fix(b06): 횡단 보기 반폭 [적용] = 요청값만 — 교차점 맞춤 폭으로 누를 때마다 재생성하던 옛 줄 지움(173-6)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01F3mdb91125mPoC6tpsQx4P

A00_Common/design/design_view_cross.ts

@@ -35,7 +35,6 @@ import {
   crossSaveParts,
   type SectionPersistContext,
 } from "../../B06_Section/B06_Section_UI_Page_Persist";
-import { maxToeFitHalfWidth } from "../../B06_Section/B06_Section_UI_Cross_Fit";
 import { readStructurePick } from "../../B05_Profile/B05_Profile_UI_Structure_Pick_Session";
 import { NO_SELECTION, PIPE_MATCH_M, selectDesign } from "./design_selection";
 import { readPendingPipes } from "../../B05_Profile/B05_Profile_Api_Pipes_Draft";
@@ -256,11 +255,8 @@ export async function mountCrossView(
    */
   async function applyCrossHalfWidth(): Promise<void> {
     if (!sectionDetail) return;
-    // 교차점이 샘플 밖인 측점이 있으면 그 폭까지 넓힌다(카드가 자동 줌아웃할 지반 확보).
     const requested = crossHalfWidth();
-    const needed = maxToeFitHalfWidth(sectionDetail.cross_sections);
-    const target = Math.max(requested ?? 0, needed);
-    if (target > 0 && !(await ensureSampledWidth(target))) return;
+    if (requested && !(await ensureSampledWidth(requested))) return;
     if (!sectionDetail) return;
     stationControls.applyGlobalWidth(
       requested,