bundledBookJSONURLs() was relying solely on
Bundle.urls(forResourcesWithExtension:subdirectory:), the directory-
enumeration API. That API is observed to return empty in some on-device
configurations even when the resource is present, which would cause
seedBooks() to silently no-op and leave BookLibraryView showing "No
Books" despite the JSON being bundled correctly.
Switched to the same pattern textbook seeding uses: explicit per-slug
Bundle.url(forResource:withExtension:) with a bundleURL.appending-
PathComponent fallback. Directory enumeration is kept as a secondary so
future books bundled without code changes still get picked up.
Also added diagnostic prints to refreshBooksDataIfNeeded and the URL
discovery step so device logs reveal what happened if seeding still
falls through.
Bumped bookDataVersion to 3 so existing installs re-trigger
refreshBooksDataIfNeeded → seedBooks on next launch.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Trey T
70d8299df8