Header & Navigation Redesign #64

🎯 UX Enhancement: Modern Header & Top Navigation

Description

Redesign the header component with modern UI patterns, improved toggle functionality, and enhanced visual hierarchy.

Current Issues

• Basic toggle button with limited visual feedback
• Minimal header information and branding
• No quick access to key actions
• Generic styling that doesn't reflect Lytics brand

Design Requirements

• Follow Material Design 3.0 principles
• Use Figma design system colors and typography
• Implement proper spacing and visual hierarchy

Technical Notes

• Update TopNavigation.tsx component
• Integrate with theme system
• Ensure accessibility (ARIA labels, keyboard navigation)