fix guided tour for dark mode

frontend/src/app/(dashboard)/agents/config/[agentId]/page.tsx

@@ -83,8 +83,8 @@ const agentConfigTourSteps: Step[] = [
   },
   {
     target: '[data-tour="preview-agent"]',
-    content: 'Test your agent configuration by previewing how it will behave and respond.',
-    title: 'Test Your Agent',
+    content: 'Build and test your agent by previewing how it will behave and respond. Here you can also ask the agent to self-configure',
+    title: 'Build & Test Your Agent',
     placement: 'left',
     disableBeacon: true,
   },

frontend/src/components/agents/agent-preview.tsx

@@ -363,7 +363,7 @@ export const AgentPreview = ({ agent, agentMetadata }: AgentPreviewProps) => {
                   )}
                 </div>
                 <p className='w-[60%] text-2xl mb-3'>Start conversation with <span className='text-primary/80 font-semibold'>{agent.name}</span></p>
-                <p className='w-[70%] text-sm text-muted-foreground/60'>Test your agent's configuration and chat back and forth to see how it performs with your current settings, tools, and knowledge base.</p>
+                <p className='w-[70%] text-sm text-muted-foreground/60'>Build and test your agent by previewing how it will behave and respond. Here you can also ask the agent to self-configure</p>
               </div>
             }
           />