fix: 盘点草稿已盘数量统计兼容字段名 quantity

inventory-backend/app/api/v1/inbound/stock.py

@@ -329,7 +329,8 @@ def get_drafts():
     # 计算真实的去重"已盘数量"
     counted_items_set = set()
     for draft_item in items:
-        if draft_item.get('qty_actual') is not None:
+        # 兼容判断 quantity 或 qty_actual
+        if draft_item.get('quantity') is not None or draft_item.get('qty_actual') is not None:
             unique_key = f"{draft_item.get('source_table', '')}_{draft_item.get('stock_id', '')}"
             counted_items_set.add(unique_key)
     total_scanned_unique = len(counted_items_set)