Добавлено отслеживание количества участников группы в ChatDetailScreen

app/src/main/java/com/rosetta/messenger/ui/chats/ChatDetailScreen.kt

@@ -425,6 +425,9 @@ fun ChatDetailScreen(
         var groupAdminKeys by remember(user.publicKey, currentUserPublicKey) {
                 mutableStateOf<Set<String>>(emptySet())
         }
+        var groupMembersCount by remember(user.publicKey, currentUserPublicKey) {
+                mutableStateOf<Int?>(null)
+        }
         var mentionCandidates by remember(user.publicKey, currentUserPublicKey) {
                 mutableStateOf<List<MentionCandidate>>(emptyList())
         }
@@ -439,6 +442,7 @@ fun ChatDetailScreen(
         LaunchedEffect(isGroupChat, user.publicKey, currentUserPublicKey) {
                 if (!isGroupChat || user.publicKey.isBlank() || currentUserPublicKey.isBlank()) {
                         groupAdminKeys = emptySet()
+                        groupMembersCount = null
                         mentionCandidates = emptyList()
                         return@LaunchedEffect
                 }
@@ -446,15 +450,20 @@ fun ChatDetailScreen(
                 val members = withContext(Dispatchers.IO) {
                         groupRepository.requestGroupMembers(user.publicKey).orEmpty()
                 }
-                val adminKey = members.firstOrNull().orEmpty()
+                val normalizedMembers =
+                        members.map { it.trim() }
+                                .filter { it.isNotBlank() }
+                                .distinct()
+                groupMembersCount = normalizedMembers.size
+
+                val adminKey = normalizedMembers.firstOrNull().orEmpty()
                 groupAdminKeys =
                         if (adminKey.isBlank()) emptySet() else setOf(adminKey)
 
                 mentionCandidates =
                         withContext(Dispatchers.IO) {
-                                members.map { it.trim() }
-                                        .filter { it.isNotBlank() && !it.equals(currentUserPublicKey.trim(), ignoreCase = true) }
-                                        .distinct()
+                                normalizedMembers
+                                        .filter { !it.equals(currentUserPublicKey.trim(), ignoreCase = true) }
                                         .mapNotNull { memberKey ->
                                                 val resolvedUser = viewModel.resolveUserForProfile(memberKey) ?: return@mapNotNull null
                                                 val normalizedUsername = resolvedUser.username.trim().trimStart('@')
@@ -636,10 +645,13 @@ fun ChatDetailScreen(
         val isRosettaOfficial = user.title.equals("Rosetta", ignoreCase = true) ||
                 user.username.equals("rosetta", ignoreCase = true) ||
                 isSystemAccount
+        val groupMembersSubtitleCount = groupMembersCount ?: 0
+        val groupMembersSubtitle =
+                "$groupMembersSubtitleCount member${if (groupMembersSubtitleCount == 1) "" else "s"}"
         val chatSubtitle =
                 when {
                         isSavedMessages -> "Notes"
-                        isGroupChat -> "group"
+                        isGroupChat -> groupMembersSubtitle
                         isTyping -> "" // Пустая строка, используем компонент TypingIndicator
                         isOnline -> "online"
                         isSystemAccount -> "official account"