feat: 전문의약품(Rx) 사용량 조회 페이지 + OTC 사용량 페이지 추가

- /admin/rx-usage: 전문의약품 사용량 조회 (현재고 포함)
- /admin/usage: OTC 일반약 사용량 조회
- /api/rx-usage: 처방전 데이터 기반 품목별 집계 API
- /api/usage: POS 판매 데이터 기반 품목별 집계 API
- 현재고: IM_total.IM_QT_sale_debit 사용
- 장바구니 + 주문서 생성 기능
- 세로모니터 대응 미디어쿼리 포함

backend/app.py

@@ -3877,6 +3877,336 @@ def api_sales_detail():
         }), 500
 
 
+# ===== 사용량 조회 페이지 및 API =====
+
+@app.route('/admin/usage')
+def admin_usage():
+    """OTC 사용량 조회 · 주문 페이지"""
+    return render_template('admin_usage.html')
+
+
+@app.route('/admin/rx-usage')
+def admin_rx_usage():
+    """전문의약품 사용량 조회 · 주문 페이지"""
+    return render_template('admin_rx_usage.html')
+
+
+@app.route('/api/usage')
+def api_usage():
+    """
+    기간별 품목 사용량 조회 API
+    GET /api/usage?start_date=2026-01-01&end_date=2026-01-31&search=타이레놀&sort=qty_desc
+    """
+    try:
+        start_date = request.args.get('start_date', '')
+        end_date = request.args.get('end_date', '')
+        search = request.args.get('search', '').strip()
+        sort = request.args.get('sort', 'qty_desc')  # qty_desc, qty_asc, name_asc, amount_desc
+        
+        # 날짜 형식 변환 (YYYY-MM-DD -> YYYYMMDD)
+        start_date_fmt = start_date.replace('-', '') if start_date else datetime.now().strftime('%Y%m%d')
+        end_date_fmt = end_date.replace('-', '') if end_date else datetime.now().strftime('%Y%m%d')
+        
+        mssql_session = db_manager.get_session('PM_PRES')
+        
+        # 품목별 사용량 집계 쿼리
+        usage_query = text("""
+            SELECT 
+                S.DrugCode as drug_code,
+                ISNULL(G.GoodsName, '알 수 없음') as product_name,
+                CASE 
+                    WHEN G.SplName IS NOT NULL AND G.SplName != '' THEN G.SplName
+                    WHEN SET_CHK.is_set = 1 THEN '세트상품'
+                    ELSE ''
+                END as supplier,
+                SUM(ISNULL(S.QUAN, 1)) as total_qty,
+                SUM(ISNULL(S.SL_TOTAL_PRICE, 0)) as total_amount,
+                COALESCE(NULLIF(G.BARCODE, ''), U.CD_CD_BARCODE, '') as barcode
+            FROM SALE_SUB S
+            LEFT JOIN PM_DRUG.dbo.CD_GOODS G ON S.DrugCode = G.DrugCode
+            OUTER APPLY (
+                SELECT TOP 1 CD_CD_BARCODE 
+                FROM PM_DRUG.dbo.CD_ITEM_UNIT_MEMBER 
+                WHERE DRUGCODE = S.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+            ) U
+            OUTER APPLY (
+                SELECT TOP 1 1 as is_set
+                FROM PM_DRUG.dbo.CD_item_set 
+                WHERE SetCode = S.DrugCode AND DrugCode = 'SET0000'
+            ) SET_CHK
+            WHERE S.SL_DT_appl >= :start_date
+              AND S.SL_DT_appl <= :end_date
+            GROUP BY S.DrugCode, G.GoodsName, G.SplName, SET_CHK.is_set, G.BARCODE, U.CD_CD_BARCODE
+            ORDER BY SUM(ISNULL(S.QUAN, 1)) DESC
+        """)
+        
+        rows = mssql_session.execute(usage_query, {
+            'start_date': start_date_fmt,
+            'end_date': end_date_fmt
+        }).fetchall()
+        
+        items = []
+        total_qty = 0
+        total_amount = 0
+        
+        for row in rows:
+            drug_code = row.drug_code or ''
+            product_name = row.product_name or ''
+            
+            # 검색 필터
+            if search:
+                search_lower = search.lower()
+                if (search_lower not in product_name.lower() and 
+                    search_lower not in drug_code.lower()):
+                    continue
+            
+            qty = int(row.total_qty or 0)
+            amount = float(row.total_amount or 0)
+            
+            items.append({
+                'drug_code': drug_code,
+                'product_name': product_name,
+                'supplier': row.supplier or '',
+                'barcode': row.barcode or '',
+                'total_qty': qty,
+                'total_amount': int(amount),
+                'thumbnail': None
+            })
+            
+            total_qty += qty
+            total_amount += amount
+        
+        # 정렬
+        if sort == 'qty_asc':
+            items.sort(key=lambda x: x['total_qty'])
+        elif sort == 'qty_desc':
+            items.sort(key=lambda x: x['total_qty'], reverse=True)
+        elif sort == 'name_asc':
+            items.sort(key=lambda x: x['product_name'])
+        elif sort == 'amount_desc':
+            items.sort(key=lambda x: x['total_amount'], reverse=True)
+        
+        # 제품 이미지 조회
+        try:
+            images_db_path = Path(__file__).parent / 'db' / 'product_images.db'
+            if images_db_path.exists():
+                img_conn = sqlite3.connect(str(images_db_path))
+                img_cursor = img_conn.cursor()
+                
+                barcodes = [item['barcode'] for item in items if item['barcode']]
+                drug_codes = [item['drug_code'] for item in items]
+                
+                image_map = {}
+                if barcodes:
+                    placeholders = ','.join(['?' for _ in barcodes])
+                    img_cursor.execute(f'''
+                        SELECT barcode, thumbnail_base64 
+                        FROM product_images 
+                        WHERE barcode IN ({placeholders}) AND thumbnail_base64 IS NOT NULL
+                    ''', barcodes)
+                    for r in img_cursor.fetchall():
+                        image_map[f'bc:{r[0]}'] = r[1]
+                
+                if drug_codes:
+                    placeholders = ','.join(['?' for _ in drug_codes])
+                    img_cursor.execute(f'''
+                        SELECT drug_code, thumbnail_base64 
+                        FROM product_images 
+                        WHERE drug_code IN ({placeholders}) AND thumbnail_base64 IS NOT NULL
+                    ''', drug_codes)
+                    for r in img_cursor.fetchall():
+                        if f'dc:{r[0]}' not in image_map:
+                            image_map[f'dc:{r[0]}'] = r[1]
+                
+                img_conn.close()
+                
+                for item in items:
+                    thumb = image_map.get(f'bc:{item["barcode"]}') or image_map.get(f'dc:{item["drug_code"]}')
+                    if thumb:
+                        item['thumbnail'] = thumb
+        except Exception as img_err:
+            logging.warning(f"제품 이미지 조회 오류: {img_err}")
+        
+        # 기간 일수 계산
+        try:
+            from datetime import datetime as dt
+            start_dt = dt.strptime(start_date_fmt, '%Y%m%d')
+            end_dt = dt.strptime(end_date_fmt, '%Y%m%d')
+            period_days = (end_dt - start_dt).days + 1
+        except:
+            period_days = 1
+        
+        return jsonify({
+            'success': True,
+            'items': items[:500],  # 최대 500건
+            'stats': {
+                'period_days': period_days,
+                'product_count': len(items),
+                'total_qty': total_qty,
+                'total_amount': int(total_amount)
+            }
+        })
+        
+    except Exception as e:
+        logging.error(f"사용량 조회 오류: {e}")
+        return jsonify({
+            'success': False,
+            'error': str(e)
+        }), 500
+
+
+@app.route('/api/rx-usage')
+def api_rx_usage():
+    """
+    전문의약품(처방전) 기간별 사용량 조회 API
+    GET /api/rx-usage?start_date=2026-01-01&end_date=2026-01-31&search=타이레놀&sort=qty_desc
+    """
+    try:
+        start_date = request.args.get('start_date', '')
+        end_date = request.args.get('end_date', '')
+        search = request.args.get('search', '').strip()
+        sort = request.args.get('sort', 'qty_desc')
+        
+        # 날짜 형식 변환 (YYYY-MM-DD -> YYYYMMDD)
+        start_date_fmt = start_date.replace('-', '') if start_date else datetime.now().strftime('%Y%m%d')
+        end_date_fmt = end_date.replace('-', '') if end_date else datetime.now().strftime('%Y%m%d')
+        
+        mssql_session = db_manager.get_session('PM_PRES')
+        
+        # 전문의약품 품목별 사용량 집계 쿼리 (현재고: IM_total.IM_QT_sale_debit)
+        rx_query = text("""
+            SELECT 
+                P.DrugCode as drug_code,
+                ISNULL(G.GoodsName, '알 수 없음') as product_name,
+                ISNULL(G.SplName, '') as supplier,
+                SUM(ISNULL(P.QUAN, 1)) as total_qty,
+                SUM(ISNULL(P.QUAN, 1) * ISNULL(P.Days, 1)) as total_dose,
+                SUM(ISNULL(P.DRUPRICE, 0) * ISNULL(P.QUAN, 1) * ISNULL(P.Days, 1)) as total_amount,
+                COUNT(DISTINCT P.PreSerial) as prescription_count,
+                COALESCE(NULLIF(G.BARCODE, ''), '') as barcode,
+                ISNULL(IT.IM_QT_sale_debit, 0) as current_stock
+            FROM PS_sub_pharm P
+            LEFT JOIN PM_DRUG.dbo.CD_GOODS G ON P.DrugCode = G.DrugCode
+            LEFT JOIN PM_DRUG.dbo.IM_total IT ON P.DrugCode = IT.DrugCode
+            WHERE P.Indate >= :start_date
+              AND P.Indate <= :end_date
+            GROUP BY P.DrugCode, G.GoodsName, G.SplName, G.BARCODE, IT.IM_QT_sale_debit
+            ORDER BY SUM(ISNULL(P.QUAN, 1) * ISNULL(P.Days, 1)) DESC
+        """)
+        
+        rows = mssql_session.execute(rx_query, {
+            'start_date': start_date_fmt,
+            'end_date': end_date_fmt
+        }).fetchall()
+        
+        items = []
+        total_qty = 0
+        total_dose = 0
+        total_amount = 0
+        total_prescriptions = set()
+        
+        for row in rows:
+            drug_code = row.drug_code or ''
+            product_name = row.product_name or ''
+            
+            # 검색 필터
+            if search:
+                search_lower = search.lower()
+                if (search_lower not in product_name.lower() and 
+                    search_lower not in drug_code.lower()):
+                    continue
+            
+            qty = int(row.total_qty or 0)
+            dose = int(row.total_dose or 0)
+            amount = float(row.total_amount or 0)
+            rx_count = int(row.prescription_count or 0)
+            
+            items.append({
+                'drug_code': drug_code,
+                'product_name': product_name,
+                'supplier': row.supplier or '',
+                'barcode': row.barcode or '',
+                'total_qty': qty,
+                'total_dose': dose,  # 총 투약량 (수량 x 일수)
+                'total_amount': int(amount),
+                'prescription_count': rx_count,
+                'current_stock': int(row.current_stock or 0),  # 현재고
+                'thumbnail': None
+            })
+            
+            total_qty += qty
+            total_dose += dose
+            total_amount += amount
+        
+        # 정렬
+        if sort == 'qty_asc':
+            items.sort(key=lambda x: x['total_dose'])
+        elif sort == 'qty_desc':
+            items.sort(key=lambda x: x['total_dose'], reverse=True)
+        elif sort == 'name_asc':
+            items.sort(key=lambda x: x['product_name'])
+        elif sort == 'amount_desc':
+            items.sort(key=lambda x: x['total_amount'], reverse=True)
+        elif sort == 'rx_desc':
+            items.sort(key=lambda x: x['prescription_count'], reverse=True)
+        
+        # 제품 이미지 조회
+        try:
+            images_db_path = Path(__file__).parent / 'db' / 'product_images.db'
+            if images_db_path.exists():
+                img_conn = sqlite3.connect(str(images_db_path))
+                img_cursor = img_conn.cursor()
+                
+                drug_codes = [item['drug_code'] for item in items]
+                
+                image_map = {}
+                if drug_codes:
+                    placeholders = ','.join(['?' for _ in drug_codes])
+                    img_cursor.execute(f'''
+                        SELECT drug_code, thumbnail_base64 
+                        FROM product_images 
+                        WHERE drug_code IN ({placeholders}) AND thumbnail_base64 IS NOT NULL
+                    ''', drug_codes)
+                    for r in img_cursor.fetchall():
+                        image_map[r[0]] = r[1]
+                
+                img_conn.close()
+                
+                for item in items:
+                    if item['drug_code'] in image_map:
+                        item['thumbnail'] = image_map[item['drug_code']]
+        except Exception as img_err:
+            logging.warning(f"제품 이미지 조회 오류: {img_err}")
+        
+        # 기간 일수 계산
+        try:
+            from datetime import datetime as dt
+            start_dt = dt.strptime(start_date_fmt, '%Y%m%d')
+            end_dt = dt.strptime(end_date_fmt, '%Y%m%d')
+            period_days = (end_dt - start_dt).days + 1
+        except:
+            period_days = 1
+        
+        return jsonify({
+            'success': True,
+            'items': items[:500],
+            'stats': {
+                'period_days': period_days,
+                'product_count': len(items),
+                'total_qty': total_qty,
+                'total_dose': total_dose,
+                'total_amount': int(total_amount)
+            }
+        })
+        
+    except Exception as e:
+        logging.error(f"전문의약품 사용량 조회 오류: {e}")
+        return jsonify({
+            'success': False,
+            'error': str(e)
+        }), 500
+
+
 # ===== Claude 상태 API =====
 
 @app.route('/api/claude-status')