Upload a scan bundle, tell the app how to recognize separator pages, and MailScan will cut new PDFs after each separator and list the generated links here in the app.
Leave the separator fields blank if you want to pick a sample first page visually and split anywhere that same first-page pattern appears again.
This first version processes local uploads and stores the split files on the server. The output structure is ready for Dropbox sync once we add OAuth and folder selection.