Vest: a crypto leg's stop holds back the engine's default slippage, not NDX's

Crypto (exchangeInfo asset "crypto": BTC, ETH, SOL, HYPE) trades on weekends
when NDX, SPX and GC are shut, but its stop slippage on Vest is unmeasured, and
its book is a fraction of NDX's: about $10M an hour on a weekend against $600M,
with a batch's stops firing together. Its stops now leave 0.1% of the
position unspent (the engine's default) instead of the 0.02% measured on NDX
stop-outs; every other symbol keeps 0.02%.

The share rides on the picked contract and is used wherever a Vest leg's stop
is sized: the batch's plan, the leg's own stop, the dashboard's next stop, and
the 7:55 PM ET reset guard, which now sums each open position's own share.

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

lib/auto-trade.ts

@@ -1426,7 +1426,7 @@ function sizeLeg(item: SizingItem, contract: LegContract, legAmount: number, tra
         maxLossRoom: floorRoom,
         obfuscationDollars: obfuscation,
         availableFunds: live.availableFunds ?? live.amount,
-        slippageFraction: item.client.stopSlippageFraction,
+        slippageFraction: contract.stopSlippageFraction ?? item.client.stopSlippageFraction,
     });
     return { ...plan, pct, obfuscation, maxLossRoom: floorRoom };
 }
@@ -1577,7 +1577,7 @@ async function fireLeg(
     const dllFee = pct > 0 ? entryFee : (measured ?? MAX_COMMISSION_PER_CONTRACT * contracts);
     const notional = fill.price * pv * contracts;
     const dllDollars = dllOn && !plan.lastStand
-        ? dllStopDollars({ room: item.dllRoom, dailyLossLimit: dll, entryFee: dllFee, commissionPct: pct, notional, slippageFraction: client.stopSlippageFraction })
+        ? dllStopDollars({ room: item.dllRoom, dailyLossLimit: dll, entryFee: dllFee, commissionPct: pct, notional, slippageFraction: legContract.stopSlippageFraction ?? client.stopSlippageFraction })
         : Infinity;
     const ticks = stopTicks({ obfuscationDollars: obfuscation, dllDollars, pointValue: pv, contracts, tickSize: legContract.tickSize });
     if (ticks === 0) {