Changes:
- MARKET: Re-introduced 'Emerald Glow' background effect (Landing Page style)
- NAVIGATION: Complete redesign of Sidebar to match Award-Winning style
- Darker, cleaner background (zinc-950)
- Ultra-thin borders (white/5)
- New active state: subtle emerald glow line + text color (no blocky backgrounds)
- Simplified Logo section
- Modernized User Profile card