From da78b43f64bc62a645af8b81dc0b090a26d73e94 Mon Sep 17 00:00:00 2001
From: Yu Sung <hwchon1234@gmail.com>
Date: Fri, 12 Sep 2025 00:26:07 +0900
Subject: [PATCH] =?UTF-8?q?fix(chat):=20Release=20=EB=B9=8C=EB=93=9C?=
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- SwiftUI diff 꼬임 원인 제거: LazyVStack 아이템 id 네임스페이스 분리
  - 메시지 셀: "msg_\(index)"
  - 쿼터 안내: "quota_\(messages.count)"
  - 타이핑 인디케이터: "typing_\(messages.count)"
- 스크롤 타깃 id도 동일 네임스페이스로 일관화
- Combine 체인 메인 스레드 보장: sendMessage/enterRoom에 receive(on: .main) 적용
- 성공/실패/디코드 실패 모든 경로에서 showSendingMessage 정상 복구

왜: 디버그에서는 보였으나 Release(TestFlight)에서 UI 반영이 유실됨.
동일 id 충돌 및 메인 스레드 미보장으로 SwiftUI diff/렌더링이 꼬인 것이 원인.
---
 .../Sources/Chat/Talk/Room/ChatRoomView.swift | 25 ++++++++-----------
 .../Chat/Talk/Room/ChatRoomViewModel.swift    |  5 ++++
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift b/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
index c4c634b..ce63ca2 100644
--- a/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
@@ -125,7 +125,7 @@ struct ChatRoomView: View {
                                         let message = viewModel.messages[index]
                                         if message.mine {
                                             UserMessageItemView(message: message)
-                                                .id(index)
+                                                .id("msg_\(index)")
                                         } else {
                                             AiMessageItemView(
                                                 message: message,
@@ -138,7 +138,7 @@ struct ChatRoomView: View {
                                                     viewModel.selectedMessageIndex = index
                                                 }
                                             }
-                                            .id(index)
+                                            .id("msg_\(index)")
                                         }
                                     }
                                     
@@ -146,11 +146,11 @@ struct ChatRoomView: View {
                                         ChatQuotaNoticeItemView(remainingTime: viewModel.countdownText) {
                                             viewModel.purchaseChatQuota()
                                         }
-                                        .id(viewModel.messages.count)
+                                        .id("quota_\(viewModel.messages.count)")
                                         .padding(.bottom, 12)
                                         .onAppear {
                                             withAnimation(.easeOut(duration: 0.3)) {
-                                                proxy.scrollTo(viewModel.messages.count, anchor: .bottom)
+                                                proxy.scrollTo("quota_\(viewModel.messages.count)", anchor: .bottom)
                                             }
                                         }
                                     }
@@ -160,22 +160,19 @@ struct ChatRoomView: View {
                                             characterName: viewModel.characterName,
                                             characterProfileUrl: viewModel.characterProfileUrl
                                         )
-                                        .id(viewModel.messages.count)
+                                        .id("typing_\(viewModel.messages.count)")
                                     }
                                 }
                                 .padding(.horizontal, 24)
                                 .frame(minHeight: geometry.size.height, alignment: .bottom)
                             }
                             .onChange(of: viewModel.messages.count) { _ in
-                                if !viewModel.messages.isEmpty {
-                                    withAnimation(.easeOut(duration: 0.3)) {
-                                        proxy.scrollTo(
-                                            viewModel.showSendingMessage ?
-                                            viewModel.messages.count :
-                                                viewModel.messages.count - 1,
-                                            anchor: .bottom
-                                        )
-                                    }
+                                guard !viewModel.messages.isEmpty else { return }
+                                withAnimation(.easeOut(duration: 0.3)) {
+                                    let targetId = viewModel.showSendingMessage
+                                    ? "typing_\(viewModel.messages.count)"
+                                    : "msg_\(viewModel.messages.count - 1)"
+                                    proxy.scrollTo(targetId, anchor: .bottom)
                                 }
                             }
                         }
diff --git a/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift b/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
index 4603567..4db4a36 100644
--- a/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
@@ -151,6 +151,7 @@ final class ChatRoomViewModel: ObservableObject {
             roomId: roomId,
             characterImageId: self.chatRoomBgImageId
         )
+        .receive(on: DispatchQueue.main)
         .sink { result in
             switch result {
             case .finished:
@@ -200,6 +201,7 @@ final class ChatRoomViewModel: ObservableObject {
     
     func getMemberInfo() {
         userRepository.getMemberInfo()
+            .receive(on: DispatchQueue.main)
             .sink { result in
                 switch result {
                 case .finished:
@@ -233,6 +235,7 @@ final class ChatRoomViewModel: ObservableObject {
         isLoading = true
         
         repository.purchaseMessage(roomId: roomId, messageId: selectedMessage.messageId)
+            .receive(on: DispatchQueue.main)
             .sink { result in
                 switch result {
                 case .finished:
@@ -277,6 +280,7 @@ final class ChatRoomViewModel: ObservableObject {
         isLoading = true
         
         repository.purchaseChatQuota(roomId: roomId)
+            .receive(on: DispatchQueue.main)
             .sink { result in
                 switch result {
                 case .finished:
@@ -320,6 +324,7 @@ final class ChatRoomViewModel: ObservableObject {
         isResetting = true
         
         repository.resetChatRoom(roomId: roomId)
+            .receive(on: DispatchQueue.main)
             .sink { result in
                 switch result {
                 case .finished: