fix: TypeScript errors in withdrawal system

- Fixed LAST_WITHDRAWAL_TIME type (null | string)
- Removed parseFloat on health.freeCollateral (already number)
- Fixed getDriftClient() → getClient() method name
- Build now compiles successfully

Deployed: Withdrawal system now live on dashboard

app/api/withdrawals/settings/route.ts

@@ -19,7 +19,7 @@ const DEFAULT_SETTINGS = {
   MIN_WITHDRAWAL_AMOUNT: 50, // Minimum $50
   MIN_ACCOUNT_BALANCE: 500, // Never drop below $500
   WITHDRAWAL_DESTINATION: process.env.WALLET_PUBLIC_KEY || '',
-  LAST_WITHDRAWAL_TIME: null,
+  LAST_WITHDRAWAL_TIME: null as string | null,
   TOTAL_WITHDRAWN: 0,
 }
 

app/api/withdrawals/stats/route.ts

@@ -18,7 +18,7 @@ export async function GET() {
     // Get current Drift balance
     const driftService = await initializeDriftService()
     const health = await driftService.getAccountHealth()
-    const currentBalance = parseFloat(health.freeCollateral)
+    const currentBalance = health.freeCollateral // Already a number
     
     // Calculate total P&L from database
     const trades = await prisma.trade.findMany({

lib/drift/withdraw.ts

@@ -45,7 +45,7 @@ export async function withdrawFromDrift(
     
     // Execute withdrawal via Drift SDK
     // withdraw(amount, marketIndex, associatedTokenAddress, reduceOnly, subAccountId, txParams, updateFuel)
-    const signature = await driftService.getDriftClient().withdraw(
+    const signature = await driftService.getClient().withdraw(
       tokenAmount,
       usdcMarketIndex,
       destination,
@@ -93,7 +93,7 @@ export async function calculateWithdrawalAmount(): Promise<{
   try {
     const driftService = await initializeDriftService()
     const health = await driftService.getAccountHealth()
-    const currentBalance = parseFloat(health.freeCollateral)
+    const currentBalance = health.freeCollateral // Already a number
     
     // Configuration
     const totalInvested = 546 // From roadmap