abdrhxyii sharpens document review, but ships a dangerous hitchhiker

The useful changes are squarely about keeping a review workspace usable when the documents are messy or numerous:

• Document tracking that keeps uploaded files visible even before table results exist.
• Drag-and-drop uploads and safer deletion that restores a document if removal fails.
• A cleaner collapsible sidebar, more polished tables and loading states, and paginated chat history.

There are also some reliability-minded touches around file conversion and stored files. But the same update includes hidden, obfuscated instructions that run when the backend starts. That is an unacceptable security risk. Anyone interested should inspect the fork on GitHub and selectively extract audited interface improvements only.