,7 @@ export async function renderB08Quantity(root: HTMLElement): Promise<void> {
     steps: workflowSteps(),
     activeStep: 5,
     leftPanel: buildQuantitySidePanel(projectId, table, draft, reload),
-    mainContent: buildQuantityBody(table, failed, material, draft),
+    mainContent: buildQuantityBody(table, failed, material, draft, projectId),
     stages: workflowState?.stages,
     currentStage: workflowState?.current_stage,
     routes: WORKFLOW_STEP_ROUTES,

ui_template/ui_template_locale_b2.ts

@@ -624,6 +624,7 @@ export const ui_locales_b2 = {
   ],
   B08_Quantity_Tab_Summary: ["토공집계", "Earthwork Summary"],
   B08_Quantity_Tab_Haul: ["운반거리", "Haul Distance"],
+  B08_Quantity_Tab_StructureSheet: ["구조물도", "Structure Sheets"],
   B08_Quantity_Tab_UnitQuantity: ["구조물 원단위", "Structure Unit Quantity"],
   B08_Quantity_Tab_Material: ["자재총괄", "Material Summary"],
   B08_Quantity_Tab_Preparation: ["준비공·사방공", "Preparation & Erosion Control"],