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>

types.ts

@@ -10,7 +10,7 @@ export interface AccountConfig {
     minDayPnL: number;
     minTradingDays: number;
     accountSize: number;
-    maxLoss: number;          // 0 = no limit; positive = account is "Dead" when loss exceeds this
+    maxLoss: number;          // static max drawdown below the starting size (0 = none); with a hard daily loss, decides last stands
     maxPositionSize: number;  // 0 = no limit; positive = max contracts per trade
     targetSameEquity: boolean;   // if true, reduce profitTarget by priorProfit after withdrawal
     splitEnabled: boolean;    // false = big days trade as one unsplit leg instead of random ≥$500 pieces
@@ -30,10 +30,8 @@ export interface AccountConfig {
     profitSplit?: number;
     trailingDrawdown?: number;
     /** Hard daily loss limit in dollars (0/absent = none): every leg carries a
-     *  stop that keeps the firm's day inside it, less a 10% reserve and fees. */
+     *  stop that keeps the firm's day inside it, less a reserve and fees. */
     dailyLossLimit?: number;
-    /** Cap on one position's notional in dollars (0/absent = none). */
-    maxNotional?: number;
     /** The firm trades every calendar day, weekends and CME holidays included. */
     tradesEveryDay?: boolean;
 }
@@ -107,7 +105,12 @@ export interface AccountState {
         swapReserve: number;
         /** The broker's leverage on the symbol (5 = 5:1); null when unstated. */
         leverage: number | null;
+        /** Expected spread, commissions and swap for the leg. */
+        cost: number;
     } | null;
+    /** The next leg rides without a daily-loss stop: a stop-out would leave
+     *  the account too close to its max-drawdown floor to trade on. */
+    lastStand: boolean;
     /** Actual profit target to hit — max(stage profit target, consistency realTarget = maxDay/consistency). */
     effectiveProfitTarget: number | null;
     /** Current cycle daily P&L — used for target calculations. */