Vest: stops reserve 0.02% of the position for slippage, not 0.1%

A platform may now state its own stop slippage share
(PlatformClient.stopSlippageFraction); the daily-loss reserve is the
larger of 10% of the limit and that share of the position. Vest's 9
measured stop-outs filled 0.9 points past the trigger on average and
2.25 at worst, against the ~30 points 0.1% held back. On a $1,400 day
with ~$495k of NDX the stop goes from ~$880 to ~$1,230, and the leg
sizes up for the same hold. Sizing, the placed stop, the dashboard's
next stop and the reset guard all use it; other platforms keep 0.1%.

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

lib/auto-trade.ts

@@ -1399,6 +1399,7 @@ function sizeLeg(item: SizingItem, contract: LegContract, legAmount: number, tra
         maxLossRoom: floorRoom,
         obfuscationDollars: obfuscation,
         availableFunds: live.availableFunds ?? live.amount,
+        slippageFraction: item.client.stopSlippageFraction,
     });
     return { ...plan, pct, obfuscation, maxLossRoom: floorRoom };
 }
@@ -1545,7 +1546,7 @@ 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 })
+        ? dllStopDollars({ room: item.dllRoom, dailyLossLimit: dll, entryFee: dllFee, commissionPct: pct, notional, slippageFraction: client.stopSlippageFraction })
         : Infinity;
     const ticks = stopTicks({ obfuscationDollars: obfuscation, dllDollars, pointValue: pv, contracts, tickSize: legContract.tickSize });
     if (ticks === 0) {