fix(creator): 팬Talk 답글 수정을 확인한다

SodaLive/Sources/V2/CreatorChannel/FanTalk/Models/CreatorChannelFanTalkTabResponse.swift

@@ -18,6 +18,21 @@ struct CreatorChannelFanTalkItemResponse: Decodable, Identifiable {
     let creatorReplies: [CreatorChannelFanTalkReplyResponse]
 
     var id: Int { fanTalkId }
+
+    var latestCreatorReply: CreatorChannelFanTalkReplyResponse? {
+        creatorReplies.max { lhs, rhs in
+            switch (DateParser.parse(lhs.createdAtUtc), DateParser.parse(rhs.createdAtUtc)) {
+            case let (lhsDate?, rhsDate?):
+                return lhsDate < rhsDate
+            case (nil, _?):
+                return true
+            case (_?, nil):
+                return false
+            case (nil, nil):
+                return lhs.createdAtUtc < rhs.createdAtUtc
+            }
+        }
+    }
 }
 
 struct CreatorChannelFanTalkReplyResponse: Decodable, Identifiable {