Merge remote-tracking branch 'origin/sub_laptop_3' into main_laptop_1

# Conflicts:
#	B09_Estimation/B09_Estimation_UI_Page.css
#	B09_Estimation/B09_Estimation_UI_Shell.ts
#	B09_Estimation/B09_Estimation_UI_Tabs_Bill_Edit.ts

B09_Estimation/B09_Estimation_UI_Shell.ts

@@ -49,7 +49,7 @@ import {
   buildMaterial,
 } from "./B09_Estimation_UI_Tabs_Base";
 import { buildBill } from "./B09_Estimation_UI_Tabs_Bill";
-import { attachRowMenu, type BillTable } from "./B09_Estimation_UI_Tabs_Bill_Edit";
+import { attachRowMenu, openMenuAt, type BillTable } from "./B09_Estimation_UI_Tabs_Bill_Edit";
 import {
   buildSumExpense,
   buildSumLabor,
@@ -206,6 +206,7 @@ export function renderB09Estimation(root: HTMLElement): void {
         rowClass: extra
           ? (i) => [spec.rowClass?.(i), extra(i)].filter(Boolean).join(" ") || null
           : spec.rowClass,
+        cellClass: spec.cellClass,
         onCellClick: (i, key) => {
           if (spec.onCell) spec.onCell(i, key);
           if (spec.link && !spec.editable?.(i, key)) goto(spec.link(i, key));
@@ -215,6 +216,17 @@ export function renderB09Estimation(root: HTMLElement): void {
       // 166-2 줄 우클릭 메뉴(설계내역서) — 공용 표는 그대로 · 표 root 에 붙임
       const menu = (spec as BillTable).menu;
       if (menu) attachRowMenu(made.root, menu);
+      // 183-3 칸 고르기 메뉴 — 누른 칸 아래에 B09 공용 메뉴
+      if (spec.choices)
+        made.root.addEventListener("click", (event) => {
+          const cell = (event.target as Element).closest<HTMLTableCellElement>("tr[data-i] td");
+          const column = cell ? spec.columns[cell.cellIndex] : undefined;
+          const items =
+            cell && column && spec.choices?.(Number(cell.parentElement?.dataset.i), column.key);
+          if (!cell || !items?.length) return;
+          const box = cell.getBoundingClientRect();
+          openMenuAt(box.left, box.bottom, items);
+        });
       // 157-3 칸 풍선 — 공용 표는 그대로 · 올린 칸에 title
       if (spec.tip)
         made.root.addEventListener("mouseover", (event) => {