critical: FIX adaptive leverage broken - smart entry used 1x instead of 10x (Bug #85)

SYMPTOM:
- Database shows leverage=10 for quality 95 signals
- Drift shows actual leverage 0.99x (essentially 1x)
- User expected ,960 position (10x), got 92 (1x)

ROOT CAUSE:
- Dec 14 fix (commit 5aad42f) passed wrong variable to smart entry queue
- Line 569: positionSizeUSD: positionSize (BASE size without leverage)
- Should be: positionSizeUSD: positionSizeUSD (LEVERAGED size)
- positionSizeUSD correctly calculated at line 504: positionSize * leverage

IMPACT:
- ALL smart entry timeout trades since Dec 14 used 1x leverage
- Adaptive leverage completely bypassed for queued signals
- User losing 90% of profit potential on quality 95+ signals

THE FIX:
- Changed line 569 from positionSize to positionSizeUSD
- Now passes correctly leveraged size to queue
- Smart entry timeouts will use adaptive 10x leverage

VERIFICATION:
- Container restarted: 2025-12-16 09:44:24 UTC
- Next smart entry timeout trade will show 10x leverage in Drift

See Common Pitfalls #85 for full details.

app/api/trading/execute/route.ts

@@ -556,6 +556,9 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
           // CRITICAL FIX (Dec 13, 2025): Pass positionSizeUSD and leverage to prevent recalculation on timeout
           // Bug: Timeout recalculates size fresh, gets $10.40 instead of $435 (97.6% loss)
           // Fix: Store calculated size when queueing, use stored value during execution
+          // CRITICAL FIX (Dec 16, 2025): Pass LEVERAGED size, not base size
+          // Bug: Passed positionSize instead of positionSizeUSD = 1x leverage instead of 10x
+          // Fix: Use positionSizeUSD variable (calculated as positionSize * leverage at line 504)
           const queuedSignal = smartEntryTimer.queueSignal({
             symbol: driftSymbol,
             direction: body.direction,
@@ -567,7 +570,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
             pricePosition: body.pricePosition,
           indicatorVersion: body.indicatorVersion,
           qualityScore: qualityResult.score,
-            positionSizeUSD: positionSize, // CRITICAL: Store calculated USD size
+            positionSizeUSD: positionSizeUSD, // CRITICAL: Store LEVERAGED USD size (positionSize * leverage)
             leverage: leverage, // CRITICAL: Store calculated leverage
         })