feat: add pre/post-tax price linkage, hide barcode, and tablet adapt

Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-backend/app/services/inbound/buy_service.py

@@ -138,6 +138,7 @@ class BuyInboundService:
 
                 # 价格信息
                 unit_price=u_price,
+                post_tax_unit_price=float(data.get('post_tax_unit_price') or 0),
                 tax_rate=tax_rate,  # [新增]
                 total_price=in_qty * u_price,
                 currency=data.get('currency', 'CNY'),
@@ -184,6 +185,8 @@ class BuyInboundService:
 
             # [新增] 更新税率
             if 'tax_rate' in data: stock.tax_rate = float(data['tax_rate'])
+            # 更新税后单价
+            if 'post_tax_unit_price' in data: stock.post_tax_unit_price = float(data['post_tax_unit_price'])
 
             if 'in_quantity' in data:
                 diff = float(data['in_quantity']) - float(stock.in_quantity)
@@ -322,4 +325,4 @@ class BuyInboundService:
     @staticmethod
     def get_history_locations(base_id):
         return [r[0] for r in
-                db.session.query(StockBuy.warehouse_location).filter(StockBuy.base_id == base_id).distinct().all()]
+                db.session.query(StockBuy.warehouse_location).filter(StockBuy.base_id == base_id).distinct().all()]