Fix: Critical bugs - TP2 runner calculation + race condition + order cleanup

**Issue 1: TP2 Runner Position Bug** ✅ FIXED
- TP2 was calculated as 80% of ORIGINAL position instead of REMAINING
- With TP1=75%, TP2=80%: Was closing 75%+80%=155% (capped at 100%)
- Now correctly: TP1 closes 75%, TP2 closes 80% of remaining 25% = 20%
- Result: 5% runner now remains for trailing stop as intended!

**Issue 2: Race Condition - Orphaned SL Orders** ✅ FIXED
- Orders were placed AFTER Position Manager started monitoring
- If TP hit fast, PM detected 'external closure' before orders finished
- Orders completed after position gone → orphaned SL orders on Drift
- Now: Exit orders placed BEFORE starting monitoring
- PM can now properly cancel remaining orders when position closes

**Issue 3: 5min vs 15min Timeframe** ⚠️ NEEDS VERIFICATION
- n8n workflow correctly filters for timeframe === '15'
- Extracts timeframe with regex: /\.P\s+(\d+)/
- User needs to verify TradingView alert includes '.P 15' in message
- Format should be: 'SOL buy .P 15' not just 'SOL buy'

**Technical Changes:**
- lib/drift/orders.ts: Fixed TP2 calculation to use remaining size
- Added logging: Shows TP1, TP2, remaining, and runner amounts
- app/api/trading/execute/route.ts: Reordered to place orders before monitoring
- Prevents race condition where orders complete after position closed

**Testing:**
- Next trade will show proper runner position (5% remains)
- No more orphaned SL orders after wins
- Logs will show: 'Runner (if any): $X.XX'

**Documentation:**
- Created CRITICAL_ISSUES_FOUND.md explaining all 3 issues
- Created FIXES_APPLIED.md with testing instructions

lib/drift/orders.ts

@@ -228,8 +228,16 @@ export async function placeExitOrders(options: PlaceExitOrdersOptions): Promise<
     }
 
     // Calculate sizes in USD for each TP
+    // CRITICAL FIX: TP2 must be percentage of REMAINING size after TP1, not original size
     const tp1USD = (options.positionSizeUSD * options.tp1SizePercent) / 100
-    const tp2USD = (options.positionSizeUSD * options.tp2SizePercent) / 100
+    const remainingAfterTP1 = options.positionSizeUSD - tp1USD
+    const tp2USD = (remainingAfterTP1 * options.tp2SizePercent) / 100
+    
+    console.log(`📊 Exit order sizes:`)
+    console.log(`   TP1: ${options.tp1SizePercent}% of $${options.positionSizeUSD.toFixed(2)} = $${tp1USD.toFixed(2)}`)
+    console.log(`   Remaining after TP1: $${remainingAfterTP1.toFixed(2)}`)
+    console.log(`   TP2: ${options.tp2SizePercent}% of remaining = $${tp2USD.toFixed(2)}`)
+    console.log(`   Runner (if any): $${(remainingAfterTP1 - tp2USD).toFixed(2)}`)
 
     // For orders that close a long, the order direction should be SHORT (sell)
     const orderDirection = options.direction === 'long' ? PositionDirection.SHORT : PositionDirection.LONG