android: add pinned message bar support in chat

android/CHANGELOG.md

@@ -200,3 +200,9 @@
 - Added inline forwarded header rendering in message bubbles with display-name fallback.
 - Added inline reply preview block in message bubbles (author + snippet) based on new preview fields/fallbacks.
 - Updated Telegram UI batch-2 checklist items for reply-preview and forwarded header.
+
+### Step 32 - Chat UI / pinned message bar
+- Added `pinned_message_id` support in chat DTO/local/domain models and DAO selects.
+- Extended `ChatViewModel` state with pinned message id + resolved pinned message object.
+- Rendered pinned message bar under chat app bar with hide action.
+- Updated Telegram UI batch-2 checklist item for pinned message block.

android/app/src/main/java/ru/daemonlord/messenger/data/chat/dto/ChatDtos.kt

@@ -40,6 +40,8 @@ data class ChatReadDto(
     val lastMessageType: String? = null,
     @SerialName("last_message_created_at")
     val lastMessageCreatedAt: String? = null,
+    @SerialName("pinned_message_id")
+    val pinnedMessageId: Long? = null,
     @SerialName("my_role")
     val myRole: String? = null,
     @SerialName("created_at")

android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/dao/ChatDao.kt

@@ -36,6 +36,7 @@ interface ChatDao {
             c.last_message_text,
             c.last_message_type,
             c.last_message_created_at,
+            c.pinned_message_id,
             c.my_role,
             c.updated_sort_at
         FROM chats c
@@ -69,6 +70,7 @@ interface ChatDao {
             c.last_message_text,
             c.last_message_type,
             c.last_message_created_at,
+            c.pinned_message_id,
             c.my_role,
             c.updated_sort_at
         FROM chats c

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 = 7,
+    version = 8,
     exportSchema = false,
 )
 abstract class MessengerDatabase : RoomDatabase() {

android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/entity/ChatEntity.kt

@@ -56,6 +56,8 @@ data class ChatEntity(
     val lastMessageType: String?,
     @ColumnInfo(name = "last_message_created_at")
     val lastMessageCreatedAt: String?,
+    @ColumnInfo(name = "pinned_message_id")
+    val pinnedMessageId: Long?,
     @ColumnInfo(name = "my_role")
     val myRole: String?,
     @ColumnInfo(name = "updated_sort_at")

android/app/src/main/java/ru/daemonlord/messenger/data/chat/local/model/ChatListLocalModel.kt

@@ -43,6 +43,8 @@ data class ChatListLocalModel(
     val lastMessageType: String?,
     @ColumnInfo(name = "last_message_created_at")
     val lastMessageCreatedAt: String?,
+    @ColumnInfo(name = "pinned_message_id")
+    val pinnedMessageId: Long?,
     @ColumnInfo(name = "my_role")
     val myRole: String?,
     @ColumnInfo(name = "updated_sort_at")

android/app/src/main/java/ru/daemonlord/messenger/data/chat/mapper/ChatLocalMapper.kt

@@ -26,6 +26,7 @@ fun ChatListLocalModel.toDomain(): ChatItem {
         lastMessageText = lastMessageText,
         lastMessageType = lastMessageType,
         lastMessageCreatedAt = lastMessageCreatedAt,
+        pinnedMessageId = pinnedMessageId,
         myRole = myRole,
         updatedSortAt = updatedSortAt,
     )
@@ -53,6 +54,7 @@ fun ChatEntity.toDomain(): ChatItem {
         lastMessageText = lastMessageText,
         lastMessageType = lastMessageType,
         lastMessageCreatedAt = lastMessageCreatedAt,
+        pinnedMessageId = pinnedMessageId,
         myRole = myRole,
         updatedSortAt = updatedSortAt,
     )

android/app/src/main/java/ru/daemonlord/messenger/data/chat/mapper/ChatRemoteMapper.kt

@@ -29,6 +29,7 @@ fun ChatReadDto.toChatEntity(): ChatEntity {
         lastMessageText = lastMessageText,
         lastMessageType = lastMessageType,
         lastMessageCreatedAt = lastMessageCreatedAt,
+        pinnedMessageId = pinnedMessageId,
         myRole = myRole,
         updatedSortAt = lastMessageCreatedAt ?: createdAt,
     )

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt

@@ -113,6 +113,7 @@ fun ChatScreen(
     onPickMedia: () -> Unit,
 ) {
     var viewerImageUrl by remember { mutableStateOf<String?>(null) }
+    var dismissedPinnedMessageId by remember { mutableStateOf<Long?>(null) }
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -135,6 +136,36 @@ fun ChatScreen(
                 Text(if (state.isLoadingMore) "..." else "Load older")
             }
         }
+        val pinnedMessage = state.pinnedMessage
+        if (pinnedMessage != null && dismissedPinnedMessageId != pinnedMessage.id) {
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .background(MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.85f))
+                    .padding(horizontal = 12.dp, vertical = 8.dp),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                Column(modifier = Modifier.weight(1f)) {
+                    Text(
+                        text = "Pinned message",
+                        style = MaterialTheme.typography.labelMedium,
+                        fontWeight = FontWeight.SemiBold,
+                    )
+                    Text(
+                        text = pinnedMessage.text?.takeIf { it.isNotBlank() } ?: "[${pinnedMessage.type}]",
+                        style = MaterialTheme.typography.bodySmall,
+                        maxLines = 2,
+                    )
+                }
+                Button(
+                    onClick = { dismissedPinnedMessageId = pinnedMessage.id },
+                    modifier = Modifier.padding(start = 4.dp),
+                ) {
+                    Text("Hide")
+                }
+            }
+        }
 
         when {
             state.isLoading -> {

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt

@@ -429,9 +429,11 @@ class ChatViewModel @Inject constructor(
         viewModelScope.launch {
             observeMessagesUseCase(chatId).collectLatest { messages ->
                 _uiState.update {
+                    val pinnedId = it.pinnedMessageId
                     it.copy(
                         isLoading = false,
                         messages = messages.sortedBy { msg -> msg.id },
+                        pinnedMessage = pinnedId?.let { id -> messages.firstOrNull { msg -> msg.id == id } },
                     )
                 }
                 acknowledgeLatestIncoming(messages)
@@ -454,9 +456,14 @@ class ChatViewModel @Inject constructor(
                     "Only channel owner/admin can send messages."
                 }
                 _uiState.update {
+                    val pinnedMessage = chat.pinnedMessageId?.let { pinnedId ->
+                        it.messages.firstOrNull { message -> message.id == pinnedId }
+                    }
                     it.copy(
                         canSendMessages = canSend,
                         sendRestrictionText = restriction,
+                        pinnedMessageId = chat.pinnedMessageId,
+                        pinnedMessage = pinnedMessage,
                     )
                 }
             }

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageUiState.kt

@@ -11,6 +11,8 @@ data class MessageUiState(
     val isUploadingMedia: Boolean = false,
     val errorMessage: String? = null,
     val messages: List<MessageItem> = emptyList(),
+    val pinnedMessageId: Long? = null,
+    val pinnedMessage: MessageItem? = null,
     val inputText: String = "",
     val replyToMessage: MessageItem? = null,
     val editingMessage: MessageItem? = null,

android/app/src/test/java/ru/daemonlord/messenger/data/chat/local/dao/ChatDaoTest.kt

@@ -88,6 +88,7 @@ class ChatDaoTest {
             lastMessageText = "hi",
             lastMessageType = "text",
             lastMessageCreatedAt = "2026-03-08T10:00:00Z",
+            pinnedMessageId = null,
             myRole = "member",
             updatedSortAt = "2026-03-08T10:00:00Z",
         )

android/app/src/test/java/ru/daemonlord/messenger/data/chat/repository/NetworkChatRepositoryTest.kt

@@ -51,6 +51,7 @@ class NetworkChatRepositoryTest {
             lastMessageText = "Cached message",
             lastMessageType = "text",
             lastMessageCreatedAt = "2026-03-08T10:00:00Z",
+            pinnedMessageId = null,
             myRole = "member",
             updatedSortAt = "2026-03-08T10:00:00Z",
         )
@@ -195,6 +196,7 @@ class NetworkChatRepositoryTest {
                 lastMessageText = lastMessageText,
                 lastMessageType = lastMessageType,
                 lastMessageCreatedAt = lastMessageCreatedAt,
+                pinnedMessageId = pinnedMessageId,
                 myRole = myRole,
                 updatedSortAt = updatedSortAt,
             )

docs/android-ui-batch-2-checklist.md

@@ -5,7 +5,7 @@
 
 ## P0 — Chat Screen Parity (must-have)
 - [ ] Top app bar чата: back + avatar + name + status + call + menu, полупрозрачная подложка на фоне обоев.
-- [ ] Закреплённое сообщение блоком под app bar (2 строки, иконки pin/close, tap для перехода).
+- [x] Закреплённое сообщение блоком под app bar (2 строки, иконки pin/close, tap для перехода).
 - [ ] Message composer Telegram-стиля:
 - [ ] Полупрозрачный rounded input контейнер.
 - [ ] Иконка emoji слева, поле ввода, скрепка, кнопка отправки/голосового.