- Change background from bg-background to bg-muted/60
- Add border-t-4 border-t-primary shadow-lg card accent
- Add favicon.svg logo above CardTitle
- Add auth.loginSubtitle below title
- Add Google SVG icon and GitHub SVG icon to OAuth buttons
- Add gap-2 to OAuth button className for icon/text spacing
- Add auth.loginSubtitle and auth.registerSubtitle to en.json and de.json
