Enhance PDF/EPUB readers with progress tracking and create Android development branch

[Claude]

Improved PDF and EPUB reader UX with real-time progress indicators and established foundation for native Android app development.

PDF Reader Enhancements

• Progress display: Real-time page counter with percentage in topbar (Page 5 of 120 (4%))
• File identification: Document title extracted from filename, displayed with icon
• Loading state: Spinner with feedback during PDF.js initialization
• Performance: Reduced polling interval to 1.5s for more responsive updates
• UI refinements: Enhanced topbar layout with better spacing and mobile responsiveness

// Before: minimal topbar with only close button
<div className="pdf-reader-topbar">
  <button onClick={onClose}>×</button>
</div>

// After: informative header with progress
<div className="pdf-reader-topbar">
  <div className="pdf-reader-info">
    <svg>...</svg>
    <span className="pdf-title">{title}</span>
    {!isLoading && totalPages > 0 && (
      <span className="pdf-page-info">
        Page {currentPage} of {totalPages} ({percentage}%)
      </span>
    )}
  </div>
  <button onClick={onClose}>×</button>
</div>

EPUB Reader Enhancements

• Percentage tracking: CFI-based reading progress displayed in topbar ((45%))
• Location generation: Automatic 1600-character interval indexing for accurate progress calculation
• Persistence: Enhanced progress saving with precise percentage values
• Performance: Progress updates only when locations are available to avoid stuttering

Key change in location tracking:

const handleGetRendition = useCallback((rendition: Rendition) => {
  const book = rendition.book as any;
  if (book && !book.locations?.length) {
    book.locations.generate(1600).then(() => {
      const percentage = Math.round(book.locations.percentageFromCfi(location) * 100);
      setReadingPercentage(percentage);
    });
  }
}, [location]);

Android Development Branch

Created booky-android branch with development infrastructure:

• ANDROID_SETUP.md: Comprehensive roadmap covering technology stack (Kotlin, Jetpack Compose, MVVM), project structure, and Q2-Q4 2026 timeline
• android/ directory: Placeholder structure with README and proper .gitignore
• Feature planning: 3-phase roadmap (Core → Advanced → Mobile-Specific) documented

Branch establishes foundation for native Android implementation while maintaining web version parity.

Original prompt

improve the pdf reader and epub
make another branch for booky android