0.16.0

Added

• Delete and remove library entries — two new per-book actions, in the
  book detail view and via right-click on any library card: Remove from
  library (drops it from Midnight Athenaeum, files untouched) and Delete
  book (files too) (also sends its files to the Recycle Bin — never a
  permanent delete). Deleting also clears out that book's progress,
  bookmarks, normalization, online-metadata override, ebook pairing, and
  transcript, so nothing orphaned is left behind. If a book's folder ends up
  completely empty afterward (and only then — a folder shared with other
  books is never touched), the empty folder is removed too.
• Audible .aax decryption — File → Decrypt Audible file (.aax)…
  decrypts one of your own .aax files into a plain .m4b right alongside
  it, using your own Audible activation bytes (entered once via File →
  Set Audible activation bytes…, stored locally, used only to decrypt —
  never sent anywhere). The original .aax is never touched. Adding a
  folder that contains undecrypted Audible files — or running File →
  Rescan library on one already in your library — now also offers to
  decrypt all of them at once. A decrypted book shows a small "AUDIBLE"
  badge on its card.

Fixed

• Library covers could flicker back to a broken-looking state while
  scrolling quickly through a large library, or while a background scan was
  still filling in details — most visible on a big scrollbar drag. Covers
  now load smoothly and consistently regardless of how you're scrolling or
  what's happening in the background.

Changed

• Updated the underlying Electron runtime from 34 to 43, which brings a
  newer Chromium and closes 18 security advisories against the old version —
  including two that applied directly to how this app serves your audio files
  and packages itself. The app now reports no known vulnerable dependencies.
  Playback, scanning, covers, transcription and the library database were all
  re-verified against the new runtime.
• One visible side effect of that update: the "add library folder" and
  "choose ebook" file pickers now open at your Downloads folder rather than
  wherever they opened before. Electron changed the default; the backup and
  data-location dialogs are unaffected because they set their own location.