修复仲裁退款并新增免押额度

backend/internal/modules/adminuser/service.go

@@ -41,3 +41,13 @@ func (s *Service) Unfreeze(adminID uint64, userID uint64, meta AuditMeta) (*User
 	}
 	return s.repo.Unfreeze(adminID, userID, meta)
 }
+
+func (s *Service) SetDepositFreeQuota(adminID uint64, userID uint64, req DepositFreeQuotaRequest, meta AuditMeta) (*UserDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if userID == 0 || req.Amount < 0 {
+		return nil, ErrInvalidUser
+	}
+	return s.repo.SetDepositFreeQuota(adminID, userID, req, meta)
+}