android: restructure chat top app bar with header metadata

android/CHANGELOG.md

@@ -206,3 +206,9 @@
 - 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.
+
+### Step 33 - Chat UI / top app bar restructuring
+- Extended chat UI state with resolved chat header fields (`chatTitle`, `chatSubtitle`, `chatAvatarUrl`).
+- Updated chat top app bar layout to Telegram-like structure: back, avatar, title, status, call action, menu action.
+- Kept load-more behavior accessible via menu placeholder action button.
+- Updated Telegram UI batch-2 checklist item for chat top app bar.

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

@@ -24,6 +24,8 @@ import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.Button
@@ -43,6 +45,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.unit.dp
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.safeDrawing
@@ -125,15 +128,50 @@ fun ChatScreen(
                 .background(MaterialTheme.colorScheme.surfaceVariant)
                 .padding(horizontal = 12.dp, vertical = 10.dp),
             verticalAlignment = Alignment.CenterVertically,
-            horizontalArrangement = Arrangement.SpaceBetween,
+            horizontalArrangement = Arrangement.spacedBy(10.dp),
         ) {
             Button(onClick = onBack) { Text("Back") }
-            Text(
-                text = "Chat #${state.chatId}",
-                style = MaterialTheme.typography.titleMedium,
-            )
+            if (!state.chatAvatarUrl.isNullOrBlank()) {
+                AsyncImage(
+                    model = state.chatAvatarUrl,
+                    contentDescription = "Chat avatar",
+                    modifier = Modifier
+                        .size(40.dp)
+                        .clip(CircleShape),
+                    contentScale = ContentScale.Crop,
+                )
+            } else {
+                Box(
+                    modifier = Modifier
+                        .size(40.dp)
+                        .clip(CircleShape)
+                        .background(MaterialTheme.colorScheme.primaryContainer),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Text(
+                        text = state.chatTitle.firstOrNull()?.uppercase() ?: "?",
+                        style = MaterialTheme.typography.titleSmall,
+                    )
+                }
+            }
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text = state.chatTitle.ifBlank { "Chat #${state.chatId}" },
+                    style = MaterialTheme.typography.titleMedium,
+                    maxLines = 1,
+                )
+                if (state.chatSubtitle.isNotBlank()) {
+                    Text(
+                        text = state.chatSubtitle,
+                        style = MaterialTheme.typography.labelSmall,
+                    )
+                }
+            }
+            Button(onClick = { /* call action placeholder */ }) {
+                Text("Call")
+            }
             Button(onClick = onLoadMore, enabled = !state.isLoadingMore) {
-                Text(if (state.isLoadingMore) "..." else "Load older")
+                Text("⋮")
             }
         }
         val pinnedMessage = state.pinnedMessage

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

@@ -455,11 +455,22 @@ class ChatViewModel @Inject constructor(
                 } else {
                     "Only channel owner/admin can send messages."
                 }
+                val chatTitle = chat.displayTitle.ifBlank { "Chat #$chatId" }
+                val chatSubtitle = when {
+                    chat.type.equals("private", ignoreCase = true) && chat.counterpartIsOnline == true -> "online"
+                    chat.type.equals("private", ignoreCase = true) && !chat.counterpartLastSeenAt.isNullOrBlank() -> "last seen recently"
+                    chat.type.equals("group", ignoreCase = true) -> "group"
+                    chat.type.equals("channel", ignoreCase = true) -> "channel"
+                    else -> ""
+                }
                 _uiState.update {
                     val pinnedMessage = chat.pinnedMessageId?.let { pinnedId ->
                         it.messages.firstOrNull { message -> message.id == pinnedId }
                     }
                     it.copy(
+                        chatTitle = chatTitle,
+                        chatSubtitle = chatSubtitle,
+                        chatAvatarUrl = chat.avatarUrl ?: chat.counterpartAvatarUrl,
                         canSendMessages = canSend,
                         sendRestrictionText = restriction,
                         pinnedMessageId = chat.pinnedMessageId,

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

@@ -10,6 +10,9 @@ data class MessageUiState(
     val isSending: Boolean = false,
     val isUploadingMedia: Boolean = false,
     val errorMessage: String? = null,
+    val chatTitle: String = "",
+    val chatSubtitle: String = "",
+    val chatAvatarUrl: String? = null,
     val messages: List<MessageItem> = emptyList(),
     val pinnedMessageId: Long? = null,
     val pinnedMessage: MessageItem? = null,

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

@@ -4,7 +4,7 @@
 Источник: 10 скринов Telegram Android (чат, контекстные действия, медиа, поиск/чаты)
 
 ## P0 — Chat Screen Parity (must-have)
-- [ ] Top app bar чата: back + avatar + name + status + call + menu, полупрозрачная подложка на фоне обоев.
+- [x] Top app bar чата: back + avatar + name + status + call + menu, полупрозрачная подложка на фоне обоев.
 - [x] Закреплённое сообщение блоком под app bar (2 строки, иконки pin/close, tap для перехода).
 - [ ] Message composer Telegram-стиля:
 - [ ] Полупрозрачный rounded input контейнер.