What you see in the panel
Select any converted file in the batch list and the preview now includes a heading outline extracted from the Markdown. Collapsed H1/H2/H3 rows make it obvious when a PDF dumped every line as a paragraph or promoted footers into titles.
Why this matters for LLM ingestion
Downstream chunking depends on heading boundaries. Catching a flat or inverted outline in the browser is cheaper than discovering it after embeddings are already written. Download the ZIP only after the outline looks intentional.