v0.2.1: UI Overhaul and Bug Fixes

What's Changed

🎨 UI Overhaul

• Complete UI redesign with colors and better formatting using lipgloss
• Beautiful color scheme with teal, pink, orange accents
• Icons throughout (✉️ 📅 👤 ⚙️ etc.)
• Improved visual hierarchy with styled badges and boxes
• Better contrast for selected items

🐛 Bug Fixes

• Fixed contact edit crash (nil error wrapping)
• Fixed contact update 403 error (now preserves existing vCard fields)
• Fixed contact list scrolling
• Fixed contact search filtering

✨ Improvements

• Added error message wrapping for better readability
• Contacts now auto-refresh when entering view
• Increased contacts limit from 100 to 500
• Added unread count badges to mailboxes
• Improved calendar event display with date headers and time badges