- Add fullscreen, loop, and wide mode toggles to watch page
- Add custom SVG icon components for consistent branding
- Update Header, Sidebar, and MobileNav with custom icons
- Add KV-Tube logo component with play button
- Create PWA icon SVGs for favicon and app icons
- Add categorized subscriptions page with Show more/less
- Fix comments display on watch page
- Add thumbnail fallback handling across all pages
- Increase video buffer for smoother playback
- Add visibility change handler for background play
- Update Docker config for v5 deployment
