An EPUB with Media Overlays already carries its narration, yet the Chapters tab required audio files and the Editions panel offered to request an audiobook the book already had.
List the narration sections of such an EPUB as a read-only chapter list, and count the narration as the audio half when deciding which format is missing. The chapters state gains an optional readAlong flag, so released clients keep working. Editing stays tied to audio files, because an EPUB has no chapter metadata to write.
Ref #2032
Keep books and comic archives under the existing ebook request kind so searches, ownership checks,
format preferences and release profiles agree without changing the API contract. Cover the combined
formats and library access rules with unit and end-to-end tests.
Ref #1748
Link two ordinary requests as companions, filed into one book, with a Both search,
grouped list rows, a tabbed release picker and a book-page request for the missing
format. Retire comic requests, keeping old rows readable. File Book Dock covers by the
field rules with a shape check, and re-pick a moved book's primary by its new library.
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