feat: POP 시연 준비 — 5개 화면 + 버그 수정 + 재고검증

backend-node/src/controllers/outboundController.ts

@@ -179,6 +179,23 @@ export async function create(req: AuthenticatedRequest, res: Response) {
       const locCode = location_code || item.location_code || null;
       const outQty = Number(item.outbound_qty) || 0;
       if (itemCode && outQty > 0) {
+        // 재고 사전 검증: 부족 시 즉시 에러 (트랜잭션 ROLLBACK)
+        const stockCheck = await client.query(
+          `SELECT COALESCE(CAST(NULLIF(current_qty, '') AS numeric), 0) as cur
+           FROM inventory_stock
+           WHERE company_code = $1 AND item_code = $2
+             AND COALESCE(warehouse_code, '') = COALESCE($3, '')
+             AND COALESCE(location_code, '') = COALESCE($4, '')
+           LIMIT 1`,
+          [companyCode, itemCode, whCode || '', locCode || '']
+        );
+        const currentStock = parseFloat(stockCheck.rows[0]?.cur || '0');
+        if (currentStock < outQty) {
+          throw new Error(
+            `재고 부족: ${item.item_name || itemCode} (창고 ${whCode || '미지정'}) — 현재 재고 ${currentStock}, 요청 출고 ${outQty}`
+          );
+        }
+
         const existingStock = await client.query(
           `SELECT id FROM inventory_stock
            WHERE company_code = $1 AND item_code = $2