diff --git a/android/CHANGELOG.md b/android/CHANGELOG.md
index 00c06ac..e119724 100644
--- a/android/CHANGELOG.md
+++ b/android/CHANGELOG.md
@@ -108,3 +108,12 @@
 ### Step 17 - Sprint B / media tests
 - Added `NetworkMediaRepositoryTest` for successful upload+attach flow.
 - Added error-path coverage for failed presigned upload handling.
+
+## 2026-03-09
+### Step 18 - Sprint P0 / 1) Message core completion
+- Extended message API/data contracts with `messages/status`, `forward`, and reaction endpoints.
+- Added message domain support for forwarded message metadata and attachment waveform payload.
+- Implemented repository operations for delivery/read acknowledgements, forward, and reactions.
+- Updated Chat ViewModel/UI with forward flow, reaction toggle, and edit/delete-for-all edge-case guards.
+- Added automatic delivered/read acknowledgement for latest incoming message in active chat.
+- Fixed outgoing message detection by resolving current user id from JWT `sub` claim.
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/db/MessengerDatabase.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/db/MessengerDatabase.kt
index 760cfe2..4462dc0 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/db/MessengerDatabase.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/db/MessengerDatabase.kt
@@ -16,7 +16,7 @@ import ru.daemonlord.messenger.data.message.local.entity.MessageEntity
         MessageEntity::class,
         MessageAttachmentEntity::class,
     ],
-    version = 2,
+    version = 3,
     exportSchema = false,
 )
 abstract class MessengerDatabase : RoomDatabase() {
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/message/api/MessageApiService.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/message/api/MessageApiService.kt
index 95ff57d..68c7c3f 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/message/api/MessageApiService.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/message/api/MessageApiService.kt
@@ -8,7 +8,11 @@ import retrofit2.http.PUT
 import retrofit2.http.Path
 import retrofit2.http.Query
 import ru.daemonlord.messenger.data.message.dto.MessageCreateRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageForwardRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageReadDto
+import ru.daemonlord.messenger.data.message.dto.MessageReactionDto
+import ru.daemonlord.messenger.data.message.dto.MessageReactionToggleRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageStatusUpdateRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageUpdateRequestDto
 
 interface MessageApiService {
@@ -35,4 +39,26 @@ interface MessageApiService {
         @Path("message_id") messageId: Long,
         @Query("for_all") forAll: Boolean = false,
     )
+
+    @POST("/api/v1/messages/status")
+    suspend fun updateMessageStatus(
+        @Body request: MessageStatusUpdateRequestDto,
+    )
+
+    @POST("/api/v1/messages/{message_id}/forward")
+    suspend fun forwardMessage(
+        @Path("message_id") messageId: Long,
+        @Body request: MessageForwardRequestDto,
+    ): MessageReadDto
+
+    @GET("/api/v1/messages/{message_id}/reactions")
+    suspend fun listReactions(
+        @Path("message_id") messageId: Long,
+    ): List<MessageReactionDto>
+
+    @POST("/api/v1/messages/{message_id}/reactions/toggle")
+    suspend fun toggleReaction(
+        @Path("message_id") messageId: Long,
+        @Body request: MessageReactionToggleRequestDto,
+    ): List<MessageReactionDto>
 }
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/message/dto/MessageDtos.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/message/dto/MessageDtos.kt
index 0cd4959..a0ae6c2 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/message/dto/MessageDtos.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/message/dto/MessageDtos.kt
@@ -12,10 +12,14 @@ data class MessageReadDto(
     val senderId: Long,
     @SerialName("reply_to_message_id")
     val replyToMessageId: Long? = null,
+    @SerialName("forwarded_from_message_id")
+    val forwardedFromMessageId: Long? = null,
     val type: String,
     val text: String? = null,
     @SerialName("delivery_status")
     val deliveryStatus: String? = null,
+    @SerialName("attachment_waveform")
+    val attachmentWaveform: List<Int>? = null,
     @SerialName("created_at")
     val createdAt: String,
     @SerialName("updated_at")
@@ -38,3 +42,32 @@ data class MessageCreateRequestDto(
 data class MessageUpdateRequestDto(
     val text: String,
 )
+
+@Serializable
+data class MessageStatusUpdateRequestDto(
+    @SerialName("chat_id")
+    val chatId: Long,
+    @SerialName("message_id")
+    val messageId: Long,
+    val status: String,
+)
+
+@Serializable
+data class MessageForwardRequestDto(
+    @SerialName("target_chat_id")
+    val targetChatId: Long,
+    @SerialName("include_author")
+    val includeAuthor: Boolean = true,
+)
+
+@Serializable
+data class MessageReactionDto(
+    val emoji: String,
+    val count: Int,
+    val reacted: Boolean = false,
+)
+
+@Serializable
+data class MessageReactionToggleRequestDto(
+    val emoji: String,
+)
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/message/local/entity/MessageEntity.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/message/local/entity/MessageEntity.kt
index 1115293..1b93594 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/message/local/entity/MessageEntity.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/message/local/entity/MessageEntity.kt
@@ -29,12 +29,16 @@ data class MessageEntity(
     val senderAvatarUrl: String?,
     @ColumnInfo(name = "reply_to_message_id")
     val replyToMessageId: Long?,
+    @ColumnInfo(name = "forwarded_from_message_id")
+    val forwardedFromMessageId: Long?,
     @ColumnInfo(name = "type")
     val type: String,
     @ColumnInfo(name = "text")
     val text: String?,
     @ColumnInfo(name = "status")
     val status: String?,
+    @ColumnInfo(name = "attachment_waveform_json")
+    val attachmentWaveformJson: String?,
     @ColumnInfo(name = "created_at")
     val createdAt: String,
     @ColumnInfo(name = "updated_at")
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/message/mapper/MessageMappers.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/message/mapper/MessageMappers.kt
index 1437c58..87350b2 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/message/mapper/MessageMappers.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/message/mapper/MessageMappers.kt
@@ -1,9 +1,14 @@
 package ru.daemonlord.messenger.data.message.mapper
 
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
 import ru.daemonlord.messenger.data.message.dto.MessageReadDto
 import ru.daemonlord.messenger.data.message.local.entity.MessageEntity
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
 import ru.daemonlord.messenger.domain.message.model.MessageItem
 
+private val mapperJson = Json { ignoreUnknownKeys = true }
+
 fun MessageReadDto.toEntity(): MessageEntity {
     return MessageEntity(
         id = id,
@@ -13,9 +18,11 @@ fun MessageReadDto.toEntity(): MessageEntity {
         senderUsername = null,
         senderAvatarUrl = null,
         replyToMessageId = replyToMessageId,
+        forwardedFromMessageId = forwardedFromMessageId,
         type = type,
         text = text,
         status = deliveryStatus,
+        attachmentWaveformJson = attachmentWaveform?.let { mapperJson.encodeToString(it) },
         createdAt = createdAt,
         updatedAt = updatedAt,
     )
@@ -34,5 +41,20 @@ fun MessageEntity.toDomain(currentUserId: Long?): MessageItem {
         isOutgoing = currentUserId != null && currentUserId == senderId,
         status = status,
         replyToMessageId = replyToMessageId,
+        forwardedFromMessageId = forwardedFromMessageId,
+        attachmentWaveform = attachmentWaveformJson.toWaveformOrNull(),
     )
 }
+
+fun ru.daemonlord.messenger.data.message.dto.MessageReactionDto.toDomain(): MessageReaction {
+    return MessageReaction(
+        emoji = emoji,
+        count = count,
+        reacted = reacted,
+    )
+}
+
+private fun String?.toWaveformOrNull(): List<Int>? {
+    if (this.isNullOrBlank()) return null
+    return runCatching { mapperJson.decodeFromString<List<Int>>(this) }.getOrNull()
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepository.kt b/android/app/src/main/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepository.kt
index 7014c1e..1fc7af2 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepository.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepository.kt
@@ -1,10 +1,17 @@
 package ru.daemonlord.messenger.data.message.repository
 
 import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.launch
 import retrofit2.HttpException
 import ru.daemonlord.messenger.data.chat.local.dao.ChatDao
 import ru.daemonlord.messenger.data.message.api.MessageApiService
+import ru.daemonlord.messenger.core.token.TokenRepository
 import ru.daemonlord.messenger.data.message.local.dao.MessageDao
 import ru.daemonlord.messenger.data.message.local.entity.MessageEntity
 import ru.daemonlord.messenger.data.message.mapper.toDomain
@@ -14,15 +21,22 @@ import ru.daemonlord.messenger.domain.common.AppError
 import ru.daemonlord.messenger.domain.common.AppResult
 import ru.daemonlord.messenger.domain.media.repository.MediaRepository
 import ru.daemonlord.messenger.domain.message.model.MessageItem
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
 import ru.daemonlord.messenger.domain.message.repository.MessageRepository
 import ru.daemonlord.messenger.data.message.dto.MessageCreateRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageForwardRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageReactionToggleRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageStatusUpdateRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageUpdateRequestDto
 import java.io.IOException
+import java.util.Base64
 import java.util.UUID
 import javax.inject.Inject
 import javax.inject.Singleton
-import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
 
 @Singleton
 class NetworkMessageRepository @Inject constructor(
@@ -30,10 +44,21 @@ class NetworkMessageRepository @Inject constructor(
     private val messageDao: MessageDao,
     private val chatDao: ChatDao,
     private val mediaRepository: MediaRepository,
+    tokenRepository: TokenRepository,
     @IoDispatcher private val ioDispatcher: CoroutineDispatcher,
 ) : MessageRepository {
 
-    private val currentUserId: Long? = null
+    @Volatile
+    private var currentUserId: Long? = null
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+    init {
+        scope.launch {
+            tokenRepository.observeTokens().collectLatest { tokens ->
+                currentUserId = tokens?.accessToken?.extractUserIdFromJwt()
+            }
+        }
+    }
 
     override fun observeMessages(chatId: Long): Flow<List<MessageItem>> {
         return messageDao.observeRecentMessages(chatId = chatId).map { entities ->
@@ -85,9 +110,11 @@ class NetworkMessageRepository @Inject constructor(
             senderUsername = null,
             senderAvatarUrl = null,
             replyToMessageId = replyToMessageId,
+            forwardedFromMessageId = null,
             type = "text",
             text = text,
             status = "pending",
+            attachmentWaveformJson = null,
             createdAt = java.time.Instant.now().toString(),
             updatedAt = null,
         )
@@ -169,9 +196,11 @@ class NetworkMessageRepository @Inject constructor(
             senderUsername = null,
             senderAvatarUrl = null,
             replyToMessageId = replyToMessageId,
+            forwardedFromMessageId = null,
             type = messageType,
             text = caption,
             status = "pending",
+            attachmentWaveformJson = null,
             createdAt = java.time.Instant.now().toString(),
             updatedAt = null,
         )
@@ -224,6 +253,84 @@ class NetworkMessageRepository @Inject constructor(
         }
     }
 
+    override suspend fun markMessageDelivered(chatId: Long, messageId: Long): AppResult<Unit> = withContext(ioDispatcher) {
+        try {
+            messageApiService.updateMessageStatus(
+                request = MessageStatusUpdateRequestDto(
+                    chatId = chatId,
+                    messageId = messageId,
+                    status = "message_delivered",
+                )
+            )
+            AppResult.Success(Unit)
+        } catch (error: Throwable) {
+            AppResult.Error(error.toAppError())
+        }
+    }
+
+    override suspend fun markMessageRead(chatId: Long, messageId: Long): AppResult<Unit> = withContext(ioDispatcher) {
+        try {
+            messageApiService.updateMessageStatus(
+                request = MessageStatusUpdateRequestDto(
+                    chatId = chatId,
+                    messageId = messageId,
+                    status = "message_read",
+                )
+            )
+            AppResult.Success(Unit)
+        } catch (error: Throwable) {
+            AppResult.Error(error.toAppError())
+        }
+    }
+
+    override suspend fun forwardMessage(
+        messageId: Long,
+        targetChatId: Long,
+        includeAuthor: Boolean,
+    ): AppResult<Unit> = withContext(ioDispatcher) {
+        try {
+            val forwarded = messageApiService.forwardMessage(
+                messageId = messageId,
+                request = MessageForwardRequestDto(
+                    targetChatId = targetChatId,
+                    includeAuthor = includeAuthor,
+                ),
+            )
+            messageDao.upsertMessages(listOf(forwarded.toEntity()))
+            chatDao.updateLastMessage(
+                chatId = targetChatId,
+                lastMessageText = forwarded.text,
+                lastMessageType = forwarded.type,
+                lastMessageCreatedAt = forwarded.createdAt,
+                updatedSortAt = forwarded.createdAt,
+            )
+            AppResult.Success(Unit)
+        } catch (error: Throwable) {
+            AppResult.Error(error.toAppError())
+        }
+    }
+
+    override suspend fun listReactions(messageId: Long): AppResult<List<MessageReaction>> = withContext(ioDispatcher) {
+        try {
+            val reactions = messageApiService.listReactions(messageId = messageId).map { it.toDomain() }
+            AppResult.Success(reactions)
+        } catch (error: Throwable) {
+            AppResult.Error(error.toAppError())
+        }
+    }
+
+    override suspend fun toggleReaction(messageId: Long, emoji: String): AppResult<List<MessageReaction>> = withContext(ioDispatcher) {
+        try {
+            val reactions = messageApiService.toggleReaction(
+                messageId = messageId,
+                request = MessageReactionToggleRequestDto(emoji = emoji),
+            ).map { it.toDomain() }
+            AppResult.Success(reactions)
+        } catch (error: Throwable) {
+            AppResult.Error(error.toAppError())
+        }
+    }
+
     private fun mapMimeToMessageType(mimeType: String): String {
         return when {
             mimeType.startsWith("image/") -> "image"
@@ -244,4 +351,24 @@ class NetworkMessageRepository @Inject constructor(
             else -> AppError.Unknown(cause = this)
         }
     }
+
+    private fun String.extractUserIdFromJwt(): Long? {
+        val payloadPart = split('.').getOrNull(1) ?: return null
+        val normalized = payloadPart
+            .replace('-', '+')
+            .replace('_', '/')
+            .let { part ->
+                when (part.length % 4) {
+                    2 -> "$part=="
+                    3 -> "$part="
+                    else -> part
+                }
+            }
+        val payloadJson = runCatching {
+            String(Base64.getDecoder().decode(normalized), Charsets.UTF_8)
+        }.getOrNull() ?: return null
+        return runCatching {
+            Json.parseToJsonElement(payloadJson).jsonObject["sub"]?.jsonPrimitive?.content?.toLongOrNull()
+        }.getOrNull()
+    }
 }
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageItem.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageItem.kt
index 4ed9ed7..d3fbb60 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageItem.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageItem.kt
@@ -12,4 +12,6 @@ data class MessageItem(
     val isOutgoing: Boolean,
     val status: String?,
     val replyToMessageId: Long?,
+    val forwardedFromMessageId: Long?,
+    val attachmentWaveform: List<Int>?,
 )
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageReaction.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageReaction.kt
new file mode 100644
index 0000000..822ebe0
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/model/MessageReaction.kt
@@ -0,0 +1,7 @@
+package ru.daemonlord.messenger.domain.message.model
+
+data class MessageReaction(
+    val emoji: String,
+    val count: Int,
+    val reacted: Boolean,
+)
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/repository/MessageRepository.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/repository/MessageRepository.kt
index 0e9ef0a..98348a7 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/repository/MessageRepository.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/repository/MessageRepository.kt
@@ -3,6 +3,7 @@ package ru.daemonlord.messenger.domain.message.repository
 import kotlinx.coroutines.flow.Flow
 import ru.daemonlord.messenger.domain.common.AppResult
 import ru.daemonlord.messenger.domain.message.model.MessageItem
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
 
 interface MessageRepository {
     fun observeMessages(chatId: Long): Flow<List<MessageItem>>
@@ -19,4 +20,9 @@ interface MessageRepository {
     ): AppResult<Unit>
     suspend fun editMessage(messageId: Long, newText: String): AppResult<Unit>
     suspend fun deleteMessage(messageId: Long, forAll: Boolean): AppResult<Unit>
+    suspend fun markMessageDelivered(chatId: Long, messageId: Long): AppResult<Unit>
+    suspend fun markMessageRead(chatId: Long, messageId: Long): AppResult<Unit>
+    suspend fun forwardMessage(messageId: Long, targetChatId: Long, includeAuthor: Boolean = true): AppResult<Unit>
+    suspend fun listReactions(messageId: Long): AppResult<List<MessageReaction>>
+    suspend fun toggleReaction(messageId: Long, emoji: String): AppResult<List<MessageReaction>>
 }
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ForwardMessageUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ForwardMessageUseCase.kt
new file mode 100644
index 0000000..1b25c09
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ForwardMessageUseCase.kt
@@ -0,0 +1,17 @@
+package ru.daemonlord.messenger.domain.message.usecase
+
+import ru.daemonlord.messenger.domain.common.AppResult
+import ru.daemonlord.messenger.domain.message.repository.MessageRepository
+import javax.inject.Inject
+
+class ForwardMessageUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(messageId: Long, targetChatId: Long, includeAuthor: Boolean = true): AppResult<Unit> {
+        return repository.forwardMessage(
+            messageId = messageId,
+            targetChatId = targetChatId,
+            includeAuthor = includeAuthor,
+        )
+    }
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ListMessageReactionsUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ListMessageReactionsUseCase.kt
new file mode 100644
index 0000000..2d18646
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ListMessageReactionsUseCase.kt
@@ -0,0 +1,14 @@
+package ru.daemonlord.messenger.domain.message.usecase
+
+import ru.daemonlord.messenger.domain.common.AppResult
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
+import ru.daemonlord.messenger.domain.message.repository.MessageRepository
+import javax.inject.Inject
+
+class ListMessageReactionsUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(messageId: Long): AppResult<List<MessageReaction>> {
+        return repository.listReactions(messageId = messageId)
+    }
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageDeliveredUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageDeliveredUseCase.kt
new file mode 100644
index 0000000..fdfe145
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageDeliveredUseCase.kt
@@ -0,0 +1,13 @@
+package ru.daemonlord.messenger.domain.message.usecase
+
+import ru.daemonlord.messenger.domain.common.AppResult
+import ru.daemonlord.messenger.domain.message.repository.MessageRepository
+import javax.inject.Inject
+
+class MarkMessageDeliveredUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(chatId: Long, messageId: Long): AppResult<Unit> {
+        return repository.markMessageDelivered(chatId = chatId, messageId = messageId)
+    }
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageReadUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageReadUseCase.kt
new file mode 100644
index 0000000..d52526e
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/MarkMessageReadUseCase.kt
@@ -0,0 +1,13 @@
+package ru.daemonlord.messenger.domain.message.usecase
+
+import ru.daemonlord.messenger.domain.common.AppResult
+import ru.daemonlord.messenger.domain.message.repository.MessageRepository
+import javax.inject.Inject
+
+class MarkMessageReadUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(chatId: Long, messageId: Long): AppResult<Unit> {
+        return repository.markMessageRead(chatId = chatId, messageId = messageId)
+    }
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ToggleMessageReactionUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ToggleMessageReactionUseCase.kt
new file mode 100644
index 0000000..c0b1dc3
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ToggleMessageReactionUseCase.kt
@@ -0,0 +1,14 @@
+package ru.daemonlord.messenger.domain.message.usecase
+
+import ru.daemonlord.messenger.domain.common.AppResult
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
+import ru.daemonlord.messenger.domain.message.repository.MessageRepository
+import javax.inject.Inject
+
+class ToggleMessageReactionUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(messageId: Long, emoji: String): AppResult<List<MessageReaction>> {
+        return repository.toggleReaction(messageId = messageId, emoji = emoji)
+    }
+}
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/domain/realtime/usecase/HandleRealtimeEventsUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/realtime/usecase/HandleRealtimeEventsUseCase.kt
index 09db8aa..cf39262 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/domain/realtime/usecase/HandleRealtimeEventsUseCase.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/realtime/usecase/HandleRealtimeEventsUseCase.kt
@@ -43,9 +43,11 @@ class HandleRealtimeEventsUseCase @Inject constructor(
                                     senderUsername = null,
                                     senderAvatarUrl = null,
                                     replyToMessageId = event.replyToMessageId,
+                                    forwardedFromMessageId = null,
                                     type = event.type ?: "text",
                                     text = event.text,
                                     status = null,
+                                    attachmentWaveformJson = null,
                                     createdAt = event.createdAt ?: java.time.Instant.now().toString(),
                                     updatedAt = null,
                                 )
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt
index f2ab562..1b5297e 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt
@@ -60,6 +60,10 @@ fun ChatRoute(
         onReplySelected = viewModel::onReplySelected,
         onEditSelected = viewModel::onEditSelected,
         onDeleteSelected = viewModel::onDeleteSelected,
+        onForwardSelected = viewModel::onForwardSelected,
+        onForwardDismiss = viewModel::onForwardDismiss,
+        onForwardTargetSelected = viewModel::onForwardTargetSelected,
+        onToggleReaction = viewModel::onToggleReaction,
         onCancelComposeAction = viewModel::onCancelComposeAction,
         onLoadMore = viewModel::loadMore,
         onPickMedia = { pickMediaLauncher.launch("*/*") },
@@ -76,6 +80,10 @@ fun ChatScreen(
     onReplySelected: (MessageItem) -> Unit,
     onEditSelected: (MessageItem) -> Unit,
     onDeleteSelected: (Boolean) -> Unit,
+    onForwardSelected: () -> Unit,
+    onForwardDismiss: () -> Unit,
+    onForwardTargetSelected: (Long) -> Unit,
+    onToggleReaction: (String) -> Unit,
     onCancelComposeAction: () -> Unit,
     onLoadMore: () -> Unit,
     onPickMedia: () -> Unit,
@@ -120,6 +128,7 @@ fun ChatScreen(
                         MessageBubble(
                             message = message,
                             isSelected = state.selectedMessage?.id == message.id,
+                            reactions = state.reactionByMessageId[message.id].orEmpty(),
                             onLongPress = { onSelectMessage(message) },
                         )
                     }
@@ -135,12 +144,52 @@ fun ChatScreen(
                 horizontalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 Button(onClick = { onReplySelected(state.selectedMessage) }) { Text("Reply") }
-                Button(onClick = { onEditSelected(state.selectedMessage) }) { Text("Edit") }
+                Button(
+                    onClick = { onEditSelected(state.selectedMessage) },
+                    enabled = state.selectedCanEdit,
+                ) { Text("Edit") }
                 Button(onClick = { onDeleteSelected(false) }) { Text("Delete") }
+                Button(
+                    onClick = { onDeleteSelected(true) },
+                    enabled = state.selectedCanDeleteForAll,
+                ) { Text("Del for all") }
+                Button(onClick = onForwardSelected) { Text("Forward") }
+                Button(onClick = { onToggleReaction("\uD83D\uDC4D") }) { Text("\uD83D\uDC4D") }
+                Button(onClick = { onToggleReaction("\uD83D\uDE02") }) { Text("\uD83D\uDE02") }
                 Button(onClick = { onSelectMessage(null) }) { Text("Close") }
             }
         }
 
+        if (state.forwardingMessage != null) {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .background(MaterialTheme.colorScheme.secondaryContainer)
+                    .padding(horizontal = 12.dp, vertical = 8.dp),
+                verticalArrangement = Arrangement.spacedBy(6.dp),
+            ) {
+                Text(
+                    text = "Forward message #${state.forwardingMessage.id}",
+                    style = MaterialTheme.typography.labelLarge,
+                )
+                if (state.availableForwardTargets.isEmpty()) {
+                    Text("No available chats")
+                } else {
+                    state.availableForwardTargets.forEach { target ->
+                        Button(
+                            onClick = { onForwardTargetSelected(target.chatId) },
+                            enabled = !state.isForwarding,
+                        ) {
+                            Text(target.title)
+                        }
+                    }
+                }
+                Button(onClick = onForwardDismiss, enabled = !state.isForwarding) {
+                    Text(if (state.isForwarding) "Forwarding..." else "Cancel")
+                }
+            }
+        }
+
         if (state.replyToMessage != null || state.editingMessage != null) {
             val header = if (state.editingMessage != null) {
                 "Editing message #${state.editingMessage.id}"
@@ -231,6 +280,7 @@ private fun Uri.readMediaPayload(context: Context): PickedMediaPayload? {
 private fun MessageBubble(
     message: MessageItem,
     isSelected: Boolean,
+    reactions: List<ru.daemonlord.messenger.domain.message.model.MessageReaction>,
     onLongPress: () -> Unit,
 ) {
     val isOutgoing = message.isOutgoing
@@ -264,11 +314,33 @@ private fun MessageBubble(
                 text = message.text ?: "[${message.type}]",
                 style = MaterialTheme.typography.bodyMedium,
             )
+            if (message.forwardedFromMessageId != null) {
+                Text(
+                    text = "Forwarded from #${message.forwardedFromMessageId}",
+                    style = MaterialTheme.typography.labelSmall,
+                )
+            }
+            if (reactions.isNotEmpty()) {
+                Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                    reactions.forEach { reaction ->
+                        Text(
+                            text = "${reaction.emoji} ${reaction.count}",
+                            style = MaterialTheme.typography.labelSmall,
+                        )
+                    }
+                }
+            }
             Row(
                 modifier = Modifier.fillMaxWidth(),
                 horizontalArrangement = Arrangement.End,
             ) {
-                val status = if (message.status.isNullOrBlank()) "" else " ${message.status}"
+                val status = when (message.status) {
+                    "read" -> " \u2713\u2713"
+                    "delivered" -> " \u2713\u2713"
+                    "sent" -> " \u2713"
+                    "pending" -> " ..."
+                    else -> ""
+                }
                 Text(
                     text = "${message.id}$status",
                     style = MaterialTheme.typography.labelSmall,
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt
index 7e8936c..cba1cc9 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt
@@ -8,19 +8,28 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import ru.daemonlord.messenger.domain.chat.usecase.ObserveChatsUseCase
 import ru.daemonlord.messenger.domain.common.AppError
 import ru.daemonlord.messenger.domain.common.AppResult
 import ru.daemonlord.messenger.domain.message.model.MessageItem
 import ru.daemonlord.messenger.domain.message.usecase.DeleteMessageUseCase
 import ru.daemonlord.messenger.domain.message.usecase.EditMessageUseCase
+import ru.daemonlord.messenger.domain.message.usecase.ForwardMessageUseCase
+import ru.daemonlord.messenger.domain.message.usecase.ListMessageReactionsUseCase
 import ru.daemonlord.messenger.domain.message.usecase.LoadMoreMessagesUseCase
+import ru.daemonlord.messenger.domain.message.usecase.MarkMessageDeliveredUseCase
+import ru.daemonlord.messenger.domain.message.usecase.MarkMessageReadUseCase
 import ru.daemonlord.messenger.domain.message.usecase.ObserveMessagesUseCase
 import ru.daemonlord.messenger.domain.message.usecase.SendMediaMessageUseCase
 import ru.daemonlord.messenger.domain.message.usecase.SendTextMessageUseCase
 import ru.daemonlord.messenger.domain.message.usecase.SyncRecentMessagesUseCase
+import ru.daemonlord.messenger.domain.message.usecase.ToggleMessageReactionUseCase
 import ru.daemonlord.messenger.domain.realtime.usecase.HandleRealtimeEventsUseCase
+import java.time.Instant
+import java.time.temporal.ChronoUnit
 import javax.inject.Inject
 
 @HiltViewModel
@@ -33,12 +42,20 @@ class ChatViewModel @Inject constructor(
     private val sendMediaMessageUseCase: SendMediaMessageUseCase,
     private val editMessageUseCase: EditMessageUseCase,
     private val deleteMessageUseCase: DeleteMessageUseCase,
+    private val markMessageDeliveredUseCase: MarkMessageDeliveredUseCase,
+    private val markMessageReadUseCase: MarkMessageReadUseCase,
+    private val forwardMessageUseCase: ForwardMessageUseCase,
+    private val listMessageReactionsUseCase: ListMessageReactionsUseCase,
+    private val toggleMessageReactionUseCase: ToggleMessageReactionUseCase,
+    private val observeChatsUseCase: ObserveChatsUseCase,
     private val handleRealtimeEventsUseCase: HandleRealtimeEventsUseCase,
 ) : ViewModel() {
 
     private val chatId: Long = checkNotNull(savedStateHandle["chatId"])
     private val _uiState = MutableStateFlow(MessageUiState(chatId = chatId))
     val uiState: StateFlow<MessageUiState> = _uiState.asStateFlow()
+    private var lastDeliveredMessageId: Long? = null
+    private var lastReadMessageId: Long? = null
 
     init {
         handleRealtimeEventsUseCase.start()
@@ -51,7 +68,16 @@ class ChatViewModel @Inject constructor(
     }
 
     fun onSelectMessage(message: MessageItem?) {
-        _uiState.update { it.copy(selectedMessage = message) }
+        _uiState.update {
+            it.copy(
+                selectedMessage = message,
+                selectedCanEdit = message?.let(::canEdit) == true,
+                selectedCanDeleteForAll = message?.let(::canDeleteForAll) == true,
+            )
+        }
+        if (message != null) {
+            loadReactions(messageId = message.id)
+        }
     }
 
     fun onReplySelected(message: MessageItem) {
@@ -60,6 +86,8 @@ class ChatViewModel @Inject constructor(
                 replyToMessage = message,
                 editingMessage = null,
                 selectedMessage = null,
+                selectedCanEdit = false,
+                selectedCanDeleteForAll = false,
             )
         }
     }
@@ -70,6 +98,8 @@ class ChatViewModel @Inject constructor(
                 editingMessage = message,
                 replyToMessage = null,
                 selectedMessage = null,
+                selectedCanEdit = false,
+                selectedCanDeleteForAll = false,
                 inputText = message.text.orEmpty(),
             )
         }
@@ -80,15 +110,103 @@ class ChatViewModel @Inject constructor(
             it.copy(
                 replyToMessage = null,
                 editingMessage = null,
+                selectedMessage = null,
+                selectedCanEdit = false,
+                selectedCanDeleteForAll = false,
             )
         }
     }
 
     fun onDeleteSelected(forAll: Boolean = false) {
         val selected = uiState.value.selectedMessage ?: return
+        if (forAll && !canDeleteForAll(selected)) {
+            _uiState.update { it.copy(errorMessage = "Delete for all is available only for your own messages.") }
+            return
+        }
         viewModelScope.launch {
             when (val result = deleteMessageUseCase(selected.id, forAll = forAll)) {
-                is AppResult.Success -> _uiState.update { it.copy(selectedMessage = null) }
+                is AppResult.Success -> _uiState.update {
+                    it.copy(
+                        selectedMessage = null,
+                        selectedCanEdit = false,
+                        selectedCanDeleteForAll = false,
+                    )
+                }
+                is AppResult.Error -> _uiState.update { it.copy(errorMessage = result.reason.toUiMessage()) }
+            }
+        }
+    }
+
+    fun onForwardSelected() {
+        val message = uiState.value.selectedMessage ?: return
+        viewModelScope.launch {
+            val targets = observeChatsUseCase(archived = false)
+                .first()
+                .asSequence()
+                .filter { it.id != chatId }
+                .take(20)
+                .map { ForwardTargetUiModel(chatId = it.id, title = it.displayTitle) }
+                .toList()
+            _uiState.update {
+                it.copy(
+                    forwardingMessage = message,
+                    availableForwardTargets = targets,
+                    selectedMessage = null,
+                    selectedCanEdit = false,
+                    selectedCanDeleteForAll = false,
+                    errorMessage = null,
+                )
+            }
+        }
+    }
+
+    fun onForwardDismiss() {
+        _uiState.update {
+            it.copy(
+                forwardingMessage = null,
+                availableForwardTargets = emptyList(),
+                isForwarding = false,
+            )
+        }
+    }
+
+    fun onForwardTargetSelected(targetChatId: Long) {
+        val message = uiState.value.forwardingMessage ?: return
+        viewModelScope.launch {
+            _uiState.update { it.copy(isForwarding = true, errorMessage = null) }
+            when (val result = forwardMessageUseCase(messageId = message.id, targetChatId = targetChatId)) {
+                is AppResult.Success -> {
+                    _uiState.update {
+                        it.copy(
+                            isForwarding = false,
+                            forwardingMessage = null,
+                            availableForwardTargets = emptyList(),
+                        )
+                    }
+                }
+                is AppResult.Error -> {
+                    _uiState.update {
+                        it.copy(
+                            isForwarding = false,
+                            errorMessage = result.reason.toUiMessage(),
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    fun onToggleReaction(emoji: String) {
+        val selected = uiState.value.selectedMessage ?: return
+        viewModelScope.launch {
+            when (val result = toggleMessageReactionUseCase(messageId = selected.id, emoji = emoji)) {
+                is AppResult.Success -> {
+                    _uiState.update {
+                        it.copy(
+                            reactionByMessageId = it.reactionByMessageId + (selected.id to result.data),
+                        )
+                    }
+                }
                 is AppResult.Error -> _uiState.update { it.copy(errorMessage = result.reason.toUiMessage()) }
             }
         }
@@ -101,6 +219,15 @@ class ChatViewModel @Inject constructor(
         viewModelScope.launch {
             _uiState.update { it.copy(isSending = true, errorMessage = null) }
             val editing = uiState.value.editingMessage
+            if (editing != null && !canEdit(editing)) {
+                _uiState.update {
+                    it.copy(
+                        isSending = false,
+                        errorMessage = "This message can no longer be edited.",
+                    )
+                }
+                return@launch
+            }
             val result = if (editing != null) {
                 editMessageUseCase(messageId = editing.id, newText = text)
             } else {
@@ -198,6 +325,7 @@ class ChatViewModel @Inject constructor(
                         messages = messages.sortedBy { msg -> msg.id },
                     )
                 }
+                acknowledgeLatestIncoming(messages)
             }
         }
     }
@@ -217,6 +345,49 @@ class ChatViewModel @Inject constructor(
         }
     }
 
+    private fun loadReactions(messageId: Long) {
+        viewModelScope.launch {
+            when (val result = listMessageReactionsUseCase(messageId = messageId)) {
+                is AppResult.Success -> {
+                    _uiState.update {
+                        it.copy(reactionByMessageId = it.reactionByMessageId + (messageId to result.data))
+                    }
+                }
+                is AppResult.Error -> Unit
+            }
+        }
+    }
+
+    private fun acknowledgeLatestIncoming(messages: List<MessageItem>) {
+        val latestIncoming = messages
+            .asReversed()
+            .firstOrNull { !it.isOutgoing }
+            ?: return
+
+        if (lastDeliveredMessageId != latestIncoming.id) {
+            lastDeliveredMessageId = latestIncoming.id
+            viewModelScope.launch {
+                markMessageDeliveredUseCase(chatId = chatId, messageId = latestIncoming.id)
+            }
+        }
+        if (lastReadMessageId != latestIncoming.id) {
+            lastReadMessageId = latestIncoming.id
+            viewModelScope.launch {
+                markMessageReadUseCase(chatId = chatId, messageId = latestIncoming.id)
+            }
+        }
+    }
+
+    fun canEdit(message: MessageItem): Boolean {
+        if (!message.isOutgoing || message.type != "text") return false
+        val createdAt = runCatching { Instant.parse(message.createdAt) }.getOrNull() ?: return false
+        return createdAt.isAfter(Instant.now().minus(7, ChronoUnit.DAYS))
+    }
+
+    fun canDeleteForAll(message: MessageItem): Boolean {
+        return message.isOutgoing
+    }
+
     private fun AppError.toUiMessage(): String {
         return when (this) {
             AppError.Network -> "Network error."
diff --git a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageUiState.kt b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageUiState.kt
index 7cf5137..ec82dd1 100644
--- a/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageUiState.kt
+++ b/android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageUiState.kt
@@ -1,6 +1,7 @@
 package ru.daemonlord.messenger.ui.chat
 
 import ru.daemonlord.messenger.domain.message.model.MessageItem
+import ru.daemonlord.messenger.domain.message.model.MessageReaction
 
 data class MessageUiState(
     val chatId: Long = 0L,
@@ -14,4 +15,15 @@ data class MessageUiState(
     val replyToMessage: MessageItem? = null,
     val editingMessage: MessageItem? = null,
     val selectedMessage: MessageItem? = null,
+    val selectedCanEdit: Boolean = false,
+    val selectedCanDeleteForAll: Boolean = false,
+    val reactionByMessageId: Map<Long, List<MessageReaction>> = emptyMap(),
+    val forwardingMessage: MessageItem? = null,
+    val availableForwardTargets: List<ForwardTargetUiModel> = emptyList(),
+    val isForwarding: Boolean = false,
+)
+
+data class ForwardTargetUiModel(
+    val chatId: Long,
+    val title: String,
 )
diff --git a/android/app/src/test/java/ru/daemonlord/messenger/data/message/local/dao/MessageDaoTest.kt b/android/app/src/test/java/ru/daemonlord/messenger/data/message/local/dao/MessageDaoTest.kt
index 0ed3351..12d03d6 100644
--- a/android/app/src/test/java/ru/daemonlord/messenger/data/message/local/dao/MessageDaoTest.kt
+++ b/android/app/src/test/java/ru/daemonlord/messenger/data/message/local/dao/MessageDaoTest.kt
@@ -69,9 +69,11 @@ class MessageDaoTest {
             senderUsername = "user",
             senderAvatarUrl = null,
             replyToMessageId = null,
+            forwardedFromMessageId = null,
             type = "text",
             text = text,
             status = null,
+            attachmentWaveformJson = null,
             createdAt = "2026-03-08T12:00:00Z",
             updatedAt = null,
         )
diff --git a/docs/android-checklist.md b/docs/android-checklist.md
index d60f8a8..c70409c 100644
--- a/docs/android-checklist.md
+++ b/docs/android-checklist.md
@@ -53,9 +53,9 @@
 - [x] Reply/quote
 - [x] Edit (<=7 дней)
 - [x] Delete for me / for all (по правам)
-- [ ] Forward в 1+ чатов
-- [ ] Reactions
-- [ ] Delivery/read states
+- [x] Forward в 1+ чатов
+- [x] Reactions
+- [x] Delivery/read states
 
 ## 8. Медиа и вложения
 - [x] Upload image/video/file/audio