Add per-account-type splitEnabled flag from the catalog

When the master marks an account type splitEnabled=false, big days trade
as one unsplit leg (the legacy one-and-done behavior); min-day bumps are
unaffected. Missing field — older master or pre-toggle cached catalog —
defaults to enabled.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/auto-trade.ts

@@ -79,7 +79,8 @@ function evaluateAccountForTrade(client: any, acc: { id: number; name: string; a
     const equityProfit = cash.amount - cfg.accountSize;
     const plan = computeDayPlan(
         acc.id, tradeDate, effective.profitTarget, effective.consistency,
-        dailyPnL, cfg.minDayPnL, effective.minTradingDays, equityProfit, cash.realizedPnL
+        dailyPnL, cfg.minDayPnL, effective.minTradingDays, equityProfit, cash.realizedPnL,
+        cfg.splitEnabled
     );
     if (!plan) return { ...base, eligible: false, reason: 'invalid balance' };