Show tool execution messages in AI agent chat (#13117)

https://github.com/user-attachments/assets/c0a42726-50ac-496e-a993-9d6076a84a6a

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-step/workflow-version-step.workspace-service.ts

@@ -616,14 +616,16 @@ export class WorkflowVersionStepWorkspaceService {
         };
       }
       case WorkflowActionType.AI_AGENT: {
-        const newAgent = await this.agentService.createOneAgent(
+        const newAgent = await this.agentService.createOneAgentAndFirstThread(
           {
-            name: 'AI Agent Workflow Step',
+            label: 'AI Agent Workflow Step',
+            name: 'ai-agent-workflow',
             description: 'Created automatically for workflow step',
             prompt: '',
-            modelId: 'gpt-4o',
+            modelId: 'auto',
           },
           workspaceId,
+          this.scopedWorkspaceContextFactory.create().userWorkspaceId,
         );
 
         if (!isDefined(newAgent)) {
@@ -636,15 +638,13 @@ export class WorkflowVersionStepWorkspaceService {
         const userWorkspaceId =
           this.scopedWorkspaceContextFactory.create().userWorkspaceId;
 
-        if (!userWorkspaceId) {
-          throw new WorkflowVersionStepException(
-            'User workspace ID not found',
-            WorkflowVersionStepExceptionCode.FAILURE,
+        if (userWorkspaceId) {
+          await this.agentChatService.createThread(
+            newAgent.id,
+            userWorkspaceId,
           );
         }
 
-        await this.agentChatService.createThread(newAgent.id, userWorkspaceId);
-
         return {
           id: newStepId,
           name: 'AI Agent',