diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 98023dfb..2fe2f65a 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,7 +6,7 @@
 
     <application
         android:name=".ThipApplication"
-        android:allowBackup="true"
+        android:allowBackup="false"
         android:networkSecurityConfig="@xml/network_security_config"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
diff --git a/app/src/main/java/com/texthip/thip/MainActivity.kt b/app/src/main/java/com/texthip/thip/MainActivity.kt
index a6e16e42..4e86f830 100644
--- a/app/src/main/java/com/texthip/thip/MainActivity.kt
+++ b/app/src/main/java/com/texthip/thip/MainActivity.kt
@@ -5,27 +5,32 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import com.texthip.thip.data.manager.AuthStateManager
 import com.texthip.thip.data.manager.TokenManager
 import com.texthip.thip.ui.navigator.navigations.authNavigation
 import com.texthip.thip.ui.navigator.routes.CommonRoutes
 import com.texthip.thip.ui.theme.ThipTheme
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.collectLatest
 import javax.inject.Inject
 
 @AndroidEntryPoint
 class MainActivity : ComponentActivity() {
     @Inject
     lateinit var tokenManager: TokenManager
+    @Inject
+    lateinit var authStateManager: AuthStateManager
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
         setContent {
             ThipTheme {
-                RootNavHost()
+                RootNavHost(authStateManager)
             }
         }
 //        getKakaoKeyHash(this)
@@ -33,8 +38,17 @@ class MainActivity : ComponentActivity() {
 }
 
 @Composable
-fun RootNavHost() {
+fun RootNavHost(authStateManager: AuthStateManager) {
     val navController = rememberNavController()
+
+    LaunchedEffect(Unit) {
+        authStateManager.tokenExpiredEvent.collectLatest {
+            navController.navigate(CommonRoutes.Login) {
+                popUpTo(0) { inclusive = true }
+            }
+        }
+    }
+    
     NavHost(
         navController = navController,
         startDestination = CommonRoutes.Splash
diff --git a/app/src/main/java/com/texthip/thip/data/manager/AuthStateManager.kt b/app/src/main/java/com/texthip/thip/data/manager/AuthStateManager.kt
new file mode 100644
index 00000000..c6420b0b
--- /dev/null
+++ b/app/src/main/java/com/texthip/thip/data/manager/AuthStateManager.kt
@@ -0,0 +1,16 @@
+package com.texthip.thip.data.manager
+
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class AuthStateManager @Inject constructor() {
+    private val _tokenExpiredEvent = MutableSharedFlow<Unit>(extraBufferCapacity = 1)
+    val tokenExpiredEvent = _tokenExpiredEvent.asSharedFlow()
+    
+    fun triggerTokenExpired() {
+        _tokenExpiredEvent.tryEmit(Unit)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/data/repository/UserRepository.kt b/app/src/main/java/com/texthip/thip/data/repository/UserRepository.kt
index 96afd970..dc7dfe02 100644
--- a/app/src/main/java/com/texthip/thip/data/repository/UserRepository.kt
+++ b/app/src/main/java/com/texthip/thip/data/repository/UserRepository.kt
@@ -137,4 +137,10 @@ class UserRepository @Inject constructor(
             .handleBaseResponse()
             .getOrThrow()
     }
+
+    suspend fun deleteAccount(): Result<Unit?> = runCatching {
+        userService.deleteAccount()
+            .handleBaseResponse()
+            .getOrThrow()
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/data/service/UserService.kt b/app/src/main/java/com/texthip/thip/data/service/UserService.kt
index a8149f6c..064180ae 100644
--- a/app/src/main/java/com/texthip/thip/data/service/UserService.kt
+++ b/app/src/main/java/com/texthip/thip/data/service/UserService.kt
@@ -15,6 +15,7 @@ import com.texthip.thip.data.model.users.response.SignupResponse
 import com.texthip.thip.data.model.users.response.UserSearchResponse
 import com.texthip.thip.data.model.users.response.UsersMyFollowingsRecentFeedsResponse
 import retrofit2.http.Body
+import retrofit2.http.DELETE
 import retrofit2.http.GET
 import retrofit2.http.Header
 import retrofit2.http.PATCH
@@ -74,4 +75,7 @@ interface UserService {
         @Query("size") size: Int = 30
     ): BaseResponse<UserSearchResponse>
 
+    @DELETE("users")
+    suspend fun deleteAccount(): BaseResponse<Unit>
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/common/cards/CardAlarm.kt b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/component/CardAlarm.kt
similarity index 86%
rename from app/src/main/java/com/texthip/thip/ui/common/cards/CardAlarm.kt
rename to app/src/main/java/com/texthip/thip/ui/common/alarmpage/component/CardAlarm.kt
index 71e90ff4..4bc909f2 100644
--- a/app/src/main/java/com/texthip/thip/ui/common/cards/CardAlarm.kt
+++ b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/component/CardAlarm.kt
@@ -1,4 +1,4 @@
-package com.texthip.thip.ui.common.cards
+package com.texthip.thip.ui.common.alarmpage.component
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
@@ -111,18 +111,25 @@ fun CardAlarm(
                         Column(
                             horizontalAlignment = Alignment.End
                         ) {
-                            // 안읽음 상태일 때만 빨간 점
-                            if (!isRead) {
-                                Box(
-                                    modifier = Modifier
-                                        .size(6.dp)
-                                        .clip(RoundedCornerShape(3.dp))
-                                        .background(color = colors.Red)
-                                )
+                            // 빨간 점을 위한 고정 공간 (항상 6dp 높이 유지)
+                            Box(
+                                modifier = Modifier
+                                    .size(6.dp),
+                                contentAlignment = Alignment.Center
+                            ) {
+                                // 안읽음 상태일 때만 빨간 점 표시
+                                if (!isRead) {
+                                    Box(
+                                        modifier = Modifier
+                                            .size(6.dp)
+                                            .clip(RoundedCornerShape(3.dp))
+                                            .background(color = colors.Red)
+                                    )
+                                }
                             }
 
                             Text(
-                                text = timeAgo + stringResource(R.string.time_ago),
+                                text = timeAgo,
                                 style = typography.timedate_r400_s11,
                                 color = if (isRead) colors.Grey02 else colors.Grey01,
                                 modifier = Modifier
@@ -161,7 +168,7 @@ fun PreviewNotificationCards() {
             title = "같이 읽기를 시작했어요!",
             badgeText = "모임",
             message = "한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다.",
-            timeAgo = "12",
+            timeAgo = "12시간 전",
             isRead = isRead
         ) {
             isRead = true
@@ -172,7 +179,7 @@ fun PreviewNotificationCards() {
             title = "같이 읽기를 시작했어요!",
             badgeText = "모임",
             message = "한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다.",
-            timeAgo = "12",
+            timeAgo = "12시간 전",
             isRead = true
         )
 
@@ -180,7 +187,7 @@ fun PreviewNotificationCards() {
             title = "같이 읽기를 시작했어요!",
             badgeText = "피드",
             message = "한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다.",
-            timeAgo = "12",
+            timeAgo = "12시간 전",
             isRead = false
         )
 
@@ -188,7 +195,7 @@ fun PreviewNotificationCards() {
             title = "같이 읽기를 시작했어요!",
             badgeText = "좋아요",
             message = "한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다.",
-            timeAgo = "12",
+            timeAgo = "12시간 전",
             isRead = isRead
         )
 
@@ -196,7 +203,7 @@ fun PreviewNotificationCards() {
             title = "같이 읽기를 시작했어요!",
             badgeText = "댓글",
             message = "한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다. 한줄만 입력이 가능합니다.",
-            timeAgo = "12",
+            timeAgo = "12시간 전",
             isRead = isRead
         )
     }
diff --git a/app/src/main/java/com/texthip/thip/ui/common/alarmpage/screen/AlarmScreen.kt b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/screen/AlarmScreen.kt
index 9d80da0e..3044e2e5 100644
--- a/app/src/main/java/com/texthip/thip/ui/common/alarmpage/screen/AlarmScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/screen/AlarmScreen.kt
@@ -23,7 +23,7 @@ import androidx.compose.ui.unit.dp
 import com.texthip.thip.R
 import com.texthip.thip.ui.common.alarmpage.component.AlarmFilterRow
 import com.texthip.thip.ui.common.alarmpage.mock.AlarmItem
-import com.texthip.thip.ui.common.cards.CardAlarm
+import com.texthip.thip.ui.common.alarmpage.component.CardAlarm
 import com.texthip.thip.ui.common.topappbar.DefaultTopAppBar
 import com.texthip.thip.ui.theme.ThipTheme
 import com.texthip.thip.ui.theme.ThipTheme.colors
diff --git a/app/src/main/java/com/texthip/thip/ui/common/alarmpage/viewmodel/AlarmViewModel.kt b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/viewmodel/AlarmViewModel.kt
index c1e31f27..efa44466 100644
--- a/app/src/main/java/com/texthip/thip/ui/common/alarmpage/viewmodel/AlarmViewModel.kt
+++ b/app/src/main/java/com/texthip/thip/ui/common/alarmpage/viewmodel/AlarmViewModel.kt
@@ -15,7 +15,6 @@ class AlarmViewModel : ViewModel() {
         _alarmItems.value = listOf(
             AlarmItem(1, "피드", "내 글을 좋아합니다.", "user123님이 내 글에 좋아요를 눌렀어요.", "2시간 전", false),
             AlarmItem(2, "모임", "같이 읽기를 시작했어요!", "모임방에서 20분 동안 같이 읽기가 시작되었어요!", "7시간 전", false),
-            AlarmItem(3, "피드", "내 글에 댓글이 달렸어요.", "user1: 진짜 공감합니다!", "2025.01.12", true),
             AlarmItem(4, "모임", "투표가 시작되었어요!", "투표지를 먼저 열람합니다.", "17시간 전", false),
             AlarmItem(5, "피드", "팔로워가 새 글을 올렸어요.", "user456님이 새 리뷰를 작성했습니다.", "1일 전", true),
             AlarmItem(6, "모임", "새로운 모임방 초대", "호르몬 체인지 완독하는 방에 초대되었습니다.", "2일 전", false)
diff --git a/app/src/main/java/com/texthip/thip/ui/feed/component/MySubscribelistBar.kt b/app/src/main/java/com/texthip/thip/ui/feed/component/MySubscribelistBar.kt
index 0315a10c..8037a1b9 100644
--- a/app/src/main/java/com/texthip/thip/ui/feed/component/MySubscribelistBar.kt
+++ b/app/src/main/java/com/texthip/thip/ui/feed/component/MySubscribelistBar.kt
@@ -136,7 +136,7 @@ private fun EmptyMySubscriptionBar() {
         modifier = Modifier
             .fillMaxWidth()
             .height(42.dp)
-            .clip(RoundedCornerShape(8.dp))
+            .clip(RoundedCornerShape(12.dp))
             .background(colors.DarkGrey02)
             .clickable { }
     ) {
diff --git a/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageLeavethipScreen.kt b/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageLeavethipScreen.kt
index 7b6d8172..e5d621c2 100644
--- a/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageLeavethipScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageLeavethipScreen.kt
@@ -1,5 +1,6 @@
 package com.texthip.thip.ui.mypage.screen
 
+import android.widget.Toast
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
@@ -12,15 +13,18 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.SpanStyle
@@ -29,10 +33,13 @@ import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.texthip.thip.R
 import com.texthip.thip.ui.common.buttons.CheckboxButton
 import com.texthip.thip.ui.common.modal.DialogPopup
 import com.texthip.thip.ui.common.topappbar.DefaultTopAppBar
+import com.texthip.thip.ui.mypage.viewmodel.DeleteAccountViewModel
 import com.texthip.thip.ui.theme.DarkGrey02
 import com.texthip.thip.ui.theme.Red
 import com.texthip.thip.ui.theme.ThipTheme.colors
@@ -40,11 +47,30 @@ import com.texthip.thip.ui.theme.ThipTheme.typography
 
 @Composable
 fun DeleteAccountScreen(
-    onNavigateBack: () -> Unit
+    onNavigateBack: () -> Unit,
+    onNavigateToLogin: () -> Unit,
+    viewModel: DeleteAccountViewModel = hiltViewModel()
 ) {
+    val context = LocalContext.current
+    val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
+    
     var isChecked by rememberSaveable { mutableStateOf(false) }
     val backgroundColor = if (isChecked) colors.Purple else colors.Grey02
     var isDialogVisible by rememberSaveable { mutableStateOf(false) }
+    
+    // 회원탈퇴 완료 시 로그인 화면으로 이동
+    LaunchedEffect(uiState.isDeleteCompleted) {
+        if (uiState.isDeleteCompleted) {
+            onNavigateToLogin()
+        }
+    }
+    
+    // 에러 메시지 표시
+    LaunchedEffect(uiState.errorMessage) {
+        uiState.errorMessage?.let { message ->
+            Toast.makeText(context, message, Toast.LENGTH_SHORT).show()
+        }
+    }
 
     Column(
         Modifier
@@ -159,12 +185,22 @@ fun DeleteAccountScreen(
                         onCancel = { isDialogVisible = false },
                         onConfirm = {
                             isDialogVisible = false
-                            // TODO: 회원탈퇴 로직
+                            viewModel.deleteAccount(context)
                         }
                     )
                 }
             }
         }
+        
+        // 로딩 중일 때 전체 화면에 로딩 인디케이터 표시
+        if (uiState.isLoading) {
+            Box(
+                modifier = Modifier.fillMaxSize(),
+                contentAlignment = Alignment.Center
+            ) {
+                CircularProgressIndicator()
+            }
+        }
     }
 }
 
@@ -172,6 +208,7 @@ fun DeleteAccountScreen(
 @Composable
 private fun DeleteAccountScreenPrev() {
     DeleteAccountScreen(
-        onNavigateBack = {}
+        onNavigateBack = {},
+        onNavigateToLogin = {}
     )
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageReactionScreen.kt b/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageReactionScreen.kt
index d4b33d78..d41a5d88 100644
--- a/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageReactionScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/mypage/screen/MypageReactionScreen.kt
@@ -9,7 +9,6 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -24,7 +23,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.texthip.thip.R
 import com.texthip.thip.ui.common.buttons.OptionChipButton
-import com.texthip.thip.ui.common.cards.CardAlarm
+import com.texthip.thip.ui.common.alarmpage.component.CardAlarm
 import com.texthip.thip.ui.common.topappbar.DefaultTopAppBar
 import com.texthip.thip.ui.mypage.mock.ReactionItem
 import com.texthip.thip.ui.theme.ThipTheme
diff --git a/app/src/main/java/com/texthip/thip/ui/mypage/viewmodel/DeleteAccountViewModel.kt b/app/src/main/java/com/texthip/thip/ui/mypage/viewmodel/DeleteAccountViewModel.kt
new file mode 100644
index 00000000..ca342618
--- /dev/null
+++ b/app/src/main/java/com/texthip/thip/ui/mypage/viewmodel/DeleteAccountViewModel.kt
@@ -0,0 +1,70 @@
+package com.texthip.thip.ui.mypage.viewmodel
+
+import android.content.Context
+import android.util.Log
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.google.android.gms.auth.api.signin.GoogleSignIn
+import com.google.android.gms.auth.api.signin.GoogleSignInOptions
+import com.kakao.sdk.user.UserApiClient
+import com.texthip.thip.data.manager.TokenManager
+import com.texthip.thip.data.repository.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+data class DeleteAccountUiState(
+    val isLoading: Boolean = false,
+    val isDeleteCompleted: Boolean = false,
+    val errorMessage: String? = null
+)
+
+@HiltViewModel
+class DeleteAccountViewModel @Inject constructor(
+    private val userRepository: UserRepository,
+    private val tokenManager: TokenManager
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow(DeleteAccountUiState())
+    val uiState = _uiState.asStateFlow()
+
+    fun deleteAccount(context: Context) {
+        viewModelScope.launch {
+            _uiState.update { it.copy(isLoading = true, errorMessage = null) }
+            
+            // 1. 서버에 회원탈퇴 요청
+            userRepository.deleteAccount()
+                .onSuccess {
+                    // 2. 서버 요청 성공 후 토큰 삭제
+                    tokenManager.clearTokens()
+                    
+                    // 3. 카카오 SDK에서 연결 끊기
+                    UserApiClient.instance.unlink { error ->
+                        if (error != null) {
+                            Log.e("DeleteAccountViewModel", "카카오 연결 끊기 실패", error)
+                        } else {
+                            Log.d("DeleteAccountViewModel", "카카오 연결 끊기 성공")
+                        }
+                    }
+                    
+                    // 4. 구글 SDK에서 로그아웃
+                    val gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).build()
+                    GoogleSignIn.getClient(context, gso).signOut()
+                    
+                    _uiState.update { it.copy(isLoading = false, isDeleteCompleted = true) }
+                }
+                .onFailure { exception ->
+                    Log.e("DeleteAccountViewModel", "회원탈퇴 실패", exception)
+                    _uiState.update { 
+                        it.copy(
+                            isLoading = false, 
+                            errorMessage = exception.message ?: "회원탈퇴에 실패했습니다."
+                        ) 
+                    }
+                }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/navigator/navigations/MyPageNavigation.kt b/app/src/main/java/com/texthip/thip/ui/navigator/navigations/MyPageNavigation.kt
index 9490615d..879b9505 100644
--- a/app/src/main/java/com/texthip/thip/ui/navigator/navigations/MyPageNavigation.kt
+++ b/app/src/main/java/com/texthip/thip/ui/navigator/navigations/MyPageNavigation.kt
@@ -59,7 +59,8 @@ fun NavGraphBuilder.myPageNavigation(
     }
     composable<MyPageRoutes.LeaveThip> {
         DeleteAccountScreen(
-            onNavigateBack = { navController.popBackStack() }
+            onNavigateBack = { navController.popBackStack() },
+            onNavigateToLogin = onNavigateToLogin
         )
     }
     composable<MyPageRoutes.CustomerService> {
diff --git a/app/src/main/java/com/texthip/thip/ui/search/screen/SearchBookDetailScreen.kt b/app/src/main/java/com/texthip/thip/ui/search/screen/SearchBookDetailScreen.kt
index 86c2d61a..334792e6 100644
--- a/app/src/main/java/com/texthip/thip/ui/search/screen/SearchBookDetailScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/search/screen/SearchBookDetailScreen.kt
@@ -53,6 +53,7 @@ import com.texthip.thip.ui.common.buttons.ActionMediumButton
 import com.texthip.thip.ui.common.modal.InfoPopup
 import com.texthip.thip.ui.common.topappbar.GradationTopAppBar
 import com.texthip.thip.ui.mypage.component.SavedFeedCard
+import com.texthip.thip.ui.mypage.mock.FeedItem
 import com.texthip.thip.ui.search.component.SearchFilterButton
 import com.texthip.thip.ui.search.component.SearchFilterDropdownOverlay
 import com.texthip.thip.ui.search.viewmodel.BookDetailUiState
@@ -398,7 +399,7 @@ private fun SearchBookDetailScreenContent(
                             Box(
                                 modifier = Modifier
                                     .fillMaxWidth()
-                                    .height(30.dp)
+                                    .height(40.dp)
                                     .background(
                                         brush = Brush.verticalGradient(
                                             colors = listOf(
@@ -459,7 +460,7 @@ private fun SearchBookDetailScreenContent(
                         ) { index, feedItem ->
                             val relatedFeedItem = uiState?.relatedFeeds?.getOrNull(index)
 
-                            Spacer(modifier = Modifier.height(if (index == 0) 20.dp else 40.dp))
+                            Spacer(modifier = Modifier.height(if (index == 0) 0.dp else 40.dp))
 
                             SavedFeedCard(
                                 feedItem = feedItem,
@@ -574,6 +575,99 @@ fun SearchBookDetailScreenContentSavedPreview() {
     }
 }
 
+@Preview(showBackground = true)
+@Composable
+fun SearchBookDetailScreenContentWithFeedsPreview() {
+    val mockFeedItems = listOf(
+        FeedItem(
+            id = 1L,
+            userProfileImage = "https://example.com/profile1.jpg",
+            userName = "책읽는사람",
+            userRole = "문학 애호가",
+            bookTitle = "데미안",
+            authName = "헤르만 헤세",
+            timeAgo = "2시간 전",
+            content = "이 책을 읽으면서 진정한 자아를 찾아가는 과정에 대해 많은 생각을 하게 되었습니다. 싱클레어의 성장 과정이 현재의 나와 많이 닮아있다고 느꼈어요.",
+            likeCount = 24,
+            commentCount = 8,
+            isLiked = true,
+            isSaved = false,
+            imageUrls = listOf("https://example.com/image1.jpg")
+        ),
+        FeedItem(
+            id = 2L,
+            userProfileImage = "https://example.com/profile2.jpg",
+            userName = "철학독서가",
+            userRole = "인문학 탐구자",
+            bookTitle = "데미안",
+            authName = "헤르만 헤세",
+            timeAgo = "5시간 전",
+            content = "헤세의 작품 중에서도 가장 깊이 있는 성찰을 담고 있는 작품이라고 생각합니다. 선악을 넘어선 인간 내면의 복잡성을 이해하는 데 큰 도움이 되었습니다.",
+            likeCount = 18,
+            commentCount = 12,
+            isLiked = false,
+            isSaved = true,
+            imageUrls = emptyList()
+        ),
+        FeedItem(
+            id = 3L,
+            userProfileImage = "https://example.com/profile3.jpg",
+            userName = "문학소녀",
+            userRole = "소설 리뷰어",
+            bookTitle = "데미안",
+            authName = "헤르만 헤세",
+            timeAgo = "1일 전",
+            content = "청소년기에 읽었을 때와 성인이 되어 다시 읽었을 때의 감상이 완전히 달랐습니다. 나이가 들수록 더 깊이 이해되는 작품이네요.\n\n특히 데미안이라는 인물이 주는 메시지가 인상 깊었어요.",
+            likeCount = 31,
+            commentCount = 15,
+            isLiked = true,
+            isSaved = true,
+            imageUrls = listOf(
+                "https://example.com/image2.jpg",
+                "https://example.com/image3.jpg"
+            )
+        )
+    )
+
+    val mockUiState = BookDetailUiState(
+        bookDetail = mockBookDetail,
+        relatedFeeds = emptyList(), // feedItems로 변환되므로 빈 리스트
+        isLoadingFeeds = false,
+        isLoadingMore = false,
+        currentSort = "like"
+    ).copy(
+        // feedItems를 직접 설정하기 위해 relatedFeeds를 임시로 설정
+        relatedFeeds = mockFeedItems.map { feedItem ->
+            com.texthip.thip.data.model.feed.response.RelatedFeedItem(
+                feedId = feedItem.id.toInt(),
+                creatorId = feedItem.id.toInt(),
+                creatorNickname = feedItem.userName,
+                creatorProfileImageUrl = feedItem.userProfileImage,
+                aliasName = feedItem.userRole,
+                aliasColor = "#FF6B9D",
+                postDate = feedItem.timeAgo,
+                isbn = mockBookDetail.isbn,
+                bookTitle = feedItem.bookTitle,
+                bookAuthor = feedItem.authName,
+                contentBody = feedItem.content,
+                contentUrls = feedItem.imageUrls,
+                likeCount = feedItem.likeCount,
+                commentCount = feedItem.commentCount,
+                isSaved = feedItem.isSaved,
+                isLiked = feedItem.isLiked,
+                isWriter = false
+            )
+        }
+    )
+
+    ThipTheme {
+        SearchBookDetailScreenContent(
+            bookDetail = mockBookDetail,
+            uiState = mockUiState
+        )
+    }
+}
+
 @Preview(showBackground = true)
 @Composable
 fun SearchBookDetailScreenContentErrorPreview() {
diff --git a/app/src/main/java/com/texthip/thip/utils/auth/AuthInterceptor.kt b/app/src/main/java/com/texthip/thip/utils/auth/AuthInterceptor.kt
index 71e9f700..8d5865e4 100644
--- a/app/src/main/java/com/texthip/thip/utils/auth/AuthInterceptor.kt
+++ b/app/src/main/java/com/texthip/thip/utils/auth/AuthInterceptor.kt
@@ -1,5 +1,6 @@
 package com.texthip.thip.utils.auth
 
+import com.texthip.thip.data.manager.AuthStateManager
 import com.texthip.thip.data.manager.TokenManager
 import kotlinx.coroutines.runBlocking
 import okhttp3.Interceptor
@@ -7,7 +8,8 @@ import okhttp3.Response
 import javax.inject.Inject
 
 class AuthInterceptor @Inject constructor(
-    private val tokenManager: TokenManager
+    private val tokenManager: TokenManager,
+    private val authStateManager: AuthStateManager
 ) : Interceptor {
     override fun intercept(chain: Interceptor.Chain): Response {
         val original = chain.request()
@@ -16,18 +18,25 @@ class AuthInterceptor @Inject constructor(
             return chain.proceed(original)
         }
 
-        // 1. 정식 토큰을 먼저 확인합니다.
         val token = runBlocking { tokenManager.getTokenOnce() }
-        // 2. 정식 토큰이 없으면, 임시 토큰을 확인합니다.
         val tempToken = runBlocking { tokenManager.getTempTokenOnce() }
 
-        // 보낼 토큰을 결정합니다 (정식 토큰 우선).
         val tokenToSend = token ?: tempToken
 
         val newRequest = original.newBuilder().apply {
             tokenToSend?.let { addHeader("Authorization", "Bearer $it") }
         }.build()
 
-        return chain.proceed(newRequest)
+        val response = chain.proceed(newRequest)
+        
+        // 401 응답 처리
+        if (response.code == 401) {
+            runBlocking {
+                tokenManager.clearTokens()
+                authStateManager.triggerTokenExpired()
+            }
+        }
+
+        return response
     }
 }