fix: IME layout, message dedup, animation order, and overlay input positioning

- ChatScreen: restructure to Box overlay layout so only input area
  rises with IME, messages stay fixed. Add opaque background to input
  area. Use reverseLayout with newest-first animation order.
- OverlayContent: remove all manual IME detection — system forces
  adjust=pan on VoiceInteractionSession windows, so manual padding
  caused double offset. Let system handle IME naturally.
- ChatRepositoryImpl: add messageRemovals flow to clean up wrapping
  stream_end/response when review/multi_message items arrive later.
  Track lastResponseId in both stream_end and response handlers.
- ChatViewModel/OverlayViewModel: fix dedup to check by message ID
  only. Sort descending (newest first). Observe messageRemovals.
- NavGraph: keep all tabs composed with graphicsLayer alpha toggle —
  prevents ChatScreen destruction and re-render on tab switch.
- CyreneVoiceInteractionSession: defer configureWindow via post()
  to override system softInputMode flags.
- AndroidManifest: set windowSoftInputMode=adjustNothing on main
  activity.
- Add WebSocketKeepAliveService for background connection persistence.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/proguard-rules.pro

@@ -11,7 +11,14 @@
 -keepattributes Signature
 -keepattributes InnerClasses
 -keepattributes EnclosingMethod
+-keepattributes RuntimeVisibleAnnotations
+-keepattributes RuntimeVisibleParameterAnnotations
+-keepattributes AnnotationDefault
+-keepattributes KotlinMetadata
 -dontwarn kotlin.**
+-keep class kotlin.Metadata { *; }
+-keep class kotlin.coroutines.Continuation
+-keep class kotlinx.coroutines.** { *; }
 
 # --- Retrofit ---
 -keep class retrofit2.** { *; }
@@ -63,6 +70,28 @@
 # --- Keep PreferencesDataStore (Koin injects) ---
 -keep class top.yeij.cyrene.data.local.PreferencesDataStore { *; }
 
+# --- Keep utility classes (VoiceRecorder, RuntimeLog, etc. — injected by Koin) ---
+-keep class top.yeij.cyrene.util.** { *; }
+-keepclassmembers class top.yeij.cyrene.util.** { *; }
+
+# --- Keep voice/TTS/STT classes (injected by Koin into OverlayViewModel) ---
+-keep class top.yeij.cyrene.voice.** { *; }
+-keepclassmembers class top.yeij.cyrene.voice.** { *; }
+
+# --- Keep domain use cases (injected by Koin into ViewModels) ---
+-keep class top.yeij.cyrene.domain.usecase.** { *; }
+-keepclassmembers class top.yeij.cyrene.domain.usecase.** { *; }
+
+# --- Keep network interceptors and ApiService (Koin singletons) ---
+-keep class top.yeij.cyrene.data.remote.RetrofitClient { *; }
+-keep class top.yeij.cyrene.data.remote.ApiService { *; }
+-keep class top.yeij.cyrene.data.remote.AuthInterceptor { *; }
+-keep class top.yeij.cyrene.data.remote.DynamicUrlInterceptor { *; }
+-keep class top.yeij.cyrene.data.remote.TokenAuthenticator { *; }
+
+# --- Keep WebSocketService (injected into ChatRepositoryImpl) ---
+-keep class top.yeij.cyrene.service.WebSocketService { *; }
+
 # --- General AndroidX ---
 -keep class androidx.lifecycle.** { *; }
 -dontwarn androidx.lifecycle.**

app/src/main/AndroidManifest.xml

@@ -14,6 +14,7 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
 
     <!-- 推送 -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
@@ -42,6 +43,7 @@
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTask"
+            android:windowSoftInputMode="adjustNothing"
             android:theme="@style/Theme.Cyrene">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -83,6 +85,12 @@
                 android:resource="@xml/accessibility_config" />
         </service>
 
+        <!-- WebSocket 后台保活 -->
+        <service
+            android:name=".service.WebSocketKeepAliveService"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
+
         <!-- FileProvider：日志分享 -->
         <provider
             android:name="androidx.core.content.FileProvider"

app/src/main/java/top/yeij/cyrene/CyreneApplication.kt

@@ -89,7 +89,7 @@ class CyreneApplication : Application() {
     private fun getRepo(): ChatRepositoryImpl? {
         return try {
             GlobalContext.get().get()
-        } catch (_: Exception) {
+        } catch (_: Throwable) {
             null
         }
     }

app/src/main/java/top/yeij/cyrene/data/repository/ChatRepositoryImpl.kt

@@ -1,5 +1,6 @@
 package top.yeij.cyrene.data.repository
 
+import android.app.Application
 import android.util.Log
 import kotlinx.coroutines.CoroutineExceptionHandler
 import kotlinx.coroutines.CoroutineScope
@@ -26,11 +27,13 @@ import top.yeij.cyrene.data.remote.dto.WSServerMessage
 import top.yeij.cyrene.domain.model.Conversation
 import top.yeij.cyrene.domain.model.Message
 import top.yeij.cyrene.domain.repository.ChatRepository
+import top.yeij.cyrene.service.WebSocketKeepAliveService
 import top.yeij.cyrene.service.WebSocketService
 import top.yeij.cyrene.util.RuntimeLog
 import java.util.UUID
 
 class ChatRepositoryImpl(
+    private val app: Application,
     private val conversationDao: ConversationDao,
     private val messageDao: MessageDao,
     private val webSocketService: WebSocketService,
@@ -54,6 +57,9 @@ class ChatRepositoryImpl(
     private val _messageClearEvents = MutableSharedFlow<Unit>(extraBufferCapacity = 4)
     override val messageClearEvents: Flow<Unit> = _messageClearEvents
 
+    private val _messageRemovals = MutableSharedFlow<String>(extraBufferCapacity = 16)
+    override val messageRemovals: Flow<String> = _messageRemovals
+
     private val _isAssistantStreaming = MutableStateFlow(false)
     override val isAssistantStreaming: StateFlow<Boolean> = _isAssistantStreaming.asStateFlow()
 
@@ -81,19 +87,22 @@ class ChatRepositoryImpl(
     override fun onAppForeground() {
         isAppInForeground = true
         notifiedMessageIds.clear()
-        if (!_connectionState.value) {
+        WebSocketKeepAliveService.stop(app)
-            webSocketService.forceReconnect()
+        // Always reconnect and sync history when returning to foreground
-        }
+        webSocketService.forceReconnect()
-        // Always request history on foreground to catch cross-device messages
         scope.launch {
             val sid = currentSessionId ?: return@launch
-            RuntimeLog.general("app", "Foreground — requesting history for session=$sid")
+            RuntimeLog.general("app", "Foreground — reconnecting and requesting history for session=$sid")
             requestHistoryViaWs(sid)
         }
     }
 
     override fun onAppBackground() {
         isAppInForeground = false
+        if (_connectionState.value) {
+            WebSocketKeepAliveService.start(app)
+            RuntimeLog.general("app", "Started keep-alive service for background")
+        }
     }
 
     init {
@@ -148,17 +157,6 @@ class ChatRepositoryImpl(
         messageDao.deleteAll()
         preferencesDataStore.saveLastClearedTimestamp(now)
 
-        // Also clear server-side messages for all known sessions
-        try {
-            val sessions = conversationDao.getAllSnapshot()
-            sessions.forEach { session ->
-                try {
-                    apiService.clearSessionMessages(session.id)
-                    RuntimeLog.chat("clear", "Server messages cleared for session=${session.id}")
-                } catch (_: Exception) { }
-            }
-        } catch (_: Exception) { }
-
         _messageClearEvents.tryEmit(Unit)
 
         RuntimeLog.chat("clear", "Local messages cleared, timestamp=$now")
@@ -378,6 +376,7 @@ class ChatRepositoryImpl(
                 streamingContent = ""
                 streamingMessageId = wsMsg.messageId ?: "stream_${System.currentTimeMillis()}"
                 _isAssistantStreaming.value = true
+                recentParsedContents.clear()
                 RuntimeLog.chat("stream", "Stream start msgId=$streamingMessageId")
             }
 
@@ -405,6 +404,19 @@ class ChatRepositoryImpl(
                 }
                 val ts = wsMsg.timestamp ?: System.currentTimeMillis()
 
+                // Dedup: suppress if streaming content wraps already-shown multi_message/review items
+                val timeSinceParsed = System.currentTimeMillis() - lastParsedTime
+                if (timeSinceParsed < 3000 && recentParsedContents.isNotEmpty()) {
+                    val allContained = recentParsedContents.all { content.contains(it) }
+                    if (allContained) {
+                        RuntimeLog.chat("dedup", "Suppressed stream_end wrapping, ${recentParsedContents.size} items already shown")
+                        recentParsedContents.clear()
+                        _isAssistantStreaming.value = false
+                        return
+                    }
+                }
+                recentParsedContents.clear()
+
                 if (content.isNotBlank()) {
                     ensureConversation(sid, content)
                     messageDao.upsert(
@@ -419,6 +431,10 @@ class ChatRepositoryImpl(
                     )
                 }
 
+                lastResponseId = msgId
+                lastResponseContent = content
+                lastResponseTime = System.currentTimeMillis()
+
                 emitMessage(id = msgId, sessionId = sid, role = "assistant", content = content, msgType = "chat", timestamp = ts, isStreaming = false, shouldNotify = true)
                 _isAssistantStreaming.value = false
                 RuntimeLog.chat("stream", "Stream end msgId=$msgId content=${content.take(80)}")
@@ -616,7 +632,8 @@ class ChatRepositoryImpl(
         val allContained = recentParsedContents.all { respContent.contains(it) }
         if (allContained) {
             messageDao.deleteById(respId)
-            RuntimeLog.chat("dedup", "Cleaned up wrapping response from DB id=$respId")
+            _messageRemovals.tryEmit(respId)
+            RuntimeLog.chat("dedup", "Cleaned up wrapping response from DB and live state id=$respId")
         }
     }
 

app/src/main/java/top/yeij/cyrene/di/AppModule.kt

@@ -63,7 +63,7 @@ val appModule = module {
 
     // Repositories
     single<AuthRepository> { AuthRepositoryImpl(get(), get(), get()) }
-    single<ChatRepository> { ChatRepositoryImpl(get(), get(), get(), get(), get()) }
+    single<ChatRepository> { ChatRepositoryImpl(androidContext() as android.app.Application, get(), get(), get(), get(), get()) }
     single<IoTRepository> { IoTRepositoryImpl(get(), get()) }
 
     // UseCases

app/src/main/java/top/yeij/cyrene/domain/repository/ChatRepository.kt

@@ -11,6 +11,7 @@ interface ChatRepository {
     val connectionError: StateFlow<String?>
     val isAssistantStreaming: StateFlow<Boolean>
     val messageClearEvents: Flow<Unit>
+    val messageRemovals: Flow<String>
     var currentSessionId: String?
 
     fun getConversations(): Flow<List<Conversation>>

app/src/main/java/top/yeij/cyrene/service/CyreneVoiceInteractionSession.kt

@@ -48,7 +48,7 @@ class CyreneVoiceInteractionSession(context: Context) :
     private fun resolveViewModel(): OverlayViewModel? {
         return try {
             GlobalContext.get().get<OverlayViewModel>()
-        } catch (e: Exception) {
+        } catch (e: Throwable) {
             Log.e(TAG, "Failed to resolve OverlayViewModel from Koin", e)
             null
         }
@@ -65,9 +65,17 @@ class CyreneVoiceInteractionSession(context: Context) :
 
         lifecycleRegistry.currentState = Lifecycle.State.CREATED
         val vm = overlayViewModel
+        val session = this@CyreneVoiceInteractionSession
         return ComposeView(context).apply {
-            setViewTreeLifecycleOwner(this@CyreneVoiceInteractionSession)
+            // Configure window as soon as view is attached — before system overrides flags
-            setViewTreeSavedStateRegistryOwner(this@CyreneVoiceInteractionSession)
+            addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
+                override fun onViewAttachedToWindow(v: View) {
+                    session.configureWindow()
+                }
+                override fun onViewDetachedFromWindow(v: View) {}
+            })
+            setViewTreeLifecycleOwner(session)
+            setViewTreeSavedStateRegistryOwner(session)
             setContent {
                 CyreneTheme {
                     if (vm != null) {
@@ -92,14 +100,22 @@ class CyreneVoiceInteractionSession(context: Context) :
         RuntimeLog.general("overlay", "onShow, vm=${overlayViewModel != null}")
         lifecycleRegistry.currentState = Lifecycle.State.STARTED
 
-        // Configure window: extend behind status bar, don't resize for IME
+        // Defer window config — system may override softInputMode after onShow returns
-        configureWindow()
+        try {
+            val method = VoiceInteractionSession::class.java.getDeclaredMethod("getWindow")
+            method.isAccessible = true
+            val w = method.invoke(this) as? android.view.Window
+            w?.decorView?.post { configureWindow() }
+        } catch (e: Throwable) {
+            // Fallback: configure immediately
+            configureWindow()
+        }
 
         // Only read screen content if user enabled it in settings (default off)
         val autoScreenContext = try {
             val prefs: PreferencesDataStore = GlobalContext.get().get()
             runBlocking { prefs.autoScreenContext.firstOrNull() } ?: false
-        } catch (_: Exception) {
+        } catch (_: Throwable) {
             false
         }
         if (autoScreenContext) {
@@ -111,16 +127,18 @@ class CyreneVoiceInteractionSession(context: Context) :
         }
     }
 
-    private fun configureWindow() {
+    fun configureWindow() {
         try {
             val method = VoiceInteractionSession::class.java.getDeclaredMethod("getWindow")
             method.isAccessible = true
             val w = method.invoke(this) as? android.view.Window ?: return
+            // Transparent window so the underlying screen is visible through the overlay
+            w.setBackgroundDrawable(android.graphics.drawable.ColorDrawable(android.graphics.Color.TRANSPARENT))
             w.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
             w.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
             w.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
-            Log.d(TAG, "Window configured: translucent status/nav, adjust nothing for IME")
+            Log.d(TAG, "Window configured: transparent bg, translucent status/nav")
-        } catch (e: Exception) {
+        } catch (e: Throwable) {
             Log.w(TAG, "Failed to configure window: ${e.message}")
         }
     }

app/src/main/java/top/yeij/cyrene/service/WebSocketKeepAliveService.kt

@@ -0,0 +1,84 @@
+package top.yeij.cyrene.service
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.IBinder
+import androidx.core.app.NotificationCompat
+import top.yeij.cyrene.MainActivity
+
+class WebSocketKeepAliveService : Service() {
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        isRunning = true
+        createChannel()
+    }
+
+    override fun onDestroy() {
+        isRunning = false
+        super.onDestroy()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        val pendingIntent = PendingIntent.getActivity(
+            this, 0,
+            Intent(this, MainActivity::class.java).apply {
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+        )
+
+        val notification = NotificationCompat.Builder(this, CHANNEL_ID)
+            .setSmallIcon(android.R.drawable.ic_dialog_info)
+            .setContentTitle("昔涟")
+            .setContentText("已连接，可在后台接收消息")
+            .setOngoing(true)
+            .setContentIntent(pendingIntent)
+            .setPriority(NotificationCompat.PRIORITY_LOW)
+            .build()
+
+        startForeground(NOTIFICATION_ID, notification)
+        return START_STICKY
+    }
+
+    private fun createChannel() {
+        val channel = NotificationChannel(
+            CHANNEL_ID,
+            "连接状态",
+            NotificationManager.IMPORTANCE_LOW,
+        ).apply {
+            description = "后台连接保活"
+            setShowBadge(false)
+        }
+        val nm = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        nm.createNotificationChannel(channel)
+    }
+
+    companion object {
+        private const val CHANNEL_ID = "cyrene_keepalive"
+        private const val NOTIFICATION_ID = 1
+
+        @Volatile
+        var isRunning: Boolean = false
+            private set
+
+        fun start(context: Context) {
+            if (isRunning) return
+            context.startForegroundService(
+                Intent(context, WebSocketKeepAliveService::class.java)
+            )
+        }
+
+        fun stop(context: Context) {
+            context.stopService(
+                Intent(context, WebSocketKeepAliveService::class.java)
+            )
+        }
+    }
+}

app/src/main/java/top/yeij/cyrene/service/WebSocketService.kt

@@ -244,11 +244,14 @@ class WebSocketService(
         reconnectJob?.cancel()
         reconnectJob = null
         scope.launch {
-            if (!_isConnected.value) {
+            try {
-                try {
+                // Close existing socket directly without resetting shouldReconnect
-                    connect(currentSessionId)
+                cancelHeartbeat()
-                } catch (_: Exception) { }
+                webSocket?.close(1000, "Reconnecting")
-            }
+                webSocket = null
+                _isConnected.value = false
+                connect(currentSessionId)
+            } catch (_: Exception) { }
         }
     }
 

app/src/main/java/top/yeij/cyrene/ui/navigation/NavGraph.kt

@@ -21,6 +21,7 @@ import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.graphicsLayer
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
@@ -29,6 +30,7 @@ import top.yeij.cyrene.ui.screens.iot.IoTScreen
 import top.yeij.cyrene.ui.screens.login.LoginScreen
 import top.yeij.cyrene.ui.screens.about.AboutScreen
 import top.yeij.cyrene.ui.screens.profile.ProfileScreen
+import top.yeij.cyrene.ui.screens.settings.KeepAlivePage
 import top.yeij.cyrene.ui.screens.settings.SettingsScreen
 
 object Routes {
@@ -38,6 +40,7 @@ object Routes {
     const val IOT = "iot"
     const val SETTINGS = "settings"
     const val ABOUT = "about"
+    const val KEEP_ALIVE = "keep_alive"
 }
 
 @Composable
@@ -72,6 +75,13 @@ fun CyreneNavGraph(
         composable(Routes.SETTINGS) {
             SettingsScreen(
                 onBack = { navController.popBackStack() },
+                onNavigateToKeepAlive = { navController.navigate(Routes.KEEP_ALIVE) },
+            )
+        }
+
+        composable(Routes.KEEP_ALIVE) {
+            KeepAlivePage(
+                onBack = { navController.popBackStack() },
             )
         }
 
@@ -137,10 +147,28 @@ fun MainScreen(
                 .fillMaxHeight()
                 .background(MaterialTheme.colorScheme.background),
         ) {
-            when (selectedTab) {
+            // Keep all tabs composed to avoid destroying ChatScreen on tab switch.
-                0 -> ChatScreen()
+            // Hidden tabs use graphicsLayer { alpha = 0f } — invisible but alive.
-                1 -> IoTScreen()
+            Box(
-                2 -> ProfileScreen(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .graphicsLayer { alpha = if (selectedTab == 0) 1f else 0f },
+            ) {
+                ChatScreen()
+            }
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .graphicsLayer { alpha = if (selectedTab == 1) 1f else 0f },
+            ) {
+                IoTScreen()
+            }
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .graphicsLayer { alpha = if (selectedTab == 2) 1f else 0f },
+            ) {
+                ProfileScreen(
                     onNavigateToSettings = { navController.navigate(Routes.SETTINGS) },
                     onNavigateToAbout = { navController.navigate(Routes.ABOUT) },
                     onLogout = {

app/src/main/java/top/yeij/cyrene/ui/overlay/OverlayContent.kt

@@ -1,6 +1,7 @@
 package top.yeij.cyrene.ui.overlay
 
 import android.content.res.Configuration
+
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.slideInVertically
@@ -17,7 +18,6 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
@@ -41,9 +41,11 @@ import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -54,6 +56,7 @@ import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
+
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
@@ -188,6 +191,7 @@ fun OverlayContent(
                     onDismiss = onDismiss,
                     onNavigateToMain = onNavigateToMain,
                     viewModel = viewModel,
+                    navBarHeightPx = navBarHeight,
                 )
             } else {
                 PortraitContent(
@@ -204,6 +208,7 @@ fun OverlayContent(
                     onDismiss = onDismiss,
                     onNavigateToMain = onNavigateToMain,
                     viewModel = viewModel,
+                    navBarHeightPx = navBarHeight,
                 )
             }
         }
@@ -226,6 +231,7 @@ private fun PortraitContent(
     onDismiss: () -> Unit,
     onNavigateToMain: () -> Unit,
     viewModel: OverlayViewModel,
+    navBarHeightPx: Int,
 ) {
     Box(
         modifier = Modifier
@@ -261,15 +267,14 @@ private fun PortraitContent(
             }
         }
 
-        // Input area at bottom, imePadding pushes it above full-screen IME
+        // Input area at bottom; system adjust=pan handles IME offset
         InputArea(
             state = state,
             inputText = inputText,
             viewModel = viewModel,
             modifier = Modifier
                 .align(Alignment.BottomCenter)
-                .fillMaxWidth()
+                .fillMaxWidth(),
-                .imePadding(),
             recordSec = recordSec,
             isRecording = isRecording,
             isLocked = isLocked,
@@ -294,6 +299,7 @@ private fun LandscapeContent(
     onDismiss: () -> Unit,
     onNavigateToMain: () -> Unit,
     viewModel: OverlayViewModel,
+    navBarHeightPx: Int,
 ) {
     Row(
         modifier = Modifier
@@ -346,8 +352,7 @@ private fun LandscapeContent(
                 inputText = inputText,
                 viewModel = viewModel,
                 modifier = Modifier
-                    .fillMaxWidth()
+                    .fillMaxWidth(),
-                    .imePadding(),
                 recordSec = recordSec,
                 isRecording = isRecording,
                 isLocked = isLocked,
@@ -406,7 +411,7 @@ private fun InputArea(
         modifier = modifier.fillMaxWidth(),
         shape = RoundedCornerShape(topStart = 24.dp, topEnd = 24.dp),
         shadowElevation = 8.dp,
-        color = MaterialTheme.colorScheme.surface,
+        color = MaterialTheme.colorScheme.surface.copy(alpha = 0.92f),
     ) {
         Column(
             modifier = Modifier

app/src/main/java/top/yeij/cyrene/ui/screens/chat/ChatScreen.kt

@@ -11,13 +11,15 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.statusBarsPadding
 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.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -32,16 +34,17 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -102,8 +105,19 @@ fun ChatScreen(
     val recordState by viewModel.voiceRecordState.collectAsState()
     val recordDurationMs by viewModel.voiceRecordDurationMs.collectAsState()
     val animIndex by viewModel.messageAnimIndex.collectAsState()
+
+    // reverseLayout: index 0 = newest (visual bottom), index N-1 = oldest (visual top)
     val listState = rememberLazyListState()
 
+    // Track whether user is near the latest messages (visual bottom = index 0)
+    val isNearBottom by remember {
+        derivedStateOf {
+            val info = listState.layoutInfo
+            if (info.totalItemsCount == 0) return@derivedStateOf true
+            (info.visibleItemsInfo.firstOrNull()?.index ?: 0) <= 2
+        }
+    }
+
     // Gesture tracking state
     var isDragging by remember { mutableStateOf(false) }
     var dragOffsetX by remember { mutableStateOf(0f) }
@@ -116,11 +130,14 @@ fun ChatScreen(
     val inCancelZone = isDragging && dragOffsetY < -120f
     val inLockZone = isDragging && dragOffsetX > 60f
 
-    LaunchedEffect(messages.size, isStreaming) {
+    // Stay at bottom for new messages unless user scrolled up
-        if (messages.isNotEmpty()) {
+    LaunchedEffect(Unit) {
-            val targetIndex = if (isStreaming) messages.size else messages.size - 1
+        snapshotFlow { messages.size to isNearBottom }
-            listState.animateScrollToItem(targetIndex)
+            .collect { (_, nearBottom) ->
-        }
+                if (nearBottom && listState.firstVisibleItemIndex != 0) {
+                    listState.animateScrollToItem(0)
+                }
+            }
     }
 
     // Animated "昔涟正在输入..." dots
@@ -145,8 +162,14 @@ fun ChatScreen(
         else -> CyreneStatus.OFFLINE
     }
 
-    Scaffold(
+    // Input area overlaid at bottom, with IME padding so only input moves up
-        topBar = {
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .statusBarsPadding(),
+    ) {
+        Column(modifier = Modifier.fillMaxSize()) {
+            // Top status bar
             Row(
                 modifier = Modifier
                     .fillMaxWidth()
@@ -155,212 +178,211 @@ fun ChatScreen(
             ) {
                 StatusIndicator(status = status)
             }
-        },
-        bottomBar = {
-            Column(
-                modifier = Modifier
-                    .fillMaxWidth()
-                    .navigationBarsPadding(),
-            ) {
-                // "昔涟正在输入..." indicator
-                if (isStreaming) {
-                    Text(
-                        text = "昔涟正在输入${typingDots.value}",
-                        style = MaterialTheme.typography.labelSmall,
-                        color = MaterialTheme.colorScheme.primary,
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .padding(horizontal = 16.dp, vertical = 2.dp),
-                        textAlign = TextAlign.Start,
-                    )
-                }
 
-                Row(
+            // Messages area (fills space above input area)
-                    modifier = Modifier
+            PullToRefreshBox(
-                        .fillMaxWidth()
+                isRefreshing = isRefreshing,
-                        .padding(horizontal = 12.dp, vertical = 8.dp),
+                onRefresh = { viewModel.refreshMessages() },
-                    verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
-                ) {
+                    .weight(1f)
-                    if (isRecording && isDragging) {
+                    .padding(bottom = 96.dp), // Reserve space for floating input bar
-                        // Recording state with drag — show recording indicator
+            ) {
-                        Box(
+                if (messages.isEmpty() && !isStreaming) {
-                            modifier = Modifier
+                    Box(
-                                .weight(1f)
+                        modifier = Modifier.fillMaxSize(),
-                                .clip(RoundedCornerShape(12.dp))
+                        contentAlignment = Alignment.Center,
-                                .background(
+                    ) {
-                                    if (inCancelZone) MaterialTheme.colorScheme.errorContainer
+                        Text(
-                                    else MaterialTheme.colorScheme.surfaceVariant
+                            text = "开始和昔涟对话吧",
-                                )
+                            style = MaterialTheme.typography.bodyLarge,
-                                .padding(horizontal = 16.dp, vertical = 14.dp),
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
-                            contentAlignment = Alignment.Center,
-                        ) {
-                            Text(
-                                text = when {
-                                    inCancelZone -> "松手取消"
-                                    inLockZone -> "松手录音"
-                                    else -> "%.1f\" 上滑取消 右滑松手".format(recordSec)
-                                },
-                                style = MaterialTheme.typography.bodyMedium,
-                                color = if (inCancelZone) MaterialTheme.colorScheme.error
-                                        else MaterialTheme.colorScheme.onSurfaceVariant,
-                            )
-                        }
-                        // Record button (drag anchor)
-                        Box(
-                            modifier = Modifier
-                                .padding(start = 8.dp)
-                                .size(48.dp)
-                                .clip(CircleShape)
-                                .background(MaterialTheme.colorScheme.primary)
-                                .offset { IntOffset(dragOffsetX.toInt(), dragOffsetY.toInt()) },
-                            contentAlignment = Alignment.Center,
-                        ) {
-                            Icon(
-                                Icons.Filled.Mic,
-                                contentDescription = "录音中",
-                                tint = MaterialTheme.colorScheme.onPrimary,
-                            )
-                        }
-                    } else if (isLocked) {
-                        // Locked (hands-free) mode
-                        Box(
-                            modifier = Modifier
-                                .weight(1f)
-                                .clip(RoundedCornerShape(12.dp))
-                                .background(MaterialTheme.colorScheme.primaryContainer)
-                                .padding(horizontal = 16.dp, vertical = 14.dp),
-                            contentAlignment = Alignment.Center,
-                        ) {
-                            Row(verticalAlignment = Alignment.CenterVertically) {
-                                Icon(
-                                    Icons.Filled.Lock,
-                                    contentDescription = null,
-                                    modifier = Modifier.size(16.dp),
-                                    tint = MaterialTheme.colorScheme.onPrimaryContainer,
-                                )
-                                Spacer(modifier = Modifier.width(8.dp))
-                                Text(
-                                    text = "%.1f\" 松手录音中 — 点击结束".format(recordSec),
-                                    style = MaterialTheme.typography.bodyMedium,
-                                    color = MaterialTheme.colorScheme.onPrimaryContainer,
-                                )
-                            }
-                        }
-                        IconButton(onClick = { viewModel.finishRecord() }) {
-                            Icon(
-                                Icons.AutoMirrored.Filled.Send,
-                                contentDescription = "发送",
-                                tint = MaterialTheme.colorScheme.primary,
-                            )
-                        }
-                    } else {
-                        // Normal input mode
-                        OutlinedTextField(
-                            value = inputText,
-                            onValueChange = { viewModel.onInputChanged(it) },
-                            placeholder = { Text("输入消息...") },
-                            modifier = Modifier.weight(1f),
-                            maxLines = 4,
-                            shape = MaterialTheme.shapes.medium,
                         )
-                        // Voice record button with long-press gesture
+                    }
-                        Box(
+                } else {
-                            modifier = Modifier
+                    LazyColumn(
-                                .padding(start = 4.dp)
+                        modifier = Modifier.fillMaxSize(),
-                                .size(48.dp)
+                        state = listState,
-                                .onGloballyPositioned { recordButtonY = it.positionInRoot().y }
+                        reverseLayout = true,
-                                .pointerInput(Unit) {
+                    ) {
-                                    detectDragGesturesAfterLongPress(
+                        itemsIndexed(messages, key = { _, msg -> msg.id }) { index, message ->
-                                        onDragStart = { offset ->
+                            AnimatedChatBubble(
-                                            isDragging = true
+                                message = message,
-                                            dragOffsetX = 0f
+                                animIndex = index.coerceAtMost(20),
-                                            dragOffsetY = 0f
-                                            viewModel.startRecord()
-                                        },
-                                        onDrag = { change, dragAmount ->
-                                            change.consume()
-                                            dragOffsetX += dragAmount.x
-                                            dragOffsetY += dragAmount.y
-                                        },
-                                        onDragEnd = {
-                                            isDragging = false
-                                            when {
-                                                dragOffsetY < -120f -> viewModel.cancelRecord()
-                                                dragOffsetX > 60f -> viewModel.lockRecord()
-                                                else -> viewModel.finishRecord()
-                                            }
-                                            dragOffsetX = 0f
-                                            dragOffsetY = 0f
-                                        },
-                                        onDragCancel = {
-                                            isDragging = false
-                                            viewModel.cancelRecord()
-                                            dragOffsetX = 0f
-                                            dragOffsetY = 0f
-                                        },
-                                    )
-                                },
-                            contentAlignment = Alignment.Center,
-                        ) {
-                            Icon(
-                                Icons.Filled.KeyboardVoice,
-                                contentDescription = "按住录音",
-                                tint = MaterialTheme.colorScheme.onSurfaceVariant,
                             )
                         }
-                        // Send button (only when text present)
+                        if (isStreaming) {
-                        if (inputText.isNotBlank()) {
+                            item(key = "typing_indicator") {
-                            IconButton(
+                                TypingIndicator()
-                                onClick = { viewModel.sendMessage() },
-                                enabled = !isStreaming,
-                            ) {
-                                if (isStreaming) {
-                                    CircularProgressIndicator(
-                                        modifier = Modifier.size(24.dp),
-                                        strokeWidth = 2.dp,
-                                    )
-                                } else {
-                                    Icon(Icons.AutoMirrored.Filled.Send, contentDescription = "发送")
-                                }
                             }
                         }
                     }
                 }
             }
-        },
+        }
-    ) { padding ->
+
-        PullToRefreshBox(
+        // Input area at bottom, moved up by IME
-            isRefreshing = isRefreshing,
+        Column(
-            onRefresh = { viewModel.refreshMessages() },
             modifier = Modifier
-                .fillMaxSize()
+                .align(Alignment.BottomCenter)
-                .padding(padding),
+                .fillMaxWidth()
+                .background(MaterialTheme.colorScheme.surface)
+                .navigationBarsPadding()
+                .imePadding(),
         ) {
-            if (messages.isEmpty() && !isStreaming) {
+            // "昔涟正在输入..." indicator
-                Box(
+            if (isStreaming) {
-                    modifier = Modifier.fillMaxSize(),
+                Text(
-                    contentAlignment = Alignment.Center,
+                    text = "昔涟正在输入${typingDots.value}",
-                ) {
+                    style = MaterialTheme.typography.labelSmall,
-                    Text(
+                    color = MaterialTheme.colorScheme.primary,
-                        text = "开始和昔涟对话吧",
+                    modifier = Modifier
-                        style = MaterialTheme.typography.bodyLarge,
+                        .fillMaxWidth()
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        .padding(horizontal = 16.dp, vertical = 2.dp),
-                    )
+                    textAlign = TextAlign.Start,
-                }
+                )
-            } else {
+            }
-                LazyColumn(
+
-                    modifier = Modifier.fillMaxSize(),
+            Row(
-                    state = listState,
+                modifier = Modifier
-                ) {
+                    .fillMaxWidth()
-                    items(messages, key = { it.id }) { message ->
+                    .padding(horizontal = 12.dp, vertical = 8.dp),
-                        AnimatedChatBubble(
+                verticalAlignment = Alignment.CenterVertically,
-                            message = message,
+            ) {
-                            animIndex = animIndex[message.id] ?: 0,
+                if (isRecording && isDragging) {
+                    Box(
+                        modifier = Modifier
+                            .weight(1f)
+                            .clip(RoundedCornerShape(12.dp))
+                            .background(
+                                if (inCancelZone) MaterialTheme.colorScheme.errorContainer
+                                else MaterialTheme.colorScheme.surfaceVariant
+                            )
+                            .padding(horizontal = 16.dp, vertical = 14.dp),
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Text(
+                            text = when {
+                                inCancelZone -> "松手取消"
+                                inLockZone -> "松手录音"
+                                else -> "%.1f\" 上滑取消 右滑松手".format(recordSec)
+                            },
+                            style = MaterialTheme.typography.bodyMedium,
+                            color = if (inCancelZone) MaterialTheme.colorScheme.error
+                                    else MaterialTheme.colorScheme.onSurfaceVariant,
                         )
                     }
-                    if (isStreaming) {
+                    Box(
-                        item(key = "typing_indicator") {
+                        modifier = Modifier
-                            TypingIndicator()
+                            .padding(start = 8.dp)
+                            .size(48.dp)
+                            .clip(CircleShape)
+                            .background(MaterialTheme.colorScheme.primary)
+                            .offset { IntOffset(dragOffsetX.toInt(), dragOffsetY.toInt()) },
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Icon(
+                            Icons.Filled.Mic,
+                            contentDescription = "录音中",
+                            tint = MaterialTheme.colorScheme.onPrimary,
+                        )
+                    }
+                } else if (isLocked) {
+                    Box(
+                        modifier = Modifier
+                            .weight(1f)
+                            .clip(RoundedCornerShape(12.dp))
+                            .background(MaterialTheme.colorScheme.primaryContainer)
+                            .padding(horizontal = 16.dp, vertical = 14.dp),
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Row(verticalAlignment = Alignment.CenterVertically) {
+                            Icon(
+                                Icons.Filled.Lock,
+                                contentDescription = null,
+                                modifier = Modifier.size(16.dp),
+                                tint = MaterialTheme.colorScheme.onPrimaryContainer,
+                            )
+                            Spacer(modifier = Modifier.width(8.dp))
+                            Text(
+                                text = "%.1f\" 松手录音中 — 点击结束".format(recordSec),
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onPrimaryContainer,
+                            )
+                        }
+                    }
+                    IconButton(onClick = { viewModel.finishRecord() }) {
+                        Icon(
+                            Icons.AutoMirrored.Filled.Send,
+                            contentDescription = "发送",
+                            tint = MaterialTheme.colorScheme.primary,
+                        )
+                    }
+                } else {
+                    OutlinedTextField(
+                        value = inputText,
+                        onValueChange = { viewModel.onInputChanged(it) },
+                        placeholder = { Text("输入消息...") },
+                        modifier = Modifier.weight(1f),
+                        maxLines = 4,
+                        shape = MaterialTheme.shapes.medium,
+                    )
+                    Box(
+                        modifier = Modifier
+                            .padding(start = 4.dp)
+                            .size(48.dp)
+                            .onGloballyPositioned { recordButtonY = it.positionInRoot().y }
+                            .pointerInput(Unit) {
+                                detectDragGesturesAfterLongPress(
+                                    onDragStart = { offset ->
+                                        isDragging = true
+                                        dragOffsetX = 0f
+                                        dragOffsetY = 0f
+                                        viewModel.startRecord()
+                                    },
+                                    onDrag = { change, dragAmount ->
+                                        change.consume()
+                                        dragOffsetX += dragAmount.x
+                                        dragOffsetY += dragAmount.y
+                                    },
+                                    onDragEnd = {
+                                        isDragging = false
+                                        when {
+                                            dragOffsetY < -120f -> viewModel.cancelRecord()
+                                            dragOffsetX > 60f -> viewModel.lockRecord()
+                                            else -> viewModel.finishRecord()
+                                        }
+                                        dragOffsetX = 0f
+                                        dragOffsetY = 0f
+                                    },
+                                    onDragCancel = {
+                                        isDragging = false
+                                        viewModel.cancelRecord()
+                                        dragOffsetX = 0f
+                                        dragOffsetY = 0f
+                                    },
+                                )
+                            },
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Icon(
+                            Icons.Filled.KeyboardVoice,
+                            contentDescription = "按住录音",
+                            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                    if (inputText.isNotBlank()) {
+                        IconButton(
+                            onClick = { viewModel.sendMessage() },
+                            enabled = !isStreaming,
+                        ) {
+                            if (isStreaming) {
+                                CircularProgressIndicator(
+                                    modifier = Modifier.size(24.dp),
+                                    strokeWidth = 2.dp,
+                                )
+                            } else {
+                                Icon(Icons.AutoMirrored.Filled.Send, contentDescription = "发送")
+                            }
                         }
                     }
                 }

app/src/main/java/top/yeij/cyrene/ui/screens/settings/KeepAlivePage.kt

@@ -0,0 +1,377 @@
+package top.yeij.cyrene.ui.screens.settings
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Build
+import android.provider.Settings
+import android.widget.Toast
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.BatterySaver
+import androidx.compose.material.icons.filled.CheckCircle
+import androidx.compose.material.icons.filled.Notifications
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material.icons.filled.Security
+import androidx.compose.material.icons.filled.Warning
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CenterAlignedTopAppBar
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import top.yeij.cyrene.service.WebSocketKeepAliveService
+import top.yeij.cyrene.util.KeepAliveManager
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun KeepAlivePage(
+    onBack: () -> Unit,
+) {
+    val context = LocalContext.current
+    val keepAliveManager = KeepAliveManager(context)
+
+    val fgRunning = WebSocketKeepAliveService.isRunning
+    val batteryExempt = keepAliveManager.isBatteryOptimizationExempt()
+    val canOverlay = keepAliveManager.canDrawOverlays()
+    val manufacturerName = keepAliveManager.getManufacturerName()
+
+    val batteryLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.StartActivityForResult(),
+    ) {
+        // Re-check battery optimization after returning from settings
+    }
+
+    Scaffold(
+        topBar = {
+            CenterAlignedTopAppBar(
+                title = { Text("后台保活") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "返回")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState()),
+        ) {
+            // Header explanation
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp),
+                colors = CardDefaults.cardColors(
+                    containerColor = MaterialTheme.colorScheme.primaryContainer.copy(alpha = 0.5f),
+                ),
+            ) {
+                Row(
+                    modifier = Modifier.padding(16.dp),
+                    verticalAlignment = Alignment.Top,
+                ) {
+                    Icon(
+                        Icons.Filled.Warning,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer,
+                        modifier = Modifier.size(24.dp),
+                    )
+                    Spacer(modifier = Modifier.width(12.dp))
+                    Text(
+                        text = "Android 系统会在应用进入后台后限制网络连接或终止进程，导致无法接收服务端主动推送的消息。请按照以下方法加强后台保活能力。",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+            Text(
+                text = "保活方式",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+            )
+
+            // 1. Foreground Service
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 6.dp),
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Filled.Notifications,
+                        contentDescription = null,
+                        tint = if (fgRunning) MaterialTheme.colorScheme.primary
+                        else MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.size(28.dp),
+                    )
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = "前台服务通知",
+                            style = MaterialTheme.typography.titleSmall,
+                            fontWeight = FontWeight.Medium,
+                        )
+                        Text(
+                            text = if (fgRunning) "已开启，通知栏显示「昔涟 — 已连接」" else "切后台时显示持久通知保活"
+                        )
+                    }
+                    Switch(
+                        checked = fgRunning,
+                        onCheckedChange = {
+                            if (it) {
+                                WebSocketKeepAliveService.start(context)
+                            } else {
+                                WebSocketKeepAliveService.stop(context)
+                            }
+                        },
+                    )
+                }
+            }
+
+            // 2. Battery Optimization
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 6.dp),
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Filled.CheckCircle,
+                        contentDescription = null,
+                        tint = if (batteryExempt) MaterialTheme.colorScheme.primary
+                        else MaterialTheme.colorScheme.error,
+                        modifier = Modifier.size(28.dp),
+                    )
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = "忽略电池优化",
+                            style = MaterialTheme.typography.titleSmall,
+                            fontWeight = FontWeight.Medium,
+                        )
+                        Text(
+                            text = if (batteryExempt) "已免除，Doze 模式不会限制网络"
+                            else "未免除，后台待久会被系统限制网络（Doze 休眠）"
+                        )
+                    }
+                    if (!batteryExempt) {
+                        TextButton(onClick = {
+                            batteryLauncher.launch(
+                                keepAliveManager.openBatteryOptimizationSettings()
+                            )
+                        }) {
+                            Text("去设置")
+                        }
+                    }
+                }
+            }
+
+            // 3. Auto-start (OEM-specific)
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 6.dp),
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Filled.PlayArrow,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.size(28.dp),
+                    )
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = "自启动管理",
+                            style = MaterialTheme.typography.titleSmall,
+                            fontWeight = FontWeight.Medium,
+                        )
+                        Text(
+                            text = when (manufacturerName) {
+                                "xiaomi" -> "小米手机请在「安全中心 → 自启动管理」中允许昔涟自启动"
+                                "huawei" -> "华为手机请在「手机管家 → 自启动管理」中允许昔涟自启动"
+                                "oppo" -> "OPPO 手机请在「设置 → 应用自启动」中允许昔涟自启动"
+                                "vivo" -> "vivo 手机请在「i管家 → 自启动」中允许昔涟自启动"
+                                "oneplus" -> "一加手机请在「设置 → 自启动」中允许昔涟自启动"
+                                "samsung" -> "三星手机请在「设置 → 电池 → 不受限制的应用」中添加昔涟"
+                                else -> "请在系统设置中为昔涟开启「自启动/后台运行」权限"
+                            }
+                        )
+                    }
+                    TextButton(onClick = {
+                        val intent = keepAliveManager.getAutoStartIntent()
+                        if (intent != null) {
+                            try {
+                                context.startActivity(intent)
+                            } catch (_: Exception) {
+                                // Fallback to app info
+                                try {
+                                    context.startActivity(
+                                        Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+                                            data = android.net.Uri.parse("package:${context.packageName}")
+                                            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                                        }
+                                    )
+                                } catch (_: Exception) { }
+                            }
+                        } else {
+                            Toast.makeText(context, "未找到对应设置页面，请手动前往系统设置", Toast.LENGTH_LONG).show()
+                        }
+                    }) {
+                        Text("去设置")
+                    }
+                }
+            }
+
+            // 4. Lock task (recent apps lock)
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 6.dp),
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Filled.Security,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.size(28.dp),
+                    )
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = "锁定后台任务",
+                            style = MaterialTheme.typography.titleSmall,
+                            fontWeight = FontWeight.Medium,
+                        )
+                        Text(
+                            text = "进入最近任务界面（多任务键），将昔涟卡片下拉锁定，防止系统清理后台时误杀"
+                        )
+                    }
+                }
+            }
+
+            // 5. Battery saver passthrough
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                Card(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                ) {
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(16.dp),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        Icon(
+                            Icons.Filled.BatterySaver,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.size(28.dp),
+                        )
+                        Spacer(modifier = Modifier.width(16.dp))
+                        Column(modifier = Modifier.weight(1f)) {
+                            Text(
+                                text = "电池优化白名单",
+                                style = MaterialTheme.typography.titleSmall,
+                                fontWeight = FontWeight.Medium,
+                            )
+                            Text(
+                                text = "手动确认系统电池优化白名单，确保昔涟不被限制"
+                            )
+                        }
+                        TextButton(onClick = {
+                            val intent = Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS)
+                            try {
+                                context.startActivity(intent)
+                            } catch (_: Exception) { }
+                        }) {
+                            Text("查看")
+                        }
+                    }
+                }
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+            HorizontalDivider(modifier = Modifier.padding(horizontal = 16.dp))
+            Spacer(modifier = Modifier.height(16.dp))
+
+            Text(
+                text = "补充提示",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+            )
+            Text(
+                text = """
+                不同的手机厂商对待后台应用的方式各不相同：
+
+                • 谷歌 Pixel / 原生 Android：开启电池优化豁免即可
+                • 小米 MIUI / HyperOS：需同时开启自启动 + 电池无限制
+                • 华为 HarmonyOS：需开启自启动 + 关闭省电模式限制
+                • OPPO ColorOS / vivo OriginOS：需开启自启动 + 后台运行
+                • 三星 OneUI：需添加到「不受限制的应用」列表
+
+                实际效果因系统版本和厂商策略而异。建议至少开启「前台服务通知」+「忽略电池优化」两项。
+                """.trimIndent(),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(horizontal = 16.dp),
+            )
+
+            Spacer(modifier = Modifier.height(32.dp))
+        }
+    }
+}

app/src/main/java/top/yeij/cyrene/ui/screens/settings/SettingsScreen.kt

@@ -26,6 +26,7 @@ import androidx.compose.material.icons.filled.DeleteForever
 import androidx.compose.material.icons.filled.LightMode
 import androidx.compose.material.icons.filled.Palette
 import androidx.compose.material.icons.filled.SettingsBrightness
+import androidx.compose.material.icons.filled.Security
 import androidx.compose.material.icons.filled.Share
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ButtonDefaults
@@ -68,6 +69,7 @@ import top.yeij.cyrene.viewmodel.SettingsViewModel
 @Composable
 fun SettingsScreen(
     onBack: () -> Unit,
+    onNavigateToKeepAlive: () -> Unit = {},
     viewModel: SettingsViewModel = koinInject(),
 ) {
     val baseUrl by viewModel.baseUrl.collectAsState()
@@ -464,6 +466,24 @@ fun SettingsScreen(
                 )
             }
 
+            Spacer(modifier = Modifier.height(16.dp))
+            HorizontalDivider()
+            Spacer(modifier = Modifier.height(16.dp))
+
+            // Keep-alive
+            Text(
+                text = "后台保活",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.padding(16.dp),
+            )
+            ListItem(
+                headlineContent = { Text("保活设置") },
+                supportingContent = { Text("前台服务、电池优化、自启动等保活方式") },
+                leadingContent = { Icon(Icons.Filled.Security, contentDescription = null) },
+                modifier = Modifier.clickable { onNavigateToKeepAlive() },
+            )
+
             Spacer(modifier = Modifier.height(24.dp))
             HorizontalDivider()
             Spacer(modifier = Modifier.height(16.dp))

app/src/main/java/top/yeij/cyrene/ui/theme/Theme.kt

@@ -81,13 +81,18 @@ fun CyreneTheme(
     val view = LocalView.current
     if (!view.isInEditMode) {
         SideEffect {
-            val window = (view.context as Activity).window
+            val window = (view.context as? Activity)?.window
-            window.statusBarColor = colorScheme.background.toArgb()
+            if (window != null) {
-            window.navigationBarColor = colorScheme.background.toArgb()
+                window.statusBarColor = colorScheme.background.toArgb()
-            window.decorView.setBackgroundColor(colorScheme.background.toArgb())
+                window.navigationBarColor = colorScheme.background.toArgb()
-            WindowCompat.getInsetsController(window, view).apply {
+                window.decorView.setBackgroundColor(colorScheme.background.toArgb())
-                isAppearanceLightStatusBars = !darkTheme
+                WindowCompat.getInsetsController(window, view).apply {
-                isAppearanceLightNavigationBars = !darkTheme
+                    isAppearanceLightStatusBars = !darkTheme
+                    isAppearanceLightNavigationBars = !darkTheme
+                }
+            } else {
+                // Non-Activity context (e.g. VoiceInteractionSession overlay) — transparent
+                view.rootView?.setBackgroundColor(android.graphics.Color.TRANSPARENT)
             }
         }
     }

app/src/main/java/top/yeij/cyrene/util/KeepAliveManager.kt

@@ -0,0 +1,149 @@
+package top.yeij.cyrene.util
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
+import android.os.PowerManager
+import android.provider.Settings
+import top.yeij.cyrene.service.WebSocketKeepAliveService
+
+class KeepAliveManager(private val context: Context) {
+
+    // --- 前台服务 ---
+
+    val isForegroundServiceRunning: Boolean
+        get() = WebSocketKeepAliveService.isRunning
+
+    // --- 电池优化 ---
+
+    fun isBatteryOptimizationExempt(): Boolean {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return true
+        val pm = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+        return pm.isIgnoringBatteryOptimizations(context.packageName)
+    }
+
+    fun openBatteryOptimizationSettings(): Intent {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS).apply {
+                data = Uri.parse("package:${context.packageName}")
+            }
+        } else {
+            Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+                data = Uri.parse("package:${context.packageName}")
+            }
+        }
+    }
+
+    // --- 自启动 / 后台管理 (OEM-specific) ---
+
+    fun getAutoStartIntent(): Intent? {
+        val packageName = context.packageName
+        val manufacturers = listOf(
+            // Xiaomi
+            AutoStartIntent("xiaomi", Intent().apply {
+                component = ComponentName(
+                    "com.miui.securitycenter",
+                    "com.miui.permcenter.autostart.AutoStartManagementActivity"
+                )
+            }),
+            AutoStartIntent("xiaomi", Intent().apply {
+                component = ComponentName(
+                    "com.miui.securitycenter",
+                    "com.miui.appmanager.ApplicationsManagerActivity"
+                )
+            }),
+            // Huawei
+            AutoStartIntent("huawei", Intent().apply {
+                component = ComponentName(
+                    "com.huawei.systemmanager",
+                    "com.huawei.systemmanager.startupmgr.ui.StartupNormalAppListActivity"
+                )
+            }),
+            AutoStartIntent("huawei", Intent().apply {
+                component = ComponentName(
+                    "com.huawei.systemmanager",
+                    "com.huawei.systemmanager.optimize.process.ProtectActivity"
+                )
+            }),
+            // Oppo
+            AutoStartIntent("oppo", Intent().apply {
+                component = ComponentName(
+                    "com.coloros.safecenter",
+                    "com.coloros.safecenter.permission.startup.StartupAppListActivity"
+                )
+            }),
+            AutoStartIntent("oppo", Intent().apply {
+                component = ComponentName(
+                    "com.coloros.safecenter",
+                    "com.coloros.safecenter.permission.startup.FakeActivity"
+                )
+            }),
+            // Vivo
+            AutoStartIntent("vivo", Intent().apply {
+                component = ComponentName(
+                    "com.vivo.permissionmanager",
+                    "com.vivo.permissionmanager.activity.BgStartUpManagerActivity"
+                )
+            }),
+            AutoStartIntent("vivo", Intent().apply {
+                component = ComponentName(
+                    "com.iqoo.secure",
+                    "com.iqoo.secure.ui.phoneoptimize.AddWhiteListActivity"
+                )
+            }),
+            // Samsung
+            AutoStartIntent("samsung", Intent().apply {
+                component = ComponentName(
+                    "com.samsung.android.lool",
+                    "com.samsung.android.sm.ui.battery.BatteryActivity"
+                )
+            }),
+            // OnePlus
+            AutoStartIntent("oneplus", Intent().apply {
+                component = ComponentName(
+                    "com.oneplus.security",
+                    "com.oneplus.security.chainlaunch.view.ChainLaunchAppListActivity"
+                )
+            }),
+            // Generic fallback: app info
+            AutoStartIntent("generic", Intent(
+                Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                Uri.parse("package:$packageName")
+            )),
+        )
+
+        for (entry in manufacturers) {
+            val intent = entry.intent
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            if (intent.resolveActivity(context.packageManager) != null) {
+                return intent
+            }
+        }
+        return null
+    }
+
+    fun getManufacturerName(): String {
+        return Build.MANUFACTURER.lowercase()
+    }
+
+    private data class AutoStartIntent(val manufacturer: String, val intent: Intent)
+
+    // --- 悬浮窗权限 (optional, for overlay mode) ---
+
+    fun canDrawOverlays(): Boolean {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            Settings.canDrawOverlays(context)
+        } else {
+            true
+        }
+    }
+
+    fun openOverlaySettings(): Intent {
+        return Intent(
+            Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
+            Uri.parse("package:${context.packageName}")
+        ).apply { addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) }
+    }
+}

app/src/main/java/top/yeij/cyrene/viewmodel/ChatViewModel.kt

@@ -20,17 +20,8 @@ import top.yeij.cyrene.util.VoiceRecorder
 
 private fun List<Message>.deduplicate(): List<Message> {
     if (isEmpty()) return this
-    val result = mutableListOf(this[0])
+    val seen = mutableSetOf<String>()
-    for (i in 1 until size) {
+    return filter { seen.add(it.id) }
-        val prev = result.last()
-        val curr = this[i]
-        val isDuplicate = curr.id == prev.id ||
-            (curr.role == prev.role && curr.content == prev.content && curr.msgType == prev.msgType)
-        if (!isDuplicate) {
-            result.add(curr)
-        }
-    }
-    return result
 }
 
 private fun List<Message>.removeWrappingDuplicates(): List<Message> {
@@ -93,29 +84,19 @@ class ChatViewModel(
     private var dbObserverJob: Job? = null
 
     init {
-        // Phase 1: find/create main session, reconnect WS, load server history
+        // Phase 1: find/create main session, reconnect WS, load server history into DB, then observe DB
         viewModelScope.launch {
             try {
                 val sessionId = chatRepository.initializeSession()
                 currentSessionId = sessionId
                 chatRepository.currentSessionId = sessionId
                 chatRepository.ensureConnected()
-                loadMessagesFromDb(sessionId)
+                chatRepository.loadMessagesFromServer(sessionId)
-                val serverMessages = chatRepository.loadMessagesFromServer(sessionId)
-                if (serverMessages.isNotEmpty()) {
-                    val serverIds = serverMessages.map { it.id }.toSet()
-                    _currentMessages.update { current ->
-                        val localOnly = current.filter { it.id !in serverIds }
-                        (serverMessages + localOnly)
-                            .sortedBy { it.timestamp }
-                            .deduplicate()
-                            .removeWrappingDuplicates()
-                    }
-                }
             } catch (_: Exception) { }
+            loadMessagesFromDb(currentSessionId ?: return@launch)
         }
 
-        // Observe incoming live messages with atomic dedup
+        // Observe incoming live messages — insert at correct descending position
         viewModelScope.launch {
             chatRepository.observeMessages().collect { message ->
                 try {
@@ -125,15 +106,12 @@ class ChatViewModel(
                         if (existingIdx >= 0) {
                             updated[existingIdx] = message
                         } else {
-                            val isDup = updated.any {
+                            // Insert at correct position for descending timestamp (newest first)
-                                it.role == message.role && it.content == message.content && it.msgType == message.msgType
+                            val insertAt = updated.indexOfFirst { it.timestamp <= message.timestamp }
-                            }
+                            if (insertAt >= 0) updated.add(insertAt, message) else updated.add(message)
-                            if (!isDup) {
+                            val idx = _messageAnimIndex.value.toMutableMap()
-                                updated.add(message)
+                            idx[message.id] = animCounter++
-                                val idx = _messageAnimIndex.value.toMutableMap()
+                            _messageAnimIndex.value = idx
-                                idx[message.id] = animCounter++
-                                _messageAnimIndex.value = idx
-                            }
                         }
                         updated.deduplicate()
                     }
@@ -151,6 +129,15 @@ class ChatViewModel(
                 animCounter = 0
             }
         }
+        // Observe message removals (e.g. wrapping stream_end deduped by review items)
+        viewModelScope.launch {
+            chatRepository.messageRemovals.collect { msgId ->
+                _currentMessages.update { list -> list.filter { it.id != msgId } }
+                val idx = _messageAnimIndex.value.toMutableMap()
+                idx.remove(msgId)
+                _messageAnimIndex.value = idx
+            }
+        }
         // Reset user-side sending state when server starts responding
         viewModelScope.launch {
             chatRepository.isAssistantStreaming.collect { streaming ->
@@ -194,7 +181,7 @@ class ChatViewModel(
                         val live = current.associateBy { it.id }
                         val db = messages.associateBy { it.id }
                         (db + live).values
-                            .sortedBy { it.timestamp }
+                            .sortedByDescending { it.timestamp }
                             .deduplicate()
                             .removeWrappingDuplicates()
                     }
@@ -236,8 +223,8 @@ class ChatViewModel(
         viewModelScope.launch {
             chatRepository.connectWebSocket(sessionId)
             chatRepository.loadMessagesFromServer(sessionId)
+            loadMessagesFromDb(sessionId)
         }
-        loadMessagesFromDb(sessionId)
     }
 
     fun refreshMessages() {
@@ -248,17 +235,7 @@ class ChatViewModel(
                 if (!isConnected.value) {
                     chatRepository.ensureConnected()
                 }
-                val serverMessages = chatRepository.loadMessagesFromServer(sid)
+                chatRepository.loadMessagesFromServer(sid)
-                if (serverMessages.isNotEmpty()) {
-                    val serverIds = serverMessages.map { it.id }.toSet()
-                    _currentMessages.update { current ->
-                        val localOnly = current.filter { it.id !in serverIds }
-                        (serverMessages + localOnly)
-                            .sortedBy { it.timestamp }
-                            .deduplicate()
-                            .removeWrappingDuplicates()
-                    }
-                }
             } catch (_: Exception) { }
             _isRefreshing.value = false
         }

app/src/main/java/top/yeij/cyrene/viewmodel/OverlayViewModel.kt

@@ -19,17 +19,8 @@ import top.yeij.cyrene.voice.tts.TextToSpeechEngine
 
 private fun List<Message>.deduplicate(): List<Message> {
     if (isEmpty()) return this
-    val result = mutableListOf(this[0])
+    val seen = mutableSetOf<String>()
-    for (i in 1 until size) {
+    return filter { seen.add(it.id) }
-        val prev = result.last()
-        val curr = this[i]
-        val isDuplicate = curr.id == prev.id ||
-            (curr.role == prev.role && curr.content == prev.content && curr.msgType == prev.msgType)
-        if (!isDuplicate) {
-            result.add(curr)
-        }
-    }
-    return result
 }
 
 private fun List<Message>.removeWrappingDuplicates(): List<Message> {
@@ -114,6 +105,16 @@ class OverlayViewModel(
                 }
             }
         }
+        viewModelScope.launch {
+            chatRepository.isAssistantStreaming.collect { streaming ->
+                if (!streaming && _state.value == OverlayState.PROCESSING) {
+                    delay(500)
+                    if (_state.value == OverlayState.PROCESSING) {
+                        setWaiting()
+                    }
+                }
+            }
+        }
         viewModelScope.launch {
             ttsEngine.onDone.collect {
                 if (_state.value == OverlayState.SPEAKING) {
@@ -128,6 +129,14 @@ class OverlayViewModel(
                 animCounter = 0
             }
         }
+        viewModelScope.launch {
+            chatRepository.messageRemovals.collect { msgId ->
+                _messages.update { list -> list.filter { it.id != msgId } }
+                val idx = _messageAnimIndex.value.toMutableMap()
+                idx.remove(msgId)
+                _messageAnimIndex.value = idx
+            }
+        }
     }
 
     fun onInputChanged(text: String) {