增加了发布通道

android/app/src/main/java/com/tsmobile/app/App.kt

@@ -16,6 +16,7 @@ class App : Application() {
     companion object {
         private const val TAG = "App"
         private const val CONNECTION_CHANNEL_ID = "connection_channel"
+        const val POKE_CHANNEL_ID = "poke_channel"
     }
 
     override fun onCreate() {
@@ -24,6 +25,9 @@ class App : Application() {
         // 创建通知频道（前台服务需要）
         createConnectionNotificationChannel()
 
+        // 创建 Poke 通知频道（高优先级，弹横幅）
+        createPokeNotificationChannel()
+
         // 全局未捕获异常处理
         val defaultHandler = Thread.getDefaultUncaughtExceptionHandler()
         Thread.setDefaultUncaughtExceptionHandler { thread, throwable ->
@@ -54,6 +58,23 @@ class App : Application() {
         nm.createNotificationChannel(channel)
     }
 
+    /**
+     * 创建 Poke 通知频道。
+     * IMPORTANCE_HIGH：弹出横幅、发出声音、锁屏可见。
+     */
+    private fun createPokeNotificationChannel() {
+        val channel = NotificationChannel(
+            POKE_CHANNEL_ID,
+            "戳一戳 通知",
+            NotificationManager.IMPORTANCE_HIGH,
+        ).apply {
+            description = "收到其他用户的 戳一戳 通知"
+            setShowBadge(true)
+        }
+        val nm = getSystemService(NotificationManager::class.java)
+        nm.createNotificationChannel(channel)
+    }
+
     private fun writeCrashLog(throwable: Throwable) {
         try {
             val file = File(getExternalFilesDir(null), "crash.log")

android/app/src/main/java/com/tsmobile/app/ConnectionService.kt

@@ -70,8 +70,10 @@ class ConnectionService : LifecycleService() {
         ServiceCompat.startForeground(this, NOTIFICATION_ID, notification, serviceType)
 
         android.util.Log.i(TAG, "Foreground service started")
-        // START_STICKY: 被系统杀死后会尝试重建
-        return Service.START_STICKY
+        // The service exists only to keep the process alive while a TS connection is active.
+        // If Android kills it, there is no reliable way to restore the TS session, so don't
+        // ask the system to recreate it with a misleading "connected" notification.
+        return Service.START_NOT_STICKY
     }
 
     override fun onDestroy() {

android/app/src/main/java/com/tsmobile/app/TSBridge.kt

@@ -18,7 +18,32 @@ import java.lang.reflect.Proxy
  */
 object TSBridge {
 
+    private val connectLock = Any()
     private var client: TSClient? = null
+    private var connectionGeneration: Long = 0
+    private var currentIdentity: String = ""
+
+    private fun beginConnection(identity: String): Pair<TSClient, Long> = synchronized(connectLock) {
+        client?.disconnect()
+        client = null
+        connectionGeneration += 1
+        currentIdentity = identity
+        val tsClient = Teamspeak.newClient()
+        client = tsClient
+        tsClient to connectionGeneration
+    }
+
+    private fun endConnection(tsClient: TSClient) = synchronized(connectLock) {
+        if (client === tsClient) {
+            client = null
+        }
+    }
+
+    private fun captureGeneration(): Long = synchronized(connectLock) { connectionGeneration }
+
+    fun currentGeneration(): Long = synchronized(connectLock) { connectionGeneration }
+
+    fun currentIdentity(): String = synchronized(connectLock) { currentIdentity }
 
     /** Poke 事件（Kotlin 侧数据类，对应 Go PokeEvent） */
     data class PokeEventData(
@@ -56,24 +81,61 @@ object TSBridge {
         defaultChannelPassword: String = "",
         callbacks: Callbacks,
     ): String {
-        val tsClient = Teamspeak.newClient()
-        client = tsClient
+        val identity = currentIdentity
+        val (tsClient, generation) = beginConnection(identity)
+        val error = doConnect(tsClient, generation, callbacks) { proxy ->
+            tsClient.connect(host, nickname, password, defaultChannel, defaultChannelPassword, proxy)
+        }
+        if (error.isNotEmpty()) endConnection(tsClient)
+        return error
+    }
 
-        // The checked-in AAR may lag the approved Go contract during migration. A dynamic
-        // proxy lets this source compile against both artifacts while routing only the new
-        // mixed-PCM callbacks when the regenerated AAR is installed.
+    fun connectWithIdentity(
+        identity: String,
+        host: String,
+        nickname: String,
+        password: String = "",
+        defaultChannel: String = "",
+        defaultChannelPassword: String = "",
+        callbacks: Callbacks,
+    ): String {
+        val (tsClient, generation) = beginConnection(identity)
+        val error = doConnect(tsClient, generation, callbacks) { proxy ->
+            tsClient.connectWithIdentity(
+                identity,
+                host,
+                nickname,
+                password,
+                defaultChannel,
+                defaultChannelPassword,
+                proxy,
+            )
+        }
+        if (error.isNotEmpty()) endConnection(tsClient)
+        return error
+    }
+
+    private fun doConnect(
+        tsClient: TSClient,
+        generation: Long,
+        callbacks: Callbacks,
+        connect: (EventCallback) -> String,
+    ): String {
         val callbackProxy = Proxy.newProxyInstance(
             EventCallback::class.java.classLoader,
             arrayOf(EventCallback::class.java),
         ) { _, method, args ->
+            if (captureGeneration() != generation) {
+                return@newProxyInstance null
+            }
             val values = args ?: emptyArray()
             when (method.name) {
                 "onConnected" -> callbacks.onConnected()
                 "onDisconnected" -> callbacks.onDisconnected(values[0] as String)
                 "onTextMessage" -> (values[0] as? TextMsg)?.let(callbacks::onTextMessage)
                 "onClientEnter" -> (values[0] as? Client)?.let(callbacks::onClientEnter)
-                "onClientLeave" -> callbacks.onClientLeave(values[0] as Long, values[1] as String)
-                "onClientMoved" -> callbacks.onClientMoved(values[0] as Long, values[1] as String)
+                "onClientLeave" -> callbacks.onClientLeave((values[0] as Number).toLong(), values[1] as String)
+                "onClientMoved" -> callbacks.onClientMoved((values[0] as Number).toLong(), values[1] as String)
                 "onKicked" -> callbacks.onKicked(values[0] as String)
                 "onMixedVoicePCM" -> (values[0] as? ByteArray)?.let {
                     android.util.Log.d("TSVoice", "Kotlin mixed PCM bytes=${it.size}")
@@ -81,7 +143,7 @@ object TSBridge {
                 }
                 "onClientSpeaking" -> {
                     android.util.Log.i("TSVoice", "Kotlin speaking client=${values[0]} speaking=${values[1]}")
-                    callbacks.onClientSpeaking(values[0] as Long, values[1] as Boolean)
+                    callbacks.onClientSpeaking((values[0] as Number).toLong(), values[1] as Boolean)
                 }
                 "onPoked" -> (values[0] as? teamspeak.PokeEvent)?.let { event ->
                     callbacks.onPoked(PokeEventData(
@@ -91,7 +153,6 @@ object TSBridge {
                         message = event.message,
                     ))
                 }
-                // Raw Opus callbacks deliberately have no Kotlin receive fallback.
                 "onVoiceData" -> Unit
                 "toString" -> "TSBridge.EventCallback"
                 "hashCode" -> System.identityHashCode(callbacks)
@@ -101,13 +162,21 @@ object TSBridge {
             null
         } as EventCallback
 
-        return tsClient.connect(host, nickname, password, defaultChannel, defaultChannelPassword, callbackProxy)
+        return try {
+            connect(callbackProxy)
+        } catch (t: Throwable) {
+            android.util.Log.w("TSBridge", "connect threw", t)
+            "连接失败"
+        }
     }
 
     /** 断开连接 */
     fun disconnect() {
-        client?.disconnect()
-        client = null
+        synchronized(connectLock) {
+            client?.disconnect()
+            client = null
+            connectionGeneration += 1
+        }
     }
 
     /** 是否已连接 */

android/app/src/main/java/com/tsmobile/app/data/Models.kt

@@ -1,6 +1,10 @@
 package com.tsmobile.app.data
 
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+
+/** 共享 Json 实例，避免 parseFileMessageMeta 每次调用都创建新实例 */
+private val fileJson = Json { ignoreUnknownKeys = true }
 
 /**
  * 服务器连接配置。
@@ -99,6 +103,11 @@ data class FileMessageMeta(
         }
 }
 
+/**
+ * 消息类型。
+ */
+enum class MessageType { NORMAL, SYSTEM }
+
 /**
  * 聊天消息实体。
  * 权威来源：OnTextMessage（对应 notifytextmessage）。
@@ -114,6 +123,7 @@ data class ChatMessage(
     val isSelf: Boolean,       // 是否是自己发送的
     val deliveryState: MessageDeliveryState = MessageDeliveryState.SENT, // 送达状态
     val fileMeta: FileMessageMeta? = null, // 文件消息元数据（仅文件消息）
+    val messageType: MessageType = MessageType.NORMAL, // 消息类型
 )
 
 /**
@@ -261,8 +271,7 @@ enum class VoiceOutputDevice {
 fun parseFileMessageMeta(content: String): FileMessageMeta? {
     if (!content.trimStart().startsWith("{")) return null
     return try {
-        val json = kotlinx.serialization.json.Json { ignoreUnknownKeys = true }
-        val obj = json.decodeFromString<kotlinx.serialization.json.JsonObject>(content)
+        val obj = fileJson.decodeFromString<kotlinx.serialization.json.JsonObject>(content)
         val msgType = obj["msg_type"]?.toString()?.trim('"') ?: return null
         if (!msgType.startsWith("ts.file")) return null
         val meta = FileMessageMeta(

android/app/src/main/java/com/tsmobile/app/data/Repository.kt

@@ -28,6 +28,9 @@ object Repository {
     // 客户端 Map 索引：ClientID → ClientInfo（O(1) 查找）
     private var clientMap: Map<Int, ClientInfo> = emptyMap()
 
+    // 客户端 UID 索引：UID → ClientInfo（O(1) UID 反查）
+    private var clientUidMap: Map<String, ClientInfo> = emptyMap()
+
     // --- 当前客户端 ID ---
     private val _selfClientId = MutableStateFlow(0)
     val selfClientId: StateFlow<Int> = _selfClientId.asStateFlow()
@@ -138,6 +141,7 @@ object Repository {
         }
         _clients.value = clients
         clientMap = clients.associateBy { it.id }
+        clientUidMap = clients.associateBy { it.uid }
         _channelClients.value = clients.groupBy { it.channelId }
         android.util.Log.d("Repository", "refreshClientList: ${clients.size} clients updated")
     }
@@ -149,6 +153,14 @@ object Repository {
         _currentChannelId.value = channelId
     }
 
+    /**
+     * 仅更新频道列表（不覆盖 clients 相关状态）。
+     * 用于 refreshChannelsIfNeeded 等部分刷新场景。
+     */
+    fun updateChannels(channels: List<ChannelInfo>) {
+        _channels.value = channels
+    }
+
     /**
      * 更新基线数据。
      */
@@ -161,6 +173,7 @@ object Repository {
         _channels.value = channels
         _clients.value = clients
         clientMap = clients.associateBy { it.id }
+        clientUidMap = clients.associateBy { it.uid }
         _selfClientId.value = selfClientId
         _currentChannelId.value = currentChannelId
 
@@ -171,6 +184,12 @@ object Repository {
     /** 查询成员是否存在 */
     fun hasClient(clientId: Int): Boolean = clientMap.containsKey(clientId)
 
+    /** 查询成员信息 */
+    fun getClient(clientId: Int): ClientInfo? = clientMap[clientId]
+
+    /** 通过 UID 查询成员信息（O(1)） */
+    fun getClientByUid(uid: String): ClientInfo? = clientUidMap[uid]
+
     /** 查询频道是否存在 */
     fun hasChannel(channelId: String): Boolean = _channels.value.any { it.id == channelId }
 
@@ -178,13 +197,10 @@ object Repository {
     // 按 (TargetMode, Target) 分组存储，key = "${targetMode}_${targetId}"
     private val messageArchives = ConcurrentHashMap<String, MutableList<ChatMessage>>()
 
-    // 未读状态：key = "${targetMode}_${targetId}", value = 未读数
-    private val _unreadCounts = MutableStateFlow<Map<String, Int>>(emptyMap())
-    val unreadCounts: StateFlow<Map<String, Int>> = _unreadCounts.asStateFlow()
-
-    // 当前查看的会话（用于判断是否需要未读提示）
+    // 当前查看的会话（用于判断是否需要推送系统通知）
     @Volatile
-    private var activeChatKey: String? = null
+    var activeChatKey: String? = null
+        private set
 
     /**
      * 归档消息（由 OnTextMessage 调用）。
@@ -200,40 +216,32 @@ object Repository {
                 archive.removeAt(0)
             }
         }
-
-        // 如果不是当前查看的会话，增加未读计数
-        if (key != activeChatKey) {
-            val currentCounts = _unreadCounts.value.toMutableMap()
-            currentCounts[key] = (currentCounts[key] ?: 0) + 1
-            _unreadCounts.value = currentCounts
-        }
     }
 
     /**
      * 标记自己发送的消息为已送达（匹配 OnTextMessage 回显）。
-     * @return true 表示找到并更新了对应的 PENDING 消息
+     * 优先用 invokerID + content 双重匹配（AAR 已支持 InvokerID），
+     * 降级到仅 content 匹配（senderId=0 时）。
+     * @return 已确认消息的 ID，未匹配返回 null
      */
-    fun confirmMessageDelivery(targetMode: Int, targetId: Long, senderId: Int, content: String): Boolean {
+    fun confirmMessageDelivery(targetMode: Int, targetId: Long, senderId: Int, content: String): String? {
         val key = "${targetMode}_${targetId}"
-        val archive = messageArchives[key] ?: return false
+        val archive = messageArchives[key] ?: return null
 
         synchronized(archive) {
-            // 从后往前找最近的 PENDING 消息（同内容）
-            // 不匹配 senderId：gomobile 的 TextMsg 不含 InvokerID，
-            // 通过 UID 反查 clientId 可能因客户端列表未同步而得到 0，
-            // 导致与 sendMessage 时记录的 selfClientId 不一致。
             for (i in archive.indices.reversed()) {
                 val msg = archive[i]
                 if (msg.isSelf &&
                     msg.deliveryState == MessageDeliveryState.PENDING &&
-                    msg.content == content
+                    msg.content == content &&
+                    (senderId == 0 || msg.senderId == senderId)
                 ) {
                     archive[i] = msg.copy(deliveryState = MessageDeliveryState.SENT)
-                    return true
+                    return msg.id
                 }
             }
         }
-        return false
+        return null
     }
 
     /**
@@ -297,16 +305,6 @@ object Repository {
         }
     }
 
-    /**
-     * 清除指定会话的未读标记。
-     */
-    fun clearUnread(targetMode: Int, targetId: Long) {
-        val key = "${targetMode}_${targetId}"
-        val currentCounts = _unreadCounts.value.toMutableMap()
-        currentCounts.remove(key)
-        _unreadCounts.value = currentCounts
-    }
-
     /**
      * 清理会话数据。
      */
@@ -314,12 +312,12 @@ object Repository {
         _channels.value = emptyList()
         _clients.value = emptyList()
         clientMap = emptyMap()
+        clientUidMap = emptyMap()
         _selfClientId.value = 0
         _currentChannelId.value = "0"
         _serverInfo.value = null
         _channelClients.value = emptyMap()
         messageArchives.clear()
-        _unreadCounts.value = emptyMap()
         activeChatKey = null
     }
 

android/app/src/main/java/com/tsmobile/app/data/UpdateChecker.kt

@@ -0,0 +1,171 @@
+package com.tsmobile.app.data
+
+import android.util.Log
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.util.concurrent.TimeUnit
+
+/**
+ * Gitea 发布信息。
+ */
+data class ReleaseInfo(
+    val versionName: String,
+    val releaseUrl: String,
+    val tagName: String,
+    val body: String = "",
+)
+
+/**
+ * GitHub/Gitea API 发布响应（部分字段）。
+ */
+@Serializable
+private data class ReleaseResponse(
+    val tag_name: String = "",
+    val name: String = "",
+    val html_url: String = "",
+    val body: String = "",
+)
+
+/**
+ * 更新检测器。
+ *
+ * 通过 Gitea REST API 获取最新发布的版本信息，
+ * 用 semver 方式（x.y.z）与本地 versionName 比较判断是否有新版本。
+ */
+object UpdateChecker {
+
+    private const val TAG = "UpdateChecker"
+
+    /** Gitea 实例地址 */
+    private const val GITEA_HOST = "rep.sansenhoshi.top"
+
+    /** 仓库路径 */
+    private const val REPO_PATH = "sansenhoshi/ts-mobile-go"
+
+    /** Gitea API: 获取最新发布 */
+    private val API_URL =
+        "https://$GITEA_HOST/api/v1/repos/$REPO_PATH/releases/latest"
+
+    private val json = Json { ignoreUnknownKeys = true }
+
+    private val client: OkHttpClient by lazy {
+        OkHttpClient.Builder()
+            .connectTimeout(10, TimeUnit.SECONDS)
+            .readTimeout(10, TimeUnit.SECONDS)
+            .addInterceptor(UserAgentInterceptor())
+            .build()
+    }
+
+    /**
+     * 注入 User-Agent 头（Gitea API 建议携带）。
+     */
+    private class UserAgentInterceptor : Interceptor {
+        override fun intercept(chain: Interceptor.Chain): okhttp3.Response {
+            val request: Request = chain.request().newBuilder()
+                .header("User-Agent", "TSMobile-UpdateChecker")
+                .build()
+            return chain.proceed(request)
+        }
+    }
+
+    /**
+     * 获取最新发布信息。
+     *
+     * @return [ReleaseInfo] 若成功获取并解析；null 表示请求失败或格式异常。
+     */
+    suspend fun fetchLatestRelease(): ReleaseInfo? = withContext(Dispatchers.IO) {
+        try {
+            val request = Request.Builder()
+                .url(API_URL)
+                .get()
+                .build()
+
+            val response = client.newCall(request).execute()
+
+            if (!response.isSuccessful) {
+                Log.w(TAG, "API returned ${response.code}: ${response.message}")
+                response.close()
+                return@withContext null
+            }
+
+            val body = response.body?.string() ?: run {
+                response.close()
+                return@withContext null
+            }
+            response.close()
+
+            val release = json.decodeFromString<ReleaseResponse>(body)
+
+            // 从 tag_name 解析版本号，失败则从 name 解析
+            val versionName = parseVersionName(release.tag_name)
+                ?: parseVersionName(release.name)
+            if (versionName == null) {
+                Log.w(TAG, "Cannot parse version from tag_name='${release.tag_name}' or name='${release.name}'")
+                return@withContext null
+            }
+
+            Log.d(TAG, "Parsed release: version=$versionName, tag=${release.tag_name}, name=${release.name}")
+
+            ReleaseInfo(
+                versionName = versionName,
+                releaseUrl = release.html_url.ifBlank {
+                    "https://$GITEA_HOST/$REPO_PATH/releases"
+                },
+                tagName = release.tag_name,
+                body = release.body,
+            )
+        } catch (e: Exception) {
+            Log.w(TAG, "Failed to fetch latest release", e)
+            null
+        }
+    }
+
+    /**
+     * 比较两个 semver 版本号。
+     *
+     * @return 正数表示 a > b，负数表示 a < b，0 表示相等。
+     *
+     * 示例：
+     * - compareVersion("1.0.2", "1.0.0") → 1
+     * - compareVersion("2.0.0", "1.9.9") → 1
+     * - compareVersion("1.0.0", "1.0.0") → 0
+     * - compareVersion("1.0", "1.0.0")  → -1
+     */
+    fun compareVersion(a: String, b: String): Int {
+        val partsA = a.split(".").map { it.toIntOrNull() ?: 0 }
+        val partsB = b.split(".").map { it.toIntOrNull() ?: 0 }
+        val maxLen = maxOf(partsA.size, partsB.size)
+
+        for (i in 0 until maxLen) {
+            val numA = partsA.getOrElse(i) { 0 }
+            val numB = partsB.getOrElse(i) { 0 }
+            if (numA != numB) return numA - numB
+        }
+        return 0
+    }
+
+    /**
+     * 从 tag_name 解析版本号（semver）。
+     *
+     * 支持格式：
+     * - "v1.0.2" / "V1.0.2" → "1.0.2"
+     * - "v2.0" → "2.0"
+     * - "1.0.2" → "1.0.2"
+     * - 无法解析则返回 null
+     */
+    private fun parseVersionName(tag: String): String? {
+        if (tag.isBlank()) return null
+
+        // 去掉前缀 v/V
+        val version = tag.trimStart('v', 'V')
+
+        // 提取数字和点号组成的版本段（如 "1.0.2"）
+        val match = Regex("""^\d+(\.\d+)*""").find(version) ?: return null
+        return match.value
+    }
+}

android/app/src/main/java/com/tsmobile/app/data/UpdatePreferences.kt

@@ -0,0 +1,57 @@
+package com.tsmobile.app.data
+
+import android.content.Context
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.longPreferencesKey
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+private val Context.updateDataStore by preferencesDataStore(name = "update_settings")
+
+/**
+ * 更新检测偏好持久化。
+ *
+ * 记录已忽略的版本号和上次检查时间戳，
+ * 避免重复提示同一版本和频繁请求API。
+ */
+class UpdatePreferences(private val context: Context) {
+
+    companion object {
+        private val DISMISSED_VERSION_KEY = stringPreferencesKey("dismissed_version")
+        private val LAST_CHECK_TIMESTAMP_KEY = longPreferencesKey("last_check_timestamp")
+    }
+
+    /**
+     * 已忽略的版本号（默认空字符串表示未忽略任何版本）。
+     */
+    val dismissedVersion: Flow<String> = context.updateDataStore.data.map { prefs ->
+        prefs[DISMISSED_VERSION_KEY] ?: ""
+    }
+
+    /**
+     * 上次检查时间戳（默认0表示从未检查过）。
+     */
+    val lastCheckTimestamp: Flow<Long> = context.updateDataStore.data.map { prefs ->
+        prefs[LAST_CHECK_TIMESTAMP_KEY] ?: 0L
+    }
+
+    /**
+     * 保存已忽略的版本号。
+     */
+    suspend fun setDismissedVersion(version: String) {
+        context.updateDataStore.edit { prefs ->
+            prefs[DISMISSED_VERSION_KEY] = version
+        }
+    }
+
+    /**
+     * 保存上次检查时间戳。
+     */
+    suspend fun setLastCheckTimestamp(ts: Long) {
+        context.updateDataStore.edit { prefs ->
+            prefs[LAST_CHECK_TIMESTAMP_KEY] = ts
+        }
+    }
+}

android/app/src/main/java/com/tsmobile/app/ui/components/MessageItem.kt

@@ -29,6 +29,7 @@ import com.tsmobile.app.data.ChatMessage
 import com.tsmobile.app.data.FileDownloadManager
 import com.tsmobile.app.data.FileMessageMeta
 import com.tsmobile.app.data.MessageDeliveryState
+import com.tsmobile.app.data.MessageType
 import com.tsmobile.app.data.Repository
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -44,6 +45,33 @@ import java.util.Locale
  */
 @Composable
 fun MessageItem(message: ChatMessage) {
+    // 系统消息：居中显示，无气泡
+    if (message.messageType == MessageType.SYSTEM) {
+        val timeText = remember(message.timestamp) {
+            SimpleDateFormat("HH:mm", Locale.getDefault()).format(Date(message.timestamp))
+        }
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(vertical = 6.dp, horizontal = 16.dp),
+            horizontalArrangement = Arrangement.Center,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                text = message.content,
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            Spacer(Modifier.width(6.dp))
+            Text(
+                text = timeText,
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.6f),
+            )
+        }
+        return
+    }
+
     val timeText = remember(message.timestamp) {
         SimpleDateFormat("HH:mm", Locale.getDefault())
             .format(Date(message.timestamp))

android/app/src/main/java/com/tsmobile/app/ui/components/PokeNotification.kt

@@ -36,6 +36,7 @@ fun PokeNotification(
             Card(
                 modifier = Modifier
                     .fillMaxWidth()
+                    .statusBarsPadding()
                     .padding(
                         horizontal = UiTokens.Spacing.Large,
                         vertical = UiTokens.Spacing.Small,

android/app/src/main/java/com/tsmobile/app/ui/components/UpdateBanner.kt

@@ -0,0 +1,80 @@
+package com.tsmobile.app.ui.components
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.NewReleases
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import com.tsmobile.app.ui.theme.UiTokens
+import com.tsmobile.app.ui.theme.semanticColors
+
+/**
+ * 更新横幅 — 显示在服务器配置页顶部。
+ *
+ * 当检测到新版本时显示，提供"下载更新"和"忽略此版本"两个操作。
+ */
+@Composable
+fun UpdateBanner(
+    versionName: String,
+    releaseUrl: String,
+    onDownload: (String) -> Unit,
+    onDismiss: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val semanticColors = MaterialTheme.semanticColors
+    Surface(
+        modifier = modifier.fillMaxWidth(),
+        color = semanticColors.infoContainer,
+        contentColor = semanticColors.onInfoContainer,
+        tonalElevation = UiTokens.Elevation.Subtle,
+        shape = MaterialTheme.shapes.medium,
+    ) {
+        Column(
+            modifier = Modifier.padding(
+                horizontal = UiTokens.Spacing.Large,
+                vertical = UiTokens.Spacing.Medium,
+            ),
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(
+                    imageVector = Icons.Default.NewReleases,
+                    contentDescription = null,
+                    tint = semanticColors.info,
+                    modifier = Modifier.size(UiTokens.Size.IconMedium),
+                )
+                Spacer(Modifier.width(UiTokens.Spacing.Small))
+                Text(
+                    text = "发现新版本",
+                    style = MaterialTheme.typography.labelLarge,
+                )
+            }
+
+            Spacer(Modifier.height(UiTokens.Spacing.ExtraSmall))
+            Text(
+                text = "新版本 $versionName 已发布，点击下载更新",
+                style = MaterialTheme.typography.bodySmall,
+            )
+
+            Spacer(Modifier.height(UiTokens.Spacing.Small))
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.End,
+            ) {
+                TextButton(
+                    onClick = onDismiss,
+                    colors = ButtonDefaults.textButtonColors(
+                        contentColor = semanticColors.onInfoContainer.copy(alpha = 0.7f),
+                    ),
+                ) {
+                    Text("忽略此版本")
+                }
+                Spacer(Modifier.width(UiTokens.Spacing.Small))
+                TextButton(onClick = { onDownload(releaseUrl) }) {
+                    Text("下载更新")
+                }
+            }
+        }
+    }
+}

android/app/src/main/java/com/tsmobile/app/ui/components/UpdateCheckDialog.kt

@@ -0,0 +1,232 @@
+package com.tsmobile.app.ui.components
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.CheckCircle
+import androidx.compose.material.icons.filled.Error
+import androidx.compose.material.icons.filled.NewReleases
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.tsmobile.app.ui.theme.UiTokens
+import com.tsmobile.app.viewmodel.UpdateInfo
+
+/**
+ * 手动检查更新的结果状态。
+ */
+sealed class UpdateCheckResult {
+    /** 正在检查中 */
+    data object Checking : UpdateCheckResult()
+    /** 发现新版本 */
+    data class UpdateAvailable(val info: UpdateInfo) : UpdateCheckResult()
+    /** 已经是最新版 */
+    data object NoUpdate : UpdateCheckResult()
+    /** 检查失败 */
+    data class Error(val message: String) : UpdateCheckResult()
+}
+
+/**
+ * 更新检查弹窗。
+ *
+ * 点击"检查更新"后弹出，显示检查过程和结果。
+ * - 检查中：旋转进度 + "正在检查更新..."
+ * - 有新版本：版本号 + 下载/忽略按钮
+ * - 无更新：绿色对勾 + "已经是最新版"
+ * - 失败：错误图标 + 错误信息 + 重试/关闭按钮
+ */
+@Composable
+fun UpdateCheckDialog(
+    result: UpdateCheckResult,
+    onDownload: (String) -> Unit,
+    onDismissVersion: () -> Unit,
+    onRetry: () -> Unit,
+    onClose: () -> Unit,
+) {
+    AlertDialog(
+        onDismissRequest = { if (result !is UpdateCheckResult.Checking) onClose() },
+        shape = MaterialTheme.shapes.extraLarge,
+        tonalElevation = UiTokens.Elevation.Floating,
+        title = {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                when (result) {
+                    is UpdateCheckResult.Checking -> {
+                        CircularProgressIndicator(
+                            modifier = Modifier.size(UiTokens.Size.IconMedium),
+                            strokeWidth = UiTokens.Border.Emphasized,
+                        )
+                        Spacer(Modifier.width(UiTokens.Spacing.Medium))
+                        Text("检查更新")
+                    }
+                    is UpdateCheckResult.UpdateAvailable -> {
+                        Icon(
+                            imageVector = Icons.Default.NewReleases,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.size(UiTokens.Size.IconMedium),
+                        )
+                        Spacer(Modifier.width(UiTokens.Spacing.Medium))
+                        Text("发现新版本")
+                    }
+                    is UpdateCheckResult.NoUpdate -> {
+                        Icon(
+                            imageVector = Icons.Default.CheckCircle,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.size(UiTokens.Size.IconMedium),
+                        )
+                        Spacer(Modifier.width(UiTokens.Spacing.Medium))
+                        Text("检查完成")
+                    }
+                    is UpdateCheckResult.Error -> {
+                        Icon(
+                            imageVector = Icons.Default.Error,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.error,
+                            modifier = Modifier.size(UiTokens.Size.IconMedium),
+                        )
+                        Spacer(Modifier.width(UiTokens.Spacing.Medium))
+                        Text("检查失败")
+                    }
+                }
+            }
+        },
+        text = {
+            Column {
+                AnimatedVisibility(
+                    visible = result is UpdateCheckResult.Checking,
+                    enter = fadeIn(),
+                    exit = fadeOut(),
+                ) {
+                    Text(
+                        text = "正在连接服务器检查更新...",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+
+                AnimatedVisibility(
+                    visible = result is UpdateCheckResult.UpdateAvailable,
+                    enter = fadeIn(),
+                    exit = fadeOut(),
+                ) {
+                    val info = (result as? UpdateCheckResult.UpdateAvailable)?.info
+                    if (info != null) {
+                        Column {
+                            Text(
+                                text = "新版本 ${info.versionName} 已发布",
+                                style = MaterialTheme.typography.bodyMedium,
+                            )
+                            Spacer(Modifier.height(UiTokens.Spacing.ExtraSmall))
+                            Text(
+                                text = "建议下载最新版本以获得更好的体验。",
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+
+                            // 更新内容（支持滚动）
+                            if (info.body.isNotBlank()) {
+                                Spacer(Modifier.height(UiTokens.Spacing.Medium))
+                                Surface(
+                                    color = MaterialTheme.colorScheme.surfaceContainerLow,
+                                    shape = MaterialTheme.shapes.small,
+                                ) {
+                                    Column(
+                                        modifier = Modifier
+                                            .heightIn(max = 200.dp)
+                                            .verticalScroll(rememberScrollState())
+                                            .padding(UiTokens.Spacing.Medium),
+                                    ) {
+                                        Text(
+                                            text = "更新内容",
+                                            style = MaterialTheme.typography.labelMedium,
+                                            color = MaterialTheme.colorScheme.primary,
+                                        )
+                                        Spacer(Modifier.height(UiTokens.Spacing.ExtraSmall))
+                                        Text(
+                                            text = info.body,
+                                            style = MaterialTheme.typography.bodySmall,
+                                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                        )
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+
+                AnimatedVisibility(
+                    visible = result is UpdateCheckResult.NoUpdate,
+                    enter = fadeIn(),
+                    exit = fadeOut(),
+                ) {
+                    Text(
+                        text = "已经是最新版，无需更新。",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+
+                AnimatedVisibility(
+                    visible = result is UpdateCheckResult.Error,
+                    enter = fadeIn(),
+                    exit = fadeOut(),
+                ) {
+                    val msg = (result as? UpdateCheckResult.Error)?.message ?: ""
+                    Text(
+                        text = msg.ifBlank { "网络连接失败，请稍后重试" },
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+            }
+        },
+        confirmButton = {
+            when (result) {
+                is UpdateCheckResult.Checking -> {
+                    // 检查中不显示按钮
+                }
+                is UpdateCheckResult.UpdateAvailable -> {
+                    TextButton(
+                        onClick = { onDismissVersion() },
+                    ) {
+                        Text("忽略此版本")
+                    }
+                    Spacer(Modifier.width(UiTokens.Spacing.Small))
+                    Button(
+                        onClick = { onDownload(result.info.releaseUrl) },
+                    ) {
+                        Text("下载更新")
+                    }
+                }
+                is UpdateCheckResult.NoUpdate -> {
+                    Button(onClick = onClose) {
+                        Text("确定")
+                    }
+                }
+                is UpdateCheckResult.Error -> {
+                    TextButton(onClick = onClose) {
+                        Text("关闭")
+                    }
+                    Spacer(Modifier.width(UiTokens.Spacing.Small))
+                    Button(onClick = onRetry) {
+                        Text("重试")
+                    }
+                }
+            }
+        },
+        dismissButton = {
+            if (result is UpdateCheckResult.UpdateAvailable ||
+                result is UpdateCheckResult.Error
+            ) {
+                // 关闭按钮在 confirmButton 区域已处理
+            }
+        },
+    )
+}

android/app/src/main/java/com/tsmobile/app/ui/components/VoiceCard.kt

@@ -118,7 +118,7 @@ fun VoiceCard(
                 .heightIn(min = 280.dp, max = 560.dp),
             verticalArrangement = Arrangement.spacedBy(UiTokens.Spacing.ExtraSmall),
         ) {
-            items(members, key = { it.id }) { member ->
+            items(members.distinctBy { it.id }, key = { it.id }) { member ->
                 MemberRow(
                     name = member.nickname,
                     isSelf = member.isSelf,

android/app/src/main/java/com/tsmobile/app/ui/navigation/NavGraph.kt

@@ -3,16 +3,20 @@ package com.tsmobile.app.ui.navigation
 import androidx.activity.compose.BackHandler
 import androidx.compose.animation.EnterTransition
 import androidx.compose.animation.ExitTransition
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import com.tsmobile.app.data.ConnectionState
 import com.tsmobile.app.data.Repository
+import com.tsmobile.app.ui.components.PokeNotification
 import com.tsmobile.app.ui.screens.ChannelListScreen
 import com.tsmobile.app.ui.screens.ChatScreen
 import com.tsmobile.app.ui.screens.KickedScreen
@@ -50,6 +54,7 @@ fun AppNavGraph(
         serverViewModel.channelViewModel = channelViewModel
         serverViewModel.chatViewModel = chatViewModel
         serverViewModel.voiceViewModel = voiceViewModel
+        channelViewModel.chatViewModel = chatViewModel
     }
 
     // 观察连接状态变化，处理导航
@@ -80,100 +85,113 @@ fun AppNavGraph(
         }
     }
 
-    NavHost(
-        navController = navController,
-        startDestination = Routes.SERVER_CONFIG,
-        // 禁用默认的淡入淡出动画，避免页面切换显得迟钝
-        enterTransition = { EnterTransition.None },
-        exitTransition = { ExitTransition.None },
-        popEnterTransition = { EnterTransition.None },
-        popExitTransition = { ExitTransition.None },
-    ) {
-        // 服务器配置页
-        composable(Routes.SERVER_CONFIG) {
-            ServerConfigScreen(
-                viewModel = serverViewModel,
-                onNavigateToChannelList = {
-                    navController.navigate(Routes.CHANNEL_LIST) {
-                        popUpTo(Routes.SERVER_CONFIG) { inclusive = true }
-                    }
-                },
-            )
-        }
+    // 全局 Poke 气泡通知（覆盖在所有页面上方）
+    val showPokeNotification by serverViewModel.showPokeNotification.collectAsState()
+    val pokeNotification by serverViewModel.pokeNotification.collectAsState()
 
-        // 频道列表页
-        composable(Routes.CHANNEL_LIST) {
-            ChannelListScreen(
-                channelViewModel = channelViewModel,
-                voiceViewModel = voiceViewModel,
-                serverViewModel = serverViewModel,
-                onNavigateToChat = {
-                    if (navController.currentDestination?.route == Routes.CHANNEL_LIST) {
-                        navController.navigate(Routes.CHAT) {
-                            launchSingleTop = true
+    Box(modifier = Modifier.fillMaxSize()) {
+        NavHost(
+            navController = navController,
+            startDestination = Routes.SERVER_CONFIG,
+            // 禁用默认的淡入淡出动画，避免页面切换显得迟钝
+            enterTransition = { EnterTransition.None },
+            exitTransition = { ExitTransition.None },
+            popEnterTransition = { EnterTransition.None },
+            popExitTransition = { ExitTransition.None },
+        ) {
+            // 服务器配置页
+            composable(Routes.SERVER_CONFIG) {
+                ServerConfigScreen(
+                    viewModel = serverViewModel,
+                    onNavigateToChannelList = {
+                        navController.navigate(Routes.CHANNEL_LIST) {
+                            popUpTo(Routes.SERVER_CONFIG) { inclusive = true }
                         }
-                    }
-                },
-                onNavigateToServerConfig = {
-                    serverViewModel.disconnect()
-                    navController.navigate(Routes.SERVER_CONFIG) {
-                        popUpTo(Routes.CHANNEL_LIST) { inclusive = true }
-                    }
-                },
-            )
-        }
-
-        // 聊天页
-        composable(Routes.CHAT) {
-            // 进入聊天页：加载当前频道的消息
-            val currentChannelId by channelViewModel.currentChannelId.collectAsState()
-            LaunchedEffect(currentChannelId) {
-                var channelIdLong = currentChannelId.toLongOrNull() ?: 0L
-                // 备用方案：如果 Repository.currentChannelId 为 "0"（GetChannelID 失败），
-                // 从客户端列表中获取自身所在的频道 ID
-                if (channelIdLong <= 0L) {
-                    channelIdLong = Repository.getSelfChannelId().toLongOrNull() ?: 0L
-                }
-                if (channelIdLong > 0L) {
-                    chatViewModel.enterChat(2, channelIdLong)
-                }
+                    },
+                )
             }
 
-            val leaveChat = {
-                if (navController.currentDestination?.route == Routes.CHAT &&
-                    navController.popBackStack(Routes.CHANNEL_LIST, inclusive = false)
-                ) {
-                    chatViewModel.leaveChat()
-                }
+            // 频道列表页
+            composable(Routes.CHANNEL_LIST) {
+                ChannelListScreen(
+                    channelViewModel = channelViewModel,
+                    voiceViewModel = voiceViewModel,
+                    serverViewModel = serverViewModel,
+                    onNavigateToChat = {
+                        if (navController.currentDestination?.route == Routes.CHANNEL_LIST) {
+                            navController.navigate(Routes.CHAT) {
+                                launchSingleTop = true
+                            }
+                        }
+                    },
+                    onNavigateToServerConfig = {
+                        serverViewModel.disconnect()
+                        navController.navigate(Routes.SERVER_CONFIG) {
+                            popUpTo(Routes.CHANNEL_LIST) { inclusive = true }
+                        }
+                    },
+                )
             }
-            BackHandler(onBack = leaveChat)
 
-            ChatScreen(
-                chatViewModel = chatViewModel,
-                channelViewModel = channelViewModel,
-                voiceViewModel = voiceViewModel,
-                serverViewModel = serverViewModel,
-                onNavigateBack = leaveChat,
-                onOpenChannelDetail = { channelId ->
-                    channelViewModel.openChannelDetailCard(channelId)
-                },
-            )
-        }
-
-        // 被踢页面
-        composable(Routes.KICKED) {
-            val kickReason by serverViewModel.kickReason.collectAsState()
-            KickedScreen(
-                reason = kickReason,
-                onReconnect = { serverViewModel.reconnectAfterKick() },
-                onBackToHome = {
-                    serverViewModel.backToHome()
-                    navController.navigate(Routes.SERVER_CONFIG) {
-                        popUpTo(Routes.KICKED) { inclusive = true }
+            // 聊天页
+            composable(Routes.CHAT) {
+                // 进入聊天页：加载当前频道的消息
+                val currentChannelId by channelViewModel.currentChannelId.collectAsState()
+                LaunchedEffect(currentChannelId) {
+                    var channelIdLong = currentChannelId.toLongOrNull() ?: 0L
+                    // 备用方案：如果 Repository.currentChannelId 为 "0"（GetChannelID 失败），
+                    // 从客户端列表中获取自身所在的频道 ID
+                    if (channelIdLong <= 0L) {
+                        channelIdLong = Repository.getSelfChannelId().toLongOrNull() ?: 0L
                     }
-                },
-            )
+                    if (channelIdLong > 0L) {
+                        chatViewModel.enterChat(2, channelIdLong)
+                    }
+                }
+
+                val leaveChat = {
+                    if (navController.currentDestination?.route == Routes.CHAT &&
+                        navController.popBackStack(Routes.CHANNEL_LIST, inclusive = false)
+                    ) {
+                        chatViewModel.leaveChat()
+                    }
+                }
+                BackHandler(onBack = leaveChat)
+
+                ChatScreen(
+                    chatViewModel = chatViewModel,
+                    channelViewModel = channelViewModel,
+                    voiceViewModel = voiceViewModel,
+                    serverViewModel = serverViewModel,
+                    onNavigateBack = leaveChat,
+                    onOpenChannelDetail = { channelId ->
+                        channelViewModel.openChannelDetailCard(channelId)
+                    },
+                )
+            }
+
+            // 被踢页面
+            composable(Routes.KICKED) {
+                val kickReason by serverViewModel.kickReason.collectAsState()
+                KickedScreen(
+                    reason = kickReason,
+                    onReconnect = { serverViewModel.reconnectAfterKick() },
+                    onBackToHome = {
+                        serverViewModel.backToHome()
+                        navController.navigate(Routes.SERVER_CONFIG) {
+                            popUpTo(Routes.KICKED) { inclusive = true }
+                        }
+                    },
+                )
+            }
         }
+
+        // Poke 气泡通知（全局覆盖层）
+        PokeNotification(
+            pokeEvent = pokeNotification,
+            isVisible = showPokeNotification,
+            onDismiss = { serverViewModel.dismissPokeNotification() },
+        )
     }
 }
 

android/app/src/main/java/com/tsmobile/app/ui/screens/ChannelListScreen.kt

@@ -83,10 +83,6 @@ fun ChannelListScreen(
     val channelDetail by channelViewModel.channelDetailInfo.collectAsState()
     val currentChannelId by channelViewModel.currentChannelId.collectAsState()
 
-    // Poke 通知
-    val showPokeNotification by serverViewModel.showPokeNotification.collectAsState()
-    val pokeNotification by serverViewModel.pokeNotification.collectAsState()
-
     // ViewModel 重建保护：如果 syncState 不是 Synchronized（ViewModel 被系统回收后重建），
     // 重新触发首次同步，否则频道列表页会永远停在加载态。
     LaunchedEffect(Unit) {
@@ -189,14 +185,6 @@ fun ChannelListScreen(
             )
         }
 
-        // ─── 全局浮动通知 ───
-
-        // Poke 通知（顶部气泡）
-        PokeNotification(
-            pokeEvent = pokeNotification,
-            isVisible = showPokeNotification,
-            onDismiss = { serverViewModel.dismissPokeNotification() },
-        )
     }
 
     // ─── 弹窗层 ───

android/app/src/main/java/com/tsmobile/app/ui/screens/ChatScreen.kt

@@ -5,6 +5,7 @@ import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
 import androidx.compose.foundation.layout.imePadding
+import androidx.compose.ui.platform.LocalFocusManager
 import com.tsmobile.app.data.ChannelInfo
 import com.tsmobile.app.ui.components.ChannelDetailCard
 import com.tsmobile.app.ui.components.ChatHeader
@@ -48,6 +49,7 @@ fun ChatScreen(
 
     val currentChannel = channels.find { it.id == currentChannelId }
     val clients = channelClients[currentChannelId] ?: emptyList()
+    val focusManager = LocalFocusManager.current
 
     Column(
         modifier = Modifier
@@ -83,19 +85,29 @@ fun ChatScreen(
         // 底部：语音控制栏（固定在底部，不受键盘影响）
         VoiceControlBar(
             voiceViewModel = voiceViewModel,
-            onExpand = { showVoiceCard = true },
+            onExpand = {
+                focusManager.clearFocus()
+                voiceViewModel.openVoiceCard()
+                showVoiceCard = true
+            },
         )
     }
 
     // 语音卡弹窗（BottomSheet）
     if (showVoiceCard) {
         ModalBottomSheet(
-            onDismissRequest = { showVoiceCard = false },
+            onDismissRequest = {
+                showVoiceCard = false
+                voiceViewModel.closeVoiceCard()
+            },
         ) {
             VoiceCard(
                 voiceViewModel = voiceViewModel,
                 channelViewModel = channelViewModel,
-                onDismiss = { showVoiceCard = false },
+                onDismiss = {
+                    showVoiceCard = false
+                    voiceViewModel.closeVoiceCard()
+                },
                 onPokeClient = { clientId, message ->
                     serverViewModel.pokeClient(clientId, message)
                 },

android/app/src/main/java/com/tsmobile/app/ui/screens/ServerConfigScreen.kt

@@ -10,7 +10,9 @@ import androidx.compose.material.icons.filled.DarkMode
 import androidx.compose.material.icons.filled.LightMode
 import androidx.compose.material.icons.filled.SettingsBrightness
 import androidx.compose.material.icons.filled.Dns
+import androidx.compose.material.icons.filled.SystemUpdate
 import com.tsmobile.app.ui.theme.ThemeMode
+import com.tsmobile.app.ui.theme.UiTokens
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -23,6 +25,7 @@ import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import com.tsmobile.app.data.RecentConnection
 import com.tsmobile.app.ui.components.ConnectButton
+import com.tsmobile.app.ui.components.UpdateCheckDialog
 import com.tsmobile.app.viewmodel.ConnectState
 import com.tsmobile.app.viewmodel.ServerViewModel
 import com.tsmobile.app.viewmodel.formatRelativeTime
@@ -48,7 +51,9 @@ fun ServerConfigScreen(
         // 上：品牌区
         BrandSection(
             themeMode = themeMode,
-            onToggleTheme = { viewModel.toggleTheme() }
+            onToggleTheme = { viewModel.toggleTheme() },
+            isCheckingUpdate = state.isCheckingUpdate,
+            onCheckUpdate = { viewModel.manualCheckUpdate() },
         )
 
         // 中：输入区
@@ -80,13 +85,30 @@ fun ServerConfigScreen(
             onNavigateToChannelList()
         }
     }
+
+    // 手动检查更新弹窗
+    val updateCheckResult by viewModel.updateCheckResult.collectAsState()
+    updateCheckResult?.let { result ->
+        UpdateCheckDialog(
+            result = result,
+            onDownload = { url -> viewModel.openReleaseUrl(url) },
+            onDismissVersion = { viewModel.dismissUpdate() },
+            onRetry = { viewModel.manualCheckUpdate() },
+            onClose = { viewModel.closeUpdateDialog() },
+        )
+    }
 }
 
 /**
  * 品牌区组件。
  */
 @Composable
-private fun BrandSection(themeMode: ThemeMode, onToggleTheme: () -> Unit) {
+private fun BrandSection(
+    themeMode: ThemeMode,
+    onToggleTheme: () -> Unit,
+    isCheckingUpdate: Boolean = false,
+    onCheckUpdate: () -> Unit = {},
+) {
     Box(
         modifier = Modifier
             .fillMaxWidth()
@@ -115,6 +137,29 @@ private fun BrandSection(themeMode: ThemeMode, onToggleTheme: () -> Unit) {
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
         }
+
+        // 检查更新按钮（左上角）
+        IconButton(
+            onClick = onCheckUpdate,
+            enabled = !isCheckingUpdate,
+            modifier = Modifier
+                .align(Alignment.TopStart)
+                .padding(start = 8.dp),
+        ) {
+            if (isCheckingUpdate) {
+                CircularProgressIndicator(
+                    modifier = Modifier.size(UiTokens.Size.IconMedium),
+                    strokeWidth = UiTokens.Border.Emphasized,
+                )
+            } else {
+                Icon(
+                    imageVector = Icons.Default.SystemUpdate,
+                    contentDescription = "检查更新",
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+
         // 主题切换按钮（右上角）
         IconButton(
             onClick = onToggleTheme,

android/app/src/main/java/com/tsmobile/app/viewmodel/ChannelViewModel.kt

@@ -65,6 +65,9 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
 
     private val json = Json { ignoreUnknownKeys = true }
 
+    // ChatViewModel 引用（由 ServerViewModel 设置）
+    var chatViewModel: ChatViewModel? = null
+
     // 频道列表最后刷新时间
     private var lastChannelRefreshTime: Long = 0
 
@@ -82,10 +85,6 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
     private val _expandedChannelIds = MutableStateFlow<Set<String>>(emptySet())
     val expandedChannelIds: StateFlow<Set<String>> = _expandedChannelIds.asStateFlow()
 
-    // 未读消息标记（当前频道外是否有新消息）
-    private val _hasUnreadMessage = MutableStateFlow(false)
-    val hasUnreadMessage: StateFlow<Boolean> = _hasUnreadMessage.asStateFlow()
-
     // --- 当前频道 ---
     val currentChannelId: StateFlow<String> = Repository.currentChannelId
 
@@ -127,7 +126,6 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
     fun clearChannels() {
         _syncState.value = SyncState.Unsynced
         _expandedChannelIds.value = emptySet()
-        _hasUnreadMessage.value = false
         _switchState.value = ChannelSwitchState.Idle
         _showSwitchDialog.value = false
         _pendingSwitchChannel.value = null
@@ -275,12 +273,7 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
             Log.d(TAG, "Channel list stale, refreshing...")
             val channelsJson = TSBridge.getChannelsJSON()
             val channels = json.decodeFromString<List<ChannelInfo>>(channelsJson)
-            Repository.updateBaseline(
-                channels,
-                Repository.clients.value,
-                Repository.selfClientId.value,
-                Repository.currentChannelId.value,
-            )
+            Repository.updateChannels(channels)
             lastChannelRefreshTime = System.currentTimeMillis()
             Log.d(TAG, "Channel list refreshed: ${channels.size} channels")
         } catch (e: Exception) {
@@ -291,49 +284,80 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
 
     /**
      * 处理客户端进入事件（增量同步）。
+     * 刷新后对比当前频道成员，检测新加入者并发送系统消息。
      */
     fun handleClientEnter() {
         Log.d(TAG, "Client enter: refreshing client list")
         viewModelScope.launch {
+            val snapshot = snapshotCurrentChannelClients()
             Repository.refreshClientList()
+            notifyMemberChanges(snapshot, "加入")
         }
     }
 
     /**
      * 处理客户端离开事件。
-     * 全量刷新客户端列表（人员变动统一用全量更新）。
+     * 刷新后对比当前频道成员，检测离开者并发送系统消息。
      */
     fun handleClientLeave(clientId: Int, reasonMsg: String) {
         Log.d(TAG, "Client leave: $clientId, reason: $reasonMsg")
         viewModelScope.launch {
+            val snapshot = snapshotCurrentChannelClients()
             Repository.refreshClientList()
+            notifyMemberChanges(snapshot, "离开")
         }
     }
 
     /**
-     * 处理文字消息（未读指示）。
-     * 只需标记"当前频道外有新消息"，不追踪具体频道。
+     * 快照当前频道的成员 ID 和昵称。
+     * 离开事件后 clientMap 会更新，所以需要提前保存昵称。
      */
-    fun onTextMessage(targetMode: Int, targetId: String) {
-        if (targetMode != 2) return
-        if (targetId != Repository.currentChannelId.value) {
-            _hasUnreadMessage.value = true
-        }
+    private fun snapshotCurrentChannelClients(): Map<Int, String> {
+        val channelId = Repository.currentChannelId.value
+        return Repository.channelClients.value[channelId]
+            ?.associate { it.id to it.nickname }
+            ?: emptyMap()
     }
 
     /**
-     * 清除未读标记。
+     * 对比快照与刷新后的当前频道成员，检测变动并发送系统消息。
+     * @param before 变动前的 {clientId → nickname} 快照
+     * @param action "加入" 或 "离开"
      */
-    fun clearUnread() {
-        _hasUnreadMessage.value = false
+    private fun notifyMemberChanges(before: Map<Int, String>, action: String) {
+        val channelId = Repository.currentChannelId.value
+        val after = Repository.channelClients.value[channelId]
+            ?.map { it.id }
+            ?.toSet()
+            ?: emptySet()
+
+        val changedIds = if (action == "加入") {
+            after - before.keys
+        } else {
+            before.keys - after
+        }
+
+        if (changedIds.isEmpty()) return
+
+        val cvm = chatViewModel ?: return
+        for (id in changedIds) {
+            val nickname = if (action == "加入") {
+                Repository.getClient(id)?.nickname ?: id.toString()
+            } else {
+                before[id] ?: id.toString()
+            }
+            cvm.addSystemMessage("$nickname $action 当前频道")
+        }
     }
 
     /**
      * 切换频道展开/折叠状态。
      */
     fun toggleExpand(channelId: String) {
-        _expandedChannelIds.value = _expandedChannelIds.value.toMutableSet().apply {
-            if (contains(channelId)) remove(channelId) else add(channelId)
+        _expandedChannelIds.update { current ->
+            current.toMutableSet().apply {
+                if (contains(channelId)) remove(channelId) else add(channelId)
+            }
         }
     }
 
@@ -356,7 +380,7 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
             }
         }
 
-        _expandedChannelIds.value = expandedWithParents
+        _expandedChannelIds.update { expandedWithParents }
     }
 
     /**
@@ -367,6 +391,9 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
         clients: List<ClientInfo>,
         expandedIds: Set<String>,
     ): List<ChannelTreeNode> {
+        // 预计算：按频道 ID 分组客户端（O(n) 一次，替代递归中 O(n) 每次）
+        val clientsByChannel = clients.groupBy { it.channelId }
+
         // 找出自引用的根频道（id == parentId），这些频道需要特殊处理
         val selfRefRoots = channels.filter { it.id == it.parentId }
         // 排除自引用频道后的正常频道列表
@@ -386,7 +413,7 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
                 return ChannelTreeNode(
                     channel = channel,
                     children = emptyList(),
-                    clients = clients.filter { it.channelId == channel.id },
+                    clients = clientsByChannel[channel.id] ?: emptyList(),
                     isExpanded = expandedIds.contains(channel.id),
                 )
             }
@@ -394,12 +421,11 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
             val children = (childrenMap[channel.id] ?: emptyList())
                 .sortedBy { it.order }
                 .map { buildNode(it) }
-            val channelClients = clients.filter { it.channelId == channel.id }
 
             return ChannelTreeNode(
                 channel = channel,
                 children = children,
-                clients = channelClients,
+                clients = clientsByChannel[channel.id] ?: emptyList(),
                 isExpanded = expandedIds.contains(channel.id),
             )
         }
@@ -413,7 +439,7 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
             ChannelTreeNode(
                 channel = root,
                 children = emptyList(),
-                clients = clients.filter { it.channelId == root.id },
+                clients = clientsByChannel[root.id] ?: emptyList(),
                 isExpanded = expandedIds.contains(root.id),
             )
         }
@@ -502,6 +528,12 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
                         if (_switchState.value is ChannelSwitchState.WaitingServerEvent) {
                             Log.w(TAG, "Channel switch timeout waiting for server event")
                             _switchState.value = ChannelSwitchState.Failed("等待服务端确认超时")
+                            // 8 秒后自动清除失败状态
+                            delay(8_000)
+                            if (_switchState.value is ChannelSwitchState.Failed) {
+                                _switchState.value = ChannelSwitchState.Idle
+                                _pendingSwitchChannel.value = null
+                            }
                         }
                     }
 
@@ -550,9 +582,8 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
             Repository.refreshClientList()
         }
 
-        // 更新当前频道 ID 并清除未读
+        // 更新当前频道 ID
         Repository.setCurrentChannelId(targetChannelId)
-        clearUnread()
 
         when (currentState) {
             is ChannelSwitchState.WaitingServerEvent -> {
@@ -582,10 +613,21 @@ class ChannelViewModel(application: Application) : AndroidViewModel(application)
     /**
      * 处理其他用户的移动事件。
      * 全量刷新客户端列表（人员变动统一用全量更新）。
+     * 根据移动方向检测"加入"或"离开"当前频道。
      */
     private fun handleOtherClientMoved(clientId: Int, targetChannelId: String) {
         viewModelScope.launch {
+            val currentChannelId = Repository.currentChannelId.value
+            val snapshot = snapshotCurrentChannelClients()
             Repository.refreshClientList()
+
+            if (targetChannelId == currentChannelId) {
+                // 移入当前频道 → 检测"加入"
+                notifyMemberChanges(snapshot, "加入")
+            } else if (snapshot.containsKey(clientId)) {
+                // 从当前频道移出 → 检测"离开"
+                notifyMemberChanges(snapshot, "离开")
+            }
         }
     }
 

android/app/src/main/java/com/tsmobile/app/viewmodel/ChatViewModel.kt

@@ -8,6 +8,7 @@ import com.tsmobile.app.TSBridge
 import com.tsmobile.app.data.ChatMessage
 import com.tsmobile.app.data.MessageDeliveryState
 import com.tsmobile.app.data.MessageSendState
+import com.tsmobile.app.data.MessageType
 import com.tsmobile.app.data.Repository
 import com.tsmobile.app.data.parseFileMessageMeta
 import kotlinx.coroutines.Job
@@ -15,7 +16,9 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import java.util.concurrent.ConcurrentHashMap
 
 class ChatViewModel(application: Application) : AndroidViewModel(application) {
 
@@ -37,12 +40,12 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
     private var currentTargetMode: Int = 2
     private var currentTargetId: Long = 0
 
-    // 送达确认超时 Job
-    private var deliveryTimeoutJob: Job? = null
+    // 送达确认超时 Job（每条消息独立管理，避免快速发送时相互覆盖）
+    private val deliveryTimeoutJobs = ConcurrentHashMap<String, Job>()
 
     /**
      * 进入聊天页。
-     * 加载消息并清除未读标记。
+     * 加载消息并设置活跃会话标识。
      */
     fun enterChat(targetMode: Int, targetId: Long) {
         currentTargetMode = targetMode
@@ -50,7 +53,6 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
 
         Repository.setActiveChat(targetMode, targetId)
         _messages.value = Repository.getMessages(targetMode, targetId)
-        Repository.clearUnread(targetMode, targetId)
 
         Log.d(TAG, "Entered chat: mode=$targetMode, target=$targetId, messages=${_messages.value.size}")
     }
@@ -61,7 +63,8 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
     fun leaveChat() {
         Repository.setActiveChat(null, null)
         _sendState.value = MessageSendState.Idle()
-        deliveryTimeoutJob?.cancel()
+        deliveryTimeoutJobs.values.forEach { it.cancel() }
+        deliveryTimeoutJobs.clear()
         Log.d(TAG, "Left chat")
     }
 
@@ -71,11 +74,32 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
     fun clearMessages() {
         _messages.value = emptyList()
         _sendState.value = MessageSendState.Idle()
-        deliveryTimeoutJob?.cancel()
+        deliveryTimeoutJobs.values.forEach { it.cancel() }
+        deliveryTimeoutJobs.clear()
         currentTargetMode = 2
         currentTargetId = 0
     }
 
+    /**
+     * 添加系统消息（频道成员变动等提示）。
+     * 归档到 Repository 并刷新当前列表。
+     */
+    fun addSystemMessage(content: String) {
+        val message = ChatMessage(
+            id = "sys_${System.currentTimeMillis()}",
+            targetMode = 2,
+            targetId = Repository.currentChannelId.value.toLongOrNull() ?: 0L,
+            senderId = 0,
+            senderName = "",
+            content = content,
+            timestamp = System.currentTimeMillis(),
+            isSelf = false,
+            messageType = MessageType.SYSTEM,
+        )
+        Repository.archiveMessage(message)
+        refreshMessages()
+    }
+
     /**
      * 发送文本消息。
      *
@@ -97,7 +121,7 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
         _sendState.value = MessageSendState.Sending
 
         val selfId = Repository.selfClientId.value
-        val selfName = Repository.clients.value.find { it.id == selfId }?.nickname ?: ""
+        val selfName = Repository.getClient(selfId)?.nickname ?: ""
 
         // 生成唯一 ID（用于匹配回显）
         val messageId = "local_${System.currentTimeMillis()}_${selfId}"
@@ -155,13 +179,14 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
     /**
      * 启动送达确认超时。
      * 如果在 DELIVERY_TIMEOUT_MS 内没有收到回显，标记为 FAILED。
+     * 每条消息独立管理超时 Job，快速发送多条消息时互不影响。
      */
     private fun startDeliveryTimeout(messageId: String) {
-        deliveryTimeoutJob?.cancel()
-        deliveryTimeoutJob = viewModelScope.launch {
+        val job = viewModelScope.launch {
             delay(DELIVERY_TIMEOUT_MS)
 
             // 超时：检查消息是否仍然是 PENDING
+            deliveryTimeoutJobs.remove(messageId)
             val messages = _messages.value
             val pending = messages.find {
                 it.id == messageId && it.deliveryState == MessageDeliveryState.PENDING
@@ -171,21 +196,25 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
                 markMessageFailed(messageId)
             }
         }
+        deliveryTimeoutJobs[messageId] = job
     }
 
     /**
      * 标记指定消息为 FAILED。
      */
     private fun markMessageFailed(messageId: String) {
-        // 更新本地 _messages 快照
-        val updated = _messages.value.map { msg ->
-            if (msg.id == messageId && msg.deliveryState == MessageDeliveryState.PENDING) {
-                msg.copy(deliveryState = MessageDeliveryState.FAILED)
-            } else {
-                msg
+        // 清理超时 Job
+        deliveryTimeoutJobs.remove(messageId)?.cancel()
+        // 原子更新本地 _messages 快照（避免与 refreshMessages 并发覆盖）
+        _messages.update { current ->
+            current.map { msg ->
+                if (msg.id == messageId && msg.deliveryState == MessageDeliveryState.PENDING) {
+                    msg.copy(deliveryState = MessageDeliveryState.FAILED)
+                } else {
+                    msg
+                }
             }
         }
-        _messages.value = updated
 
         // 同步更新 Repository 归档（确保导航离开再回来时状态不丢失）
         Repository.markMessageDeliveryFailed(currentTargetMode, currentTargetId, messageId)
@@ -214,13 +243,12 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
             Log.d(TAG, "handleTextMessage JSON content: $content")
         }
 
-        // 无论 isSelf，始终尝试匹配 PENDING 消息（送达确认）。
-        // 原因：gomobile 的 TextMsg 不含 InvokerID，senderId 通过 UID 反查 clientId，
-        // 如果客户端列表未同步（selfUid=null），senderId 会是 0 ≠ selfId，导致 isSelf=false。
-        val confirmed = Repository.confirmMessageDelivery(targetMode, targetId, senderId, content)
-        if (confirmed) {
-            Log.d(TAG, "Delivery confirmed: content=$content")
-            deliveryTimeoutJob?.cancel()
+        // 尝试匹配 PENDING 消息（送达确认）。
+        // AAR 已支持 InvokerID，senderId 可靠。仍保留降级逻辑：senderId=0 时仅匹配 content。
+        val confirmedId = Repository.confirmMessageDelivery(targetMode, targetId, senderId, content)
+        if (confirmedId != null) {
+            Log.d(TAG, "Delivery confirmed: id=$confirmedId, content=$content")
+            deliveryTimeoutJobs.remove(confirmedId)?.cancel()
             if (targetMode == currentTargetMode && targetId == currentTargetId) {
                 refreshMessages()
             }

android/app/src/main/java/com/tsmobile/app/viewmodel/ServerViewModel.kt

@@ -9,10 +9,20 @@ import com.tsmobile.app.data.*
 import com.tsmobile.app.ui.theme.ThemeMode
 import teamspeak.TextMsg
 import teamspeak.Client
+import teamspeak.Teamspeak
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.delay
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Intent
+import android.net.Uri
+import androidx.core.app.NotificationCompat
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.ProcessLifecycleOwner
+import com.tsmobile.app.App
+import com.tsmobile.app.MainActivity
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.json.Json
@@ -46,6 +56,16 @@ data class ServerScreenState(
     val connectState: ConnectState = ConnectState.IDLE,
     val errorMessage: String? = null,
     val validationErrors: ValidationErrors = ValidationErrors(),
+    val isCheckingUpdate: Boolean = false,
+)
+
+/**
+ * 更新检测信息。
+ */
+data class UpdateInfo(
+    val versionName: String,
+    val releaseUrl: String,
+    val body: String = "",
 )
 
 class ServerViewModel(application: Application) : AndroidViewModel(application) {
@@ -57,6 +77,7 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
     }
 
     private val recentStore = RecentConnectionsStore(application)
+    private val identityStore = IdentityStore(application)
 
     // ChannelViewModel 引用（由 NavGraph 设置）
     var channelViewModel: ChannelViewModel? = null
@@ -88,6 +109,12 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
     private val _serverInfo = MutableStateFlow<ServerInfo?>(null)
     val serverInfo: StateFlow<ServerInfo?> = _serverInfo.asStateFlow()
 
+    // ── 更新检测 ──
+    private val updatePreferences = UpdatePreferences(application)
+
+    private val _updateCheckResult = MutableStateFlow<com.tsmobile.app.ui.components.UpdateCheckResult?>(null)
+    val updateCheckResult: StateFlow<com.tsmobile.app.ui.components.UpdateCheckResult?> = _updateCheckResult.asStateFlow()
+
     // ── 主题切换（架构 4.4） ──
     private val themePreferences = ThemePreferences(application)
 
@@ -127,6 +154,177 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
         val defaultChannelPassword: String = "",
     )
 
+    init {
+        // 启动时自动检查更新
+        checkForUpdate()
+    }
+
+    // --- 更新检测 ---
+
+    /**
+     * 检查 GitHub/Gitea 是否有新版本。
+     * 用 semver 方式比较版本号，每次启动最多检查一次（1小时去重）。
+     */
+    fun checkForUpdate() {
+        if (_state.value.isCheckingUpdate) {
+            android.util.Log.d(TAG, "Update check: already in progress, skipping")
+            return
+        }
+        android.util.Log.d(TAG, "Update check: starting...")
+        _state.update { it.copy(isCheckingUpdate = true) }
+
+        viewModelScope.launch {
+            try {
+                // 去重：1小时内不重复检查
+                val lastCheckTime = updatePreferences.lastCheckTimestamp.first()
+                val oneHourMs = 60 * 60 * 1000L
+                val elapsed = System.currentTimeMillis() - lastCheckTime
+                if (elapsed < oneHourMs) {
+                    val waitMinutes = (oneHourMs - elapsed) / 60_000
+                    android.util.Log.d(TAG, "Update check: debounced (last check was ${elapsed / 60_000}min ago, can retry in ${waitMinutes}min)")
+                    _state.update { it.copy(isCheckingUpdate = false) }
+                    return@launch
+                }
+
+                // 获取本地版本
+                val app = getApplication<android.app.Application>()
+                @Suppress("DEPRECATION")
+                val pi = app.packageManager.getPackageInfo(app.packageName, 0)
+                val localVersion = pi.versionName ?: "0"
+                android.util.Log.d(TAG, "Update check: local version=$localVersion")
+
+                // 获取远程版本
+                val release = UpdateChecker.fetchLatestRelease()
+                updatePreferences.setLastCheckTimestamp(System.currentTimeMillis())
+
+                if (release == null) {
+                    android.util.Log.d(TAG, "Update check: no release info from server (network error or no release yet)")
+                } else if (UpdateChecker.compareVersion(release.versionName, localVersion) > 0) {
+                    android.util.Log.d(TAG, "Update check: new version available! remote=${release.versionName} > local=$localVersion")
+                    // 检查是否已被用户忽略（仅首次启动自动弹窗时检查）
+                    val dismissed = updatePreferences.dismissedVersion.first()
+                    if (release.versionName != dismissed) {
+                        android.util.Log.d(TAG, "Update check: showing update dialog for version ${release.versionName}")
+                        _updateCheckResult.value =
+                            com.tsmobile.app.ui.components.UpdateCheckResult.UpdateAvailable(
+                                UpdateInfo(
+                                    versionName = release.versionName,
+                                    releaseUrl = release.releaseUrl,
+                                    body = release.body,
+                                )
+                            )
+                    } else {
+                        android.util.Log.d(TAG, "Update check: version ${release.versionName} was previously dismissed, skipping")
+                    }
+                } else {
+                    android.util.Log.d(TAG, "Update check: no newer version (remote=${release.versionName} <= local=$localVersion)")
+                }
+                _state.update { it.copy(isCheckingUpdate = false) }
+            } catch (e: Exception) {
+                android.util.Log.w(TAG, "Update check: failed", e)
+                _state.update { it.copy(isCheckingUpdate = false) }
+            }
+        }
+    }
+
+    /**
+     * 手动检查更新（弹出对话框展示结果）。
+     * 不走去重逻辑，每次点击都会实际请求。
+     */
+    fun manualCheckUpdate() {
+        if (_updateCheckResult.value is com.tsmobile.app.ui.components.UpdateCheckResult.Checking) return
+
+        _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.Checking
+        _state.update { it.copy(isCheckingUpdate = true) }
+
+        viewModelScope.launch {
+            try {
+                // 获取本地版本
+                val app = getApplication<android.app.Application>()
+                @Suppress("DEPRECATION")
+                val pi = app.packageManager.getPackageInfo(app.packageName, 0)
+                val localVersion = pi.versionName ?: "0"
+                android.util.Log.d(TAG, "Manual update check: local version=$localVersion")
+
+                // 获取远程版本
+                val release = UpdateChecker.fetchLatestRelease()
+                updatePreferences.setLastCheckTimestamp(System.currentTimeMillis())
+
+                if (release == null) {
+                    android.util.Log.d(TAG, "Manual update check: server returned no release info")
+                    _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.Error("")
+                } else if (UpdateChecker.compareVersion(release.versionName, localVersion) > 0) {
+                    // 检查是否已被忽略
+                    val dismissed = updatePreferences.dismissedVersion.first()
+                    if (release.versionName != dismissed) {
+                        android.util.Log.d(TAG, "Manual update check: new version ${release.versionName} available!")
+                        _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.UpdateAvailable(
+                            UpdateInfo(
+                                versionName = release.versionName,
+                                releaseUrl = release.releaseUrl,
+                                body = release.body,
+                            )
+                        )
+                    } else {
+                        // 已被忽略但用户主动检查，也显示有新版本（覆盖忽略状态）
+                        android.util.Log.d(TAG, "Manual update check: version ${release.versionName} available (previously dismissed, showing anyway)")
+                        _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.UpdateAvailable(
+                            UpdateInfo(
+                                versionName = release.versionName,
+                                releaseUrl = release.releaseUrl,
+                                body = release.body,
+                            )
+                        )
+                    }
+                } else {
+                    android.util.Log.d(TAG, "Manual update check: already latest (remote=${release.versionName} <= local=$localVersion)")
+                    _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.NoUpdate
+                }
+            } catch (e: Exception) {
+                android.util.Log.w(TAG, "Manual update check: failed", e)
+                _updateCheckResult.value = com.tsmobile.app.ui.components.UpdateCheckResult.Error(
+                    e.localizedMessage ?: "网络连接失败"
+                )
+            }
+        }
+    }
+
+    /**
+     * 关闭更新检查弹窗。
+     */
+    fun closeUpdateDialog() {
+        _updateCheckResult.value = null
+        _state.update { it.copy(isCheckingUpdate = false) }
+    }
+
+    /**
+     * 在浏览器中打开发布页面。
+     */
+    fun openReleaseUrl(url: String) {
+        try {
+            val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url)).apply {
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
+            getApplication<android.app.Application>().startActivity(intent)
+        } catch (e: Exception) {
+            android.util.Log.w(TAG, "Failed to open release URL", e)
+        }
+    }
+
+    /**
+     * 忽略当前版本的更新提示（持久化，同版本不再提示）。
+     */
+    fun dismissUpdate() {
+        val dialogResult = _updateCheckResult.value
+        if (dialogResult is com.tsmobile.app.ui.components.UpdateCheckResult.UpdateAvailable) {
+            viewModelScope.launch {
+                updatePreferences.setDismissedVersion(dialogResult.info.versionName)
+            }
+            _updateCheckResult.value = null
+            _state.update { it.copy(isCheckingUpdate = false) }
+        }
+    }
+
     // --- 输入更新 ---
 
     fun updateAddress(value: String) {
@@ -200,11 +398,27 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
 
         // 异步连接（阻塞调用放到 IO 线程，不阻塞 UI）
         viewModelScope.launch {
+            val identity = withContext(Dispatchers.IO) {
+                identityStore.getOrCreate { Teamspeak.generateIdentity(8) }
+            }
+            if (identity.isBlank()) {
+                _state.update {
+                    it.copy(
+                        connectState = ConnectState.FAILED,
+                        errorMessage = "身份生成失败",
+                    )
+                }
+                return@launch
+            }
+
             val result = withContext(Dispatchers.IO) {
-                TSBridge.connect(
+                TSBridge.connectWithIdentity(
+                    identity = identity,
                     host = config.address,
                     nickname = config.nickname,
                     password = config.password,
+                    defaultChannel = config.defaultChannel,
+                    defaultChannelPassword = config.defaultChannelPassword,
                     callbacks = createBridgeCallbacks(),
                 )
             }
@@ -337,7 +551,13 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
         // 震动反馈
         triggerVibration()
 
-        // 自动隐藏通知（5秒后）
+        // app 在后台时发送系统通知
+        val isInForeground = ProcessLifecycleOwner.get().lifecycle.currentState == Lifecycle.State.RESUMED
+        if (!isInForeground) {
+            sendPokeSystemNotification(event)
+        }
+
+        // 自动隐藏 app 内气泡（5秒后）
         viewModelScope.launch {
             delay(5000)
             dismissPokeNotification()
@@ -349,6 +569,91 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
         _pokeNotification.value = null
     }
 
+    private var pokeNotificationId = 1000
+
+    /**
+     * 发送 Poke 系统通知（app 在后台时调用）。
+     */
+    private fun sendPokeSystemNotification(event: com.tsmobile.app.data.PokeEvent) {
+        try {
+            val context = getApplication<Application>()
+
+            val pendingIntent = PendingIntent.getActivity(
+                context,
+                0,
+                Intent(context, MainActivity::class.java).apply {
+                    flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                },
+                PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT,
+            )
+
+            val text = if (event.message.isNotEmpty()) {
+                "${event.invokerName} 戳了你一下：${event.message}"
+            } else {
+                "${event.invokerName} 戳了你一下"
+            }
+
+            val notification = NotificationCompat.Builder(context, App.POKE_CHANNEL_ID)
+                .setSmallIcon(android.R.drawable.ic_dialog_info)
+                .setContentTitle("TeamSpeak Poke")
+                .setContentText(text)
+                .setPriority(NotificationCompat.PRIORITY_HIGH)
+                .setAutoCancel(true)
+                .setContentIntent(pendingIntent)
+                .build()
+
+            val nm = context.getSystemService(NotificationManager::class.java)
+            nm.notify(pokeNotificationId++, notification)
+        } catch (e: Exception) {
+            android.util.Log.e(TAG, "Failed to send poke notification", e)
+        }
+    }
+
+    /**
+     * 发送消息系统通知。
+     * 仅在 app 前台且正在查看对应聊天页时跳过，其余情况均推送。
+     */
+    private fun sendMessageNotification(targetMode: Int, targetId: Long, senderName: String, content: String) {
+        val activeKey = Repository.activeChatKey
+        val msgKey = "${targetMode}_${targetId}"
+        val isInForeground = ProcessLifecycleOwner.get().lifecycle.currentState == Lifecycle.State.RESUMED
+
+        // app 在前台且正在查看该会话 → 跳过（消息已直接显示在 UI 中）
+        if (isInForeground && activeKey == msgKey) return
+
+        try {
+            val context = getApplication<Application>()
+
+            val pendingIntent = PendingIntent.getActivity(
+                context,
+                0,
+                Intent(context, MainActivity::class.java).apply {
+                    flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                },
+                PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT,
+            )
+
+            val title = if (targetMode == 2) "频道消息" else "私聊消息"
+            val text = "$senderName: $content"
+
+            val notification = NotificationCompat.Builder(context, App.POKE_CHANNEL_ID)
+                .setSmallIcon(android.R.drawable.ic_dialog_info)
+                .setContentTitle(title)
+                .setContentText(text)
+                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+                .setAutoCancel(true)
+                .setContentIntent(pendingIntent)
+                .build()
+
+            // 使用 targetMode_targetId 作为通知 ID，不同会话各自覆盖
+            val notificationId = 2000 + (msgKey.hashCode() and 0xFFFF)
+            val nm = context.getSystemService(NotificationManager::class.java)
+            nm.notify(notificationId, notification)
+        } catch (e: Exception) {
+            android.util.Log.e(TAG, "Failed to send message notification", e)
+        }
+    }
+
     private fun triggerVibration() {
         try {
             val vibrator = getApplication<Application>().getSystemService(android.os.Vibrator::class.java)
@@ -466,7 +771,10 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
 
                 val params = lastConnectParams ?: break
                 val error = withContext(Dispatchers.IO) {
-                    TSBridge.connect(
+                    val identity = identityStore.getOrCreate { Teamspeak.generateIdentity(8) }
+                    if (identity.isBlank()) return@withContext "身份生成失败"
+                    TSBridge.connectWithIdentity(
+                        identity = identity,
                         host = params.host,
                         nickname = params.nickname,
                         password = params.password,
@@ -508,7 +816,10 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
 
         viewModelScope.launch {
             val error = withContext(Dispatchers.IO) {
-                TSBridge.connect(
+                val identity = identityStore.getOrCreate { Teamspeak.generateIdentity(8) }
+                if (identity.isBlank()) return@withContext "身份生成失败"
+                TSBridge.connectWithIdentity(
+                    identity = identity,
                     host = params.host,
                     nickname = params.nickname,
                     password = params.password,
@@ -666,13 +977,17 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
                     targetIdLong = resolved
                 }
             }
-            // TextMsg 不含 invokerID，通过 UID 查找客户端 ID
+            // 直接使用 Go 侧传来的 invokerID（AAR 已包含此字段）
             val selfId = Repository.selfClientId.value
-            val selfUid = Repository.clients.value.find { it.id == selfId }?.uid
-            val senderClient = Repository.clients.value.find { it.uid == msg.invokerUID }
-            // 优先匹配客户端列表；如果 UID 是自己的，直接使用 selfId
-            val senderId = senderClient?.id ?: if (msg.invokerUID == selfUid) selfId else 0
-            android.util.Log.d(TAG, "onTextMessage: resolved senderId=$senderId (selfId=$selfId, selfUid=$selfUid, senderClient=${senderClient?.id})")
+            val invokerId = msg.invokerID.toInt()
+            val senderId: Int = if (invokerId > 0) invokerId else {
+                // 降级：invokerID 不可用时通过 UID 反查
+                val selfUid = Repository.getClient(selfId)?.uid
+                val senderClient = Repository.getClientByUid(msg.invokerUID)
+                senderClient?.id ?: if (msg.invokerUID == selfUid) selfId else 0
+            }
+            val isSelf = senderId == selfId
+            android.util.Log.d(TAG, "onTextMessage: senderId=$senderId (invokerID=${msg.invokerID}, isSelf=$isSelf)")
             val cvm = chatViewModel
             if (cvm == null) {
                 android.util.Log.w(TAG, "onTextMessage: chatViewModel is null, message dropped!")
@@ -685,10 +1000,12 @@ class ServerViewModel(application: Application) : AndroidViewModel(application)
                     content = msg.message
                 )
             }
-            // 更新未读标记
-            channelViewModel?.onTextMessage(
+            // 当用户不在对应聊天页时，推送系统通知
+            sendMessageNotification(
                 targetMode = msg.targetMode.toInt(),
-                targetId = targetIdLong.toString(),
+                targetId = targetIdLong,
+                senderName = msg.invokerName,
+                content = msg.message,
             )
         }
 

android/app/src/main/java/com/tsmobile/app/viewmodel/VoiceViewModel.kt

@@ -72,6 +72,9 @@ class VoiceViewModel(application: Application) : AndroidViewModel(application) {
     private val _speakingClients = MutableStateFlow<Map<Int, Long>>(emptyMap())
     val speakingClients: StateFlow<Map<Int, Long>> = _speakingClients
 
+    /** 保护 _speakingClients 和 _remoteAudioSettings 的复合读写操作 */
+    private val audioStateLock = Any()
+
     init {
         // 连接 VoiceService 回调到 TSBridge
         voiceService.onVoiceData = { opusData, codec ->
@@ -225,35 +228,46 @@ class VoiceViewModel(application: Application) : AndroidViewModel(application) {
     /** Go owns speaking detection; Kotlin only reflects explicit bridge transitions. */
     fun handleClientSpeaking(clientID: Long, speaking: Boolean) {
         val clientId = clientID.toInt()
-        val current = _speakingClients.value.toMutableMap()
-        if (speaking) current[clientId] = System.currentTimeMillis() else current.remove(clientId)
-        _speakingClients.value = current
+        synchronized(audioStateLock) {
+            val current = _speakingClients.value.toMutableMap()
+            if (speaking) current[clientId] = System.currentTimeMillis() else current.remove(clientId)
+            _speakingClients.value = current
+        }
     }
 
     /** Removes Go's timeline and local transient mute/speaking state for this client. */
     fun removeRemoteClient(clientID: Long, moved: Boolean = false) {
         val clientId = clientID.toInt()
         TSBridge.removeRemoteAudioClient(clientId)
-        _remoteAudioSettings.value = _remoteAudioSettings.value - clientId
-        _speakingClients.value = _speakingClients.value - clientId
+        synchronized(audioStateLock) {
+            _remoteAudioSettings.value = _remoteAudioSettings.value - clientId
+            _speakingClients.value = _speakingClients.value - clientId
+        }
     }
 
     fun setRemoteClientMuted(clientId: Int, muted: Boolean) {
-        _remoteAudioSettings.value = _remoteAudioSettings.value + (clientId to RemoteAudioSettings(muted))
+        synchronized(audioStateLock) {
+            _remoteAudioSettings.value = _remoteAudioSettings.value + (clientId to RemoteAudioSettings(muted))
+        }
         TSBridge.setRemoteClientMuted(clientId, muted)
     }
 
     fun toggleRemoteClientMuted(clientId: Int) {
-        val muted = !(_remoteAudioSettings.value[clientId]?.muted ?: false)
-        setRemoteClientMuted(clientId, muted)
+        synchronized(audioStateLock) {
+            val muted = !(_remoteAudioSettings.value[clientId]?.muted ?: false)
+            _remoteAudioSettings.value = _remoteAudioSettings.value + (clientId to RemoteAudioSettings(muted))
+            TSBridge.setRemoteClientMuted(clientId, muted)
+        }
     }
 
     fun onClientMoved(clientId: Long, targetChannelId: String) {
         val id = clientId.toInt()
         if (id == Repository.selfClientId.value) {
             TSBridge.clearRemoteAudioClients()
-            _remoteAudioSettings.value = emptyMap()
-            _speakingClients.value = emptyMap()
+            synchronized(audioStateLock) {
+                _remoteAudioSettings.value = emptyMap()
+                _speakingClients.value = emptyMap()
+            }
         } else if (targetChannelId != Repository.currentChannelId.value) {
             removeRemoteClient(clientId, moved = true)
         }