Legs: cheapest symbol that reaches the target hold, last stands, a reserve that grows with size

- A batch sizes its leg on every mapped candidate, each at the leverage
  the broker states for it, and trades the cheapest (spread, commissions,
  expected swap) that reaches the target hold — else the quickest. The
  dashboard ranks the same way from a half-hourly candidate survey.
- Last stand: when a daily-loss stop-out would leave the account within
  15% of that loss above its max-drawdown floor (the account type's static
  max loss, or the broker's liquidation floor), the leg carries no
  daily-loss stop and is sized against the firm's own breach.
- The daily-loss reserve is 10% of the limit or 0.1% of the position,
  whichever is more, since a stop's slippage grows with the position.
- The account type's max notional is gone: the broker's margin rates cap
  each symbol. planLegSize holds the one sizing rule fireLeg, the pick and
  the dashboard share.

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

app/api/firms/route.ts

@@ -45,7 +45,6 @@ export async function GET() {
                     combineCmeHolidays: a.combineCmeHolidays,
                     withdrawalStages: a.withdrawalStages,
                     dailyLossLimit: a.dailyLossLimit ?? 0,
-                    maxNotional: a.maxNotional ?? 0,
                     tradesEveryDay: a.tradesEveryDay === true,
                 })),
                 catalogUpdatedAt: firm.updatedAt,