Academic Citation Manager Desktop App Reading Pane

For academic citation manager desktop app reading pane, create a scholarly productivity interface focused on research paper organization. Show a paper library sidebar, PDF reading pane, citation metadata, annotation notes, and bibliography export controls. Include paper library, PDF reading pane, citation metadata, annotation notes, and bibliography export while keeping the product useful for students and researchers. Make the hierarchy easy to scan, with meaningful labels, realistic microcopy, responsive spacing, hover or tap states, and accessible contrast. Add empty, loading, and error states where they would naturally appear, so the interface feels like a complete UI/UX case rather than a single decorative screen.