댓글 정렬과 뷰어 레일 정리

backend/src/db.js

@@ -2740,6 +2740,11 @@ async function listTierListComments(tierListId) {
     }
     roots.push(comment)
   })
+  roots.sort((a, b) => {
+    const timeDiff = Number(b.createdAt || 0) - Number(a.createdAt || 0)
+    if (timeDiff !== 0) return timeDiff
+    return String(b.id || '').localeCompare(String(a.id || ''))
+  })
   return roots
 }