feat: Add direction-specific quality thresholds and dynamic collateral display

- Split QUALITY_LEVERAGE_THRESHOLD into separate LONG and SHORT variants
- Added /api/drift/account-health endpoint for real-time collateral data
- Updated settings UI to show separate controls for LONG/SHORT thresholds
- Position size calculations now use dynamic collateral from Drift account
- Updated .env and docker-compose.yml with new environment variables
- LONG threshold: 95, SHORT threshold: 90 (configurable independently)

Files changed:
- app/api/drift/account-health/route.ts (NEW) - Account health API endpoint
- app/settings/page.tsx - Added collateral state, separate threshold inputs
- app/api/settings/route.ts - GET/POST handlers for LONG/SHORT thresholds
- .env - Added QUALITY_LEVERAGE_THRESHOLD_LONG/SHORT variables
- docker-compose.yml - Added new env vars with fallback defaults

Impact:
- Users can now configure quality thresholds independently for LONG vs SHORT signals
- Position size display dynamically updates based on actual Drift account collateral
- More flexible risk management with direction-specific leverage tiers

app/api/drift/account-health/route.ts

@@ -0,0 +1,36 @@
+import { NextResponse } from 'next/server'
+import { initializeDriftService } from '@/lib/drift/client'
+
+/**
+ * GET /api/drift/account-health
+ * 
+ * Returns current account health metrics from Drift Protocol
+ * Used by settings UI to dynamically display collateral and calculate position sizes
+ */
+export async function GET() {
+  try {
+    const driftService = await initializeDriftService()
+    
+    if (!driftService) {
+      return NextResponse.json(
+        { error: 'Drift service not initialized' },
+        { status: 503 }
+      )
+    }
+
+    const health = await driftService.getAccountHealth()
+
+    return NextResponse.json({
+      totalCollateral: health.totalCollateral,
+      freeCollateral: health.freeCollateral,
+      totalLiability: health.totalLiability,
+      marginRatio: health.marginRatio,
+    })
+  } catch (error: any) {
+    console.error('❌ Error fetching account health:', error)
+    return NextResponse.json(
+      { error: 'Failed to fetch account health', details: error.message },
+      { status: 500 }
+    )
+  }
+}

app/api/settings/route.ts

@@ -132,7 +132,8 @@ export async function GET() {
       USE_ADAPTIVE_LEVERAGE: env.USE_ADAPTIVE_LEVERAGE === 'true',
       HIGH_QUALITY_LEVERAGE: parseFloat(env.HIGH_QUALITY_LEVERAGE || '5'),
       LOW_QUALITY_LEVERAGE: parseFloat(env.LOW_QUALITY_LEVERAGE || '1'),
-      QUALITY_LEVERAGE_THRESHOLD: parseInt(env.QUALITY_LEVERAGE_THRESHOLD || '95'),
+      QUALITY_LEVERAGE_THRESHOLD_LONG: parseInt(env.QUALITY_LEVERAGE_THRESHOLD_LONG || env.QUALITY_LEVERAGE_THRESHOLD || '95'),
+      QUALITY_LEVERAGE_THRESHOLD_SHORT: parseInt(env.QUALITY_LEVERAGE_THRESHOLD_SHORT || '90'),
     }
     
     return NextResponse.json(settings)
@@ -207,7 +208,8 @@ export async function POST(request: NextRequest) {
       USE_ADAPTIVE_LEVERAGE: settings.USE_ADAPTIVE_LEVERAGE.toString(),
       HIGH_QUALITY_LEVERAGE: settings.HIGH_QUALITY_LEVERAGE.toString(),
       LOW_QUALITY_LEVERAGE: settings.LOW_QUALITY_LEVERAGE.toString(),
-      QUALITY_LEVERAGE_THRESHOLD: settings.QUALITY_LEVERAGE_THRESHOLD.toString(),
+      QUALITY_LEVERAGE_THRESHOLD_LONG: settings.QUALITY_LEVERAGE_THRESHOLD_LONG.toString(),
+      QUALITY_LEVERAGE_THRESHOLD_SHORT: settings.QUALITY_LEVERAGE_THRESHOLD_SHORT.toString(),
     }
     
     const success = updateEnvFile(updates)