fix: Remove "Rendering diagram..." when rendering the diagram

Blinking cursor should be enough of an indication that the model
is working.

Author: dividedmind

packages/navie/src/agents/diagram-agent.ts

@@ -33,7 +33,7 @@ export default class DiagramAgent implements Agent {
     return new MermaidFilter(this.history, this.mermaidFixerService);
   }
 
-  async perform(options: AgentOptions, tokensAvailable: () => number): Promise<AgentResponse> {
+  async perform(options: AgentOptions, tokensAvailable: () => number): Promise<void> {
     const agentPrompt = [DIAGRAM_AGENT_PROMPT];
     // With the /noformat option, the user will explain the desired output format in their message.
     if (options.userOptions.isEnabled('format', true)) {
@@ -50,8 +50,6 @@ export default class DiagramAgent implements Agent {
     );
 
     await this.contextService.searchContext(options, tokensAvailable);
-
-    return { response: 'Rendering diagram...\n', abort: false };
   }
 
   applyQuestionPrompt(question: string): void {

packages/navie/test/agents/diagram-agent.spec.ts

@@ -72,6 +72,6 @@ describe('@diagram agent', () => {
     );
 
     // Verify that the result returned by the perform method is as expected
-    expect(result).toEqual({ response: 'Rendering diagram...\n', abort: false });
+    expect(result).toBeUndefined();
   });
 });