Improve drawing symbols and sample popup

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

랜딩페이지/sample-explorer.ts

@@ -6,10 +6,10 @@ import './sample-explorer.css';
 export type Sample=typeof sampleProjects[number];
 export const sampleExplorerMarkup=`<aside class="sample-explorer" aria-label="기설계 교량" data-guide-target="sample">
  <header class="sample-explorer-head"><div><span>EXPLORE PROJECTS</span><h2>교각·교대 설계 라이브러리</h2></div><b>12<span> PROJECTS</span></b></header>
- <section class="sample-map-section"><div class="sample-section-title"><h3>설계 프로젝트 위치</h3><div class="sample-map-modes" role="group" aria-label="지도 종류"><button type="button" data-map-mode="street" aria-pressed="true">일반</button><button type="button" data-map-mode="satellite" aria-pressed="false">위성</button></div></div><div class="sample-map" aria-label="대한민국 기설계 교량 지도"><div class="sample-map-tiles"></div><div class="sample-map-markers"></div><div class="sample-map-zoom"><button type="button" data-zoom="1" aria-label="지도 확대">+</button><button type="button" data-zoom="-1" aria-label="지도 축소">−</button><button type="button" data-zoom="0" aria-label="남한 중심 기본 지도">⌂</button></div><span class="sample-map-attribution"></span><span class="sample-map-error" hidden>배경지도 연결 대기 · 좌표 마커 표시</span></div></section>
+ <section class="sample-map-section"><div class="sample-section-title"><h3>설계 프로젝트 위치</h3><div class="sample-map-modes" role="group" aria-label="지도 종류"><button type="button" data-map-mode="street" aria-pressed="true">일반</button><button type="button" data-map-mode="satellite" aria-pressed="false">위성</button></div></div><div class="sample-map" aria-label="대한민국 기설계 교량 지도"><div class="sample-location"><div class="sample-location-heading"><strong>📍 <span class="sample-location-name"></span> 위치정보</strong></div><p class="sample-address"></p><dl><dt>좌표계</dt><dd class="sample-crs"></dd><dt>조사좌표</dt><dd class="sample-survey"></dd><dt>위도·경도</dt><dd class="sample-wgs84"></dd></dl><small class="sample-coordinate-basis"></small></div><div class="sample-map-tiles"></div><div class="sample-map-markers"></div><div class="sample-map-zoom"><button type="button" data-zoom="1" aria-label="지도 확대">+</button><button type="button" data-zoom="-1" aria-label="지도 축소">−</button><button type="button" data-zoom="0" aria-label="남한 중심 기본 지도">⌂</button></div><span class="sample-map-attribution"></span><span class="sample-map-error" hidden>배경지도 연결 대기 · 좌표 마커 표시</span></div></section>
  <section class="sample-selection" aria-label="선택 교량 상세"><div class="sample-section-title"><h3>하부구조 3D 미리보기</h3><span class="sample-selection-index"></span></div>
  <div class="sample-preview" role="region" aria-label="지도·지반·교각 통합 3D 미리보기"></div>
- <div class="sample-location"><div class="sample-location-heading"><strong>📍 <span class="sample-location-name"></span> 위치정보</strong><button type="button" class="sample-locate" title="선택 교량 위치 확대">지도에서 보기 ↗</button></div><p class="sample-address"></p><dl><dt>좌표계</dt><dd class="sample-crs"></dd><dt>조사좌표</dt><dd class="sample-survey"></dd><dt>위도·경도</dt><dd class="sample-wgs84"></dd></dl><small class="sample-coordinate-basis"></small></div>
+
  </section>
  <section class="sample-list-section"><div class="sample-section-title"><h3>기존 설계 프로젝트</h3><span>총 12개 프로젝트</span></div><div class="sample-list" role="group" aria-label="교량 선택"></div><div class="sample-project-action"><div class="sample-selection-info"><h3></h3><p></p></div><p id="landing-sample-status" role="status" aria-live="polite"></p><button type="button" class="sample-load">설계 프로젝트 불러오기 ↗</button></div></section>
 </aside>`;
@@ -38,7 +38,7 @@ export function createSampleExplorer(root:HTMLElement,load:(sample:Sample)=>Prom
   row.addEventListener('click',()=>select(sample));for(const event of ['pointerenter','focus'])row.addEventListener(event,()=>{row.classList.add('is-hovered');map?.hover(sample.sample);});for(const event of ['pointerleave','blur'])row.addEventListener(event,()=>{row.classList.remove('is-hovered');map?.hover(null);});list.append(row);
  }
  map=createSampleMap(panel,id=>{const sample=sampleProjects.find(s=>s.sample===id);if(sample){select(sample);list.querySelector(`[data-sample-row="${id}"]`)?.scrollIntoView({block:'nearest'});}},()=>selected.sample,()=>busy);
- panel.querySelector('.sample-locate')!.addEventListener('click',()=>map!.focus(selected.sample,true));
+
  button.addEventListener('click',async()=>{
   if(busy)return;const target=selected;busy=true;button.disabled=true;button.textContent=`${target.bridge} 불러오는 중…`;list.querySelectorAll('button').forEach(b=>b.disabled=true);map!.refresh();status.textContent=`${target.bridge}: 실제 프로젝트 파일을 여는 중…`;
   try{await load(target);status.textContent=`${target.bridge}: 교각 ${target.pierCount}기 · 실제 지반/지도 복원 완료`;}