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>

app/api/state/route.ts

@@ -166,7 +166,7 @@ export async function GET() {
                         const best = rankNextLeg({
                             client, accountId: acc.id, cfg, firm: f, leg: plan.remainingToday, dllRoom,
                             obfuscationDollars: obfuscationStopDollars(cfg, dailyPnL, plan, combined.tradeDate, plan.remainingToday),
-                            cash,
+                            cash, tradeDate: combined.tradeDate,
                         })[0];
                         if (best) {
                             holdEstimate = {