Reconstruct TopstepX MLL floors from the EOD balance curve

TopstepX never reports the Maximum Loss Limit, but it's deterministic:
floor = min(0, eodBalanceHigh − trailingDrawdown), locking at the $0
starting balance. The EOD curve rebuilds from daily P&L + fund events,
with off-book fee drift spread across days proportionally to reported
fees (validated against a platform-reported MLL to ~$0.10). Stored in
autoLiqThresholds — negative, or +$0.01 once locked — so dead detection,
dashboards, and the ruin model's startThreshold all use the real room.
Guards move from '> 0' to '!== 0'; 0 still means no floor. canTrade=false
accounts are skipped. daily_pnl gains a fees column for the weighting.

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

app/api/state/route.ts

@@ -45,7 +45,8 @@ export async function GET() {
                 const dailyPnL = combined.dailyPnL;
                 const totalProfit = dailyPnL.reduce((sum, d) => sum + d.pnl, 0);
                 const autoLiqThreshold = client.autoLiqThresholds[acc.id] ?? 0;
-                const isDead = autoLiqThreshold > 0 && cash.amount <= autoLiqThreshold;
+                // 0 = no floor; negative floors are reconstructed TopstepX MLLs.
+                const isDead = autoLiqThreshold !== 0 && cash.amount <= autoLiqThreshold;
                 const allFundTxns = client.fundTransactions?.[acc.id] ?? [];
                 const priorProfit = client.priorProfit?.[acc.id] ?? 0;
                 // Stage = 1 + number of withdrawals (negative fund transactions)