docs: add 6th screenshot and update readme layout

Author: LeanBitLab

README.md

@@ -34,8 +34,11 @@ This fork adds **optional AI-powered features** using Gemini, Groq, and OpenAI-c
     <td><img src="docs/images/1.png" height="500" alt="Screenshot 1"/></td>
     <td><img src="docs/images/2.png" height="500" alt="Screenshot 2"/></td>
     <td><img src="docs/images/3.png" height="500" alt="Screenshot 3"/></td>
+  </tr>
+  <tr>
     <td><img src="docs/images/4.png" height="500" alt="Screenshot 4"/></td>
     <td><img src="docs/images/5.png" height="500" alt="Screenshot 5"/></td>
+    <td><img src="docs/images/6.png" height="500" alt="Screenshot 6"/></td>
   </tr>
 </table>