Vest: no leg opens into a market close, and accounts plan on Vest's day

Market close: a Vest entry now needs its symbol's market to stay open
for RESET_CLEAR_HOLDS holds of the leg (clearsClose), the clearance the
8 PM ET reset already gets: at the target hold, and at the leg's sized
hold when a leverage cap stretches it. That covers the weekly close and
the daily maintenance hour as Vest's market-hours periods list them.
Before a closure that runs past an 8 PM ET reset (the weekend, a
holiday: longClosure), the bot's own legs still open in the last 5
minutes are closed at market, loudly; a position the bot didn't open is
named in the log and left alone.

Vest's day: Vest accounts are planned, and their legs and entries
counted, on Vest's day (20:00 ET) instead of the Central date
(tradeDateFor, PlatformClient.tradeDate). Between 5 PM CT and the reset
the Central date counted the open Vest day as a prior day and as today's
realized P&L both ($3,000 to go, $800 made: $2,050 left, not $1,900) and
started the leg count over. Other platforms keep the Central date.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/trading-logic.ts

@@ -165,6 +165,18 @@ export function currentTradeDateCT(now: Date = new Date()): string {
     return new Date(date).toISOString().slice(0, 10);
 }
 
+/**
+ * The trade date a client's accounts are planned on and count their legs by:
+ * the platform's own day where its daily rows and realized P&L follow one
+ * that turns at another hour (Vest: 20:00 ET, two hours after the 5 PM CT
+ * roll), else the Central trade date. Between the two rolls the Central date
+ * would count the platform's still-open day both as a prior day and as
+ * today's realized P&L, and start the day's leg count over mid-day.
+ */
+export function tradeDateFor(client: { tradeDate?: (now: number) => string } | null | undefined, now: Date = new Date()): string {
+    return typeof client?.tradeDate === 'function' ? client.tradeDate(now.getTime()) : currentTradeDateCT(now);
+}
+
 /** Drain-day target grid: $4–$15 in $0.50 steps (23 values, MNQ's
  *  per-contract tick), always traded on MNQ. Drain days qualify at ≥
  *  DRAIN_DAY_MIN, so every draw counts. Seeded per (account, trade date) like
@@ -1387,6 +1399,15 @@ export function resetClearStop(o: { leg: number; resetInMs: number; holdHours: n
     return (o.leg * (c + Math.sqrt(c * c - 4))) / 2;
 }
 
+/** Whether a leg of `holdHours` starting now is all but sure to be done
+ *  before its market closes `closeInMs` from now: the RESET_CLEAR_HOLDS
+ *  holds a daily reset is given (resetClearStop). A leg still open at the
+ *  close can't be exited until the market reopens, and meets the reopen's
+ *  gap with its stop. */
+export function clearsClose(o: { closeInMs: number; holdHours: number }): boolean {
+    return o.closeInMs >= RESET_CLEAR_HOLDS * o.holdHours * 3_600_000;
+}
+
 /**
  * dllRoom where the platform states its daily-loss floor itself (Vest: the
  * equity the account may not fall below today, already moved by the day's