feat(tkuser): 협력업체 완전삭제 기능 추가 (admin 전용)

- 관련 데이터 cascade 삭제 (workers, schedules, checkins, reports, SSO 계정 등)
- 구매 이력 있는 업체는 삭제 차단
- 프론트엔드: 목록/상세에 완전삭제 버튼 + prompt("삭제") 안전장치

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

user-management/web/static/js/tkuser-partners.js

@@ -56,6 +56,7 @@ function renderPartnersListTkuser() {
             ${isAdmin ? `<div class="flex gap-1 ml-2 flex-shrink-0">
                 <button onclick="event.stopPropagation(); openEditPartnerTkuser(${p.id})" class="p-1.5 text-slate-500 hover:text-slate-700 hover:bg-slate-200 rounded" title="수정"><i class="fas fa-pen text-xs"></i></button>
                 ${p.is_active ? `<button onclick="event.stopPropagation(); deactivatePartnerTkuser(${p.id}, '${escHtml(p.company_name).replace(/'/g, "\\'")}')" class="p-1.5 text-red-400 hover:text-red-600 hover:bg-red-100 rounded" title="비활성화"><i class="fas fa-ban text-xs"></i></button>` : ''}
+                <button onclick="event.stopPropagation(); hardDeletePartnerTkuser(${p.id})" class="p-1.5 text-red-300 hover:text-red-600 hover:bg-red-100 rounded" title="완전삭제"><i class="fas fa-trash text-xs"></i></button>
             </div>` : ''}
         </div>`;
     }).join('');
@@ -82,7 +83,10 @@ function renderPartnerDetailTkuser(p) {
     const isAdmin = currentUser && ['admin', 'system'].includes(currentUser.role);
     document.getElementById('partnerDetailTkuser').innerHTML = `
         <div class="bg-white rounded-xl shadow-sm p-5 mb-4">
-            <h3 class="text-lg font-semibold text-gray-800 mb-3">${escHtml(p.company_name)}</h3>
+            <div class="flex items-center justify-between mb-3">
+                <h3 class="text-lg font-semibold text-gray-800">${escHtml(p.company_name)}</h3>
+                ${isAdmin ? `<button onclick="hardDeletePartnerTkuser(${p.id})" class="px-2.5 py-1 text-xs text-red-400 hover:text-red-600 hover:bg-red-50 rounded border border-red-200" title="완전삭제"><i class="fas fa-trash mr-1"></i>완전삭제</button>` : ''}
+            </div>
             <div class="grid grid-cols-2 gap-3 text-sm">
                 <div><span class="text-gray-500">사업자번호:</span> <span class="font-medium">${escHtml(p.business_number) || '-'}</span></div>
                 <div><span class="text-gray-500">대표자:</span> <span class="font-medium">${escHtml(p.representative) || '-'}</span></div>
@@ -121,6 +125,39 @@ function renderPartnerDetailTkuser(p) {
         </div>`;
 }
 
+/* ===== 업체 완전삭제 (admin) ===== */
+async function hardDeletePartnerTkuser(id) {
+    try {
+        const r = await api(`/partners/${id}/delete-info`);
+        const info = r.data;
+        if (info.purchaseRequests > 0 || info.purchases > 0) {
+            alert(`"${info.company_name}" 업체는 구매 이력이 있어 삭제할 수 없습니다.\n(구매요청 ${info.purchaseRequests}건, 구매 ${info.purchases}건)\n\n비활성화를 이용해주세요.`);
+            return;
+        }
+        const lines = [];
+        if (info.workers > 0) lines.push(`작업자 ${info.workers}명`);
+        if (info.schedules > 0) lines.push(`스케줄 ${info.schedules}건`);
+        if (info.checkins > 0) lines.push(`출근기록 ${info.checkins}건`);
+        if (info.reports > 0) lines.push(`작업보고 ${info.reports}건`);
+        if (info.visits > 0) lines.push(`방문기록 ${info.visits}건 (보존, 업체연결 해제)`);
+        if (info.accounts > 0) lines.push(`SSO 계정 ${info.accounts}개`);
+        const summary = lines.length > 0 ? `\n\n삭제될 데이터:\n- ${lines.join('\n- ')}` : '\n\n관련 데이터가 없습니다.';
+        const input = prompt(`"${info.company_name}" 업체를 완전히 삭제합니다.\n이 작업은 되돌릴 수 없습니다.${summary}\n\n계속하려면 "삭제"를 입력하세요:`);
+        if (input !== '삭제') {
+            if (input !== null) showToast('삭제가 취소되었습니다', 'error');
+            return;
+        }
+        await api(`/partners/${id}/permanent`, { method: 'DELETE' });
+        showToast('업체가 완전히 삭제되었습니다');
+        await loadPartnersList();
+        if (selectedPartnerIdTkuser === id) {
+            document.getElementById('partnerDetailTkuser').classList.add('hidden');
+            document.getElementById('partnerEmptyTkuser').classList.remove('hidden');
+            selectedPartnerIdTkuser = null;
+        }
+    } catch (e) { showToast(e.message, 'error'); }
+}
+
 /* ===== 업체 등록 ===== */
 function openAddPartnerTkuser() { document.getElementById('addPartnerModalTkuser').classList.remove('hidden'); }
 function closeAddPartnerTkuser() { document.getElementById('addPartnerModalTkuser').classList.add('hidden'); document.getElementById('addPartnerFormTkuser').reset(); }