- Moved sidebar from left to right for proper RTL layout
- Added full customization panel at /branding with 20 live UI preferences:
  sidebar width, font size, card style, animation speed, accent color,
  table density, toast position, content width, sidebar style, border radius,
  time format, number format, reduce motion, high contrast, color blind modes,
  focus mode, sounds, auto save, page transitions, compact header
- All preferences persist in localStorage and apply instantly
- Added customization.css + customization.js engine
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>