Fix Slate crash after inserting emoji from picker/autocomplete

src/app/components/editor/Elements.tsx

@@ -82,13 +82,21 @@ function RenderEmoticonElement({
   const selected = useSelected();
   const focused = useFocused();
 
+  // Void inline: attributes + contentEditable={false} on the same root, children
+  // as a sibling of the visual (not nested inside another non-editable span).
+  // Nesting {children} under an inner contentEditable={false} breaks Slate's
+  // DOM↔node map and crashes ReactEditor.focus after insert.
   return (
-    <span className={css.EmoticonBase} {...attributes}>
+    <span
+      {...attributes}
+      contentEditable={false}
+      className={css.EmoticonBase}
+      style={{ userSelect: 'none' }}
+    >
       <span
         className={css.Emoticon({
           focus: selected && focused,
         })}
-        contentEditable={false}
       >
         {element.key.startsWith('mxc://') ? (
           <img
@@ -99,8 +107,8 @@ function RenderEmoticonElement({
         ) : (
           element.key
         )}
-        {children}
       </span>
+      {children}
     </span>
   );
 }