Fix spot trade logic: remove incorrect positions and enhance trade history display

- Remove incorrect open positions for spot swaps (instant settlements)
- Add DELETE API route for position removal (/api/trading/positions/[positionId])
- Update existing SOL/USDC trade to clearly mark as SPOT_SWAP
- Enhance TradesHistoryPanel with visual trade type indicators:
  * SPOT_SWAP: Purple badge with ⚡ icon
  * MARKET: Blue badge with 📈 icon
  * LIMIT: Orange badge with 🎯 icon
  * STOP: Red badge with 🛑 icon
- Add trade history update functionality for modifying existing trades
- Fix container communication URLs in execute-dex route

Result: Spot trades no longer create open positions, trade history clearly shows trade types

app/api/trading/execute-dex/route.js

@@ -191,8 +191,9 @@ export async function POST(request) {
         message: `${side.toUpperCase()} order executed on Jupiter DEX${stopLoss || takeProfit ? ' with TP/SL monitoring' : ''}`
       }
 
-      // Add trade to history
+      // Add trade to history with clear spot swap indication
       try {
+        // Use localhost for internal container communication
         await fetch('http://localhost:3000/api/trading/history', {
           method: 'POST',
           headers: { 'Content-Type': 'application/json' },
@@ -202,44 +203,26 @@ export async function POST(request) {
             side: side.toUpperCase(),
             amount: amount,
             price: 168.1, // Get from actual execution
-            type: 'market',
+            type: 'SPOT_SWAP', // Clearly indicate this is a spot swap
             status: 'executed',
             txId: tradeResult.txId,
             dex: 'JUPITER',
-            notes: closePosition ? 'Position closing trade' : null
+            tradingMode: 'SPOT',
+            notes: closePosition ? 'Position closing trade' : `Spot swap: ${amount} ${fromCoin || symbol} → ${toCoin || 'USDC'}`
           })
         })
-        console.log('✅ Trade added to history')
+        console.log('✅ Spot trade added to history')
       } catch (error) {
         console.error('❌ Failed to add trade to history:', error)
       }
 
-      // Create position only if not closing an existing position
-      if (!closePosition) {
-        try {
-          const positionResponse = await fetch('http://localhost:3000/api/trading/positions', {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
-              action: 'add',
-              symbol: tradingPair || `${fromCoin || symbol}/${toCoin || 'USDC'}`,
-              side: side.toUpperCase(),
-              amount: amount,
-              entryPrice: 168.1, // Get from actual execution
-              stopLoss: stopLoss,
-              takeProfit: takeProfit,
-              txId: tradeResult.txId,
-              leverage: 1
-            })
-          })
-          
-          if (positionResponse.ok) {
-            console.log('✅ Position created for DEX trade')
-          }
-        } catch (error) {
-          console.error('❌ Failed to create position:', error)
-        }
-      }
+      // DON'T create positions for spot swaps - they're instant settlements
+      // Only leverage/perpetual trades should create positions
+      // For spot trades, we only need trade history entries
+      
+      // Note: Position creation is intentionally removed for spot trades
+      // If this trade had stop loss or take profit, those would be handled as separate limit orders
+      console.log('✅ Spot trade completed - no position created (instant settlement)')
 
       return NextResponse.json(tradeResponse)