fix(editor): prevent race condition and ensure correct list continuation on Enter (#4716)

* fix(editor): Prevent race condition and ensure correct list continuation on Enter

_

* fix: always insert newline after preventing default Enter key behavior

web/src/components/MemoEditor/Editor/index.tsx

@@ -169,6 +169,11 @@ const Editor = forwardRef(function Editor(props: Props, ref: React.ForwardedRef<
       if (event.shiftKey || event.ctrlKey || event.metaKey || event.altKey) {
         return;
       }
+      // Prevent a newline from being inserted, so that we can insert it manually later.
+      // This prevents a race condition that occurs between the newline insertion and
+      // inserting the insertText.
+      // Needs to be called before any async call.
+      event.preventDefault();
 
       const cursorPosition = editorActions.getCursorPosition();
       const prevContent = editorActions.getContent().substring(0, cursorPosition);
@@ -205,9 +210,7 @@ const Editor = forwardRef(function Editor(props: Props, ref: React.ForwardedRef<
         insertText += " |";
       }
 
-      if (insertText) {
-        editorActions.insertText(insertText);
-      }
+      editorActions.insertText("\n" + insertText);
     }
   };