fix(sheet): 머리 칸 / 로 층 나눔 · 줄 머리 칸 고정 · 줄 머리 칸 폭 자동 (M02 재검증)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Tjoit7rxvpLMM7cafeVTo1

ui_template/sheet/ui_template_sheet_render.ts

@@ -9,7 +9,7 @@
 
 import { el } from "@ui/ui_template_elements";
 import { headDepth, layoutHead } from "./ui_template_sheet_header";
-import { columnNames, formulaLabel, headMinWidths } from "./ui_template_sheet_labels";
+import { columnNames, formulaLabel, headMinWidths, textWidth } from "./ui_template_sheet_labels";
 import {
   cellEditable,
   isBoundColumn,
@@ -24,7 +24,8 @@ import type { SheetColumn, SheetDoc, SheetResult, SheetRow } from "./ui_template
 
 export const KEY_UNIT = "s:unit";
 const MASTER_ROWS = ["s:formula", "s:desc", "s:price"] as const;
-const GUTTER = 64;
+const GUTTER_MIN = 64;
+const GUTTER_MAX = 140;
 const DEFAULT_WIDTH = { 수: 72, 글: 96 };
 
 export interface RenderState {
@@ -85,7 +86,23 @@ export function renderSheet(state: RenderState): HTMLElement {
   const depth = headDepth(cols, doc.층);
   const head = layoutHead(cols, depth);
   const names = columnNames(cols);
-  const mins = headMinWidths(cols, depth, headFont());
+  const font = headFont();
+  const mins = headMinWidths(cols, depth, font);
+  // 줄 머리 칸 폭 — 층 이름 · 단위 · 식 · 들어갈 것 · 일위대가 · 합계 이름이 안 잘리게
+  const GUTTER = Math.min(
+    GUTTER_MAX,
+    Math.max(
+      GUTTER_MIN,
+      ...[
+        ...(doc.층 ?? []),
+        st("Row_Unit"),
+        st("Row_Formula"),
+        st("Row_Desc"),
+        st("Row_Unit_Price"),
+        ...(doc.합계줄 ?? []).map((t) => t.이름),
+      ].map((label) => Math.ceil(textWidth(label, font)) + 16),
+    ),
+  );
   const errors = new Map(state.result.오류.map((e) => [`d:${e.줄}|${e.열}`, e.까닭]));
   for (const e of state.result.오류) errors.set(`t:${e.줄}|${e.열}`, e.까닭);
   const frozen = Math.min(doc.보기?.틀고정?.열 ?? 0, cols.length);