- BrandingSettings Livewire component with file uploads (logo, dark logo,
  favicon, signature, login background, invoice header)
- Color picker for primary/secondary/accent/sidebar/status colors with
  live preview panel and preset palettes
- Typography settings (Arabic/English font, base font size)
- Invoice/receipt footer text and terms & conditions
- Display toggles (logo in sidebar, logo in invoice, signature, compact mode)
- CSS variables injected into app layout that drive sidebar, buttons, etc.
- Sidebar now uses --brand-sidebar-bg/text/active variables
- Logo displays in sidebar when uploaded
- SystemSettingsSeeder populates all 6 groups with 50+ settings
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>