Please add the document outline pane that reads PDF's bookmarks/outline to the iOS app.

When I open a PDF in the Proton Drive iOS app, I can't access the document's embedded outline (the bookmark tree / table of contents) that most long PDFs ship with. There's no outline or navigation pane anywhere in the viewer, so the only way to move around a document is to scroll.

This makes long PDFs impractical to read inside Proton Drive. Reference documents, manuals, standards, textbooks, and reports all rely on the outline to jump between sections, and without it I have to scroll through hundreds of pages or export the file to another app just to navigate it.

Thanks!