feat(재고): 약품 더블클릭 시 입고이력 모달 추가

- 새 API: GET /api/drugs/<drug_code>/purchase-history
  - WH_sub + WH_main + PM_BASE.CD_custom 조인
  - 도매상명, 입고일, 수량, 단가, 전화번호 반환
- admin_products.html 업데이트:
  - tr ondblclick → openPurchaseModal()
  - 입고이력 모달 UI/스타일 추가
  - 도매상 전화번호 클릭 시 복사 기능
  - 결과 카운트 옆에 더블클릭 힌트 추가
- 기타 onclick에 event.stopPropagation() 추가 (충돌 방지)

backend/templates/admin_products.html

@@ -590,6 +590,135 @@
         .location-modal-btn.primary { background: #f59e0b; color: #fff; }
         .location-modal-btn.primary:hover { background: #d97706; }
 
+        /* ── 입고이력 모달 ── */
+        .purchase-modal {
+            display: none;
+            position: fixed;
+            top: 0; left: 0; right: 0; bottom: 0;
+            background: rgba(0,0,0,0.6);
+            z-index: 2000;
+            align-items: center;
+            justify-content: center;
+            backdrop-filter: blur(4px);
+        }
+        .purchase-modal.show { display: flex; }
+        .purchase-modal-content {
+            background: #fff;
+            border-radius: 16px;
+            padding: 0;
+            max-width: 600px;
+            width: 95%;
+            max-height: 80vh;
+            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+            animation: modalSlideIn 0.2s ease;
+            overflow: hidden;
+            display: flex;
+            flex-direction: column;
+        }
+        .purchase-modal-header {
+            padding: 20px 24px;
+            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
+            color: #fff;
+        }
+        .purchase-modal-header h3 {
+            margin: 0 0 6px 0;
+            font-size: 18px;
+            display: flex;
+            align-items: center;
+            gap: 8px;
+        }
+        .purchase-modal-header .drug-name {
+            font-size: 14px;
+            opacity: 0.9;
+        }
+        .purchase-modal-body {
+            padding: 16px 24px 24px;
+            overflow-y: auto;
+            flex: 1;
+        }
+        .purchase-history-table {
+            width: 100%;
+            border-collapse: collapse;
+        }
+        .purchase-history-table th {
+            background: #f8fafc;
+            padding: 12px 10px;
+            font-size: 12px;
+            font-weight: 600;
+            color: #64748b;
+            text-align: left;
+            border-bottom: 2px solid #e2e8f0;
+            position: sticky;
+            top: 0;
+        }
+        .purchase-history-table td {
+            padding: 14px 10px;
+            font-size: 14px;
+            border-bottom: 1px solid #f1f5f9;
+        }
+        .purchase-history-table tr:hover td {
+            background: #f8fafc;
+        }
+        .supplier-name {
+            font-weight: 600;
+            color: #1e293b;
+        }
+        .supplier-tel {
+            font-size: 12px;
+            color: #3b82f6;
+            cursor: pointer;
+        }
+        .supplier-tel:hover {
+            text-decoration: underline;
+        }
+        .purchase-date {
+            color: #64748b;
+            font-family: 'JetBrains Mono', monospace;
+            font-size: 13px;
+        }
+        .purchase-qty {
+            font-weight: 600;
+            color: #10b981;
+        }
+        .purchase-price {
+            color: #6b7280;
+        }
+        .purchase-empty {
+            text-align: center;
+            padding: 40px 20px;
+            color: #94a3b8;
+        }
+        .purchase-empty .icon {
+            font-size: 40px;
+            margin-bottom: 12px;
+        }
+        .purchase-modal-footer {
+            padding: 16px 24px;
+            border-top: 1px solid #e2e8f0;
+            display: flex;
+            justify-content: flex-end;
+        }
+        .purchase-modal-btn {
+            padding: 10px 24px;
+            border: none;
+            border-radius: 8px;
+            cursor: pointer;
+            font-weight: 500;
+            font-size: 14px;
+            background: #f1f5f9;
+            color: #64748b;
+            transition: all 0.15s;
+        }
+        .purchase-modal-btn:hover {
+            background: #e2e8f0;
+        }
+        tbody tr {
+            cursor: pointer;
+        }
+        tbody tr:active {
+            background: #ede9fe;
+        }
+
         /* ── 가격 ── */
         .price {
             font-weight: 600;
@@ -916,6 +1045,7 @@
         <!-- 결과 -->
         <div class="result-count" id="resultCount" style="display:none;">
             검색 결과: <strong id="resultNum">0</strong>건
+            <span style="margin-left: 16px; color: #94a3b8; font-size: 12px;">💡 행 더블클릭 → 입고이력</span>
         </div>
 
         <div class="table-wrap">
@@ -993,6 +1123,34 @@
         </div>
     </div>
 
+    <!-- 입고이력 모달 -->
+    <div class="purchase-modal" id="purchaseModal" onclick="if(event.target===this)closePurchaseModal()">
+        <div class="purchase-modal-content">
+            <div class="purchase-modal-header">
+                <h3>📦 입고 이력</h3>
+                <div class="drug-name" id="purchaseDrugName">-</div>
+            </div>
+            <div class="purchase-modal-body">
+                <table class="purchase-history-table">
+                    <thead>
+                        <tr>
+                            <th>도매상</th>
+                            <th>입고일</th>
+                            <th>수량</th>
+                            <th>단가</th>
+                        </tr>
+                    </thead>
+                    <tbody id="purchaseHistoryBody">
+                        <tr><td colspan="4" class="purchase-empty"><div class="icon">📭</div><p>로딩 중...</p></td></tr>
+                    </tbody>
+                </table>
+            </div>
+            <div class="purchase-modal-footer">
+                <button class="purchase-modal-btn" onclick="closePurchaseModal()">닫기</button>
+            </div>
+        </div>
+    </div>
+
     <script>
     let productsData = [];
     let selectedItem = null;
@@ -1069,17 +1227,17 @@
                 : '';
             
             return `
-            <tr>
+            <tr ondblclick="openPurchaseModal('${item.drug_code}', '${escapeHtml(item.product_name).replace(/'/g, "\\'")}')">
                 <td style="text-align:center;">
                     ${item.thumbnail 
-                        ? `<img src="data:image/jpeg;base64,${item.thumbnail}" class="product-thumb" onclick="openImageModal('${item.barcode || ''}', '${item.drug_code || ''}', '${escapeHtml(item.product_name)}')" alt="">`
-                        : `<div class="product-thumb-placeholder" onclick="openImageModal('${item.barcode || ''}', '${item.drug_code || ''}', '${escapeHtml(item.product_name)}')"><svg viewBox="0 0 24 24"><path d="M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 16H5V5h14v14zm-5-7l-3 3.72L9 13l-3 4h12l-4-5z"/></svg></div>`
+                        ? `<img src="data:image/jpeg;base64,${item.thumbnail}" class="product-thumb" onclick="event.stopPropagation();openImageModal('${item.barcode || ''}', '${item.drug_code || ''}', '${escapeHtml(item.product_name)}')" alt="">`
+                        : `<div class="product-thumb-placeholder" onclick="event.stopPropagation();openImageModal('${item.barcode || ''}', '${item.drug_code || ''}', '${escapeHtml(item.product_name)}')"><svg viewBox="0 0 24 24"><path d="M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 16H5V5h14v14zm-5-7l-3 3.72L9 13l-3 4h12l-4-5z"/></svg></div>`
                     }
                 </td>
                 <td>
                     <div class="product-name">
                         ${escapeHtml(item.product_name)}
-                        ${item.is_animal_drug ? `<span class="animal-badge ${item.apc ? 'clickable' : ''}" ${item.apc ? `onclick="printAnimalDrugInfo('${item.apc}', '${escapeHtml(item.product_name)}')" title="클릭하면 약품 안내서 인쇄"` : 'title="APC 없음"'}>🐾 동물약</span>` : ''}
+                        ${item.is_animal_drug ? `<span class="animal-badge ${item.apc ? 'clickable' : ''}" ${item.apc ? `onclick="event.stopPropagation();printAnimalDrugInfo('${item.apc}', '${escapeHtml(item.product_name)}')" title="클릭하면 약품 안내서 인쇄"` : 'title="APC 없음"'}>🐾 동물약</span>` : ''}
                         ${categoryBadge}
                     </div>
                     <div class="product-supplier ${item.is_set ? 'set' : ''}">${escapeHtml(item.supplier) || ''}</div>
@@ -1092,12 +1250,12 @@
                        <div style="margin-top:4px;">${item.apc ? `<span class="code code-apc">${item.apc}</span>` : `<span class="code code-apc-na">APC미지정</span>`}</div>`
                     : (item.barcode ? `<span class="code code-barcode">${item.barcode}</span>` : `<span class="code code-na">없음</span>`)}</td>
                 <td>${item.location 
-                    ? `<span class="location-badge" onclick="openLocationModal('${item.drug_code}', '${escapeHtml(item.product_name)}', '${escapeHtml(item.location)}')">${escapeHtml(item.location)}</span>` 
-                    : `<span class="location-badge unset" onclick="openLocationModal('${item.drug_code}', '${escapeHtml(item.product_name)}', '')">미지정</span>`}</td>
+                    ? `<span class="location-badge" onclick="event.stopPropagation();openLocationModal('${item.drug_code}', '${escapeHtml(item.product_name)}', '${escapeHtml(item.location)}')">${escapeHtml(item.location)}</span>` 
+                    : `<span class="location-badge unset" onclick="event.stopPropagation();openLocationModal('${item.drug_code}', '${escapeHtml(item.product_name)}', '')">미지정</span>`}</td>
                 <td class="stock ${(item.stock || 0) > 0 ? 'in-stock' : 'out-stock'}">${item.stock || 0}${wsStock}</td>
                 <td class="price">${formatPrice(item.sale_price)}</td>
                 <td>
-                    <button class="btn-qr" onclick="printQR(${idx})">🏷️ QR</button>
+                    <button class="btn-qr" onclick="event.stopPropagation();printQR(${idx})">🏷️ QR</button>
                 </td>
             </tr>
         `}).join('');
@@ -1833,6 +1991,65 @@
     document.getElementById('locationModal')?.addEventListener('click', e => {
         if (e.target.id === 'locationModal') closeLocationModal();
     });
+
+    // ══════════════════════════════════════════════════════════════════
+    // 입고이력 모달
+    // ══════════════════════════════════════════════════════════════════
+    async function openPurchaseModal(drugCode, drugName) {
+        const modal = document.getElementById('purchaseModal');
+        const nameEl = document.getElementById('purchaseDrugName');
+        const tbody = document.getElementById('purchaseHistoryBody');
+        
+        nameEl.textContent = drugName || drugCode;
+        tbody.innerHTML = '<tr><td colspan="4" class="purchase-empty"><div class="icon">⏳</div><p>입고이력 조회 중...</p></td></tr>';
+        modal.classList.add('show');
+        
+        try {
+            const res = await fetch(`/api/drugs/${drugCode}/purchase-history`);
+            const data = await res.json();
+            
+            if (data.success) {
+                if (data.history.length === 0) {
+                    tbody.innerHTML = '<tr><td colspan="4" class="purchase-empty"><div class="icon">📭</div><p>입고 이력이 없습니다</p></td></tr>';
+                } else {
+                    tbody.innerHTML = data.history.map(h => `
+                        <tr>
+                            <td>
+                                <div class="supplier-name">${escapeHtml(h.supplier)}</div>
+                                ${h.supplier_tel ? `<div class="supplier-tel" onclick="copyToClipboard('${h.supplier_tel}')" title="클릭하여 복사">📞 ${h.supplier_tel}</div>` : ''}
+                            </td>
+                            <td class="purchase-date">${h.date}</td>
+                            <td class="purchase-qty">${h.quantity.toLocaleString()}</td>
+                            <td class="purchase-price">${h.unit_price ? formatPrice(h.unit_price) : '-'}</td>
+                        </tr>
+                    `).join('');
+                }
+            } else {
+                tbody.innerHTML = `<tr><td colspan="4" class="purchase-empty"><div class="icon">⚠️</div><p>조회 실패: ${data.error}</p></td></tr>`;
+            }
+        } catch (err) {
+            tbody.innerHTML = `<tr><td colspan="4" class="purchase-empty"><div class="icon">❌</div><p>오류: ${err.message}</p></td></tr>`;
+        }
+    }
+    
+    function closePurchaseModal() {
+        document.getElementById('purchaseModal').classList.remove('show');
+    }
+    
+    function copyToClipboard(text) {
+        navigator.clipboard.writeText(text).then(() => {
+            showToast(`📋 ${text} 복사됨`, 'success');
+        }).catch(() => {
+            // fallback
+            const input = document.createElement('input');
+            input.value = text;
+            document.body.appendChild(input);
+            input.select();
+            document.execCommand('copy');
+            document.body.removeChild(input);
+            showToast(`📋 ${text} 복사됨`, 'success');
+        });
+    }
     </script>
 </body>
 </html>