feat(drug-usage): 환자 뱃지 + limit 5000 + 현재고 IM_total

- 조제목록에 환자 뱃지 표시 (3명 이하: 전체, 3명 초과: 최근 3명 + 외 N명)
- API에 unique_patients, recent_patients 필드 추가
- limit 1000 → 5000 증가
- 현재고: 계산 방식 → IM_total.IM_QT_sale_debit (실제 DB 값)

backend/app.py

@@ -8786,14 +8786,17 @@ def api_drug_usage():
             rx_info = rx_data.get(code, {})
             import_info = import_data.get(code, {})
             
+            import_qty = import_info.get('import_total_qty', 0)
+            rx_qty = rx_info.get('rx_total_qty', 0)
             item = {
                 'drug_code': code,
                 'goods_name': rx_info.get('goods_name', ''),
                 'category': rx_info.get('category', ''),
                 'rx_count': rx_info.get('rx_count', 0),
-                'rx_total_qty': rx_info.get('rx_total_qty', 0),
+                'rx_total_qty': rx_qty,
                 'import_count': import_info.get('import_count', 0),
-                'import_total_qty': import_info.get('import_total_qty', 0)
+                'import_total_qty': import_qty,
+                'current_stock': 0  # IM_total에서 나중에 채움
             }
             
             # 약품명이 없으면 (입고만 있는 경우) PM_DRUG에서 조회
@@ -8807,6 +8810,20 @@ def api_drug_usage():
             
             items.append(item)
         
+        # IM_total에서 현재 재고 조회
+        if items:
+            drug_codes = [item['drug_code'] for item in items]
+            placeholders = ','.join([f"'{c}'" for c in drug_codes])
+            stock_result = drug_session.execute(text(f"""
+                SELECT DrugCode, IM_QT_sale_debit 
+                FROM IM_total 
+                WHERE DrugCode IN ({placeholders})
+            """))
+            stock_map = {row.DrugCode: float(row.IM_QT_sale_debit) if row.IM_QT_sale_debit else 0 
+                        for row in stock_result}
+            for item in items:
+                item['current_stock'] = stock_map.get(item['drug_code'], 0)
+        
         # 조제 건수 기준 정렬
         items.sort(key=lambda x: x['rx_count'], reverse=True)
         
@@ -8915,14 +8932,25 @@ def api_drug_usage_prescriptions(drug_code):
         """), {'drug_code': drug_code, 'start_date': start_date, 'end_date': end_date})
         
         items = []
+        seen_patients = set()
+        recent_patients = []  # 최근 조제받은 환자 (중복 제외, 최대 3명)
+        
         for row in result:
             dosage = float(row.dosage) if row.dosage else 0
             freq = float(row.frequency) if row.frequency else 0
             days = int(row.days) if row.days else 0
+            patient = row.patient_name or ''
+            
+            # 중복 제외 환자 목록 (최근순, 최대 3명)
+            if patient and patient not in seen_patients:
+                seen_patients.add(patient)
+                if len(recent_patients) < 3:
+                    recent_patients.append(patient)
+            
             items.append({
                 'rx_date': row.rx_date or '',
                 'expiry_date': row.expiry_date or '',
-                'patient_name': row.patient_name or '',
+                'patient_name': patient,
                 'institution_name': row.institution_name or '',
                 'dosage': dosage,
                 'frequency': freq,
@@ -8934,6 +8962,8 @@ def api_drug_usage_prescriptions(drug_code):
             'success': True,
             'drug_code': drug_code,
             'total_count': len(items),
+            'unique_patients': len(seen_patients),
+            'recent_patients': recent_patients,
             'items': items
         })
     except Exception as e: