[Preview] We should match the title of the entry and the title in the preview
## Bug report

### Required System information

- Edition: Community
- OS: Mac
- Environment: Local

### Describe the bug

When opening the preview of an entry untitled, we should display “untitled”

### Steps to reproduce the behavior

1. Go to an entry untitled
2. Open the preview
3. See that nothing is displayed

### Expected behavior

We should display “Untitled”

### Screenshots

https://github.com/user-attachments/assets/5e36c133-0f19-4221-bf6a-1405b1a4c8ae



