3d346e899d
- Add intro/title page before TOC (configurable via intro.enabled in songbook.yaml) - Rotate reference book column headers 90° in TOC to prevent text truncation - Add progress callback to SongbookPipeline.build() with CLI and GUI integration - Make GUI song loading async with spinner indicator - Fix TOC page padding: use actual rendered page count instead of blindly adding tocPages-1 blank pages - Pre-render TOC to measure actual pages needed (TocRenderer.measurePages) - Account for intro pages in pagination offset and page numbering Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>