fix: ai panle layout for queued messages

Author: abose

src/styles/Extn-AIChatPanel.less

@@ -1504,7 +1504,7 @@
     border: 1px dashed rgba(255, 255, 255, 0.15);
     border-radius: 6px;
     padding: 6px 8px;
-    margin: 0 0 4px 0;
+    margin: 0 0 6px 0;
     background-color: rgba(255, 255, 255, 0.04);
 
     .ai-queued-header {