fix: allow external leader in green node efficiency

src/routes/data/+page.svelte

@@ -158,7 +158,7 @@
   $: efficiencyFormationReady = efficiencyFormation.cardIds.length === 5
     && efficiencyFormation.cardIds.every((id) => cardById.has(id))
     && new Set(efficiencyFormation.cardIds.map((id) => cardById.get(id)?.characterId)).size === 5
-    && efficiencyFormation.cardIds.some((id) => cardById.get(id)?.characterId === efficiencyFormation.leaderCharacterId);
+    && leaderMembers.some((member) => member.characterId === efficiencyFormation.leaderCharacterId);
   $: dataView = $page.url.pathname.endsWith('/cards') ? 'cards' : $page.url.pathname.endsWith('/boards') ? 'boards' : 'home';
   onMount(() => {
     try {
@@ -632,7 +632,7 @@
 
   async function analyzeGreenNodeEfficiency() {
     if (!efficiencyFormationReady) {
-      greenEfficiencyError = '서로 다른 멤버의 5성 카드 5장을 모두 선택해 주세요.';
+      greenEfficiencyError = '서로 다른 멤버의 5성 카드 5장과 리더를 선택해 주세요.';
       return;
     }
     greenEfficiencyRunning = true;