Tradeify247: each person sizes a little apart from everyone else

Every machine sized a like account in a like state to the same position as
every other person's, so two people's positions could match to the unit.
Each person now draws a size factor in [0.85, 1.15] per trade date, seeded
by the master's uuid for them; all of one person's accounts share it.

The factor moves the hold a DXtrade leg is sized for (hold / factor², since
size goes as 1/√hold), so the instrument pick, the dashboard's next leg and
the Firms page's reach test all see the hold the size was made for.

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

lib/auto-trade.ts

@@ -14,7 +14,6 @@ import {
     combineCmeSessions, computeDayPlan, groupLegFraction, pickLegAmount, resolveEffectiveConfig, currentTradeDateCT,
     obfuscationStopDollars, takeProfitPlan, onTick, percentFee, dllRoom, dllStopDollars, dllViable, stopTicks,
     expectedSwapToWin, planLegSize, maxLossRoom, breachDistance,
-    DEFAULT_TARGET_HOLD_HOURS,
     isNoTradeTime, isPastSessionClose,
     BIG_DAY_THRESHOLD, LEG_COMPLETION_EPSILON, MAX_LEGS_PER_DAY,
     FALLBACK_COMMISSION_PER_CONTRACT, MAX_COMMISSION_PER_CONTRACT, DLL_MIN_STOP,
@@ -27,6 +26,7 @@ import type { LaneTick, TickReason } from './master-protocol';
 import { POINT_VALUES, housekeepingRoot, HOUSEKEEPING_ROOT, MAX_HOLD_HOURS, futuresContracts } from './instrument-specs';
 import { firmInstruments, drawFuturesInstrument, spreadBlock, type LegShape } from './instruments';
 import { recordEntry } from './trade-mix';
+import { sizingHoldHours } from './person-size';
 import { errorMessage, isClientReady, isOrderNotPlaced, type PlatformClient, type PlatformContract, type PickContext } from './platform-client';
 
 // ── process-wide state ───────────────────────────────────────────────────────
@@ -1329,7 +1329,7 @@ function sizeLeg(item: SizingItem, contract: LegContract, legAmount: number, tra
         leg: legAmount,
         contract,
         commissionPct: pct,
-        targetHoldHours: item.firm.targetHoldHours || DEFAULT_TARGET_HOLD_HOURS,
+        targetHoldHours: sizingHoldHours(item.firm, tradeDate),
         financingPctPerDay: item.firm.financingPctPerDay ?? 0,
         dailyLossLimit: cfg.dailyLossLimit ?? 0,
         dllRoom: item.dllRoom,
@@ -1352,7 +1352,7 @@ function pickContextFor(items: SizingItem[], tradeDate: string): PickContext | u
     if (!lead) return undefined;
     const legAmount = legAmountFor(lead, tradeDate);
     return {
-        targetHoldHours: lead.firm.targetHoldHours || DEFAULT_TARGET_HOLD_HOURS,
+        targetHoldHours: sizingHoldHours(lead.firm, tradeDate),
         evaluate: (contract) => {
             const { sizing, cost } = sizeLeg(lead, contract, legAmount, tradeDate);
             return sizing && cost !== null ? { notional: sizing.notional, holdHours: sizing.predictedHoldHours, cost } : null;
@@ -1366,9 +1366,10 @@ function pickContextFor(items: SizingItem[], tradeDate: string): PickContext | u
  *
  * Size: futures trade one contract per $1,000 of leg; a platform that prices
  * positions (stepNotional) sizes by notional instead — whatever makes the
- * leg's expected hold the firm's target, from the instrument's recent
- * volatility — under the account type's notional cap and the instrument's
- * margin rate (the firm's leverage).
+ * leg's expected hold the firm's target as this person sizes it today
+ * (sizingHoldHours), from the instrument's recent volatility — under the
+ * account type's notional cap and the instrument's margin rate (the firm's
+ * leverage).
  *
  * Fees: a percent-of-notional firm's fee is computed off the fill; otherwise
  * it is read off the realized-P&L change a second after it. A firm that