Add last trade details to analytics dashboard

- Add getLastTrade() function to database service
- Create /api/analytics/last-trade endpoint
- Display last trade with full details on analytics page
- Show entry/exit prices, P&L, position size, targets
- Visual indicators for trade direction and exit reason
- Helps quickly diagnose where trades went (TP1, TP2, or SL)

lib/database/trades.ts

@@ -272,6 +272,24 @@ export async function getLastTradeTime(): Promise<Date | null> {
   }
 }
 
+/**
+ * Get the most recent trade with full details
+ */
+export async function getLastTrade() {
+  const prisma = getPrismaClient()
+  
+  try {
+    const lastTrade = await prisma.trade.findFirst({
+      orderBy: { createdAt: 'desc' },
+    })
+    
+    return lastTrade
+  } catch (error) {
+    console.error('❌ Failed to get last trade:', error)
+    return null
+  }
+}
+
 /**
  * Get count of trades in the last hour
  */