add pagination approval flows

internal/service/approval_flow_service.go

@@ -173,10 +173,26 @@ func (s *ApprovalFlowServiceImpl) DeleteApprovalFlow(ctx context.Context, id uui
 func (s *ApprovalFlowServiceImpl) ListApprovalFlows(ctx context.Context, req *contract.ListApprovalFlowsRequest) (*contract.ListApprovalFlowsResponse, error) {
 	filter := repository.ListApprovalFlowsFilter{
 		DepartmentID: req.DepartmentID,
+		Search: req.Search,
 		IsActive:     req.IsActive,
 	}
+
+	page := req.Page
+	if page <= 0 {
+		page = 1
+	}
 	
-	flows, total, err := s.flowRepo.List(ctx, filter, req.Limit, req.Offset)
+	limit := req.Limit
+	if limit <= 0 {
+		limit = 10
+	}
+	if limit > 100 {
+		limit = 100 // Max limit to prevent performance issues
+	}
+	
+	offset := (page - 1) * limit
+	
+	flows, total, err := s.flowRepo.List(ctx, filter, limit, offset)
 	if err != nil {
 		return nil, err
 	}