Change UI of Article Layout to Match Outliner UI in Frase, Scalenut or Postspace

The current article layout in neuronrwriter clubs the H2 and H3 of all competitors into a single long list. It makes it difficult to understand the competitor's exact article structure.

Frase, Scalenut and Postspace have a better way to display the list of headings, grouped by competitors.

The layout gives a sense of the structure of headings on each website and headings can be quickly added to create our own content brief.

Here is a video on how Scalenut does it with a more compact UI: https://www.youtube.com/watch?v=ygB2PlFKf-g