Add bidirectional annotation/highlight sync between KOReader and Readest:
- Add xpointer0/xpointer1 fields to BookNote and DBBookNote types for
KOReader XPointer positions alongside Readest's CFI format
- Extend transform layer to pass through xpointer fields to/from DB
- Convert CFI→XPointer on push and XPointer→CFI on pull in useNotesSync,
discarding notes that fail conversion
- Support KOReader's text()[K].N indexed text node format in xcfi.ts for
paragraphs with inline elements (e.g. <a> page anchors)
- Generate KOReader-compatible XPointers: text().N for single text nodes,
text()[K].N only when multiple direct text nodes exist
- Skip cfi-inert elements (injected by Readest at runtime) in XPointer
path building and resolution
- Map highlight colors between KOReader and Readest color systems
- Implement KOReader plugin annotation push/pull with deterministic IDs,
auto-sync on document open/close, and UIManager refresh on pull
- Refactor koplugin into focused modules: syncauth, syncconfig,
syncannotations, selfupdate
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
