fix(export): align sns timeline dialog with sns page rendering

src/pages/ExportPage.scss

@@ -2273,6 +2273,14 @@
     padding: 12px 14px 14px;
   }
 
+  .export-session-sns-posts-list {
+    gap: 14px;
+  }
+
+  .post-header-actions {
+    display: none;
+  }
+
   .sns-post-list {
     display: flex;
     flex-direction: column;