feat: 단위바코드 갯수 뱃지 + QR 바코드 우선순위 수정

화면 표시:
- 대표바코드 옆 빨간 뱃지로 단위바코드 갯수 표시 (카톡 스타일)
- APC 없어도 단위바코드 있으면 POS 판매 가능함을 표시

QR 인쇄 우선순위:
1. 대표바코드 (있으면)
2. 단위바코드 첫 번째 (대표 없으면)
3. drug_code (fallback)

쿼리 추가:
- UNIT_FIRST: 단위바코드 첫 번째 (조건 없이)
- UNIT_CNT: 단위바코드 갯수

backend/app.py

@@ -3335,7 +3335,7 @@ def api_products():
         # 제품 검색 쿼리 - 사용약품만 옵션에 따라 JOIN 방식 변경
         if in_stock_only:
             # 최적화된 쿼리: 재고 있는 제품만 (IM_total INNER JOIN)
-            # 대표바코드만 표시 (없으면 빈값), APC는 02로 시작하는 것만
+            # 대표바코드만 표시, 단위바코드 첫번째/갯수, APC(02%)
             products_query = text(f"""
                 SELECT TOP {limit}
                     G.DrugCode as drug_code,
@@ -3348,7 +3348,9 @@ def api_products():
                     G.POS_BOON as pos_boon,
                     IT.IM_QT_sale_debit as stock,
                     ISNULL(POS.CD_NM_sale, '') as location,
-                    APC.CD_CD_BARCODE as apc_code
+                    APC.CD_CD_BARCODE as apc_code,
+                    UNIT_FIRST.CD_CD_BARCODE as unit_barcode,
+                    ISNULL(UNIT_CNT.cnt, 0) as unit_barcode_count
                 FROM CD_GOODS G
                 INNER JOIN IM_total IT ON G.DrugCode = IT.DrugCode AND IT.IM_QT_sale_debit > 0
                 LEFT JOIN CD_item_position POS ON G.DrugCode = POS.DrugCode
@@ -3357,6 +3359,16 @@ def api_products():
                     FROM CD_ITEM_UNIT_MEMBER 
                     WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE LIKE '02%'
                 ) APC
+                OUTER APPLY (
+                    SELECT TOP 1 CD_CD_BARCODE 
+                    FROM CD_ITEM_UNIT_MEMBER 
+                    WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                ) UNIT_FIRST
+                OUTER APPLY (
+                    SELECT COUNT(*) as cnt 
+                    FROM CD_ITEM_UNIT_MEMBER 
+                    WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                ) UNIT_CNT
                 WHERE 1=1
                     {animal_condition}
                     {search_condition}
@@ -3378,7 +3390,9 @@ def api_products():
                         G.POS_BOON as pos_boon,
                         ISNULL(IT.IM_QT_sale_debit, 0) as stock,
                         ISNULL(POS.CD_NM_sale, '') as location,
-                        APC.CD_CD_BARCODE as apc_code
+                        APC.CD_CD_BARCODE as apc_code,
+                        UNIT_FIRST.CD_CD_BARCODE as unit_barcode,
+                        ISNULL(UNIT_CNT.cnt, 0) as unit_barcode_count
                     FROM CD_GOODS G
                     LEFT JOIN IM_total IT ON G.DrugCode = IT.DrugCode
                     LEFT JOIN CD_item_position POS ON G.DrugCode = POS.DrugCode
@@ -3387,6 +3401,16 @@ def api_products():
                         FROM CD_ITEM_UNIT_MEMBER 
                         WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE LIKE '02%'
                     ) APC
+                    OUTER APPLY (
+                        SELECT TOP 1 CD_CD_BARCODE 
+                        FROM CD_ITEM_UNIT_MEMBER 
+                        WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                    ) UNIT_FIRST
+                    OUTER APPLY (
+                        SELECT COUNT(*) as cnt 
+                        FROM CD_ITEM_UNIT_MEMBER 
+                        WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                    ) UNIT_CNT
                     WHERE G.POS_BOON = '010103'
                         {search_condition}
                     ORDER BY G.GoodsName
@@ -3408,7 +3432,9 @@ def api_products():
                         G.POS_BOON as pos_boon,
                         ISNULL(IT.IM_QT_sale_debit, 0) as stock,
                         ISNULL(POS.CD_NM_sale, '') as location,
-                        APC.CD_CD_BARCODE as apc_code
+                        APC.CD_CD_BARCODE as apc_code,
+                        UNIT_FIRST.CD_CD_BARCODE as unit_barcode,
+                        ISNULL(UNIT_CNT.cnt, 0) as unit_barcode_count
                     FROM CD_GOODS G
                     LEFT JOIN IM_total IT ON G.DrugCode = IT.DrugCode
                     LEFT JOIN CD_item_position POS ON G.DrugCode = POS.DrugCode
@@ -3422,6 +3448,16 @@ def api_products():
                         FROM CD_ITEM_UNIT_MEMBER 
                         WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE LIKE '02%'
                     ) APC
+                    OUTER APPLY (
+                        SELECT TOP 1 CD_CD_BARCODE 
+                        FROM CD_ITEM_UNIT_MEMBER 
+                        WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                    ) UNIT_FIRST
+                    OUTER APPLY (
+                        SELECT COUNT(*) as cnt 
+                        FROM CD_ITEM_UNIT_MEMBER 
+                        WHERE DRUGCODE = G.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+                    ) UNIT_CNT
                     WHERE 1=1
                         {search_condition}
                     ORDER BY G.GoodsName
@@ -3456,8 +3492,12 @@ def api_products():
             # APC 코드: 쿼리에서 02%로 조회한 것만 사용 (바코드 대체 X)
             apc_code = getattr(row, 'apc_code', None) or ''
             
-            # PostgreSQL 조회용 APC (분류/도매재고): apc 또는 apc_code 사용
-            pg_apc = apc or apc_code
+            # 단위바코드 (첫 번째, 갯수)
+            unit_barcode = getattr(row, 'unit_barcode', None) or ''
+            unit_barcode_count = getattr(row, 'unit_barcode_count', 0) or 0
+            
+            # PostgreSQL 조회용 APC (분류/도매재고): apc 또는 apc_code 또는 unit_barcode
+            pg_apc = apc or apc_code or unit_barcode
             
             items.append({
                 'drug_code': row.drug_code or '',
@@ -3471,6 +3511,8 @@ def api_products():
                 'stock': int(row.stock) if row.stock else 0,
                 'location': row.location or '',  # 위치
                 'apc': apc_code,  # UI용 APC 코드 (02로 시작하는 것만)
+                'unit_barcode': unit_barcode,  # 단위바코드 첫 번째 (QR용)
+                'unit_barcode_count': int(unit_barcode_count),  # 단위바코드 갯수 (뱃지용)
                 '_pg_apc': pg_apc,  # PostgreSQL 조회용 (내부용)
                 'category': None,  # PostgreSQL에서 lazy fetch
                 'wholesaler_stock': None,