fix(settings): 로그아웃 시 로컬 채팅 메시지 전체 삭제 연동

- SettingsViewModel에 ChatRepository 주입 및 삭제 로직 처리
- DI(Koin) 수정으로 SettingsViewModel에 ChatRepository 바인딩
- 삭제 실패 시에도 사용자 로그아웃 흐름 유지

app/src/main/java/kr/co/vividnext/sodalive/di/AppDI.kt

@@ -288,7 +288,7 @@ class AppDI(private val context: Context, isDebugMode: Boolean) {
         viewModel { EventViewModel(get()) }
         viewModel { NotificationSettingsViewModel(get()) }
         viewModel { ContentSettingsViewModel() }
-        viewModel { SettingsViewModel(get()) }
+        viewModel { SettingsViewModel(get(), get()) }
         viewModel { SeriesDetailViewModel(get(), get()) }
         viewModel { SeriesListAllViewModel(get()) }
         viewModel { SeriesContentAllViewModel(get()) }

app/src/main/java/kr/co/vividnext/sodalive/settings/SettingsActivity.kt

@@ -191,7 +191,7 @@ class SettingsActivity : BaseActivity<ActivitySettingsBinding>(ActivitySettingsB
             alarmViewModel.truncate()
             recentContentViewModel.truncate()
 
-             finishAffinity()
+            finishAffinity()
             startActivity(Intent(applicationContext, SplashActivity::class.java))
         }
     }

app/src/main/java/kr/co/vividnext/sodalive/settings/SettingsViewModel.kt

@@ -6,10 +6,14 @@ import com.orhanobut.logger.Logger
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import io.reactivex.rxjava3.schedulers.Schedulers
 import kr.co.vividnext.sodalive.base.BaseViewModel
+import kr.co.vividnext.sodalive.chat.talk.room.ChatRepository
 import kr.co.vividnext.sodalive.common.SharedPreferenceManager
 import kr.co.vividnext.sodalive.user.UserRepository
 
-class SettingsViewModel(private val userRepository: UserRepository) : BaseViewModel() {
+class SettingsViewModel(
+    private val userRepository: UserRepository,
+    private val chatRepository: ChatRepository
+) : BaseViewModel() {
     private val _toastLiveData = MutableLiveData<String?>()
     val toastLiveData: LiveData<String?>
         get() = _toastLiveData
@@ -26,7 +30,18 @@ class SettingsViewModel(private val userRepository: UserRepository) : BaseViewMo
                 .subscribe(
                     {
                         if (it.success) {
-                            onSuccess()
+                            // ViewModel 레이어에서 로컬 채팅 메시지 삭제 후 onSuccess 호출
+                            chatRepository.clearAllMessagesOnLogout()
+                                .subscribeOn(Schedulers.io())
+                                .observeOn(AndroidSchedulers.mainThread())
+                                .subscribe({
+                                    onSuccess()
+                                }, { err ->
+                                    // 실패하더라도 UX를 위해 동일 흐름 진행
+                                    err.message?.let { msg -> Logger.w(msg) }
+                                    onSuccess()
+                                })
+                                .let { disposable -> compositeDisposable.add(disposable) }
                         } else {
                             if (it.message != null) {
                                 _toastLiveData.postValue(it.message)
@@ -53,7 +68,16 @@ class SettingsViewModel(private val userRepository: UserRepository) : BaseViewMo
                 .subscribe(
                     {
                         if (it.success) {
-                            onSuccess()
+                            chatRepository.clearAllMessagesOnLogout()
+                                .subscribeOn(Schedulers.io())
+                                .observeOn(AndroidSchedulers.mainThread())
+                                .subscribe({
+                                    onSuccess()
+                                }, { err ->
+                                    err.message?.let { msg -> Logger.w(msg) }
+                                    onSuccess()
+                                })
+                                .let { disposable -> compositeDisposable.add(disposable) }
                         } else {
                             if (it.message != null) {
                                 _toastLiveData.postValue(it.message)