第二轮：客服额度资金闭环与收回额度

- 划额度扣商家余额，客服派单/链接只扣个人额度
- 新增 wallet/revoke 收回未使用额度，权限 wallet_revoke
- 客服额度单撤销/退款只释放额度，不再误退商家余额
- 链接待填单(13)可撤销；总管/财务可划收额度

merchant_ops/services/dispatch.py

@@ -98,8 +98,10 @@ def staff_dispatch_order(member, staff_user, data):
     if shangjia.zhuangtai != 1:
         return False, {'code': 403, 'msg': '商家状态异常', 'data': None}
 
-    if jiage > float(shangjia.yue):
-        return False, {'code': 400, 'msg': f'商家余额不足，当前{shangjia.yue}元', 'data': None}
+    try:
+        check_wallet_available(member, jiage)
+    except ValueError as e:
+        return False, {'code': 400, 'msg': str(e), 'data': None}
 
     zhiding_dashou = None
     if zhiding_uid:
@@ -152,7 +154,6 @@ def staff_dispatch_order(member, staff_user, data):
 
             UserShangjia.query.filter(id=shangjia.id).update(
                 fabu=F('fabu') + 1,
-                yue=F('yue') - Decimal(str(jiage)),
                 jinridingdan=F('jinridingdan') + 1,
                 jinriliushui=F('jinriliushui') + Decimal(str(jiage)),
                 jinyuedingdan=F('jinyuedingdan') + 1,