When a Kobo device pushes a last-read-place bookmark, the server now
converts the KEPUB CFI (with koboSpan wrappers) to a standard EPUB CFI
and extracts surrounding text as context_text for use by other devices
(KOReader, web reader) during their pull-side CFI conversions.
Previously the raw KEPUB CFI was stored verbatim as epubcfi, which
meant foliate and CREngine couldn't resolve it (wrong child indices
due to koboSpan wrappers), and no context_text was available for the
text-search fallback in ConvertStandardToCRE.
Changes:
- kepub_cfi_converter.go: Add ExtractedContext field to
KEPUBConversionResult, populated from the already-computed
searchText in both ConvertKEPUBCFIToStandard and
ConvertStandardCFIToKEPUB (exact-match and percentage-fallback
paths).
- kobo.go: Add libraryService field and SetLibraryService setter
(mirrors KOReaderHandler pattern). Add convertKoboCFIToStandard
helper that resolves EPUB+KEPUB paths, instantiates the converter,
and returns the converted CFI + extracted context. The last-read-place
branch in Markup now calls this helper for reflowable formats,
skipping fixed-layout/comic archives (page-index only).
- router.go: Add LibraryService to router Config.
- sync.go: Wire LibraryService to KoboHandler via SetLibraryService.
- main.go: Pass libraryService through router config.
The conversion is purely additive — if no KEPUB file exists on disk
(e.g. side-loaded EPUB without kepubify conversion), the handler
gracefully skips conversion and stores the raw CFI as before.