feat(B07 CAD): 337-4b 다-2 늘이기 · 재기 · 치수 오토캐드 조작 — LENGTHEN · DIVIDE · MEASURE · DIST · DIM 류

- LENGTHEN 새 도구(lengthen-tool.ts) — 측정할 객체 [증분(DE)/퍼센트(P)/전체(T)] <마지막 방식> · 누름 = 현재 길이 알림 · 방식별 값 기억 · 변경할 객체 되풀이 · U = 이 명령 안 바꿈만 · 빈 Enter · Esc 끝 · 선 · 호
- DIVIDE · MEASURE — 기본값 없음 · 정수 2~32767 · 양수 · 블록(B) 없음 안내 · MEASURE 누른 끝부터
- DIST — 오토캐드 꼴 두 줄 기록(거리 · 각도 · 증분) · 다중 점(M) 없음 안내
- DIMLINEAR · DIMALIGNED — 빈 Enter = 객체 선택 · [문자(T)/수평(H)/수직(V)] · 치수 문자 = 기록 · 치수 객체 문자 바꿈 칸(<> = 잰 값)
- DIMCONTINUE · DIMBASELINE — 되풀이 · 명령 취소(U) · 빈 Enter 끝 · DIMRADIUS · DIMDIAMETER [문자(T)] · 그 밖 치수 물음 글
- 시험 measure-acad 11

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014utrjfoW831Vc5wJUd13kL

B07_DesignDetail/openwebcad/src/entities/MeasurementEntity.ts

@@ -51,6 +51,8 @@ export class MeasurementEntity implements Entity {
 	private startPoint: Point;
 	private endPoint: Point;
 	private offsetPoint: Point;
+	/** 치수 문자 바꿈(DIMLINEAR 문자(T)) — `<>` = 잰 값 · 없으면 잰 값 */
+	public textOverride?: string;
 
 	constructor(layerId: string, startPoint: Point, endPoint: Point, offsetPoint: Point) {
 		this.layerId = layerId;
@@ -75,6 +77,17 @@ export class MeasurementEntity implements Entity {
 		this.offsetPoint = point;
 	}
 
+	/** 잰 값(치수 소수 자릿수) */
+	public getMeasuredText(): string {
+		return String(round(pointDistance(this.startPoint, this.endPoint), getDimDecimals()));
+	}
+
+	/** 보이는 치수 문자 */
+	public getLabel(): string {
+		const measured = this.getMeasuredText();
+		return this.textOverride ? this.textOverride.replaceAll('<>', measured) : measured;
+	}
+
 	public getDrawPoints() {
 		// Return if measurement is zero length
 		if (isPointEqual(this.startPoint, this.endPoint)) {
@@ -301,7 +314,7 @@ export class MeasurementEntity implements Entity {
 		drawController.drawLine(offsetStartPointMargin, offsetStartPointExtend);
 		drawController.drawLine(offsetEndPointMargin, offsetEndPointExtend);
 
-		const distance = String(round(pointDistance(this.startPoint, this.endPoint), getDimDecimals()));
+		const distance = this.getLabel();
 		const originalTextDirection = normalUnit.rotate90CW();
 		let finalTextDirection = originalTextDirection;
 		if (
@@ -343,12 +356,14 @@ export class MeasurementEntity implements Entity {
 	}
 
 	public clone(): MeasurementEntity {
-		return new MeasurementEntity(
+		const copy = new MeasurementEntity(
 			getActiveLayerId(),
 			this.startPoint.clone(),
 			this.endPoint.clone(),
 			this.offsetPoint.clone()
 		);
+		copy.textOverride = this.textOverride;
+		return copy;
 	}
 
 	public intersectsWithBox(box: Box): boolean {
@@ -416,7 +431,7 @@ export class MeasurementEntity implements Entity {
 		];
 
 		// Calculate text properties
-		const distance = String(round(pointDistance(this.startPoint, this.endPoint), getDimDecimals()));
+		const distance = this.getLabel();
 		const worldFactor = annotationWorldFactor();
 		const textHeight = getDimTextHeight() / worldFactor;
 		// Estimate width: textString.length * fontSize * aspectRatioFactor
@@ -582,6 +597,7 @@ export class MeasurementEntity implements Entity {
 				startPoint: { x: this.startPoint.x, y: this.startPoint.y },
 				endPoint: { x: this.endPoint.x, y: this.endPoint.y },
 				offsetPoint: { x: this.offsetPoint.x, y: this.offsetPoint.y },
+				...(this.textOverride ? { textOverride: this.textOverride } : {}),
 			},
 		};
 	}
@@ -611,6 +627,7 @@ export class MeasurementEntity implements Entity {
 		measurementEntity.lineColor = jsonEntity.lineColor;
 		measurementEntity.lineWidth = jsonEntity.lineWidth;
 		measurementEntity.lineDash = jsonEntity.lineDash;
+		measurementEntity.textOverride = jsonEntity.shapeData.textOverride;
 		return measurementEntity;
 	}
 }
@@ -619,4 +636,5 @@ export interface MeasurementJsonData {
 	startPoint: { x: number; y: number };
 	endPoint: { x: number; y: number };
 	offsetPoint: { x: number; y: number };
+	textOverride?: string;
 }