feat(character-detail): 상세 화면 도입 및 네비게이션/API 연동

SodaLive/Sources/Chat/Character/Detail/CharacterDetailViewModel.swift

@@ -0,0 +1,70 @@
+//
+//  CharacterDetailViewModel.swift
+//  SodaLive
+//
+//  Created by klaus on 9/1/25.
+//
+import Foundation
+import Combine
+import Moya
+
+final class CharacterDetailViewModel: ObservableObject {
+    // MARK: - Published State
+    @Published private(set) var characterDetail: CharacterDetailResponse?
+    
+    @Published var isLoading: Bool = false
+    @Published var errorMessage: String = ""
+    @Published var isShowPopup = false
+    @Published var characterId: Int = 0 {
+        didSet {
+            if characterId > 0 {
+                getCharacterDetail(characterId: characterId)
+            }
+        }
+    }
+    
+    // MARK: - Private
+    private let repository = CharacterDetailRepository()
+    private var subscription = Set<AnyCancellable>()
+    
+    // MARK: - Public Methods
+    func getCharacterDetail(characterId: Int) {
+        isLoading = true
+        
+        repository.getCharacterDetail(characterId: characterId)
+            .receive(on: DispatchQueue.main)
+            .sink { result in
+                switch result {
+                case .finished:
+                    DEBUG_LOG("finish")
+                case .failure(let error):
+                    ERROR_LOG(error.localizedDescription)
+                }
+            } receiveValue: { [weak self] response in
+                let responseData = response.data
+                self?.isLoading = false
+                
+                do {
+                    let jsonDecoder = JSONDecoder()
+                    let decoded = try jsonDecoder.decode(ApiResponse<CharacterDetailResponse>.self, from: responseData)
+                    
+                    if let data = decoded.data, decoded.success {
+                        self?.characterDetail = data
+                    } else {
+                        if let message = decoded.message {
+                            self?.errorMessage = message
+                        } else {
+                            self?.errorMessage = "다시 시도해 주세요.\n계속 같은 문제가 발생할 경우 고객센터로 문의 주시기 바랍니다."
+                        }
+                        
+                        self?.isShowPopup = true
+                    }
+                } catch {
+                    ERROR_LOG(String(describing: error))
+                    self?.errorMessage = "다시 시도해 주세요.\n계속 같은 문제가 발생할 경우 고객센터로 문의 주시기 바랍니다."
+                    self?.isShowPopup = true
+                }
+            }
+            .store(in: &subscription)
+    }
+}