fix(좌측 카드): 모든 좌측 카드 기본 닫힘 — 공용 카드 · 칸 틀 · 구조물 배치 · B07 묶음 · M02 구조물 집계 양식 (389-3)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QfHKQs7J3hQELKMWQMUJEy

A00_Common/design/design_panel.ts

@@ -75,7 +75,7 @@ export function part<T>(ctx: DesignPanelContext, name: string): T {
 export function createSectionFrame(
   view: DesignView,
   title: string,
-  collapsed = false,
+  collapsed = true,
 ): { root: HTMLElement; body: HTMLElement } {
   const root = document.createElement("section");
   const heading = document.createElement("h3");