fix: 客户折扣不得高于全部用户折扣

wwwroot/discount_setting/save_discount.dspy

@@ -1,5 +1,5 @@
 # Upsert折扣明细：对比old_discount和discount，不同才更新
-# 参数: discountid, productid, discount, old_discount, detail_id(可选)
+# 客户折扣不得高于全部用户折扣
 
 result = {'widgettype': 'Message', 'options': {'title': 'Error', 'message': 'Invalid', 'type': 'error', 'timeout': 3}}
 
@@ -47,6 +47,26 @@ try:
         return result
 
     async with DBPools().sqlorContext(dbname) as sor:
+        # 检查是否客户专属折扣方案：如果是，验证折扣不高于全部用户折扣
+        disc_sql = "SELECT customerid, resellerid FROM discount WHERE id = ${id}$"
+        disc_recs = await sor.sqlExe(disc_sql, {'id': discountid})
+        if disc_recs and disc_recs[0].customerid:
+            # 查找全部用户默认方案的同一产品折扣
+            default_sql = """
+            SELECT dd.discount FROM discount_detail dd
+            JOIN discount d ON dd.discountid = d.id
+            WHERE d.resellerid = ${resellerid}$ AND d.customerid IS NULL
+                AND dd.productid = ${productid}$
+            LIMIT 1
+            """
+            default_recs = await sor.sqlExe(default_sql, {'resellerid': disc_recs[0].resellerid, 'productid': productid})
+            if default_recs and default_recs[0].discount is not None:
+                default_d = float(default_recs[0].discount)
+                customer_d = float(discount_val)
+                if customer_d > default_d:
+                    result = {'widgettype': 'Error', 'options': {'title': '折扣无效', 'message': f'客户折扣({customer_d})不能高于全部用户折扣({default_d})', 'timeout': 5}}
+                    return result
+
         if detail_id:
             await sor.U('discount_detail', {
                 'id': detail_id,