Comprehensive UI improvements with proper button spacing and modern design

- Fix broken Tailwind gap classes by implementing custom CSS spacing system
- Add .form-row and .button-group classes for consistent 16px and 12px spacing
- Replace broken SVG icons with reliable emoji icons throughout application
- Implement comprehensive button system with proper sizing and color coding:
  * btn-success (green) for add/save actions
  * btn-danger (red) for delete actions
  * btn-secondary (glass) for edit/cancel actions
  * btn-sm for smaller buttons with proper proportions

Updated all pages with consistent spacing:
- Header: Fixed navigation button spacing with button-group class
- Teams: Fixed add team form and action button spacing
- Streams: Moved Add Stream button to same line as team dropdown
- Home: Updated edit button styling and spacing
- Edit: Fixed all form buttons with proper spacing and modern icons

Enhanced user experience:
- Professional button hover effects with subtle animations
- Consistent visual hierarchy with proper spacing
- Responsive design maintained across all screen sizes
- Modern glass morphism design with improved accessibility

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/Header.tsx

@@ -26,26 +26,20 @@ export default function Header() {
           </div>
           
           {/* Navigation */}
-          <nav className="flex">
+          <nav className="button-group">
             <Link 
               href="/" 
               className={`btn ${isActive('/') ? 'active' : ''}`}
-              style={{ marginRight: '12px' }}
             >
-              <svg className="icon-sm" fill="currentColor" viewBox="0 0 20 20">
-                <path d="M10.707 2.293a1 1 0 00-1.414 0l-7 7a1 1 0 001.414 1.414L4 10.414V17a1 1 0 001 1h2a1 1 0 001-1v-2a1 1 0 011-1h2a1 1 0 011 1v2a1 1 0 001 1h2a1 1 0 001-1v-6.586l.293.293a1 1 0 001.414-1.414l-7-7z" />
-              </svg>
+              <span className="icon">🏠</span>
               Home
             </Link>
             
             <Link 
               href="/add" 
               className={`btn ${isActive('/add') ? 'active' : ''}`}
-              style={{ marginRight: '12px' }}
             >
-              <svg className="icon-sm" fill="currentColor" viewBox="0 0 20 20">
-                <path fillRule="evenodd" d="M10 3a1 1 0 011 1v5h5a1 1 0 110 2h-5v5a1 1 0 11-2 0v-5H4a1 1 0 110-2h5V4a1 1 0 011-1z" clipRule="evenodd" />
-              </svg>
+              <span className="icon">🎥</span>
               Streams
             </Link>
             
@@ -53,9 +47,7 @@ export default function Header() {
               href="/teams" 
               className={`btn ${isActive('/teams') ? 'active' : ''}`}
             >
-              <svg className="icon-sm" fill="currentColor" viewBox="0 0 20 20">
-                <path d="M13 6a3 3 0 11-6 0 3 3 0 016 0zM18 8a2 2 0 11-4 0 2 2 0 014 0zM14 15a4 4 0 00-8 0v3h8v-3z" />
-              </svg>
+              <span className="icon">👥</span>
               Teams
             </Link>
           </nav>