Axe next dev indicator (#68)

Removes this stupid thing: 

<img width="226" height="65" alt="image"
src="https://github.com/user-attachments/assets/9299c085-ba53-440a-953c-7339146d5a42"
/>


next config does expose a way to reposition it to any corner, but it
doesn't work and idk why

Author: MichaelSun48

agentex-ui/next.config.ts

@@ -10,6 +10,7 @@ const nextConfig: NextConfig = {
       },
     ];
   },
+  devIndicators: false,
 };
 
 export default nextConfig;