1.0.4-beta.6

Added

• Insert PDF. A new toolbar button beside Insert image: pick a PDF from
  your files or from the vault, then import all its pages or a range such as
  1-3, 5 (in the order you type it). The pages go in after the current
  one, with the PDF as their background, and one undo takes them all out.
  A PDF already in the vault is used as it is, not copied. This replaces
  "Scanned PDF from Files": a PDF from the Files app's Scan Documents goes
  in through Insert PDF now.
• Drag and drop. Drop pictures or a PDF onto a notebook, from your
  computer or from Obsidian's file list. Pictures are placed like Insert
  image; a PDF opens the page choice.
• New notebook from the file explorer. Right-click (long-press on the
  iPad) a folder and choose New notebook to create one there. An optional
  New notebook button beside New note and New folder can be turned on in
  settings.

Changed

• Exported PDFs keep the original PDF. Pages with a PDF background now
  export with the PDF's own text and graphics, sharp and selectable, with
  your writing on top. Other pages export as before.
• Sharper PDFs. PDF pages are drawn at the screen's full resolution, and
  zoomed in past 2.5x the part on screen is drawn again in full detail once
  you stop moving, so small print stays crisp and panning stays smooth. A
  margin around the screen is drawn too, and the last few sharp areas are
  kept, so small moves and going back stay sharp.

Thanks to @Suzkapu for all of the above
(#5).

Fixed

• Writing over a PDF stays smooth while a page is being drawn. Drawing
  a PDF page already paused for the pen, but only if it had not started yet;
  one already under way kept interrupting the ink. It now waits until you
  lift the pen.
• PDF pages no longer go blank while zooming. After a zoom, a PDF page
  showed as empty white paper until it was drawn again at the new size,
  which takes a second or more on an iPad. It now keeps showing the page as
  it was until the sharper version is ready.
• Smoother writing on older iPads. Before iPadOS 26.2, the iPad rounds
  the Pencil's position to a whole screen pixel before Obsidian sees it, so
  lines came out wobbly and loops lumpy. FineNotes now smooths the Pencil's
  path when its positions arrive rounded, as 1.0.1 did. iPads that report
  exact positions draw exactly as before.
  (#1)