fix: normalize brand whitespace on product writes

routes/products.py

@@ -504,6 +504,9 @@ def product_batch_update():
     for field, value in fields.items():
         if field not in allowed_fields:
             continue
+        # 品牌来自表格/剪贴板时可能带有尾部 Tab 或换行；只清理首尾空白，保留名称中的正常空格。
+        if field == 'brand' and isinstance(value, str):
+            value = value.strip()
         if value == '' or value is None:
             value = None
         # 数值字段范围校验
@@ -1105,7 +1108,7 @@ def product_create():
             VALUES (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)
         """, (
             product_code, product_name,
-            data.get('brand', ''), data.get('product_type', '成品'),
+            (data.get('brand') or '').strip(), (data.get('product_type') or '成品').strip(),
             int(data.get('lead_time', 0)), min(int(data.get('logistics_time', 0)), 999),
             data.get('supplier_code', ''), data.get('supplier_name', ''),
             data.get('procurement_follower', ''), data.get('procurement_planner', ''),