fix:모달 내 정보보기 버튼 JS 함수 미정의 오류 수정

AJAX 로드 모달에서 script 태그가 실행되지 않는 문제 해결
- 별도 함수 대신 onclick 인라인으로 토글 로직 직접 처리

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/views/sales/admin-prospects/partials/show-modal.blade.php

@@ -105,7 +105,8 @@
     <div class="bg-emerald-50 rounded-lg p-4 mb-6">
         <div class="flex items-center justify-between mb-3">
             <h3 class="text-sm font-semibold text-emerald-700">계약 및 납입 정보</h3>
-            <button type="button" onclick="toggleContractDetail()"
+            <button type="button"
+                onclick="var p=document.getElementById('contractDetailPanel'),i=document.getElementById('contractDetailIcon'),t=document.getElementById('contractDetailBtnText'),h=p.classList.toggle('hidden');i.style.transform=h?'':'rotate(180deg)';t.textContent=h?'정보보기':'접기';"
                 class="inline-flex items-center gap-1 px-2.5 py-1 text-xs font-medium text-emerald-700 bg-emerald-100 hover:bg-emerald-200 rounded-md transition">
                 <svg id="contractDetailIcon" class="w-3.5 h-3.5 transition-transform" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                     <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
@@ -277,17 +278,6 @@ class="inline-flex items-center gap-1 px-2.5 py-1 text-xs font-medium text-emera
         </div>
     </div>
 
-    <script>
-        function toggleContractDetail() {
-            const panel = document.getElementById('contractDetailPanel');
-            const icon = document.getElementById('contractDetailIcon');
-            const btnText = document.getElementById('contractDetailBtnText');
-            const isHidden = panel.classList.contains('hidden');
-            panel.classList.toggle('hidden');
-            icon.style.transform = isHidden ? 'rotate(180deg)' : '';
-            btnText.textContent = isHidden ? '접기' : '정보보기';
-        }
-    </script>
 
     <!-- 등록 정보 -->
     <div class="text-sm text-gray-500">