diff --git a/android/CHANGELOG.md b/android/CHANGELOG.md
index 93e201e..b491f65 100644
--- a/android/CHANGELOG.md
+++ b/android/CHANGELOG.md
@@ -162,3 +162,10 @@
 - Added safe area insets handling (`WindowInsets.safeDrawing`) for login, chat list, session-check and chat screens.
 - Added bottom composer protection in chat screen with `navigationBarsPadding()` and `imePadding()`.
 - Fixed UI overlap with status bar and navigation bar on modern Android devices.
+
+### Step 26 - Core base / bulk forward foundation
+- Added message API/data contracts for bulk forward (`POST /api/v1/messages/{message_id}/forward-bulk`).
+- Extended `MessageRepository` with `forwardMessageBulk(...)`.
+- Implemented bulk-forward flow in `NetworkMessageRepository` with Room/chat last-message updates.
+- Added `ForwardMessageBulkUseCase` for future multi-select message actions.
+- Updated message repository unit test fakes to cover new API surface.
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 68c7c3f..e4344f0 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
@@ -9,6 +9,7 @@ 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.MessageForwardBulkRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageReadDto
 import ru.daemonlord.messenger.data.message.dto.MessageReactionDto
 import ru.daemonlord.messenger.data.message.dto.MessageReactionToggleRequestDto
@@ -51,6 +52,12 @@ interface MessageApiService {
         @Body request: MessageForwardRequestDto,
     ): MessageReadDto
 
+    @POST("/api/v1/messages/{message_id}/forward-bulk")
+    suspend fun forwardMessageBulk(
+        @Path("message_id") messageId: Long,
+        @Body request: MessageForwardBulkRequestDto,
+    ): List<MessageReadDto>
+
     @GET("/api/v1/messages/{message_id}/reactions")
     suspend fun listReactions(
         @Path("message_id") messageId: Long,
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 a0ae6c2..7452b99 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
@@ -60,6 +60,14 @@ data class MessageForwardRequestDto(
     val includeAuthor: Boolean = true,
 )
 
+@Serializable
+data class MessageForwardBulkRequestDto(
+    @SerialName("target_chat_ids")
+    val targetChatIds: List<Long>,
+    @SerialName("include_author")
+    val includeAuthor: Boolean = true,
+)
+
 @Serializable
 data class MessageReactionDto(
     val emoji: String,
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 0cc9bda..defffec 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
@@ -26,6 +26,7 @@ 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.MessageForwardBulkRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageReactionToggleRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageStatusUpdateRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageUpdateRequestDto
@@ -313,6 +314,38 @@ class NetworkMessageRepository @Inject constructor(
         }
     }
 
+    override suspend fun forwardMessageBulk(
+        messageId: Long,
+        targetChatIds: List<Long>,
+        includeAuthor: Boolean,
+    ): AppResult<Unit> = withContext(ioDispatcher) {
+        if (targetChatIds.isEmpty()) return@withContext AppResult.Success(Unit)
+        try {
+            val forwarded = messageApiService.forwardMessageBulk(
+                messageId = messageId,
+                request = MessageForwardBulkRequestDto(
+                    targetChatIds = targetChatIds,
+                    includeAuthor = includeAuthor,
+                ),
+            )
+            if (forwarded.isNotEmpty()) {
+                messageDao.upsertMessages(forwarded.map { it.toEntity() })
+                forwarded.forEach { message ->
+                    chatDao.updateLastMessage(
+                        chatId = message.chatId,
+                        lastMessageText = message.text,
+                        lastMessageType = message.type,
+                        lastMessageCreatedAt = message.createdAt,
+                        updatedSortAt = message.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() }
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 98348a7..3cfa764 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
@@ -23,6 +23,7 @@ interface MessageRepository {
     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 forwardMessageBulk(messageId: Long, targetChatIds: List<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/ForwardMessageBulkUseCase.kt b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ForwardMessageBulkUseCase.kt
new file mode 100644
index 0000000..fb616b3
--- /dev/null
+++ b/android/app/src/main/java/ru/daemonlord/messenger/domain/message/usecase/ForwardMessageBulkUseCase.kt
@@ -0,0 +1,21 @@
+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 ForwardMessageBulkUseCase @Inject constructor(
+    private val repository: MessageRepository,
+) {
+    suspend operator fun invoke(
+        messageId: Long,
+        targetChatIds: List<Long>,
+        includeAuthor: Boolean = true,
+    ): AppResult<Unit> {
+        return repository.forwardMessageBulk(
+            messageId = messageId,
+            targetChatIds = targetChatIds,
+            includeAuthor = includeAuthor,
+        )
+    }
+}
diff --git a/android/app/src/test/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepositoryTest.kt b/android/app/src/test/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepositoryTest.kt
index a14dc34..4c46101 100644
--- a/android/app/src/test/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepositoryTest.kt
+++ b/android/app/src/test/java/ru/daemonlord/messenger/data/message/repository/NetworkMessageRepositoryTest.kt
@@ -26,6 +26,7 @@ import ru.daemonlord.messenger.data.media.dto.UploadUrlResponseDto
 import ru.daemonlord.messenger.data.message.api.MessageApiService
 import ru.daemonlord.messenger.data.message.dto.MessageCreateRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageForwardRequestDto
+import ru.daemonlord.messenger.data.message.dto.MessageForwardBulkRequestDto
 import ru.daemonlord.messenger.data.message.dto.MessageReadDto
 import ru.daemonlord.messenger.data.message.dto.MessageReactionDto
 import ru.daemonlord.messenger.data.message.dto.MessageReactionToggleRequestDto
@@ -145,6 +146,18 @@ class NetworkMessageRepositoryTest {
             return sendResponse.copy(id = messageId + 1000, chatId = request.targetChatId)
         }
 
+        override suspend fun forwardMessageBulk(
+            messageId: Long,
+            request: MessageForwardBulkRequestDto,
+        ): List<MessageReadDto> {
+            return request.targetChatIds.mapIndexed { index, chatId ->
+                sendResponse.copy(
+                    id = messageId + 2000 + index,
+                    chatId = chatId,
+                )
+            }
+        }
+
         override suspend fun listReactions(messageId: Long): List<MessageReactionDto> = emptyList()
 
         override suspend fun toggleReaction(