feat: Implement Jupiter-style trading interface with token selection

- Add 'You're paying' and 'You're receiving' sections with proper token dropdowns
- Implement balance display and MAX button functionality
- Add automatic receiving amount calculation based on paying amount
- Enhance token selector with icons, names, and balance information
- Improve leverage position value calculations and risk warnings
- Update trade execution to use new paying/receiving token structure
- Maintain all existing functionality including stop loss, take profit, and position management

This creates a more intuitive and professional trading interface that matches Jupiter's UX patterns.

app/page.js

@@ -54,6 +54,59 @@ export default function HomePage() {
           </a>
         </div>
       </div>
+
+      {/* Featured: Chart Trading Demo */}
+      <div className="card card-gradient">
+        <div className="flex items-center justify-between mb-6">
+          <div>
+            <h2 className="text-xl font-semibold text-white mb-2">🚀 Professional Chart Trading</h2>
+            <p className="text-gray-400">Advanced trading interface with leverage, charting, and position management</p>
+          </div>
+          <div className="text-right">
+            <span className="inline-block px-3 py-1 bg-yellow-600/20 text-yellow-400 rounded-full text-sm font-medium">NEW</span>
+          </div>
+        </div>
+        
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-6 mb-6">
+          <div className="flex items-center space-x-3">
+            <div className="w-8 h-8 bg-green-500/20 rounded-full flex items-center justify-center">
+              <span className="text-green-400 text-sm">📈</span>
+            </div>
+            <div>
+              <div className="text-white font-medium">Real-time Charts</div>
+              <div className="text-gray-400 text-sm">Professional candlestick visualization</div>
+            </div>
+          </div>
+          
+          <div className="flex items-center space-x-3">
+            <div className="w-8 h-8 bg-yellow-500/20 rounded-full flex items-center justify-center">
+              <span className="text-yellow-400 text-sm">⚡</span>
+            </div>
+            <div>
+              <div className="text-white font-medium">Leverage Trading</div>
+              <div className="text-gray-400 text-sm">1x to 100x leverage options</div>
+            </div>
+          </div>
+          
+          <div className="flex items-center space-x-3">
+            <div className="w-8 h-8 bg-blue-500/20 rounded-full flex items-center justify-center">
+              <span className="text-blue-400 text-sm">🎯</span>
+            </div>
+            <div>
+              <div className="text-white font-medium">Position Management</div>
+              <div className="text-gray-400 text-sm">Stop loss & take profit</div>
+            </div>
+          </div>
+        </div>
+
+        <a 
+          href="/chart-trading-demo" 
+          className="inline-flex items-center px-6 py-3 bg-gradient-to-r from-blue-600 to-purple-600 text-white rounded-lg hover:from-blue-700 hover:to-purple-700 transition-all transform hover:scale-105 font-medium"
+        >
+          <span className="mr-2">🚀</span>
+          Launch Chart Trading Terminal
+        </a>
+      </div>
     </div>
   )
 }