feat: simulate individual active skill failures in analysis

src/lib/engine/exact-optimizer.ts

@@ -99,10 +99,11 @@ function makeProfiles(order: readonly OptimizerCard[], chart: ExactSongChart): M
   return profiles;
 }
 
-function resultWindows(
+export function buildExactSkillWindows(
   order: readonly OptimizerCard[],
   reductions: Readonly<Record<string, CooldownReduction>>,
-  chart: ExactSongChart
+  chart: ExactSongChart,
+  excludedActiveWindows: readonly Pick<SkillWindow, 'cardId' | 'startSeconds'>[] = []
 ): { activeWindows: SkillWindow[]; effectiveActiveWindows: EffectiveSkillWindow[]; specialWindows: SkillWindow[] } {
   const activeWindows = order.flatMap((card) => {
     const interval = effectiveCooldownSeconds(card.active.cooldownSeconds, reductions[card.id] ?? 0);
@@ -143,7 +144,8 @@ function resultWindows(
     const midpoint = (startSeconds + endSeconds) / 2;
     const specialSupport = specialRate(order, chart, midpoint, 'scoreUpPercent');
     const active = activeWindows
-      .filter((window) => window.startSeconds <= midpoint && midpoint < window.endSeconds)
+      .filter((window) => window.startSeconds <= midpoint && midpoint < window.endSeconds &&
+        !excludedActiveWindows.some((excluded) => excluded.cardId === window.cardId && Math.abs(excluded.startSeconds - window.startSeconds) < 1e-9))
       .map((window) => {
         const cardIndex = orderIndex.get(window.cardId) ?? 0;
         const card = order[cardIndex];
@@ -265,7 +267,7 @@ export function optimizeExactOrderAndCooldowns(
   }
 
   if (!bestOrder || !bestReductions) throw new Error('분석 결과를 만들지 못했습니다.');
-  const windows = resultWindows(bestOrder, bestReductions, chart);
+  const windows = buildExactSkillWindows(bestOrder, bestReductions, chart);
   return {
     ...calculateExactScore(bestOrder, bestReductions, chart, options),
     order: bestOrder.map((card) => card.id),