feat: apply feedback updates and streamline online delivery

src/routes/combination/+page.svelte

@@ -21,6 +21,7 @@
     effectiveActiveProbability,
     eventBonusBreakdown,
     eventChallengeSongScoreBonusPercent,
+    eventOptimizationCardEligible,
     eventPointIndex,
     generateAnchoredCombinationCandidates,
     generateCombinationCandidates,
@@ -102,7 +103,7 @@
   const fiveStarCards = allCards.filter((card) => card.rarity === 5);
   const eventBonusCharacters = new Set<string>(events.flatMap((event) => [...event.bonusCharacterIds]));
   const eligibleCards = eventMode
-    ? allCards.filter((card) => card.rarity === 5 || eventBonusCharacters.has(card.characterId))
+    ? allCards.filter((card) => eventOptimizationCardEligible(card, eventBonusCharacters))
     : fiveStarCards;
   const cardById = new Map(allCards.map((card) => [card.id, card]));
   const allCharts = exactChartCatalog.charts;
@@ -428,7 +429,7 @@
   }
 
   function cardLabel(card: CardRow): string {
-    return `${collection[card.id]?.owned ? '● ' : ''}${card.name}${card.versionName ? ` · ${card.versionName}` : ''}`;
+    return `${collection[card.id]?.owned ? '● ' : ''}${card.rarity}★ ${card.name}${card.versionName ? ` · ${card.versionName}` : ''}`;
   }
 
   function updateFixedCard(slot: number, cardId: string): void {