fix(M02): CAD 표 놓기 Esc 로 그만두면 면적 쪽 저장 안 한 고침 기다림 풂(104-3)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MgChuAcyBqUkhHMTXomQC7

B07_DesignDetail/openwebcad/src/tools/annotate/place-table-tool.ts

@@ -16,6 +16,13 @@ export function setPendingTable(table: TableEntity | null): void {
 	pending = table;
 }
 
+let onCancelled: (() => void) | null = null;
+
+/** 놓지 않고 Esc 로 끝났을 때 한 번 부를 갈고리(부모에 알림) — 놓으면 버려진다 */
+export function setPlaceCancelHandler(handler: (() => void) | null): void {
+	onCancelled = handler;
+}
+
 export function getPendingTable(): TableEntity | null {
 	return pending;
 }
@@ -40,10 +47,18 @@ export const placeTableToolStateMachine = createSequenceTool({
 	steps: [{ kind: 'point', instructions: '표를 놓을 자리(왼쪽 위)를 누르십시오 · Esc 그만.' }],
 	helpers: true,
 	restart: false,
+	onCancel: () => {
+		if (!pending) return;
+		pending = null;
+		const notify = onCancelled;
+		onCancelled = null;
+		notify?.();
+	},
 	preview: (input) => (pending ? [tableAt(pending, input.cursor, getActiveLayerId())] : []),
 	commit: (input) => {
 		if (!pending) return;
 		addEntities([tableAt(pending, input.point(0), getActiveLayerId())], true);
 		pending = null;
+		onCancelled = null;
 	},
 });