feat(backend): support open api for chat flow run

backend/application/workflow/workflow.go

@@ -255,9 +255,10 @@ func (w *ApplicationService) UpdateWorkflowMeta(ctx context.Context, req *workfl
 	}
 
 	err = GetWorkflowDomainSVC().UpdateMeta(ctx, mustParseInt64(req.GetWorkflowID()), &vo.MetaUpdate{
-		Name:    req.Name,
-		Desc:    req.Desc,
-		IconURI: req.IconURI,
+		Name:         req.Name,
+		Desc:         req.Desc,
+		IconURI:      req.IconURI,
+		WorkflowMode: req.FlowMode,
 	})
 	if err != nil {
 		return nil, err
@@ -4027,3 +4028,62 @@ func (w *ApplicationService) convertChatFlowRole(ctx context.Context, role *enti
 
 	return res, nil
 }
+
+func (w *ApplicationService) OpenAPIGetWorkflowInfo(ctx context.Context, req *workflow.OpenAPIGetWorkflowInfoRequest) (
+	_ *workflow.OpenAPIGetWorkflowInfoResponse, err error) {
+	defer func() {
+		if panicErr := recover(); panicErr != nil {
+			err = safego.NewPanicErr(panicErr, debug.Stack())
+		}
+
+		if err != nil {
+			err = vo.WrapIfNeeded(errno.ErrChatFlowRoleOperationFail, err, errorx.KV("cause", vo.UnwrapRootErr(err).Error()))
+		}
+	}()
+
+	uID := ctxutil.MustGetUIDFromCtx(ctx)
+	wf, err := GetWorkflowDomainSVC().Get(ctx, &vo.GetPolicy{
+		ID:       mustParseInt64(req.GetWorkflowID()),
+		MetaOnly: true,
+	})
+	if err != nil {
+		return nil, err
+	}
+	if err = checkUserSpace(ctx, uID, wf.Meta.SpaceID); err != nil {
+		return nil, err
+	}
+
+	if !IsChatFlow(wf) {
+		logs.CtxWarnf(ctx, "GetChatFlowRole not chat flow, workflowID: %d", wf.ID)
+		return nil, vo.WrapError(errno.ErrChatFlowRoleOperationFail, fmt.Errorf("workflow %d is not a chat flow", wf.ID))
+	}
+
+	var version string
+	if wf.Meta.AppID != nil {
+		version = "" // TODO : search version from DB using AppID
+	}
+
+	role, err := GetWorkflowDomainSVC().GetChatFlowRole(ctx, mustParseInt64(req.WorkflowID), version)
+	if err != nil {
+		return nil, err
+	}
+
+	if role == nil {
+		logs.CtxWarnf(ctx, "GetChatFlowRole role nil, workflowID: %d", wf.ID)
+		// Return nil for the error to align with the production behavior,
+		// where the GET API may be called before the CREATE API during chatflow creation.
+		return &workflow.OpenAPIGetWorkflowInfoResponse{}, nil
+	}
+
+	wfRole, err := w.convertChatFlowRole(ctx, role)
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to get chat flow role config, internal data processing error: %+v", err)
+	}
+
+	return &workflow.OpenAPIGetWorkflowInfoResponse{
+		WorkflowInfo: &workflow.WorkflowInfo{
+			Role: wfRole,
+		},
+	}, nil
+}